diff options
Diffstat (limited to 'rtkaio/sysdeps/unix/sysv')
35 files changed, 2656 insertions, 0 deletions
diff --git a/rtkaio/sysdeps/unix/sysv/linux/Implies b/rtkaio/sysdeps/unix/sysv/linux/Implies new file mode 100644 index 0000000000..329b6a20ca --- /dev/null +++ b/rtkaio/sysdeps/unix/sysv/linux/Implies @@ -0,0 +1 @@ +rtkaio diff --git a/rtkaio/sysdeps/unix/sysv/linux/Makefile b/rtkaio/sysdeps/unix/sysv/linux/Makefile new file mode 100644 index 0000000000..9ed3d7551a --- /dev/null +++ b/rtkaio/sysdeps/unix/sysv/linux/Makefile @@ -0,0 +1,4 @@ +ifeq ($(subdir),rtkaio) +CFLAGS-kaio_mq_send.c += -fexceptions +CFLAGS-kaio_mq_receive.c += -fexceptions +endif diff --git a/rtkaio/sysdeps/unix/sysv/linux/alpha/Versions b/rtkaio/sysdeps/unix/sysv/linux/alpha/Versions new file mode 100644 index 0000000000..b2d59a9140 --- /dev/null +++ b/rtkaio/sysdeps/unix/sysv/linux/alpha/Versions @@ -0,0 +1,6 @@ +librtkaio { + GLIBC_2.3 { + # AIO functions. + aio_cancel; aio_cancel64; + } +} diff --git a/rtkaio/sysdeps/unix/sysv/linux/alpha/kaio_cancel.c b/rtkaio/sysdeps/unix/sysv/linux/alpha/kaio_cancel.c new file mode 100644 index 0000000000..6e345e1643 --- /dev/null +++ b/rtkaio/sysdeps/unix/sysv/linux/alpha/kaio_cancel.c @@ -0,0 +1,33 @@ +#include <shlib-compat.h> + +#define aio_cancel64 XXX +#include <aio.h> +#undef aio_cancel64 +#include <errno.h> + +extern __typeof (aio_cancel) __new_aio_cancel; +extern __typeof (aio_cancel) __old_aio_cancel; + +#define aio_cancel __new_aio_cancel + +#include <sysdeps/unix/sysv/linux/kaio_cancel.c> + +#undef aio_cancel +strong_alias (__new_aio_cancel, __new_aio_cancel64); +versioned_symbol (librt, __new_aio_cancel, aio_cancel, GLIBC_2_3); +versioned_symbol (librt, __new_aio_cancel64, aio_cancel64, GLIBC_2_3); + +#if SHLIB_COMPAT (librt, GLIBC_2_1, GLIBC_2_3) + +#undef ECANCELED +#define aio_cancel __old_aio_cancel +#define ECANCELED 125 + +#include <sysdeps/unix/sysv/linux/kaio_cancel.c> + +#undef aio_cancel +strong_alias (__old_aio_cancel, __old_aio_cancel64); +compat_symbol (librt, __old_aio_cancel, aio_cancel, GLIBC_2_1); +compat_symbol (librt, __old_aio_cancel64, aio_cancel64, GLIBC_2_1); + +#endif diff --git a/rtkaio/sysdeps/unix/sysv/linux/ia64/Makefile b/rtkaio/sysdeps/unix/sysv/linux/ia64/Makefile new file mode 100644 index 0000000000..ead21fb111 --- /dev/null +++ b/rtkaio/sysdeps/unix/sysv/linux/ia64/Makefile @@ -0,0 +1,3 @@ +ifeq ($(subdir),rtkaio) +librtkaio-routines += rtkaio-sysdep +endif diff --git a/rtkaio/sysdeps/unix/sysv/linux/ia64/Versions b/rtkaio/sysdeps/unix/sysv/linux/ia64/Versions new file mode 100644 index 0000000000..7443c81d6a --- /dev/null +++ b/rtkaio/sysdeps/unix/sysv/linux/ia64/Versions @@ -0,0 +1,9 @@ +%ifdef HAVE_FORCED_UNWIND +librtkaio { + GLIBC_2.3.3 { + # Changed timer_t. + timer_create; timer_delete; timer_getoverrun; timer_gettime; + timer_settime; + } +} +%endif diff --git a/rtkaio/sysdeps/unix/sysv/linux/ia64/rtkaio-sysdep.S b/rtkaio/sysdeps/unix/sysv/linux/ia64/rtkaio-sysdep.S new file mode 100644 index 0000000000..11ee214b23 --- /dev/null +++ b/rtkaio/sysdeps/unix/sysv/linux/ia64/rtkaio-sysdep.S @@ -0,0 +1 @@ +#include <rt-sysdep.S> diff --git a/rtkaio/sysdeps/unix/sysv/linux/kaio_cancel.c b/rtkaio/sysdeps/unix/sysv/linux/kaio_cancel.c new file mode 100644 index 0000000000..7d2738d5bc --- /dev/null +++ b/rtkaio/sysdeps/unix/sysv/linux/kaio_cancel.c @@ -0,0 +1,238 @@ +/* Cancel requests associated with given file descriptor. + Copyright (C) 1997, 1998, 2000, 2002, 2003, 2005 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +/* We use an UGLY hack to prevent gcc from finding us cheating. The + implementation of aio_cancel and aio_cancel64 are identical and so + we want to avoid code duplication by using aliases. But gcc sees + the different parameter lists and prints a warning. We define here + a function so that aio_cancel64 has no prototype. */ +#ifndef aio_cancel +#define aio_cancel64 XXX +#include <aio.h> +/* And undo the hack. */ +#undef aio_cancel64 +#endif + +#include <kaio_misc.h> + +#ifndef USE_KAIO +#include <aio_cancel.c> +#else + +#include <assert.h> +#include <errno.h> + +int +aio_cancel (fildes, aiocbp) + int fildes; + struct aiocb *aiocbp; +{ + struct requestlist *req = NULL; + int result = AIO_ALLDONE; + + /* If fildes is invalid, error. */ + if (fcntl (fildes, F_GETFL) < 0) + { + __set_errno (EBADF); + return -1; + } + + /* Request the mutex. */ + pthread_mutex_lock (&__aio_requests_mutex); + + /* We are asked to cancel a specific AIO request. */ + if (aiocbp != NULL) + { + /* If the AIO request is not for this descriptor it has no value + to look for the request block. */ + if (aiocbp->aio_fildes != fildes) + { + pthread_mutex_unlock (&__aio_requests_mutex); + __set_errno (EINVAL); + return -1; + } + else if (aiocbp->__error_code == EINPROGRESS) + { + struct requestlist *last = NULL; + + req = __aio_find_req_fd (fildes); + + if (req != NULL) + while (req->aiocbp != (aiocb_union *) aiocbp) + { + last = req; + req = req->next_prio; + if (req == NULL) + break; + } + + if (req != NULL) + { + /* Don't remove the entry if a thread is already working on + it. */ + if (req->running == allocated) + { + result = AIO_NOTCANCELED; + req = NULL; + } + else + { + /* We can remove the entry. */ + __aio_remove_request (last, req, 0); + + result = AIO_CANCELED; + + req->next_prio = NULL; + } + } + else + { + /* Try kernel requests. */ + req = __aio_find_req ((aiocb_union *) aiocbp); + + if (req == NULL) + { + pthread_mutex_unlock (&__aio_requests_mutex); + __set_errno (EINVAL); + return -1; + } + + assert (req->kioctx != KCTX_NONE); + + /* If kernel is working on it, try cancelling it. */ + if (req->running == allocated) + { + struct kio_event ev; + INTERNAL_SYSCALL_DECL (err); + int res; + + res = INTERNAL_SYSCALL (io_cancel, err, 3, __aio_kioctx, + &req->kiocb, &ev); + if (INTERNAL_SYSCALL_ERROR_P (res, err)) + { + result = AIO_NOTCANCELED; + req = NULL; + } + else + req->running = queued; + } + if (req != NULL) + { + /* We can remove the entry. */ + __aio_remove_krequest (req); + result = AIO_CANCELED; + req->next_prio = NULL; + } + } + } + } + else + { + /* Find the beginning of the list of all requests for this + desriptor. */ + req = __aio_find_req_fd (fildes); + + /* If any request is worked on by a thread it must be the first. + So either we can delete all requests or all but the first. */ + if (req != NULL) + { + if (req->running == allocated) + { + struct requestlist *old = req; + req = req->next_prio; + old->next_prio = NULL; + + result = AIO_NOTCANCELED; + + if (req != NULL) + __aio_remove_request (old, req, 1); + } + else + { + result = AIO_CANCELED; + + /* We can remove the entry. */ + __aio_remove_request (NULL, req, 1); + } + } + + if (result != AIO_NOTCANCELED) + { + /* Try to cancel kernel requests. */ + struct requestlist *kreq = __aio_find_kreq_fd (fildes); + + while (kreq) + { + struct requestlist *next; + + /* If kernel is working on it, try cancelling it. */ + if (kreq->running == allocated) + { + struct kio_event ev; + INTERNAL_SYSCALL_DECL (err); + int res; + + res = INTERNAL_SYSCALL (io_cancel, err, 3, __aio_kioctx, + &kreq->kiocb, &ev); + if (INTERNAL_SYSCALL_ERROR_P (res, err)) + { + result = AIO_NOTCANCELED; + break; + } + else + kreq->running = queued; + } + next = kreq->next_prio; + __aio_remove_krequest (kreq); + result = AIO_CANCELED; + kreq->next_prio = NULL; + assert (kreq->running == yes || kreq->running == queued); + kreq->aiocbp->aiocb.__error_code = ECANCELED; + kreq->aiocbp->aiocb.__return_value = -1; + __aio_notify (kreq); + __aio_free_request (kreq); + kreq = next; + } + } + } + + /* Mark requests as canceled and send signal. */ + while (req != NULL) + { + struct requestlist *old = req; + assert (req->running == yes || req->running == queued); + req->aiocbp->aiocb.__error_code = ECANCELED; + req->aiocbp->aiocb.__return_value = -1; + __aio_notify (req); + req = req->next_prio; + __aio_free_request (old); + } + + /* Release the mutex. */ + pthread_mutex_unlock (&__aio_requests_mutex); + + return result; +} + +#ifndef aio_cancel +weak_alias (aio_cancel, aio_cancel64) +#endif + +#endif diff --git a/rtkaio/sysdeps/unix/sysv/linux/kaio_error.c b/rtkaio/sysdeps/unix/sysv/linux/kaio_error.c new file mode 100644 index 0000000000..23859c363a --- /dev/null +++ b/rtkaio/sysdeps/unix/sysv/linux/kaio_error.c @@ -0,0 +1,54 @@ +/* Return error status of asynchronous I/O request. + Copyright (C) 1997, 2002, 2003 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +/* We use an UGLY hack to prevent gcc from finding us cheating. The + implementation of aio_error and aio_error64 are identical and so + we want to avoid code duplication by using aliases. But gcc sees + the different parameter lists and prints a warning. We define here + a function so that aio_error64 has no prototype. */ +#define aio_error64 XXX +#include <aio.h> +/* And undo the hack. */ +#undef aio_error64 + +#include <kaio_misc.h> + +#ifndef USE_KAIO +#include <aio_error.c> +#else + +#include <errno.h> + +int +aio_error (aiocbp) + const struct aiocb *aiocbp; +{ + int ret = aiocbp->__error_code; + + if (ret == EINPROGRESS) + { + __aio_read_one_event (); + ret = aiocbp->__error_code; + } + return ret; +} + +weak_alias (aio_error, aio_error64) +#endif diff --git a/rtkaio/sysdeps/unix/sysv/linux/kaio_fsync.c b/rtkaio/sysdeps/unix/sysv/linux/kaio_fsync.c new file mode 100644 index 0000000000..d51bbe0135 --- /dev/null +++ b/rtkaio/sysdeps/unix/sysv/linux/kaio_fsync.c @@ -0,0 +1,6 @@ +#define aio_fsync64 XXX +#include <aio.h> +/* And undo the hack. */ +#undef aio_fsync64 +#include <kaio_misc.h> +#include <aio_fsync.c> diff --git a/rtkaio/sysdeps/unix/sysv/linux/kaio_misc.c b/rtkaio/sysdeps/unix/sysv/linux/kaio_misc.c new file mode 100644 index 0000000000..76e0c430b7 --- /dev/null +++ b/rtkaio/sysdeps/unix/sysv/linux/kaio_misc.c @@ -0,0 +1,1130 @@ +/* Handle general operations. + Copyright (C) 1997,1998,1999,2000,2001,2002,2003,2006 + Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <kaio_misc.h> + +#ifndef USE_KAIO +#include <aio_misc.c> +#else + +#include <aio.h> +#include <assert.h> +#include <atomic.h> +#include <errno.h> +#include <limits.h> +#include <pthread.h> +#include <stdlib.h> +#include <unistd.h> +#include <sys/stat.h> +#include <sys/time.h> +#include <sys/sysmacros.h> + +#ifndef aio_create_helper_thread +# define aio_create_helper_thread __aio_create_helper_thread + +extern inline int +__aio_create_helper_thread (pthread_t *threadp, void *(*tf) (void *), void *arg) +{ + pthread_attr_t attr; + + /* Make sure the thread is created detached. */ + pthread_attr_init (&attr); + pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); + + int ret = pthread_create (threadp, &attr, tf, arg); + + (void) pthread_attr_destroy (&attr); + return ret; +} + +#endif + + +static void add_request_to_runlist (struct requestlist *newrequest) + internal_function; +static int add_request_to_list (struct requestlist *newrequest, int fildes, + int prio) + internal_function; +static void * handle_kernel_aio (void *arg); +static void kernel_callback (kctx_t ctx, struct kiocb *kiocb, long res, + long res2); + +/* Pool of request list entries. */ +static struct requestlist **pool; + +/* Number of total and allocated pool entries. */ +static size_t pool_max_size; +static size_t pool_size; + +/* Kernel AIO context. */ +kctx_t __aio_kioctx = KCTX_NONE; +int __have_no_kernel_aio; +int __kernel_thread_started; + +/* We implement a two dimensional array but allocate each row separately. + The macro below determines how many entries should be used per row. + It should better be a power of two. */ +#define ENTRIES_PER_ROW 32 + +/* How many rows we allocate at once. */ +#define ROWS_STEP 8 + +/* List of available entries. */ +static struct requestlist *freelist; + +/* List of request waiting to be processed. */ +static struct requestlist *runlist; + +/* Structure list of all currently processed requests. */ +static struct requestlist *requests, *krequests; + +/* Number of threads currently running. */ +static int nthreads; + +/* Number of threads waiting for work to arrive. */ +static int idle_thread_count; + + +/* These are the values used to optimize the use of AIO. The user can + overwrite them by using the `aio_init' function. */ +static struct aioinit optim = +{ + 20, /* int aio_threads; Maximal number of threads. */ + 64, /* int aio_num; Number of expected simultanious requests. */ + 0, + 0, + 0, + 0, + 1, + 0 +}; + + +/* Since the list is global we need a mutex protecting it. */ +pthread_mutex_t __aio_requests_mutex = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP; + +/* When you add a request to the list and there are idle threads present, + you signal this condition variable. When a thread finishes work, it waits + on this condition variable for a time before it actually exits. */ +pthread_cond_t __aio_new_request_notification = PTHREAD_COND_INITIALIZER; + + +/* Functions to handle request list pool. */ +static struct requestlist * +get_elem (void) +{ + struct requestlist *result; + + if (freelist == NULL) + { + struct requestlist *new_row; + int cnt; + + assert (sizeof (struct aiocb) == sizeof (struct aiocb64)); + + if (pool_size + 1 >= pool_max_size) + { + size_t new_max_size = pool_max_size + ROWS_STEP; + struct requestlist **new_tab; + + new_tab = (struct requestlist **) + realloc (pool, new_max_size * sizeof (struct requestlist *)); + + if (new_tab == NULL) + return NULL; + + pool_max_size = new_max_size; + pool = new_tab; + } + + /* Allocate the new row. */ + cnt = pool_size == 0 ? optim.aio_num : ENTRIES_PER_ROW; + new_row = (struct requestlist *) calloc (cnt, + sizeof (struct requestlist)); + if (new_row == NULL) + return NULL; + + pool[pool_size++] = new_row; + + /* Put all the new entries in the freelist. */ + do + { + new_row->next_prio = freelist; + freelist = new_row++; + } + while (--cnt > 0); + } + + result = freelist; + freelist = freelist->next_prio; + + return result; +} + + +void +internal_function +__aio_free_request (struct requestlist *elem) +{ + elem->running = no; + elem->next_prio = freelist; + freelist = elem; +} + + +struct requestlist * +internal_function +__aio_find_req (aiocb_union *elem) +{ + struct requestlist *runp; + int fildes = elem->aiocb.aio_fildes; + int i; + + for (i = 0; i < 2; i++) + { + runp = i ? requests : krequests; + + while (runp != NULL && runp->aiocbp->aiocb.aio_fildes < fildes) + runp = runp->next_fd; + + if (runp != NULL) + { + if (runp->aiocbp->aiocb.aio_fildes != fildes) + runp = NULL; + else + while (runp != NULL && runp->aiocbp != elem) + runp = runp->next_prio; + if (runp != NULL) + return runp; + } + } + + return NULL; +} + + +struct requestlist * +internal_function +__aio_find_req_fd (int fildes) +{ + struct requestlist *runp = requests; + + while (runp != NULL && runp->aiocbp->aiocb.aio_fildes < fildes) + runp = runp->next_fd; + + return (runp != NULL && runp->aiocbp->aiocb.aio_fildes == fildes + ? runp : NULL); +} + + +struct requestlist * +internal_function +__aio_find_kreq_fd (int fildes) +{ + struct requestlist *runp = krequests; + + while (runp != NULL && runp->aiocbp->aiocb.aio_fildes < fildes) + runp = runp->next_fd; + + return (runp != NULL && runp->aiocbp->aiocb.aio_fildes == fildes + ? runp : NULL); +} + + +void +internal_function +__aio_remove_request (struct requestlist *last, struct requestlist *req, + int all) +{ + assert (req->running == yes || req->running == queued + || req->running == done); + assert (req->kioctx == KCTX_NONE); + + if (last != NULL) + last->next_prio = all ? NULL : req->next_prio; + else + { + if (all || req->next_prio == NULL) + { + if (req->last_fd != NULL) + req->last_fd->next_fd = req->next_fd; + else + requests = req->next_fd; + if (req->next_fd != NULL) + req->next_fd->last_fd = req->last_fd; + } + else + { + if (req->last_fd != NULL) + req->last_fd->next_fd = req->next_prio; + else + requests = req->next_prio; + + if (req->next_fd != NULL) + req->next_fd->last_fd = req->next_prio; + + req->next_prio->last_fd = req->last_fd; + req->next_prio->next_fd = req->next_fd; + + /* Mark this entry as runnable. */ + req->next_prio->running = yes; + } + + if (req->running == yes) + { + struct requestlist *runp = runlist; + + last = NULL; + while (runp != NULL) + { + if (runp == req) + { + if (last == NULL) + runlist = runp->next_run; + else + last->next_run = runp->next_run; + break; + } + last = runp; + runp = runp->next_run; + } + } + } +} + +void +internal_function +__aio_remove_krequest (struct requestlist *req) +{ + assert (req->running == yes || req->running == queued + || req->running == done); + assert (req->kioctx != KCTX_NONE); + + if (req->prev_prio != NULL) + { + req->prev_prio->next_prio = req->next_prio; + if (req->next_prio != NULL) + req->next_prio->prev_prio = req->prev_prio; + } + else if (req->next_prio == NULL) + { + if (req->last_fd != NULL) + req->last_fd->next_fd = req->next_fd; + else + krequests = req->next_fd; + if (req->next_fd != NULL) + req->next_fd->last_fd = req->last_fd; + } + else + { + if (req->last_fd != NULL) + req->last_fd->next_fd = req->next_prio; + else + krequests = req->next_prio; + if (req->next_fd != NULL) + req->next_fd->last_fd = req->next_prio; + + req->next_prio->prev_prio = NULL; + req->next_prio->last_fd = req->last_fd; + req->next_prio->next_fd = req->next_fd; + } +} + + +/* The thread handler. */ +static void *handle_fildes_io (void *arg); +static int wait_for_kernel_requests (int fildes); + + +/* User optimization. */ +void +__aio_init (const struct aioinit *init) +{ + /* Get the mutex. */ + pthread_mutex_lock (&__aio_requests_mutex); + + /* Only allow writing new values if the table is not yet allocated. */ + if (pool == NULL) + { + optim.aio_threads = init->aio_threads < 1 ? 1 : init->aio_threads; + optim.aio_num = (init->aio_num < ENTRIES_PER_ROW + ? ENTRIES_PER_ROW + : init->aio_num & ~ENTRIES_PER_ROW); + } + + if (init->aio_idle_time != 0) + optim.aio_idle_time = init->aio_idle_time; + + /* Release the mutex. */ + pthread_mutex_unlock (&__aio_requests_mutex); +} +weak_alias (__aio_init, aio_init) + +static void +kernel_callback (kctx_t ctx, struct kiocb *kiocb, long res, long res2) +{ + struct requestlist *req = (struct requestlist *)kiocb; + long errcode = 0; + + if (res < 0 && res > -1000) + { + errcode = -res; + res = -1; + } + req->aiocbp->aiocb.__return_value = res; + atomic_write_barrier (); + req->aiocbp->aiocb.__error_code = errcode; + __aio_notify (req); + assert (req->running == allocated); + req->running = done; + __aio_remove_krequest (req); + __aio_free_request (req); +} + +void +internal_function +__aio_read_one_event (void) +{ + struct kio_event ev[10]; + struct timespec ts; + int count, i; + + if (__aio_kioctx == KCTX_NONE) + return; + ts.tv_sec = 0; + ts.tv_nsec = 0; + do + { + INTERNAL_SYSCALL_DECL (err); + count = INTERNAL_SYSCALL (io_getevents, err, 5, __aio_kioctx, 0, 10, + ev, &ts); + if (INTERNAL_SYSCALL_ERROR_P (count, err) || count == 0) + break; + pthread_mutex_lock (&__aio_requests_mutex); + for (i = 0; i < count; i++) + { + void (*cb)(kctx_t, struct kiocb *, long, long); + + cb = (void *) (uintptr_t) ev[i].kioe_data; + cb (__aio_kioctx, (struct kiocb *) (uintptr_t) ev[i].kioe_obj, + ev[i].kioe_res, ev[i].kioe_res2); + } + pthread_mutex_unlock (&__aio_requests_mutex); + } + while (count == 10); +} + +int +internal_function +__aio_wait_for_events (kctx_t kctx, const struct timespec *timespec) +{ + int ret, i; + struct kio_event ev[10]; + struct timespec ts; + INTERNAL_SYSCALL_DECL (err); + + pthread_mutex_unlock (&__aio_requests_mutex); + ts.tv_sec = 0; + ts.tv_nsec = 0; + do + { + ret = INTERNAL_SYSCALL (io_getevents, err, 5, kctx, 1, 10, ev, + timespec); + if (INTERNAL_SYSCALL_ERROR_P (ret, err) || ret == 0) + break; + + pthread_mutex_lock (&__aio_requests_mutex); + for (i = 0; i < ret; i++) + { + void (*cb)(kctx_t, struct kiocb *, long, long); + + cb = (void *) (uintptr_t) ev[i].kioe_data; + cb (kctx, (struct kiocb *) (uintptr_t) ev[i].kioe_obj, + ev[i].kioe_res, ev[i].kioe_res2); + } + if (ret < 10) + return 0; + pthread_mutex_unlock (&__aio_requests_mutex); + timespec = &ts; + } + while (1); + + pthread_mutex_lock (&__aio_requests_mutex); + return (timespec != &ts + && INTERNAL_SYSCALL_ERROR_P (ret, err) + && INTERNAL_SYSCALL_ERRNO (ret, err) == ETIMEDOUT) ? ETIMEDOUT : 0; +} + +int +internal_function +__aio_create_kernel_thread (void) +{ + pthread_t thid; + + if (__kernel_thread_started) + return 0; + + if (aio_create_helper_thread (&thid, handle_kernel_aio, NULL) != 0) + return -1; + __kernel_thread_started = 1; + return 0; +} + +static void * +handle_kernel_aio (void *arg __attribute__((unused))) +{ + int ret, i; + INTERNAL_SYSCALL_DECL (err); + struct kio_event ev[10]; + + for (;;) + { + ret = INTERNAL_SYSCALL (io_getevents, err, 5, __aio_kioctx, 1, 10, ev, + NULL); + if (INTERNAL_SYSCALL_ERROR_P (ret, err) || ret == 0) + continue; + pthread_mutex_lock (&__aio_requests_mutex); + for (i = 0; i < ret; i++) + { + void (*cb)(kctx_t, struct kiocb *, long, long); + + cb = (void *) (uintptr_t) ev[i].kioe_data; + cb (__aio_kioctx, (struct kiocb *) (uintptr_t) ev[i].kioe_obj, + ev[i].kioe_res, ev[i].kioe_res2); + } + pthread_mutex_unlock (&__aio_requests_mutex); + } + return NULL; +} + +static int +internal_function +add_request_to_list (struct requestlist *newp, int fildes, int prio) +{ + struct requestlist *last, *runp, *reqs; + + last = NULL; + reqs = newp->kioctx != KCTX_NONE ? krequests : requests; + runp = reqs; + + /* First look whether the current file descriptor is currently + worked with. */ + while (runp != NULL + && runp->aiocbp->aiocb.aio_fildes < fildes) + { + last = runp; + runp = runp->next_fd; + } + + if (runp != NULL + && runp->aiocbp->aiocb.aio_fildes == fildes) + { + /* The current file descriptor is worked on. It makes no sense + to start another thread since this new thread would fight + with the running thread for the resources. But we also cannot + say that the thread processing this desriptor shall immediately + after finishing the current job process this request if there + are other threads in the running queue which have a higher + priority. */ + + /* Simply enqueue it after the running one according to the + priority. */ + while (runp->next_prio != NULL + && runp->next_prio->aiocbp->aiocb.__abs_prio >= prio) + runp = runp->next_prio; + + newp->next_prio = runp->next_prio; + runp->next_prio = newp; + if (newp->kioctx != KCTX_NONE) + { + newp->prev_prio = runp; + if (newp->next_prio != NULL) + newp->next_prio->prev_prio = newp; + } + return queued; + } + else + { + /* Enqueue this request for a new descriptor. */ + if (last == NULL) + { + newp->last_fd = NULL; + newp->next_fd = reqs; + if (reqs != NULL) + reqs->last_fd = newp; + if (newp->kioctx != KCTX_NONE) + krequests = newp; + else + requests = newp; + } + else + { + newp->next_fd = last->next_fd; + newp->last_fd = last; + last->next_fd = newp; + if (newp->next_fd != NULL) + newp->next_fd->last_fd = newp; + } + + newp->next_prio = NULL; + if (newp->kioctx != KCTX_NONE) + newp->prev_prio = NULL; + return yes; + } +} + +static int +internal_function +__aio_enqueue_user_request (struct requestlist *newp) +{ + int result = 0; + int running = add_request_to_list (newp, newp->aiocbp->aiocb.aio_fildes, + newp->aiocbp->aiocb.__abs_prio); + + if (running == yes) + { + /* We try to create a new thread for this file descriptor. The + function which gets called will handle all available requests + for this descriptor and when all are processed it will + terminate. + + If no new thread can be created or if the specified limit of + threads for AIO is reached we queue the request. */ + + /* See if we need to and are able to create a thread. */ + if (nthreads < optim.aio_threads && idle_thread_count == 0) + { + pthread_t thid; + + running = newp->running = allocated; + + /* Now try to start a thread. */ + if (aio_create_helper_thread (&thid, handle_fildes_io, newp) == 0) + /* We managed to enqueue the request. All errors which can + happen now can be recognized by calls to `aio_return' and + `aio_error'. */ + ++nthreads; + else + { + /* Reset the running flag. The new request is not running. */ + running = newp->running = yes; + + if (nthreads == 0) + /* We cannot create a thread in the moment and there is + also no thread running. This is a problem. `errno' is + set to EAGAIN if this is only a temporary problem. */ + result = -1; + } + } + } + + /* Enqueue the request in the run queue if it is not yet running. */ + if (running == yes && result == 0) + { + add_request_to_runlist (newp); + + /* If there is a thread waiting for work, then let it know that we + have just given it something to do. */ + if (idle_thread_count > 0) + pthread_cond_signal (&__aio_new_request_notification); + } + + if (result == 0) + newp->running = running; + return result; +} + +/* The main function of the async I/O handling. It enqueues requests + and if necessary starts and handles threads. */ +struct requestlist * +internal_function +__aio_enqueue_request_ctx (aiocb_union *aiocbp, int operation, kctx_t kctx) +{ + int policy, prio; + struct sched_param param; + struct requestlist *newp; + int op = (operation & 0xffff); + + if (op == LIO_SYNC || op == LIO_DSYNC) + { + aiocbp->aiocb.aio_reqprio = 0; + /* FIXME: Kernel doesn't support sync yet. */ + operation &= ~LIO_KTHREAD; + kctx = KCTX_NONE; + } + else if (aiocbp->aiocb.aio_reqprio < 0 + || aiocbp->aiocb.aio_reqprio > AIO_PRIO_DELTA_MAX) + { + /* Invalid priority value. */ + __set_errno (EINVAL); + aiocbp->aiocb.__error_code = EINVAL; + aiocbp->aiocb.__return_value = -1; + return NULL; + } + + if ((operation & LIO_KTHREAD) || kctx != KCTX_NONE) + { + /* io_* is only really asynchronous for O_DIRECT or /dev/raw*. */ + int fl = __fcntl (aiocbp->aiocb.aio_fildes, F_GETFL); + if (fl < 0 || (fl & O_DIRECT) == 0) + { + struct stat64 st; + if (__fxstat64 (_STAT_VER, aiocbp->aiocb.aio_fildes, &st) < 0 + || ! S_ISCHR (st.st_mode) + || major (st.st_rdev) != 162) + { + operation &= ~LIO_KTHREAD; + kctx = KCTX_NONE; + } + } + } + + /* Compute priority for this request. */ + pthread_getschedparam (pthread_self (), &policy, ¶m); + prio = param.sched_priority - aiocbp->aiocb.aio_reqprio; + + /* Get the mutex. */ + pthread_mutex_lock (&__aio_requests_mutex); + + if (operation & LIO_KTHREAD) + { + if (__aio_kioctx == KCTX_NONE && !__have_no_kernel_aio) + { + int res; + INTERNAL_SYSCALL_DECL (err); + + __aio_kioctx = 0; + do + res = INTERNAL_SYSCALL (io_setup, err, 2, 1024, &__aio_kioctx); + while (INTERNAL_SYSCALL_ERROR_P (res, err) + && INTERNAL_SYSCALL_ERRNO (res, err) == EINTR); + if (INTERNAL_SYSCALL_ERROR_P (res, err)) + { + __have_no_kernel_aio = 1; + __aio_kioctx = KCTX_NONE; + } + } + + kctx = __aio_kioctx; + + if (kctx != KCTX_NONE && !__kernel_thread_started + && ((operation & LIO_KTHREAD_REQUIRED) + || aiocbp->aiocb.aio_sigevent.sigev_notify != SIGEV_NONE)) + { + if (__aio_create_kernel_thread () < 0) + kctx = KCTX_NONE; + } + } + + /* Get a new element for the waiting list. */ + newp = get_elem (); + if (newp == NULL) + { + pthread_mutex_unlock (&__aio_requests_mutex); + __set_errno (EAGAIN); + return NULL; + } + newp->aiocbp = aiocbp; +#ifdef BROKEN_THREAD_SIGNALS + newp->caller_pid = (aiocbp->aiocb.aio_sigevent.sigev_notify == SIGEV_SIGNAL + ? getpid () : 0); +#endif + newp->waiting = NULL; + newp->kioctx = kctx; + + aiocbp->aiocb.__abs_prio = prio; + aiocbp->aiocb.__policy = policy; + aiocbp->aiocb.aio_lio_opcode = op; + aiocbp->aiocb.__error_code = EINPROGRESS; + aiocbp->aiocb.__return_value = 0; + + if (newp->kioctx != KCTX_NONE) + { + int res; + INTERNAL_SYSCALL_DECL (err); + + aiocb_union *aiocbp = newp->aiocbp; + struct kiocb *kiocbs[] __attribute__((unused)) = { &newp->kiocb }; + + newp->kiocb.kiocb_data = (uintptr_t) kernel_callback; + switch (op & 127) + { + case LIO_READ: newp->kiocb.kiocb_lio_opcode = IO_CMD_PREAD; break; + case LIO_WRITE: newp->kiocb.kiocb_lio_opcode = IO_CMD_PWRITE; break; + case LIO_SYNC: + case LIO_DSYNC: newp->kiocb.kiocb_lio_opcode = IO_CMD_FSYNC; break; + } + if (op & 128) + newp->kiocb.kiocb_offset = aiocbp->aiocb64.aio_offset; + else + newp->kiocb.kiocb_offset = aiocbp->aiocb.aio_offset; + newp->kiocb.kiocb_fildes = aiocbp->aiocb.aio_fildes; + newp->kiocb.kiocb_buf = (uintptr_t) aiocbp->aiocb.aio_buf; + newp->kiocb.kiocb_nbytes = aiocbp->aiocb.aio_nbytes; + /* FIXME. */ + newp->kiocb.kiocb_req_prio = 0; + res = INTERNAL_SYSCALL (io_submit, err, 3, newp->kioctx, 1, kiocbs); + if (! INTERNAL_SYSCALL_ERROR_P (res, err)) + { + newp->running = allocated; + add_request_to_list (newp, aiocbp->aiocb.aio_fildes, prio); + /* Release the mutex. */ + pthread_mutex_unlock (&__aio_requests_mutex); + return newp; + } + newp->kioctx = KCTX_NONE; + } + + if (__aio_enqueue_user_request (newp)) + { + /* Something went wrong. */ + __aio_free_request (newp); + newp = NULL; + } + + /* Release the mutex. */ + pthread_mutex_unlock (&__aio_requests_mutex); + + return newp; +} + + +static int +wait_for_kernel_requests (int fildes) +{ + pthread_mutex_lock (&__aio_requests_mutex); + + struct requestlist *kreq = __aio_find_kreq_fd (fildes), *req; + int nent = 0; + int ret = 0; + + req = kreq; + while (req) + { + if (req->running == allocated) + ++nent; + req = req->next_prio; + } + + if (nent) + { + if (__aio_create_kernel_thread () < 0) + { + pthread_mutex_unlock (&__aio_requests_mutex); + return -1; + } + +#ifndef DONT_NEED_AIO_MISC_COND + pthread_cond_t cond = PTHREAD_COND_INITIALIZER; +#endif + struct waitlist waitlist[nent]; + int cnt = 0; + + while (kreq) + { + if (kreq->running == allocated) + { +#ifndef DONT_NEED_AIO_MISC_COND + waitlist[cnt].cond = &cond; +#endif + waitlist[cnt].result = NULL; + waitlist[cnt].next = kreq->waiting; + waitlist[cnt].counterp = &nent; + waitlist[cnt].sigevp = NULL; +#ifdef BROKEN_THREAD_SIGNALS + waitlist[cnt].caller_pid = 0; /* Not needed. */ +#endif + kreq->waiting = &waitlist[cnt++]; + } + kreq = kreq->next_prio; + } + +#ifdef DONT_NEED_AIO_MISC_COND + AIO_MISC_WAIT (ret, nent, NULL, 0); +#else + do + pthread_cond_wait (&cond, &__aio_requests_mutex); + while (nent); + + pthread_cond_destroy (&cond); +#endif + } + + pthread_mutex_unlock (&__aio_requests_mutex); + return ret; +} + + +static void * +handle_fildes_io (void *arg) +{ + pthread_t self = pthread_self (); + struct sched_param param; + struct requestlist *runp = (struct requestlist *) arg; + aiocb_union *aiocbp; + int policy; + int fildes; + + pthread_getschedparam (self, &policy, ¶m); + + do + { + /* If runp is NULL, then we were created to service the work queue + in general, not to handle any particular request. In that case we + skip the "do work" stuff on the first pass, and go directly to the + "get work off the work queue" part of this loop, which is near the + end. */ + if (runp == NULL) + pthread_mutex_lock (&__aio_requests_mutex); + else + { + /* Hopefully this request is marked as running. */ + assert (runp->running == allocated); + + /* Update our variables. */ + aiocbp = runp->aiocbp; + fildes = aiocbp->aiocb.aio_fildes; + + /* Change the priority to the requested value (if necessary). */ + if (aiocbp->aiocb.__abs_prio != param.sched_priority + || aiocbp->aiocb.__policy != policy) + { + param.sched_priority = aiocbp->aiocb.__abs_prio; + policy = aiocbp->aiocb.__policy; + pthread_setschedparam (self, policy, ¶m); + } + + /* Process request pointed to by RUNP. We must not be disturbed + by signals. */ + if ((aiocbp->aiocb.aio_lio_opcode & 127) == LIO_READ) + { + if (aiocbp->aiocb.aio_lio_opcode & 128) + aiocbp->aiocb.__return_value = + TEMP_FAILURE_RETRY (__pread64 (fildes, (void *) + aiocbp->aiocb64.aio_buf, + aiocbp->aiocb64.aio_nbytes, + aiocbp->aiocb64.aio_offset)); + else + aiocbp->aiocb.__return_value = + TEMP_FAILURE_RETRY (pread (fildes, + (void *) aiocbp->aiocb.aio_buf, + aiocbp->aiocb.aio_nbytes, + aiocbp->aiocb.aio_offset)); + + if (aiocbp->aiocb.__return_value == -1 && errno == ESPIPE) + /* The Linux kernel is different from others. It returns + ESPIPE if using pread on a socket. Other platforms + simply ignore the offset parameter and behave like + read. */ + aiocbp->aiocb.__return_value = + TEMP_FAILURE_RETRY (read (fildes, + (void *) aiocbp->aiocb64.aio_buf, + aiocbp->aiocb64.aio_nbytes)); + } + else if ((aiocbp->aiocb.aio_lio_opcode & 127) == LIO_WRITE) + { + if (aiocbp->aiocb.aio_lio_opcode & 128) + aiocbp->aiocb.__return_value = + TEMP_FAILURE_RETRY (__pwrite64 (fildes, (const void *) + aiocbp->aiocb64.aio_buf, + aiocbp->aiocb64.aio_nbytes, + aiocbp->aiocb64.aio_offset)); + else + aiocbp->aiocb.__return_value = + TEMP_FAILURE_RETRY (__libc_pwrite (fildes, (const void *) + aiocbp->aiocb.aio_buf, + aiocbp->aiocb.aio_nbytes, + aiocbp->aiocb.aio_offset)); + + if (aiocbp->aiocb.__return_value == -1 && errno == ESPIPE) + /* The Linux kernel is different from others. It returns + ESPIPE if using pwrite on a socket. Other platforms + simply ignore the offset parameter and behave like + write. */ + aiocbp->aiocb.__return_value = + TEMP_FAILURE_RETRY (write (fildes, + (void *) aiocbp->aiocb64.aio_buf, + aiocbp->aiocb64.aio_nbytes)); + } + else if (aiocbp->aiocb.aio_lio_opcode == LIO_DSYNC + || aiocbp->aiocb.aio_lio_opcode == LIO_SYNC) + { + if (wait_for_kernel_requests (fildes) < 0) + { + aiocbp->aiocb.__return_value = -1; + __set_errno (ENOMEM); + } + else if (aiocbp->aiocb.aio_lio_opcode == LIO_DSYNC) + aiocbp->aiocb.__return_value = + TEMP_FAILURE_RETRY (fdatasync (fildes)); + else + aiocbp->aiocb.__return_value = + TEMP_FAILURE_RETRY (fsync (fildes)); + } + else + { + /* This is an invalid opcode. */ + aiocbp->aiocb.__return_value = -1; + __set_errno (EINVAL); + } + + /* Get the mutex. */ + pthread_mutex_lock (&__aio_requests_mutex); + + /* In theory we would need here a write memory barrier since the + callers test using aio_error() whether the request finished + and once this value != EINPROGRESS the field __return_value + must be committed to memory. + + But since the pthread_mutex_lock call involves write memory + barriers as well it is not necessary. */ + + if (aiocbp->aiocb.__return_value == -1) + aiocbp->aiocb.__error_code = errno; + else + aiocbp->aiocb.__error_code = 0; + + /* Send the signal to notify about finished processing of the + request. */ + __aio_notify (runp); + + /* For debugging purposes we reset the running flag of the + finished request. */ + assert (runp->running == allocated); + runp->running = done; + + /* Now dequeue the current request. */ + __aio_remove_request (NULL, runp, 0); + if (runp->next_prio != NULL) + add_request_to_runlist (runp->next_prio); + + /* Free the old element. */ + __aio_free_request (runp); + } + + runp = runlist; + + /* If the runlist is empty, then we sleep for a while, waiting for + something to arrive in it. */ + if (runp == NULL && optim.aio_idle_time >= 0) + { + struct timeval now; + struct timespec wakeup_time; + + ++idle_thread_count; + gettimeofday (&now, NULL); + wakeup_time.tv_sec = now.tv_sec + optim.aio_idle_time; + wakeup_time.tv_nsec = now.tv_usec * 1000; + if (wakeup_time.tv_nsec > 1000000000) + { + wakeup_time.tv_nsec -= 1000000000; + ++wakeup_time.tv_sec; + } + pthread_cond_timedwait (&__aio_new_request_notification, + &__aio_requests_mutex, + &wakeup_time); + --idle_thread_count; + runp = runlist; + } + + if (runp == NULL) + --nthreads; + else + { + assert (runp->running == yes); + runp->running = allocated; + runlist = runp->next_run; + + /* If we have a request to process, and there's still another in + the run list, then we need to either wake up or create a new + thread to service the request that is still in the run list. */ + if (runlist != NULL) + { + /* There are at least two items in the work queue to work on. + If there are other idle threads, then we should wake them + up for these other work elements; otherwise, we should try + to create a new thread. */ + if (idle_thread_count > 0) + pthread_cond_signal (&__aio_new_request_notification); + else if (nthreads < optim.aio_threads) + { + pthread_t thid; + + /* Now try to start a thread. If we fail, no big deal, + because we know that there is at least one thread (us) + that is working on AIO operations. */ + if (aio_create_helper_thread (&thid, handle_fildes_io, NULL) + == 0) + ++nthreads; + } + } + } + + /* Release the mutex. */ + pthread_mutex_unlock (&__aio_requests_mutex); + } + while (runp != NULL); + + return NULL; +} + + +/* Free allocated resources. */ +libc_freeres_fn (free_res) +{ + size_t row; + + for (row = 0; row < pool_max_size; ++row) + free (pool[row]); + + free (pool); +} + + +/* Add newrequest to the runlist. The __abs_prio flag of newrequest must + be correctly set to do this. Also, you had better set newrequest's + "running" flag to "yes" before you release your lock or you'll throw an + assertion. */ +static void +internal_function +add_request_to_runlist (struct requestlist *newrequest) +{ + int prio = newrequest->aiocbp->aiocb.__abs_prio; + struct requestlist *runp; + + if (runlist == NULL || runlist->aiocbp->aiocb.__abs_prio < prio) + { + newrequest->next_run = runlist; + runlist = newrequest; + } + else + { + runp = runlist; + + while (runp->next_run != NULL + && runp->next_run->aiocbp->aiocb.__abs_prio >= prio) + runp = runp->next_run; + + newrequest->next_run = runp->next_run; + runp->next_run = newrequest; + } +} +#endif diff --git a/rtkaio/sysdeps/unix/sysv/linux/kaio_misc.h b/rtkaio/sysdeps/unix/sysv/linux/kaio_misc.h new file mode 100644 index 0000000000..5e0ca19c31 --- /dev/null +++ b/rtkaio/sysdeps/unix/sysv/linux/kaio_misc.h @@ -0,0 +1,328 @@ +/* Copyright (C) 1997,1999,2000,2001,2002,2003,2006 + Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#ifndef _AIO_MISC_H + +#include <sysdep.h> + +#if !defined __NR_io_setup || !defined __NR_io_destroy \ + || !defined __NR_io_getevents || !defined __NR_io_submit \ + || !defined __NR_io_cancel + +#include <aio_misc.h> + +#else + +#define _AIO_MISC_H 1 +#define USE_KAIO 1 + +#include <aio.h> +#include <pthread.h> +#include <stdint.h> +#include <signal.h> +#include <sysdep.h> +#include <limits.h> + +#ifdef HAVE_FORCED_UNWIND + +/* We define a special synchronization primitive for AIO. POSIX + conditional variables would be ideal but the pthread_cond_*wait + operations do not return on EINTR. This is a requirement for + correct aio_suspend and lio_listio implementations. */ + +#include <assert.h> +#include <pthreadP.h> +#include <lowlevellock.h> + +# define DONT_NEED_AIO_MISC_COND 1 + +# define AIO_MISC_NOTIFY(waitlist) \ + do { \ + if (*waitlist->counterp > 0 && --*waitlist->counterp == 0) \ + lll_futex_wake (waitlist->counterp, 1); \ + } while (0) + +# define AIO_MISC_WAIT(result, futex, timeout, cancel) \ + do { \ + volatile int *futexaddr = &futex; \ + int oldval = futex; \ + \ + if (oldval != 0) \ + { \ + pthread_mutex_unlock (&__aio_requests_mutex); \ + \ + int oldtype; \ + if (cancel) \ + oldtype = LIBC_CANCEL_ASYNC (); \ + \ + int status; \ + do \ + { \ + status = lll_futex_timed_wait (futexaddr, oldval, timeout); \ + if (status != -EWOULDBLOCK) \ + break; \ + \ + oldval = *futexaddr; \ + } \ + while (oldval != 0); \ + \ + if (cancel) \ + LIBC_CANCEL_RESET (oldtype); \ + \ + if (status == -EINTR) \ + result = EINTR; \ + else if (status == -ETIMEDOUT) \ + result = EAGAIN; \ + else \ + assert (status == 0 || status == -EWOULDBLOCK); \ + \ + pthread_mutex_lock (&__aio_requests_mutex); \ + } \ + } while (0) + +#endif + +typedef unsigned long kctx_t; +#define KCTX_NONE ~0UL +extern kctx_t __aio_kioctx; + +enum +{ + IO_CMD_PREAD, + IO_CMD_PWRITE, + IO_CMD_FSYNC, + IO_CMD_FDSYNC, + IO_CMD_PREADX, + IO_CMD_POLL +}; + +struct kiocb +{ + uint64_t kiocb_data; + uint64_t kiocb_key; + uint16_t kiocb_lio_opcode; + int16_t kiocb_req_prio; + uint32_t kiocb_fildes; + uint64_t kiocb_buf; + uint64_t kiocb_nbytes; + int64_t kiocb_offset; + int64_t __pad3, __pad4; +}; + +struct kio_event +{ + uint64_t kioe_data; + uint64_t kioe_obj; + int64_t kioe_res; + int64_t kioe_res2; +}; + +/* Extend the operation enum. */ +enum +{ + LIO_DSYNC = LIO_NOP + 1, + LIO_SYNC, + LIO_READ64 = LIO_READ | 128, + LIO_WRITE64 = LIO_WRITE | 128, + LIO_KTHREAD = 0x10000, + LIO_KTHREAD_REQUIRED = 0x20000 +}; + + +/* Union of the two request types. */ +typedef union + { + struct aiocb aiocb; + struct aiocb64 aiocb64; + } aiocb_union; + + +/* Used to synchronize. */ +struct waitlist + { + struct waitlist *next; + + /* The next two fields is used in synchronous io_listio' operations. */ +#ifndef DONT_NEED_AIO_MISC_COND + pthread_cond_t *cond; +#endif + int *result; + + volatile int *counterp; + /* The next field is used in asynchronous `lio_listio' operations. */ + struct sigevent *sigevp; +#ifdef BROKEN_THREAD_SIGNALS + /* XXX See requestlist, it's used to work around the broken signal + handling in Linux. */ + pid_t caller_pid; +#endif + }; + + +/* Status of a request. */ +enum +{ + no, + queued, + yes, + allocated, + done +}; + + +/* Used to queue requests.. */ +struct requestlist + { + struct kiocb kiocb; + kctx_t kioctx; + + int running; + + struct requestlist *last_fd; + struct requestlist *next_fd; + struct requestlist *next_prio; + struct requestlist *next_run; + /* For kioctx != KCTX_NONE requests we are doubly linked. */ +#define prev_prio next_run + + /* Pointer to the actual data. */ + aiocb_union *aiocbp; + +#ifdef BROKEN_THREAD_SIGNALS + /* PID of the initiator thread. + XXX This is only necessary for the broken signal handling on Linux. */ + pid_t caller_pid; +#endif + + /* List of waiting processes. */ + struct waitlist *waiting; + }; + + +/* Lock for global I/O list of requests. */ +extern pthread_mutex_t __aio_requests_mutex attribute_hidden; + + +/* Enqueue request. */ +extern struct requestlist *__aio_enqueue_request_ctx (aiocb_union *aiocbp, + int operation, + kctx_t kctx) + attribute_hidden internal_function; + +#define __aio_enqueue_request(aiocbp, operation) \ + __aio_enqueue_request_ctx (aiocbp, operation | LIO_KTHREAD, KCTX_NONE) + +/* Find request entry for given AIO control block. */ +extern struct requestlist *__aio_find_req (aiocb_union *elem) + attribute_hidden internal_function; + +/* Find request entry for given file descriptor. */ +extern struct requestlist *__aio_find_req_fd (int fildes) + attribute_hidden internal_function; + +/* Find request entry for given file descriptor. */ +extern struct requestlist *__aio_find_kreq_fd (int fildes) + attribute_hidden internal_function; + +/* Remove request from the list. */ +extern void __aio_remove_request (struct requestlist *last, + struct requestlist *req, int all) + attribute_hidden internal_function; + +extern void __aio_remove_krequest (struct requestlist *req) + attribute_hidden internal_function; + +/* Release the entry for the request. */ +extern void __aio_free_request (struct requestlist *req) + attribute_hidden internal_function; + +/* Notify initiator of request and tell this everybody listening. */ +extern void __aio_notify (struct requestlist *req) + attribute_hidden internal_function; + +/* Notify initiator of request. */ +#ifdef BROKEN_THREAD_SIGNALS +extern int __aio_notify_only (struct sigevent *sigev, pid_t caller_pid) + attribute_hidden internal_function; +#else +extern int __aio_notify_only (struct sigevent *sigev) + attribute_hidden internal_function; +#endif + +/* Send the signal. */ +extern int __aio_sigqueue (int sig, const union sigval val, pid_t caller_pid) + attribute_hidden internal_function; + +extern int __aio_wait_for_events (kctx_t kctx, const struct timespec *timeout) + attribute_hidden internal_function; + +extern void __aio_read_one_event (void) attribute_hidden internal_function; + +extern int __aio_create_kernel_thread (void) + attribute_hidden internal_function; + +extern int __have_no_kernel_aio attribute_hidden; +extern int __kernel_thread_started attribute_hidden; + +#ifndef BROKEN_THREAD_SIGNALS +# define aio_start_notify_thread __aio_start_notify_thread +# define aio_create_helper_thread __aio_create_helper_thread + +extern inline void +__aio_start_notify_thread (void) +{ + sigset_t ss; + sigemptyset (&ss); + INTERNAL_SYSCALL_DECL (err); + INTERNAL_SYSCALL (rt_sigprocmask, err, 4, SIG_SETMASK, &ss, NULL, _NSIG / 8); +} + +extern inline int +__aio_create_helper_thread (pthread_t *threadp, void *(*tf) (void *), void *arg) +{ + pthread_attr_t attr; + + /* Make sure the thread is created detached. */ + pthread_attr_init (&attr); + pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); + + /* The helper thread needs only very little resources. */ + (void) pthread_attr_setstacksize (&attr, PTHREAD_STACK_MIN); + + /* Block all signals in the helper thread. To do this thoroughly we + temporarily have to block all signals here. */ + sigset_t ss; + sigset_t oss; + sigfillset (&ss); + INTERNAL_SYSCALL_DECL (err); + INTERNAL_SYSCALL (rt_sigprocmask, err, 4, SIG_SETMASK, &ss, &oss, _NSIG / 8); + + int ret = pthread_create (threadp, &attr, tf, arg); + + /* Restore the signal mask. */ + INTERNAL_SYSCALL (rt_sigprocmask, err, 4, SIG_SETMASK, &oss, NULL, + _NSIG / 8); + + (void) pthread_attr_destroy (&attr); + return ret; +} +#endif + +#endif +#endif /* aio_misc.h */ diff --git a/rtkaio/sysdeps/unix/sysv/linux/kaio_notify.c b/rtkaio/sysdeps/unix/sysv/linux/kaio_notify.c new file mode 100644 index 0000000000..8b03909bc4 --- /dev/null +++ b/rtkaio/sysdeps/unix/sysv/linux/kaio_notify.c @@ -0,0 +1,2 @@ +#include <kaio_misc.h> +#include <aio_notify.c> diff --git a/rtkaio/sysdeps/unix/sysv/linux/kaio_read.c b/rtkaio/sysdeps/unix/sysv/linux/kaio_read.c new file mode 100644 index 0000000000..0c5db34879 --- /dev/null +++ b/rtkaio/sysdeps/unix/sysv/linux/kaio_read.c @@ -0,0 +1,2 @@ +#include <kaio_misc.h> +#include <aio_read.c> diff --git a/rtkaio/sysdeps/unix/sysv/linux/kaio_read64.c b/rtkaio/sysdeps/unix/sysv/linux/kaio_read64.c new file mode 100644 index 0000000000..62db3d45bd --- /dev/null +++ b/rtkaio/sysdeps/unix/sysv/linux/kaio_read64.c @@ -0,0 +1,2 @@ +#include <kaio_misc.h> +#include <aio_read64.c> diff --git a/rtkaio/sysdeps/unix/sysv/linux/kaio_return.c b/rtkaio/sysdeps/unix/sysv/linux/kaio_return.c new file mode 100644 index 0000000000..1d9f6cbabb --- /dev/null +++ b/rtkaio/sysdeps/unix/sysv/linux/kaio_return.c @@ -0,0 +1,50 @@ +/* Return exit value of asynchronous I/O request. + Copyright (C) 1997, 2002, 2003 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + + +/* We use an UGLY hack to prevent gcc from finding us cheating. The + implementation of aio_return and aio_return64 are identical and so + we want to avoid code duplication by using aliases. But gcc sees + the different parameter lists and prints a warning. We define here + a function so that aio_return64 has no prototype. */ +#define aio_return64 XXX +#include <aio.h> +/* And undo the hack. */ +#undef aio_return64 + +#include <kaio_misc.h> + +#ifndef USE_KAIO +#include <aio_return.c> +#else + +#include <errno.h> + +ssize_t +aio_return (aiocbp) + struct aiocb *aiocbp; +{ + if (aiocbp->__error_code == EINPROGRESS) + __aio_read_one_event (); + return aiocbp->__return_value; +} + +weak_alias (aio_return, aio_return64) +#endif diff --git a/rtkaio/sysdeps/unix/sysv/linux/kaio_sigqueue.c b/rtkaio/sysdeps/unix/sysv/linux/kaio_sigqueue.c new file mode 100644 index 0000000000..3a5c5efb0d --- /dev/null +++ b/rtkaio/sysdeps/unix/sysv/linux/kaio_sigqueue.c @@ -0,0 +1,2 @@ +#include <kaio_misc.h> +#include <aio_sigqueue.c> diff --git a/rtkaio/sysdeps/unix/sysv/linux/kaio_suspend.c b/rtkaio/sysdeps/unix/sysv/linux/kaio_suspend.c new file mode 100644 index 0000000000..2400c5223c --- /dev/null +++ b/rtkaio/sysdeps/unix/sysv/linux/kaio_suspend.c @@ -0,0 +1,327 @@ +/* Suspend until termination of a requests. + Copyright (C) 1997, 1998, 1999, 2000, 2002, 2003, 2006 + Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + + +/* We use an UGLY hack to prevent gcc from finding us cheating. The + implementations of aio_suspend and aio_suspend64 are identical and so + we want to avoid code duplication by using aliases. But gcc sees + the different parameter lists and prints a warning. We define here + a function so that aio_suspend64 has no prototype. */ +#define aio_suspend64 XXX +#include <aio.h> +/* And undo the hack. */ +#undef aio_suspend64 + +#include <kaio_misc.h> + +#ifndef USE_KAIO +#include <aio_suspend.c> +#else + +#include <assert.h> +#include <errno.h> +#include <stdbool.h> +#include <stdlib.h> +#include <sys/time.h> + +#include <bits/libc-lock.h> +#include <sysdep-cancel.h> + + +struct clparam +{ + const struct aiocb *const *list; + struct waitlist *waitlist; + struct requestlist **requestlist; +#ifndef DONT_NEED_AIO_MISC_COND + pthread_cond_t *cond; +#endif + int nent; +}; + + +static void +cleanup (void *arg) +{ +#ifdef DONT_NEED_AIO_MISC_COND + /* Acquire the mutex. If pthread_cond_*wait is used this would + happen implicitly. */ + pthread_mutex_lock (&__aio_requests_mutex); +#endif + + const struct clparam *param = (const struct clparam *) arg; + + /* Now remove the entry in the waiting list for all requests + which didn't terminate. */ + int cnt = param->nent; + while (cnt-- > 0) + if (param->list[cnt] != NULL + && param->list[cnt]->__error_code == EINPROGRESS) + { + struct waitlist **listp; + + assert (param->requestlist[cnt] != NULL); + + /* There is the chance that we cannot find our entry anymore. This + could happen if the request terminated and restarted again. */ + listp = ¶m->requestlist[cnt]->waiting; + while (*listp != NULL && *listp != ¶m->waitlist[cnt]) + listp = &(*listp)->next; + + if (*listp != NULL) + *listp = (*listp)->next; + } + +#ifndef DONT_NEED_AIO_MISC_COND + /* Release the conditional variable. */ + (void) pthread_cond_destroy (param->cond); +#endif + + /* Release the mutex. */ + pthread_mutex_unlock (&__aio_requests_mutex); +} + + +int +aio_suspend (list, nent, timeout) + const struct aiocb *const list[]; + int nent; + const struct timespec *timeout; +{ + if (__builtin_expect (nent < 0, 0)) + { + __set_errno (EINVAL); + return -1; + } + + struct waitlist waitlist[nent]; + struct requestlist *requestlist[nent]; +#ifndef DONT_NEED_AIO_MISC_COND + pthread_cond_t cond = PTHREAD_COND_INITIALIZER; +#endif + int cnt; + int result = 0; + int cntr = 1; + int total = 0, ktotal = 0; + + /* Request the mutex. */ + pthread_mutex_lock (&__aio_requests_mutex); + + /* There is not yet a finished request. Signal the request that + we are working for it. */ + for (cnt = 0; cnt < nent; ++cnt) + if (list[cnt] != NULL) + { + if (list[cnt]->__error_code == EINPROGRESS) + { + requestlist[cnt] = __aio_find_req ((aiocb_union *) list[cnt]); + + if (requestlist[cnt] != NULL) + { +#ifndef DONT_NEED_AIO_MISC_COND + waitlist[cnt].cond = &cond; +#endif + waitlist[cnt].result = NULL; + waitlist[cnt].next = requestlist[cnt]->waiting; + waitlist[cnt].counterp = &cntr; + waitlist[cnt].sigevp = NULL; +#ifdef BROKEN_THREAD_SIGNALS + waitlist[cnt].caller_pid = 0; /* Not needed. */ +#endif + requestlist[cnt]->waiting = &waitlist[cnt]; + total++; + if (requestlist[cnt]->kioctx != KCTX_NONE) + ktotal++; + } + else + /* We will never suspend. */ + break; + } + else + /* We will never suspend. */ + break; + } + + + /* Only if none of the entries is NULL or finished to be wait. */ + if (cnt == nent && total) + { + struct clparam clparam = + { + .list = list, + .waitlist = waitlist, + .requestlist = requestlist, +#ifndef DONT_NEED_AIO_MISC_COND + .cond = &cond, +#endif + .nent = nent + }; + + pthread_cleanup_push (cleanup, &clparam); + + if (!__kernel_thread_started && ktotal) + { + /* If the kernel aio thread was not started yet all requests + are served by the kernel and there are no other threads running, + read events with mutex hold, so that nobody else can get them + instead of us here. */ + if (SINGLE_THREAD_P && total == ktotal) + { + if (timeout == NULL) + { + while (cntr == 1) + __aio_wait_for_events (__aio_kioctx, NULL); + } + else + { + struct timeval now; + struct timespec abstime, ts; + + __gettimeofday (&now, NULL); + abstime.tv_nsec = timeout->tv_nsec + now.tv_usec * 1000; + abstime.tv_sec = timeout->tv_sec + now.tv_sec; + if (abstime.tv_nsec >= 1000000000) + { + abstime.tv_nsec -= 1000000000; + abstime.tv_sec += 1; + } + + for (;;) + { + result = __aio_wait_for_events (__aio_kioctx, timeout); + if (cntr < 1) + break; + if (result == ETIMEDOUT) + break; + + __gettimeofday (&now, NULL); + if (now.tv_sec > abstime.tv_sec + || (now.tv_sec == abstime.tv_sec + && now.tv_usec * 1000 >= abstime.tv_nsec)) + break; + + ts.tv_nsec = abstime.tv_nsec - now.tv_usec * 1000; + ts.tv_sec = abstime.tv_sec - now.tv_sec; + if (abstime.tv_nsec < now.tv_usec * 1000) + { + ts.tv_nsec += 1000000000; + ts.tv_sec -= 1; + } + timeout = &ts; + } + + if (cntr < 1) + result = 0; + else + result = ETIMEDOUT; + } + total = 0; + } + else if (__aio_create_kernel_thread () < 0) + { + total = 0; + __set_errno (ENOMEM); + result = -1; + } + } + + if (total == 0) + /* Suspending was handled above. */ + ; +#ifdef DONT_NEED_AIO_MISC_COND + else + AIO_MISC_WAIT (result, cntr, timeout, 1); +#else + else if (timeout == NULL) + result = pthread_cond_wait (&cond, &__aio_requests_mutex); + else + { + /* We have to convert the relative timeout value into an + absolute time value with pthread_cond_timedwait expects. */ + struct timeval now; + struct timespec abstime; + + __gettimeofday (&now, NULL); + abstime.tv_nsec = timeout->tv_nsec + now.tv_usec * 1000; + abstime.tv_sec = timeout->tv_sec + now.tv_sec; + if (abstime.tv_nsec >= 1000000000) + { + abstime.tv_nsec -= 1000000000; + abstime.tv_sec += 1; + } + + result = pthread_cond_timedwait (&cond, &__aio_requests_mutex, + &abstime); + } +#endif + + pthread_cleanup_pop (0); + } + + /* Now remove the entry in the waiting list for all requests + which didn't terminate. */ + while (cnt-- > 0) + if (list[cnt] != NULL && list[cnt]->__error_code == EINPROGRESS) + { + struct waitlist **listp; + + assert (requestlist[cnt] != NULL); + + /* There is the chance that we cannot find our entry anymore. This + could happen if the request terminated and restarted again. */ + listp = &requestlist[cnt]->waiting; + while (*listp != NULL && *listp != &waitlist[cnt]) + listp = &(*listp)->next; + + if (*listp != NULL) + *listp = (*listp)->next; + } + +#ifndef DONT_NEED_AIO_MISC_COND + /* Release the conditional variable. */ + if (__builtin_expect (pthread_cond_destroy (&cond) != 0, 0)) + /* This must never happen. */ + abort (); +#endif + + if (result != 0) + { +#ifndef DONT_NEED_AIO_MISC_COND + /* An error occurred. Possibly it's ETIMEDOUT. We have to translate + the timeout error report of `pthread_cond_timedwait' to the + form expected from `aio_suspend'. */ + if (result == ETIMEDOUT) + __set_errno (EAGAIN); + else +#endif + __set_errno (result); + + result = -1; + } + + /* Release the mutex. */ + pthread_mutex_unlock (&__aio_requests_mutex); + + return result; +} + +weak_alias (aio_suspend, aio_suspend64) +#endif diff --git a/rtkaio/sysdeps/unix/sysv/linux/kaio_write.c b/rtkaio/sysdeps/unix/sysv/linux/kaio_write.c new file mode 100644 index 0000000000..96863b2cdd --- /dev/null +++ b/rtkaio/sysdeps/unix/sysv/linux/kaio_write.c @@ -0,0 +1,2 @@ +#include <kaio_misc.h> +#include <aio_write.c> diff --git a/rtkaio/sysdeps/unix/sysv/linux/kaio_write64.c b/rtkaio/sysdeps/unix/sysv/linux/kaio_write64.c new file mode 100644 index 0000000000..1fa7121dfd --- /dev/null +++ b/rtkaio/sysdeps/unix/sysv/linux/kaio_write64.c @@ -0,0 +1,2 @@ +#include <kaio_misc.h> +#include <aio_write64.c> diff --git a/rtkaio/sysdeps/unix/sysv/linux/klio_listio.c b/rtkaio/sysdeps/unix/sysv/linux/klio_listio.c new file mode 100644 index 0000000000..b7676c9f03 --- /dev/null +++ b/rtkaio/sysdeps/unix/sysv/linux/klio_listio.c @@ -0,0 +1,322 @@ +/* Enqueue and list of read or write requests. + Copyright (C) 1997,1998,1999,2000,2001,2002,2003,2005,2006 + Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <kaio_misc.h> + +#ifndef USE_KAIO +#include <lio_listio.c> +#else + +#ifndef lio_listio +#include <aio.h> +#include <assert.h> +#include <errno.h> +#include <stdlib.h> +#include <unistd.h> + +#define LIO_OPCODE_BASE 0 +#endif + +#include <shlib-compat.h> + + +/* We need this special structure to handle asynchronous I/O. */ +struct async_waitlist + { + int counter; + struct sigevent sigev; + struct waitlist list[0]; + }; + + +/* The code in glibc 2.1 to glibc 2.4 issued only one event when all + requests submitted with lio_listio finished. The existing practice + is to issue events for the individual requests as well. This is + what the new code does. */ +#if SHLIB_COMPAT (librt, GLIBC_2_1, GLIBC_2_4) +# define LIO_MODE(mode) ((mode) & 127) +# define NO_INDIVIDUAL_EVENT_P(mode) ((mode) & 128) +#else +# define LIO_MODE(mode) mode +# define NO_INDIVIDUAL_EVENT_P(mode) 0 +#endif + + +static int +lio_listio_internal (int mode, struct aiocb *const list[], int nent, + struct sigevent *sig) +{ + struct sigevent defsigev; + struct requestlist *requests[nent]; + int cnt; + volatile int total = 0; + int result = 0, op = 0; + kctx_t kctx = KCTX_NONE; + + if (sig == NULL) + { + defsigev.sigev_notify = SIGEV_NONE; + sig = &defsigev; + } + + /* Request the mutex. */ + pthread_mutex_lock (&__aio_requests_mutex); + + if (LIO_MODE (mode) == LIO_WAIT && ! __have_no_kernel_aio && nent > 0) + { + int res; + INTERNAL_SYSCALL_DECL (err); + + kctx = 0; + do + res = INTERNAL_SYSCALL (io_setup, err, 2, nent, &kctx); + while (INTERNAL_SYSCALL_ERROR_P (res, err) + && INTERNAL_SYSCALL_ERRNO (res, err) == EINTR); + if (INTERNAL_SYSCALL_ERROR_P (res, err)) + { + kctx = KCTX_NONE; + if (INTERNAL_SYSCALL_ERRNO (res, err) == ENOSYS) + __have_no_kernel_aio = 1; + } + } + else if (LIO_MODE (mode) == LIO_NOWAIT) + { + op = LIO_KTHREAD; + if (sig->sigev_notify != SIGEV_NONE) + op = LIO_KTHREAD | LIO_KTHREAD_REQUIRED; + } + op |= LIO_OPCODE_BASE; + + /* Now we can enqueue all requests. Since we already acquired the + mutex the enqueue function need not do this. */ + for (cnt = 0; cnt < nent; ++cnt) + if (list[cnt] != NULL && list[cnt]->aio_lio_opcode != LIO_NOP) + { + if (NO_INDIVIDUAL_EVENT_P (mode)) + list[cnt]->aio_sigevent.sigev_notify = SIGEV_NONE; + requests[cnt] + = __aio_enqueue_request_ctx ((aiocb_union *) list[cnt], + list[cnt]->aio_lio_opcode | op, + kctx); + + if (requests[cnt] != NULL) + /* Successfully enqueued. */ + ++total; + else + /* Signal that we've seen an error. `errno' and the error code + of the aiocb will tell more. */ + result = -1; + } + else + requests[cnt] = NULL; + + if (total == 0) + { + /* We don't have anything to do except signalling if we work + asynchronously. */ + + if (kctx != KCTX_NONE) + { + INTERNAL_SYSCALL_DECL (err); + INTERNAL_SYSCALL (io_destroy, err, 1, kctx); + } + + /* Release the mutex. We do this before raising a signal since the + signal handler might do a `siglongjmp' and then the mutex is + locked forever. */ + pthread_mutex_unlock (&__aio_requests_mutex); + + if (LIO_MODE (mode) == LIO_NOWAIT) + { +#ifdef BROKEN_THREAD_SIGNALS + __aio_notify_only (sig, + sig->sigev_notify == SIGEV_SIGNAL ? getpid () : 0); +#else + __aio_notify_only (sig); +#endif + } + + return result; + } + else if (LIO_MODE (mode) == LIO_WAIT) + { +#ifndef DONT_NEED_AIO_MISC_COND + pthread_cond_t cond = PTHREAD_COND_INITIALIZER; + int oldstate; +#endif + struct waitlist waitlist[nent]; + volatile int ktotal = 0; + + total = 0; + for (cnt = 0; cnt < nent; ++cnt) + { + assert (requests[cnt] == NULL || list[cnt] != NULL); + + if (requests[cnt] != NULL && list[cnt]->aio_lio_opcode != LIO_NOP) + { + if (requests[cnt]->kioctx != KCTX_NONE) + { + assert (requests[cnt]->kioctx == kctx); + waitlist[cnt].counterp = &ktotal; + ++ktotal; + } + else + { + waitlist[cnt].counterp = &total; + ++total; + } +#ifndef DONT_NEED_AIO_MISC_COND + waitlist[cnt].cond = &cond; +#endif + waitlist[cnt].result = &result; + waitlist[cnt].next = requests[cnt]->waiting; + waitlist[cnt].sigevp = NULL; +#ifdef BROKEN_THREAD_SIGNALS + waitlist[cnt].caller_pid = 0; /* Not needed. */ +#endif + requests[cnt]->waiting = &waitlist[cnt]; + } + } + + while (ktotal > 0) + __aio_wait_for_events (kctx, NULL); +#ifdef DONT_NEED_AIO_MISC_COND + AIO_MISC_WAIT (result, total, NULL, 0); +#else + /* Since `pthread_cond_wait'/`pthread_cond_timedwait' are cancellation + points we must be careful. We added entries to the waiting lists + which we must remove. So defer cancellation for now. */ + pthread_setcancelstate (PTHREAD_CANCEL_DISABLE, &oldstate); + + while (total > 0) + pthread_cond_wait (&cond, &__aio_requests_mutex); + + /* Now it's time to restore the cancellation state. */ + pthread_setcancelstate (oldstate, NULL); + + /* Release the conditional variable. */ + if (pthread_cond_destroy (&cond) != 0) + /* This must never happen. */ + abort (); +#endif + + if (kctx != KCTX_NONE) + { + INTERNAL_SYSCALL_DECL (err); + INTERNAL_SYSCALL (io_destroy, err, 1, kctx); + } + + /* If any of the I/O requests failed, return -1 and set errno. */ + if (result != 0) + { + __set_errno (result == EINTR ? EINTR : EIO); + result = -1; + } + } + else if (sig->sigev_notify != SIGEV_NONE) + { + struct async_waitlist *waitlist; + + waitlist = (struct async_waitlist *) + malloc (sizeof (struct async_waitlist) + + (nent * sizeof (struct waitlist))); + + if (waitlist == NULL) + { + __set_errno (EAGAIN); + result = -1; + } + else + { +#ifdef BROKEN_THREAD_SIGNALS + pid_t caller_pid = sig->sigev_notify == SIGEV_SIGNAL ? getpid () : 0; +#endif + total = 0; + + for (cnt = 0; cnt < nent; ++cnt) + { + assert (requests[cnt] == NULL || list[cnt] != NULL); + + if (requests[cnt] != NULL + && list[cnt]->aio_lio_opcode != LIO_NOP) + { +#ifndef DONT_NEED_AIO_MISC_COND + waitlist->list[cnt].cond = NULL; +#endif + waitlist->list[cnt].result = NULL; + waitlist->list[cnt].next = requests[cnt]->waiting; + waitlist->list[cnt].counterp = &waitlist->counter; + waitlist->list[cnt].sigevp = &waitlist->sigev; +#ifdef BROKEN_THREAD_SIGNALS + waitlist->list[cnt].caller_pid = caller_pid; +#endif + requests[cnt]->waiting = &waitlist->list[cnt]; + ++total; + } + } + + waitlist->counter = total; + waitlist->sigev = *sig; + } + } + + /* Release the mutex. */ + pthread_mutex_unlock (&__aio_requests_mutex); + + return result; +} + + +#if SHLIB_COMPAT (librt, GLIBC_2_1, GLIBC_2_4) +int +attribute_compat_text_section +__lio_listio_21 (int mode, struct aiocb *const list[], int nent, + struct sigevent *sig) +{ + /* Check arguments. */ + if (mode != LIO_WAIT && mode != LIO_NOWAIT) + { + __set_errno (EINVAL); + return -1; + } + + return lio_listio_internal (mode | LIO_NO_INDIVIDUAL_EVENT, list, nent, sig); +} +compat_symbol (librt, __lio_listio_21, lio_listio, GLIBC_2_1); +#endif + + +int +__lio_listio_item_notify (int mode, struct aiocb *const list[], int nent, + struct sigevent *sig) +{ + /* Check arguments. */ + if (mode != LIO_WAIT && mode != LIO_NOWAIT) + { + __set_errno (EINVAL); + return -1; + } + + return lio_listio_internal (mode, list, nent, sig); +} +versioned_symbol (librt, __lio_listio_item_notify, lio_listio, GLIBC_2_4); + +#endif diff --git a/rtkaio/sysdeps/unix/sysv/linux/klio_listio64.c b/rtkaio/sysdeps/unix/sysv/linux/klio_listio64.c new file mode 100644 index 0000000000..937cf1a9f0 --- /dev/null +++ b/rtkaio/sysdeps/unix/sysv/linux/klio_listio64.c @@ -0,0 +1,40 @@ +/* Enqueue and list of read or write requests, 64bit offset version. + Copyright (C) 1997, 1998, 1999, 2003, 2006 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <kaio_misc.h> + +#ifndef USE_KAIO +#include <lio_listio64.c> +#else + +#include <aio.h> +#include <assert.h> +#include <errno.h> +#include <stdlib.h> +#include <unistd.h> + +#define lio_listio lio_listio64 +#define __lio_listio_21 __lio_listio64_21 +#define __lio_listio_item_notify __lio_listio64_item_notify +#define aiocb aiocb64 +#define LIO_OPCODE_BASE 128 +#include <klio_listio.c> + +#endif diff --git a/rtkaio/sysdeps/unix/sysv/linux/powerpc/Makefile b/rtkaio/sysdeps/unix/sysv/linux/powerpc/Makefile new file mode 100644 index 0000000000..ead21fb111 --- /dev/null +++ b/rtkaio/sysdeps/unix/sysv/linux/powerpc/Makefile @@ -0,0 +1,3 @@ +ifeq ($(subdir),rtkaio) +librtkaio-routines += rtkaio-sysdep +endif diff --git a/rtkaio/sysdeps/unix/sysv/linux/powerpc/powerpc64/Versions b/rtkaio/sysdeps/unix/sysv/linux/powerpc/powerpc64/Versions new file mode 100644 index 0000000000..7443c81d6a --- /dev/null +++ b/rtkaio/sysdeps/unix/sysv/linux/powerpc/powerpc64/Versions @@ -0,0 +1,9 @@ +%ifdef HAVE_FORCED_UNWIND +librtkaio { + GLIBC_2.3.3 { + # Changed timer_t. + timer_create; timer_delete; timer_getoverrun; timer_gettime; + timer_settime; + } +} +%endif diff --git a/rtkaio/sysdeps/unix/sysv/linux/powerpc/rtkaio-sysdep.c b/rtkaio/sysdeps/unix/sysv/linux/powerpc/rtkaio-sysdep.c new file mode 100644 index 0000000000..ff0440aa83 --- /dev/null +++ b/rtkaio/sysdeps/unix/sysv/linux/powerpc/rtkaio-sysdep.c @@ -0,0 +1 @@ +#include <rt-sysdep.c> diff --git a/rtkaio/sysdeps/unix/sysv/linux/s390/Makefile b/rtkaio/sysdeps/unix/sysv/linux/s390/Makefile new file mode 100644 index 0000000000..ead21fb111 --- /dev/null +++ b/rtkaio/sysdeps/unix/sysv/linux/s390/Makefile @@ -0,0 +1,3 @@ +ifeq ($(subdir),rtkaio) +librtkaio-routines += rtkaio-sysdep +endif diff --git a/rtkaio/sysdeps/unix/sysv/linux/s390/rtkaio-sysdep.S b/rtkaio/sysdeps/unix/sysv/linux/s390/rtkaio-sysdep.S new file mode 100644 index 0000000000..11ee214b23 --- /dev/null +++ b/rtkaio/sysdeps/unix/sysv/linux/s390/rtkaio-sysdep.S @@ -0,0 +1 @@ +#include <rt-sysdep.S> diff --git a/rtkaio/sysdeps/unix/sysv/linux/s390/s390-64/Versions b/rtkaio/sysdeps/unix/sysv/linux/s390/s390-64/Versions new file mode 100644 index 0000000000..7443c81d6a --- /dev/null +++ b/rtkaio/sysdeps/unix/sysv/linux/s390/s390-64/Versions @@ -0,0 +1,9 @@ +%ifdef HAVE_FORCED_UNWIND +librtkaio { + GLIBC_2.3.3 { + # Changed timer_t. + timer_create; timer_delete; timer_getoverrun; timer_gettime; + timer_settime; + } +} +%endif diff --git a/rtkaio/sysdeps/unix/sysv/linux/sparc/Makefile b/rtkaio/sysdeps/unix/sysv/linux/sparc/Makefile new file mode 100644 index 0000000000..ead21fb111 --- /dev/null +++ b/rtkaio/sysdeps/unix/sysv/linux/sparc/Makefile @@ -0,0 +1,3 @@ +ifeq ($(subdir),rtkaio) +librtkaio-routines += rtkaio-sysdep +endif diff --git a/rtkaio/sysdeps/unix/sysv/linux/sparc/Versions b/rtkaio/sysdeps/unix/sysv/linux/sparc/Versions new file mode 100644 index 0000000000..b2d59a9140 --- /dev/null +++ b/rtkaio/sysdeps/unix/sysv/linux/sparc/Versions @@ -0,0 +1,6 @@ +librtkaio { + GLIBC_2.3 { + # AIO functions. + aio_cancel; aio_cancel64; + } +} diff --git a/rtkaio/sysdeps/unix/sysv/linux/sparc/kaio_cancel.c b/rtkaio/sysdeps/unix/sysv/linux/sparc/kaio_cancel.c new file mode 100644 index 0000000000..6e345e1643 --- /dev/null +++ b/rtkaio/sysdeps/unix/sysv/linux/sparc/kaio_cancel.c @@ -0,0 +1,33 @@ +#include <shlib-compat.h> + +#define aio_cancel64 XXX +#include <aio.h> +#undef aio_cancel64 +#include <errno.h> + +extern __typeof (aio_cancel) __new_aio_cancel; +extern __typeof (aio_cancel) __old_aio_cancel; + +#define aio_cancel __new_aio_cancel + +#include <sysdeps/unix/sysv/linux/kaio_cancel.c> + +#undef aio_cancel +strong_alias (__new_aio_cancel, __new_aio_cancel64); +versioned_symbol (librt, __new_aio_cancel, aio_cancel, GLIBC_2_3); +versioned_symbol (librt, __new_aio_cancel64, aio_cancel64, GLIBC_2_3); + +#if SHLIB_COMPAT (librt, GLIBC_2_1, GLIBC_2_3) + +#undef ECANCELED +#define aio_cancel __old_aio_cancel +#define ECANCELED 125 + +#include <sysdeps/unix/sysv/linux/kaio_cancel.c> + +#undef aio_cancel +strong_alias (__old_aio_cancel, __old_aio_cancel64); +compat_symbol (librt, __old_aio_cancel, aio_cancel, GLIBC_2_1); +compat_symbol (librt, __old_aio_cancel64, aio_cancel64, GLIBC_2_1); + +#endif diff --git a/rtkaio/sysdeps/unix/sysv/linux/sparc/rtkaio-sysdep.c b/rtkaio/sysdeps/unix/sysv/linux/sparc/rtkaio-sysdep.c new file mode 100644 index 0000000000..ff0440aa83 --- /dev/null +++ b/rtkaio/sysdeps/unix/sysv/linux/sparc/rtkaio-sysdep.c @@ -0,0 +1 @@ +#include <rt-sysdep.c> diff --git a/rtkaio/sysdeps/unix/sysv/linux/sparc/sparc64/Versions b/rtkaio/sysdeps/unix/sysv/linux/sparc/sparc64/Versions new file mode 100644 index 0000000000..7443c81d6a --- /dev/null +++ b/rtkaio/sysdeps/unix/sysv/linux/sparc/sparc64/Versions @@ -0,0 +1,9 @@ +%ifdef HAVE_FORCED_UNWIND +librtkaio { + GLIBC_2.3.3 { + # Changed timer_t. + timer_create; timer_delete; timer_getoverrun; timer_gettime; + timer_settime; + } +} +%endif diff --git a/rtkaio/sysdeps/unix/sysv/linux/syscalls.list b/rtkaio/sysdeps/unix/sysv/linux/syscalls.list new file mode 100644 index 0000000000..686b8d5d2e --- /dev/null +++ b/rtkaio/sysdeps/unix/sysv/linux/syscalls.list @@ -0,0 +1,5 @@ +# File name Caller Syscall name Args Strong name Weak names + +kaio_mq_timedsend - mq_timedsend Ci:ipiip __GI_mq_timedsend mq_timedsend +kaio_mq_timedreceive - mq_timedreceive Ci:ipipp __GI_mq_timedreceive mq_timedreceive +kaio_mq_setattr - mq_getsetattr i:ipp __GI_mq_setattr mq_setattr diff --git a/rtkaio/sysdeps/unix/sysv/linux/x86_64/Versions b/rtkaio/sysdeps/unix/sysv/linux/x86_64/Versions new file mode 100644 index 0000000000..7443c81d6a --- /dev/null +++ b/rtkaio/sysdeps/unix/sysv/linux/x86_64/Versions @@ -0,0 +1,9 @@ +%ifdef HAVE_FORCED_UNWIND +librtkaio { + GLIBC_2.3.3 { + # Changed timer_t. + timer_create; timer_delete; timer_getoverrun; timer_gettime; + timer_settime; + } +} +%endif |