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Diffstat (limited to 'src/common/fdset_kqueue.c')
-rw-r--r--src/common/fdset_kqueue.c260
1 files changed, 0 insertions, 260 deletions
diff --git a/src/common/fdset_kqueue.c b/src/common/fdset_kqueue.c
deleted file mode 100644
index 7c52f71..0000000
--- a/src/common/fdset_kqueue.c
+++ /dev/null
@@ -1,260 +0,0 @@
-/* Copyright (C) 2011 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
-
- This program is free software: you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
-
- This program 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 General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <config.h>
-#ifdef HAVE_KQUEUE
-
-#include <stdint.h>
-#include <string.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <sys/event.h>
-#include <sys/time.h>
-#include <time.h>
-
-#include "fdset_kqueue.h"
-
-#define OS_FDS_CHUNKSIZE 8 /*!< Number of pollfd structs in a chunk. */
-#define OS_FDS_KEEPCHUNKS 32 /*!< Will attempt to free memory when reached. */
-
-struct fdset_t {
- fdset_base_t _base;
- int kq;
- struct kevent *events;
- struct kevent *revents;
- size_t nfds;
- size_t reserved;
- size_t rreserved;
- size_t polled;
-};
-
-fdset_t *fdset_kqueue_new()
-{
- fdset_t *set = malloc(sizeof(fdset_t));
- if (set) {
- /* Blank memory. */
- memset(set, 0, sizeof(fdset_t));
-
- /* Create kqueue fd. */
- set->kq = kqueue();
- if (set->kq < 0) {
- free(set);
- set = 0;
- }
- }
-
- return set;
-}
-
-int fdset_kqueue_destroy(fdset_t * fdset)
-{
- if(fdset == NULL) {
- return -1;
- }
-
- /* Teardown kqueue. */
- close(fdset->kq);
-
- /* OK if NULL. */
- free(fdset->revents);
- free(fdset->events);
- free(fdset);
- return 0;
-}
-
-int fdset_kqueue_add(fdset_t *fdset, int fd, int events)
-{
- if (fdset == NULL || fd < 0 || events <= 0) {
- return -1;
- }
-
- /* Realloc needed. */
- int ret = 0;
- ret += mreserve((char **)&fdset->events, sizeof(struct kevent),
- fdset->nfds + 1, OS_FDS_CHUNKSIZE, &fdset->reserved);
- ret += mreserve((char **)&fdset->revents, sizeof(struct kevent),
- fdset->nfds + 1, OS_FDS_CHUNKSIZE, &fdset->rreserved);
- if (ret != 0) {
- return ret;
- }
-
- /* Add to kqueue set. */
- int evfilt = EVFILT_READ;
- EV_SET(&fdset->events[fdset->nfds], fd, evfilt,
- EV_ADD|EV_ENABLE, 0, 0, 0);
- memset(fdset->revents + fdset->nfds, 0, sizeof(struct kevent));
-
- ++fdset->nfds;
- return 0;
-}
-
-int fdset_kqueue_remove(fdset_t *fdset, int fd)
-{
- if (fdset == NULL || fd < 0) {
- return -1;
- }
-
- /* Find in set. */
- int pos = -1;
- for (int i = 0; i < fdset->nfds; ++i) {
- if (fdset->events[i].ident == fd) {
- pos = i;
- break;
- }
- }
-
- if (pos < 0) {
- return -1;
- }
-
- /* Remove filters. */
- EV_SET(&fdset->events[pos], fd, EVFILT_READ,
- EV_DISABLE|EV_DELETE, 0, 0, 0);
-
- /* Attempt to remove from set. */
- size_t remaining = ((fdset->nfds - pos) - 1) * sizeof(struct kevent);
- memmove(fdset->events + pos, fdset->events + (pos + 1), remaining);
-
- /* Attempt to remove from revents set. */
- pos = -1;
- for (int i = 0; i < fdset->nfds; ++i) {
- if (fdset->events[i].ident == fd) {
- pos = i;
- break;
- }
- }
- if (pos >= 0) {
- size_t remaining = ((fdset->nfds - pos) - 1) * sizeof(struct kevent);
- memmove(fdset->revents + pos, fdset->revents + (pos + 1), remaining);
- }
-
-
- /* Overwrite current item. */
- --fdset->nfds;
-
- /* Trim excessive memory if possible (retval is not interesting). */
- mreserve((char **)&fdset->events, sizeof(struct kevent),
- fdset->nfds, OS_FDS_CHUNKSIZE, &fdset->reserved);
- mreserve((char **)&fdset->revents, sizeof(struct kevent),
- fdset->nfds, OS_FDS_CHUNKSIZE, &fdset->rreserved);
-
- return 0;
-}
-
-int fdset_kqueue_wait(fdset_t *fdset, int timeout)
-{
- if (fdset == NULL || fdset->nfds < 1 || fdset->events == NULL) {
- return -1;
- }
-
- /* Set timeout. */
- struct timespec tmval;
- struct timespec *tm = NULL;
- if (timeout == 0) {
- tmval.tv_sec = tmval.tv_nsec = 0;
- tm = &tmval;
- } else if (timeout > 0) {
- tmval.tv_sec = timeout / 1000; /* ms -> s */
- timeout -= tmval.tv_sec * 1000; /* Cut off */
- tmval.tv_nsec = timeout * 1000000L; /* ms -> ns */
- tm = &tmval;
- }
-
- /* Poll new events. */
- fdset->polled = 0;
- int nfds = kevent(fdset->kq, fdset->events, fdset->nfds,
- fdset->revents, fdset->nfds, tm);
-
- /* Check. */
- if (nfds < 0) {
- return -1;
- }
-
- /* Events array is ordered from 0 to nfds. */
- fdset->polled = nfds;
- return nfds;
-}
-
-int fdset_kqueue_begin(fdset_t *fdset, fdset_it_t *it)
-{
- if (fdset == NULL || it == NULL) {
- return -1;
- }
-
- /* Find first. */
- it->pos = 0;
- it->fd = -1;
- return fdset_next(fdset, it);
-}
-
-int fdset_kqueue_end(fdset_t *fdset, fdset_it_t *it)
-{
- if (fdset == NULL || it == NULL || fdset->nfds < 1) {
- return -1;
- }
-
- /* Check for polled events. */
- if (fdset->polled < 1) {
- it->fd = -1;
- it->pos = 0;
- return -1;
- }
-
- /* No end found, ends on the beginning. */
- size_t nid = fdset->polled - 1;
- it->fd = fdset->revents[nid].ident;
- it->pos = nid;
- it->events = 0; /*! \todo Map events. */
- return -1;
-}
-
-int fdset_kqueue_next(fdset_t *fdset, fdset_it_t *it)
-{
- if (fdset == NULL || it == NULL || fdset->polled < 1) {
- return -1;
- }
-
- /* Check boundaries. */
- if (it->pos >= fdset->polled || it->pos >= fdset->nfds) {
- return -1;
- }
-
- /* Select next. */
- size_t nid = it->pos++;
- it->fd = fdset->revents[nid].ident;
- it->events = 0; /*! \todo Map events. */
- return 0;
-}
-
-const char* fdset_kqueue_method()
-{
- return "kqueue";
-}
-
-/* Package APIs. */
-struct fdset_backend_t FDSET_KQUEUE = {
- .fdset_new = fdset_kqueue_new,
- .fdset_destroy = fdset_kqueue_destroy,
- .fdset_add = fdset_kqueue_add,
- .fdset_remove = fdset_kqueue_remove,
- .fdset_wait = fdset_kqueue_wait,
- .fdset_begin = fdset_kqueue_begin,
- .fdset_end = fdset_kqueue_end,
- .fdset_next = fdset_kqueue_next,
- .fdset_method = fdset_kqueue_method
-};
-
-#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-16 06:40:08 +0000