diff options
Diffstat (limited to 'usr/src/lib/libtnfctl/checklib.c')
| -rw-r--r-- | usr/src/lib/libtnfctl/checklib.c | 135 |
1 files changed, 0 insertions, 135 deletions
diff --git a/usr/src/lib/libtnfctl/checklib.c b/usr/src/lib/libtnfctl/checklib.c deleted file mode 100644 index 324cbcfbd1..0000000000 --- a/usr/src/lib/libtnfctl/checklib.c +++ /dev/null @@ -1,135 +0,0 @@ -/* - * CDDL HEADER START - * - * The contents of this file are subject to the terms of the - * Common Development and Distribution License, Version 1.0 only - * (the "License"). You may not use this file except in compliance - * with the License. - * - * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE - * or http://www.opensolaris.org/os/licensing. - * See the License for the specific language governing permissions - * and limitations under the License. - * - * When distributing Covered Code, include this CDDL HEADER in each - * file and include the License file at usr/src/OPENSOLARIS.LICENSE. - * If applicable, add the following below this CDDL HEADER, with the - * fields enclosed by brackets "[]" replaced with your own identifying - * information: Portions Copyright [yyyy] [name of copyright owner] - * - * CDDL HEADER END - */ -/* - * Copyright (c) 1994, by Sun Microsytems, Inc. - */ - -/* - * Functions to sync up library list with that of the run time linker - */ - -#ifndef DEBUG -#define NDEBUG 1 -#endif - -#include <assert.h> - -#include "tnfctl_int.h" -#include "kernel_int.h" -#include "dbg.h" - -tnfctl_errcode_t -tnfctl_check_libs(tnfctl_handle_t *hndl) -{ - tnfctl_errcode_t prexstat; - enum event_op_t dl_evt; - boolean_t lmap_ok; - - if (hndl->mode == KERNEL_MODE) { - prexstat = _tnfctl_refresh_kernel(hndl); - return (prexstat); - } - - /* hndl refers to a process */ - - /* return value of lmap_ok, dl_evt ignored */ - prexstat = _tnfctl_refresh_process(hndl, &lmap_ok, &dl_evt); - assert(lmap_ok == B_TRUE); - return (prexstat); -} - -/* - * _tnfctl_lock_libs() locks the library list maintained in the prex - * handle against it changing by a dlopen or dlclose. - * - * This locking code is between the thread that owns the handle and - * another thread that may be doing a dlopen/dlclose. We do not support - * the situation of having multiple threads operating on the same - * handle - in effect the code per tnfctl_handle can be thought of as - * being single-threaded - that is why we can check "hndl->in_objlist" - * without first obtaining a lock. "in_objlist" is the re-entrancy - * protector on the lock i.e. we can call _tnfctl_lock_libs() safely even if - * this thread has the lock held. The return value "release_lock" indicates - * whether the lock should be released or not. It can be passed into - * _tnfctl_unlock_libs() which will do the right thing. - */ - -tnfctl_errcode_t -_tnfctl_lock_libs(tnfctl_handle_t *hndl, boolean_t *release_lock) -{ - /* this interface is only for INTERNAL_MODE clients */ - assert(hndl->mode == INTERNAL_MODE); - - if (hndl->in_objlist == B_TRUE) { - /* - * already have _tnfctl_lmap_lock held which implies that - * the library list has been sync'ed up - */ - *release_lock = B_FALSE; - return (TNFCTL_ERR_NONE); - } - - /* lock is not currently held, so lock it */ - mutex_lock(&_tnfctl_lmap_lock); - hndl->in_objlist = B_TRUE; - - *release_lock = B_TRUE; - return (TNFCTL_ERR_NONE); -} - -void -_tnfctl_unlock_libs(tnfctl_handle_t *hndl, boolean_t release_lock) -{ - /* this interface is only for INTERNAL_MODE clients */ - assert(hndl->mode == INTERNAL_MODE); - - if (release_lock) { - hndl->in_objlist = B_FALSE; - mutex_unlock(&_tnfctl_lmap_lock); - } -} - -/* - * _tnfctl_syn_lib_list() syncs up the library list maintained - * in the prex handle with the libraries in the process (if needed) - * NOTE: Assumes _tnfctl_lmap_lock is held. - * - */ -tnfctl_errcode_t -_tnfctl_sync_lib_list(tnfctl_handle_t *hndl) -{ - tnfctl_errcode_t prexstat = TNFCTL_ERR_NONE; - enum event_op_t dl_evt; - boolean_t lmap_ok; - - /* this interface is only for INTERNAL_MODE clients */ - assert(hndl->mode == INTERNAL_MODE); - - /* lmap_lock held and in_objlist marked as B_TRUE */ - if (_tnfctl_libs_changed == B_TRUE) { - prexstat = _tnfctl_refresh_process(hndl, &lmap_ok, &dl_evt); - if (prexstat) { - return (prexstat); - } - } - return (TNFCTL_ERR_NONE); -} |