diff options
Diffstat (limited to 'main/lock.c')
| -rw-r--r-- | main/lock.c | 847 |
1 files changed, 847 insertions, 0 deletions
diff --git a/main/lock.c b/main/lock.c new file mode 100644 index 000000000..49fab1b78 --- /dev/null +++ b/main/lock.c @@ -0,0 +1,847 @@ +/* + * Asterisk -- An open source telephony toolkit. + * + * Copyright (C) 1999 - 2010, Digium, Inc. + * + * Mark Spencer <markster@digium.com> + * + * See http://www.asterisk.org for more information about + * the Asterisk project. Please do not directly contact + * any of the maintainers of this project for assistance; + * the project provides a web site, mailing lists and IRC + * channels for your use. + * + * This program is free software, distributed under the terms of + * the GNU General Public License Version 2. See the LICENSE file + * at the top of the source tree. + */ + +/*! \file + * + * \brief General Asterisk locking. + */ + +#include "asterisk.h" + +ASTERISK_FILE_VERSION(__FILE__, "$Revision$") + +#include "asterisk/lock.h" + +#define ROFFSET ((t->reentrancy > 0) ? (t->reentrancy-1) : 0) + +/* Allow direct use of pthread_mutex_* / pthread_cond_* */ +#undef pthread_mutex_init +#undef pthread_mutex_destroy +#undef pthread_mutex_lock +#undef pthread_mutex_trylock +#undef pthread_mutex_unlock +#undef pthread_cond_init +#undef pthread_cond_signal +#undef pthread_cond_broadcast +#undef pthread_cond_destroy +#undef pthread_cond_wait +#undef pthread_cond_timedwait + +int __ast_pthread_mutex_init(int track, const char *filename, int lineno, const char *func, + const char *mutex_name, ast_mutex_t *t) +{ + int res; + pthread_mutexattr_t attr; + +#ifdef DEBUG_THREADS +#ifdef AST_MUTEX_INIT_W_CONSTRUCTORS + if ((t->mutex) != ((pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER)) { +/* + int canlog = strcmp(filename, "logger.c") & track; + __ast_mutex_logger("%s line %d (%s): NOTICE: mutex '%s' is already initialized.\n", + filename, lineno, func, mutex_name); + DO_THREAD_CRASH; +*/ + return 0; + } +#endif /* AST_MUTEX_INIT_W_CONSTRUCTORS */ + + ast_reentrancy_init(t); + t->track = track; +#endif /* DEBUG_THREADS */ + + pthread_mutexattr_init(&attr); + pthread_mutexattr_settype(&attr, AST_MUTEX_KIND); + + res = pthread_mutex_init(&t->mutex, &attr); + pthread_mutexattr_destroy(&attr); + return res; +} + +int __ast_pthread_mutex_destroy(const char *filename, int lineno, const char *func, + const char *mutex_name, ast_mutex_t *t) +{ + int res; + +#ifdef DEBUG_THREADS + int canlog = strcmp(filename, "logger.c") & t->track; + +#ifdef AST_MUTEX_INIT_W_CONSTRUCTORS + if ((t->mutex) == ((pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER)) { + /* Don't try to uninitialize non initialized mutex + * This may no effect on linux + * And always ganerate core on *BSD with + * linked libpthread + * This not error condition if the mutex created on the fly. + */ + __ast_mutex_logger("%s line %d (%s): NOTICE: mutex '%s' is uninitialized.\n", + filename, lineno, func, mutex_name); + return 0; + } +#endif + + res = pthread_mutex_trylock(&t->mutex); + switch (res) { + case 0: + pthread_mutex_unlock(&t->mutex); + break; + case EINVAL: + __ast_mutex_logger("%s line %d (%s): Error: attempt to destroy invalid mutex '%s'.\n", + filename, lineno, func, mutex_name); + break; + case EBUSY: + __ast_mutex_logger("%s line %d (%s): Error: attempt to destroy locked mutex '%s'.\n", + filename, lineno, func, mutex_name); + ast_reentrancy_lock(t); + __ast_mutex_logger("%s line %d (%s): Error: '%s' was locked here.\n", + t->file[ROFFSET], t->lineno[ROFFSET], t->func[ROFFSET], mutex_name); + ast_reentrancy_unlock(t); + break; + } +#endif /* DEBUG_THREADS */ + + res = pthread_mutex_destroy(&t->mutex); + +#ifdef DEBUG_THREADS + if (res) + __ast_mutex_logger("%s line %d (%s): Error destroying mutex %s: %s\n", + filename, lineno, func, mutex_name, strerror(res)); +#ifndef PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP + else + t->mutex = PTHREAD_MUTEX_INIT_VALUE; +#endif + ast_reentrancy_lock(t); + t->file[0] = filename; + t->lineno[0] = lineno; + t->func[0] = func; + t->reentrancy = 0; + t->thread[0] = 0; + ast_reentrancy_unlock(t); + delete_reentrancy_cs(t); +#endif /* DEBUG_THREADS */ + + return res; +} + +int __ast_pthread_mutex_lock(const char *filename, int lineno, const char *func, + const char* mutex_name, ast_mutex_t *t) +{ + int res; +#ifdef DEBUG_THREADS + int canlog = strcmp(filename, "logger.c") & t->track; +#if defined(AST_MUTEX_INIT_W_CONSTRUCTORS) + if ((t->mutex) == ((pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER)) { + /* Don't warn abount uninitialized mutex. + * Simple try to initialize it. + * May be not needed in linux system. + */ + res = __ast_pthread_mutex_init(t->track, filename, lineno, func, mutex_name, t); + if ((t->mutex) == ((pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER)) { + __ast_mutex_logger("%s line %d (%s): Error: mutex '%s' is uninitialized and unable to initialize.\n", + filename, lineno, func, mutex_name); + return res; + } + } +#endif /* AST_MUTEX_INIT_W_CONSTRUCTORS */ + + if (t->track) + ast_store_lock_info(AST_MUTEX, filename, lineno, func, mutex_name, &t->mutex); +#endif /* DEBUG_THREADS */ + +#ifdef DETECT_DEADLOCKS +#ifdef DEBUG_THREADS + { + time_t seconds = time(NULL); + time_t wait_time, reported_wait = 0; + do { +#ifdef HAVE_MTX_PROFILE + ast_mark(mtx_prof, 1); +#endif + res = pthread_mutex_trylock(&t->mutex); +#ifdef HAVE_MTX_PROFILE + ast_mark(mtx_prof, 0); +#endif + if (res == EBUSY) { + wait_time = time(NULL) - seconds; + if (wait_time > reported_wait && (wait_time % 5) == 0) { + __ast_mutex_logger("%s line %d (%s): Deadlock? waited %d sec for mutex '%s'?\n", + filename, lineno, func, (int) wait_time, mutex_name); + ast_reentrancy_lock(t); + __ast_mutex_logger("%s line %d (%s): '%s' was locked here.\n", + t->file[ROFFSET], t->lineno[ROFFSET], + t->func[ROFFSET], mutex_name); + ast_reentrancy_unlock(t); + reported_wait = wait_time; + } + usleep(200); + } + } while (res == EBUSY); + } +#endif /* DEBUG_THREADS */ +#else /* !DETECT_DEADLOCKS */ +#ifdef HAVE_MTX_PROFILE + ast_mark(mtx_prof, 1); + res = pthread_mutex_trylock(&t->mutex); + ast_mark(mtx_prof, 0); + if (res) +#endif + res = pthread_mutex_lock(&t->mutex); +#endif /* !DETECT_DEADLOCKS */ + +#ifdef DEBUG_THREADS + if (!res) { + ast_reentrancy_lock(t); + if (t->reentrancy < AST_MAX_REENTRANCY) { + t->file[t->reentrancy] = filename; + t->lineno[t->reentrancy] = lineno; + t->func[t->reentrancy] = func; + t->thread[t->reentrancy] = pthread_self(); + t->reentrancy++; + } else { + __ast_mutex_logger("%s line %d (%s): '%s' really deep reentrancy!\n", + filename, lineno, func, mutex_name); + } + ast_reentrancy_unlock(t); + if (t->track) + ast_mark_lock_acquired(&t->mutex); + } else { + if (t->track) + ast_remove_lock_info(&t->mutex); + __ast_mutex_logger("%s line %d (%s): Error obtaining mutex: %s\n", + filename, lineno, func, strerror(res)); + DO_THREAD_CRASH; + } +#endif /* DEBUG_THREADS */ + return res; +} + +int __ast_pthread_mutex_trylock(const char *filename, int lineno, const char *func, + const char* mutex_name, ast_mutex_t *t) +{ + int res; +#ifdef DEBUG_THREADS + int canlog = strcmp(filename, "logger.c") & t->track; + +#if defined(AST_MUTEX_INIT_W_CONSTRUCTORS) + if ((t->mutex) == ((pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER)) { + /* Don't warn abount uninitialized mutex. + * Simple try to initialize it. + * May be not needed in linux system. + */ + res = __ast_pthread_mutex_init(t->track, filename, lineno, func, mutex_name, t); + if ((t->mutex) == ((pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER)) { + __ast_mutex_logger("%s line %d (%s): Error: mutex '%s' is uninitialized and unable to initialize.\n", + filename, lineno, func, mutex_name); + return res; + } + } +#endif /* AST_MUTEX_INIT_W_CONSTRUCTORS */ + + if (t->track) + ast_store_lock_info(AST_MUTEX, filename, lineno, func, mutex_name, &t->mutex); +#endif /* DEBUG_THREADS */ + + res = pthread_mutex_trylock(&t->mutex); + +#ifdef DEBUG_THREADS + if (!res) { + ast_reentrancy_lock(t); + if (t->reentrancy < AST_MAX_REENTRANCY) { + t->file[t->reentrancy] = filename; + t->lineno[t->reentrancy] = lineno; + t->func[t->reentrancy] = func; + t->thread[t->reentrancy] = pthread_self(); + t->reentrancy++; + } else { + __ast_mutex_logger("%s line %d (%s): '%s' really deep reentrancy!\n", + filename, lineno, func, mutex_name); + } + ast_reentrancy_unlock(t); + if (t->track) + ast_mark_lock_acquired(&t->mutex); + } else if (t->track) { + ast_mark_lock_failed(&t->mutex); + } +#endif /* DEBUG_THREADS */ + return res; +} + +int __ast_pthread_mutex_unlock(const char *filename, int lineno, const char *func, + const char *mutex_name, ast_mutex_t *t) +{ + int res; +#ifdef DEBUG_THREADS + int canlog = strcmp(filename, "logger.c") & t->track; + +#ifdef AST_MUTEX_INIT_W_CONSTRUCTORS + if ((t->mutex) == ((pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER)) { + __ast_mutex_logger("%s line %d (%s): Error: mutex '%s' is uninitialized.\n", + filename, lineno, func, mutex_name); + res = __ast_pthread_mutex_init(t->track, filename, lineno, func, mutex_name, t); + if ((t->mutex) == ((pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER)) { + __ast_mutex_logger("%s line %d (%s): Error: mutex '%s' is uninitialized and unable to initialize.\n", + filename, lineno, func, mutex_name); + } + return res; + } +#endif /* AST_MUTEX_INIT_W_CONSTRUCTORS */ + + ast_reentrancy_lock(t); + if (t->reentrancy && (t->thread[ROFFSET] != pthread_self())) { + __ast_mutex_logger("%s line %d (%s): attempted unlock mutex '%s' without owning it!\n", + filename, lineno, func, mutex_name); + __ast_mutex_logger("%s line %d (%s): '%s' was locked here.\n", + t->file[ROFFSET], t->lineno[ROFFSET], t->func[ROFFSET], mutex_name); + DO_THREAD_CRASH; + } + + if (--t->reentrancy < 0) { + __ast_mutex_logger("%s line %d (%s): mutex '%s' freed more times than we've locked!\n", + filename, lineno, func, mutex_name); + t->reentrancy = 0; + } + + if (t->reentrancy < AST_MAX_REENTRANCY) { + t->file[t->reentrancy] = NULL; + t->lineno[t->reentrancy] = 0; + t->func[t->reentrancy] = NULL; + t->thread[t->reentrancy] = 0; + } + ast_reentrancy_unlock(t); + + if (t->track) + ast_remove_lock_info(&t->mutex); +#endif /* DEBUG_THREADS */ + + res = pthread_mutex_unlock(&t->mutex); + +#ifdef DEBUG_THREADS + if (res) { + __ast_mutex_logger("%s line %d (%s): Error releasing mutex: %s\n", + filename, lineno, func, strerror(res)); + DO_THREAD_CRASH; + } +#endif /* DEBUG_THREADS */ + return res; +} + +int __ast_cond_init(const char *filename, int lineno, const char *func, + const char *cond_name, ast_cond_t *cond, pthread_condattr_t *cond_attr) +{ + return pthread_cond_init(cond, cond_attr); +} + +int __ast_cond_signal(const char *filename, int lineno, const char *func, + const char *cond_name, ast_cond_t *cond) +{ + return pthread_cond_signal(cond); +} + +int __ast_cond_broadcast(const char *filename, int lineno, const char *func, + const char *cond_name, ast_cond_t *cond) +{ + return pthread_cond_broadcast(cond); +} + +int __ast_cond_destroy(const char *filename, int lineno, const char *func, + const char *cond_name, ast_cond_t *cond) +{ + return pthread_cond_destroy(cond); +} + +int __ast_cond_wait(const char *filename, int lineno, const char *func, + const char *cond_name, const char *mutex_name, + ast_cond_t *cond, ast_mutex_t *t) +{ + int res; +#ifdef DEBUG_THREADS + int canlog = strcmp(filename, "logger.c") & t->track; + +#ifdef AST_MUTEX_INIT_W_CONSTRUCTORS + if ((t->mutex) == ((pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER)) { + __ast_mutex_logger("%s line %d (%s): Error: mutex '%s' is uninitialized.\n", + filename, lineno, func, mutex_name); + res = __ast_pthread_mutex_init(t->track, filename, lineno, func, mutex_name, t); + if ((t->mutex) == ((pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER)) { + __ast_mutex_logger("%s line %d (%s): Error: mutex '%s' is uninitialized and unable to initialize.\n", + filename, lineno, func, mutex_name); + } + return res; + } +#endif /* AST_MUTEX_INIT_W_CONSTRUCTORS */ + + ast_reentrancy_lock(t); + if (t->reentrancy && (t->thread[ROFFSET] != pthread_self())) { + __ast_mutex_logger("%s line %d (%s): attempted unlock mutex '%s' without owning it!\n", + filename, lineno, func, mutex_name); + __ast_mutex_logger("%s line %d (%s): '%s' was locked here.\n", + t->file[ROFFSET], t->lineno[ROFFSET], t->func[ROFFSET], mutex_name); + DO_THREAD_CRASH; + } + + if (--t->reentrancy < 0) { + __ast_mutex_logger("%s line %d (%s): mutex '%s' freed more times than we've locked!\n", + filename, lineno, func, mutex_name); + t->reentrancy = 0; + } + + if (t->reentrancy < AST_MAX_REENTRANCY) { + t->file[t->reentrancy] = NULL; + t->lineno[t->reentrancy] = 0; + t->func[t->reentrancy] = NULL; + t->thread[t->reentrancy] = 0; + } + ast_reentrancy_unlock(t); + + if (t->track) + ast_remove_lock_info(&t->mutex); +#endif /* DEBUG_THREADS */ + + res = pthread_cond_wait(cond, &t->mutex); + +#ifdef DEBUG_THREADS + if (res) { + __ast_mutex_logger("%s line %d (%s): Error waiting on condition mutex '%s'\n", + filename, lineno, func, strerror(res)); + DO_THREAD_CRASH; + } else { + ast_reentrancy_lock(t); + if (t->reentrancy < AST_MAX_REENTRANCY) { + t->file[t->reentrancy] = filename; + t->lineno[t->reentrancy] = lineno; + t->func[t->reentrancy] = func; + t->thread[t->reentrancy] = pthread_self(); + t->reentrancy++; + } else { + __ast_mutex_logger("%s line %d (%s): '%s' really deep reentrancy!\n", + filename, lineno, func, mutex_name); + } + ast_reentrancy_unlock(t); + + if (t->track) + ast_store_lock_info(AST_MUTEX, filename, lineno, func, mutex_name, &t->mutex); + } +#endif /* DEBUG_THREADS */ + return res; +} + +int __ast_cond_timedwait(const char *filename, int lineno, const char *func, + const char *cond_name, const char *mutex_name, ast_cond_t *cond, + ast_mutex_t *t, const struct timespec *abstime) +{ + int res; +#ifdef DEBUG_THREADS + int canlog = strcmp(filename, "logger.c") & t->track; + +#ifdef AST_MUTEX_INIT_W_CONSTRUCTORS + if ((t->mutex) == ((pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER)) { + __ast_mutex_logger("%s line %d (%s): Error: mutex '%s' is uninitialized.\n", + filename, lineno, func, mutex_name); + res = __ast_pthread_mutex_init(t->track, filename, lineno, func, mutex_name, t); + if ((t->mutex) == ((pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER)) { + __ast_mutex_logger("%s line %d (%s): Error: mutex '%s' is uninitialized and unable to initialize.\n", + filename, lineno, func, mutex_name); + } + return res; + } +#endif /* AST_MUTEX_INIT_W_CONSTRUCTORS */ + + ast_reentrancy_lock(t); + if (t->reentrancy && (t->thread[ROFFSET] != pthread_self())) { + __ast_mutex_logger("%s line %d (%s): attempted unlock mutex '%s' without owning it!\n", + filename, lineno, func, mutex_name); + __ast_mutex_logger("%s line %d (%s): '%s' was locked here.\n", + t->file[ROFFSET], t->lineno[ROFFSET], t->func[ROFFSET], mutex_name); + DO_THREAD_CRASH; + } + + if (--t->reentrancy < 0) { + __ast_mutex_logger("%s line %d (%s): mutex '%s' freed more times than we've locked!\n", + filename, lineno, func, mutex_name); + t->reentrancy = 0; + } + + if (t->reentrancy < AST_MAX_REENTRANCY) { + t->file[t->reentrancy] = NULL; + t->lineno[t->reentrancy] = 0; + t->func[t->reentrancy] = NULL; + t->thread[t->reentrancy] = 0; + } + ast_reentrancy_unlock(t); + + if (t->track) + ast_remove_lock_info(&t->mutex); +#endif /* DEBUG_THREADS */ + + res = pthread_cond_timedwait(cond, &t->mutex, abstime); + +#ifdef DEBUG_THREADS + if (res && (res != ETIMEDOUT)) { + __ast_mutex_logger("%s line %d (%s): Error waiting on condition mutex '%s'\n", + filename, lineno, func, strerror(res)); + DO_THREAD_CRASH; + } else { + ast_reentrancy_lock(t); + if (t->reentrancy < AST_MAX_REENTRANCY) { + t->file[t->reentrancy] = filename; + t->lineno[t->reentrancy] = lineno; + t->func[t->reentrancy] = func; + t->thread[t->reentrancy] = pthread_self(); + t->reentrancy++; + } else { + __ast_mutex_logger("%s line %d (%s): '%s' really deep reentrancy!\n", + filename, lineno, func, mutex_name); + } + ast_reentrancy_unlock(t); + + if (t->track) + ast_store_lock_info(AST_MUTEX, filename, lineno, func, mutex_name, &t->mutex); + } +#endif /* DEBUG_THREADS */ + return res; +} + + + +int __ast_rwlock_init(const char *filename, int lineno, const char *func, const char *rwlock_name, ast_rwlock_t *prwlock) +{ + int res; + pthread_rwlockattr_t attr; +#ifdef DEBUG_THREADS +#ifdef AST_MUTEX_INIT_W_CONSTRUCTORS + int canlog = strcmp(filename, "logger.c"); + + if (*prwlock != ((ast_rwlock_t) AST_RWLOCK_INIT_VALUE)) { + __ast_mutex_logger("%s line %d (%s): Warning: rwlock '%s' is already initialized.\n", + filename, lineno, func, rwlock_name); + return 0; + } +#endif /* AST_MUTEX_INIT_W_CONSTRUCTORS */ +#endif /* DEBUG_THREADS */ + pthread_rwlockattr_init(&attr); + +#ifdef HAVE_PTHREAD_RWLOCK_PREFER_WRITER_NP + pthread_rwlockattr_setkind_np(&attr, PTHREAD_RWLOCK_PREFER_WRITER_NP); +#endif + + res = pthread_rwlock_init(prwlock, &attr); + pthread_rwlockattr_destroy(&attr); + return res; +} + +int __ast_rwlock_destroy(const char *filename, int lineno, const char *func, const char *rwlock_name, ast_rwlock_t *prwlock) +{ + int res; +#ifdef DEBUG_THREADS + int canlog = strcmp(filename, "logger.c"); + +#ifdef AST_MUTEX_INIT_W_CONSTRUCTORS + if (*prwlock == ((ast_rwlock_t) AST_RWLOCK_INIT_VALUE)) { + __ast_mutex_logger("%s line %d (%s): Warning: rwlock '%s' is uninitialized.\n", + filename, lineno, func, rwlock_name); + return 0; + } +#endif /* AST_MUTEX_INIT_W_CONSTRUCTORS */ +#endif /* DEBUG_THREADS */ + + res = pthread_rwlock_destroy(prwlock); + +#ifdef DEBUG_THREADS + if (res) { + __ast_mutex_logger("%s line %d (%s): Error destroying rwlock %s: %s\n", + filename, lineno, func, rwlock_name, strerror(res)); + } +#endif /* DEBUG_THREADS */ + + return res; +} + +int __ast_rwlock_rdlock(const char *file, int line, const char *func, const char *name, ast_rwlock_t *lock) +{ + int res; +#ifdef DEBUG_THREADS +#ifdef AST_MUTEX_INIT_W_CONSTRUCTORS + int canlog = strcmp(file, "logger.c"); + + if (*lock == ((ast_rwlock_t) AST_RWLOCK_INIT_VALUE)) { + /* Don't warn abount uninitialized lock. + * Simple try to initialize it. + * May be not needed in linux system. + */ + res = __ast_rwlock_init(file, line, func, name, lock); + if (*lock == ((ast_rwlock_t) AST_RWLOCK_INIT_VALUE)) { + __ast_mutex_logger("%s line %d (%s): Error: rwlock '%s' is uninitialized and unable to initialize.\n", + file, line, func, name); + return res; + } + } +#endif /* AST_MUTEX_INIT_W_CONSTRUCTORS */ + + ast_store_lock_info(AST_RDLOCK, file, line, func, name, lock); +#endif /* DEBUG_THREADS */ + + res = pthread_rwlock_rdlock(lock); + +#ifdef DEBUG_THREADS + if (!res) + ast_mark_lock_acquired(lock); + else + ast_remove_lock_info(lock); +#endif /* DEBUG_THREADS */ + return res; +} + +int __ast_rwlock_wrlock(const char *file, int line, const char *func, const char *name, ast_rwlock_t *lock) +{ + int res; +#ifdef DEBUG_THREADS +#ifdef AST_MUTEX_INIT_W_CONSTRUCTORS + int canlog = strcmp(file, "logger.c"); + + if (*lock == ((ast_rwlock_t) AST_RWLOCK_INIT_VALUE)) { + /* Don't warn abount uninitialized lock. + * Simple try to initialize it. + * May be not needed in linux system. + */ + res = __ast_rwlock_init(file, line, func, name, lock); + if (*lock == ((ast_rwlock_t) AST_RWLOCK_INIT_VALUE)) { + __ast_mutex_logger("%s line %d (%s): Error: rwlock '%s' is uninitialized and unable to initialize.\n", + file, line, func, name); + return res; + } + } +#endif /* AST_MUTEX_INIT_W_CONSTRUCTORS */ + + ast_store_lock_info(AST_WRLOCK, file, line, func, name, lock); +#endif /* DEBUG_THREADS */ + + res = pthread_rwlock_wrlock(lock); + +#ifdef DEBUG_THREADS + if (!res) + ast_mark_lock_acquired(lock); + else + ast_remove_lock_info(lock); +#endif /* DEBUG_THREADS */ + + return res; +} + +int __ast_rwlock_tryrdlock(const char *file, int line, const char *func, const char *name, ast_rwlock_t *lock) +{ + int res; +#ifdef DEBUG_THREADS +#ifdef AST_MUTEX_INIT_W_CONSTRUCTORS + int canlog = strcmp(file, "logger.c"); + + if (*lock == ((ast_rwlock_t) AST_RWLOCK_INIT_VALUE)) { + /* Don't warn abount uninitialized lock. + * Simple try to initialize it. + * May be not needed in linux system. + */ + res = __ast_rwlock_init(file, line, func, name, lock); + if (*lock == ((ast_rwlock_t) AST_RWLOCK_INIT_VALUE)) { + __ast_mutex_logger("%s line %d (%s): Error: rwlock '%s' is uninitialized and unable to initialize.\n", + file, line, func, name); + return res; + } + } +#endif /* AST_MUTEX_INIT_W_CONSTRUCTORS */ + + ast_store_lock_info(AST_RDLOCK, file, line, func, name, lock); +#endif /* DEBUG_THREADS */ + + res = pthread_rwlock_tryrdlock(lock); + +#ifdef DEBUG_THREADS + if (!res) + ast_mark_lock_acquired(lock); + else + ast_remove_lock_info(lock); +#endif /* DEBUG_THREADS */ + + return res; +} + +int __ast_rwlock_trywrlock(const char *file, int line, const char *func, const char *name, ast_rwlock_t *lock) +{ + int res; +#ifdef DEBUG_THREADS +#ifdef AST_MUTEX_INIT_W_CONSTRUCTORS + int canlog = strcmp(file, "logger.c"); + + if (*lock == ((ast_rwlock_t) AST_RWLOCK_INIT_VALUE)) { + /* Don't warn abount uninitialized lock. + * Simple try to initialize it. + * May be not needed in linux system. + */ + res = __ast_rwlock_init(file, line, func, name, lock); + if (*lock == ((ast_rwlock_t) AST_RWLOCK_INIT_VALUE)) { + __ast_mutex_logger("%s line %d (%s): Error: rwlock '%s' is uninitialized and unable to initialize.\n", + file, line, func, name); + return res; + } + } +#endif /* AST_MUTEX_INIT_W_CONSTRUCTORS */ + + ast_store_lock_info(AST_WRLOCK, file, line, func, name, lock); +#endif /* DEBUG_THREADS */ + + res = pthread_rwlock_trywrlock(lock); + +#ifdef DEBUG_THREADS + if (!res) + ast_mark_lock_acquired(lock); + else + ast_remove_lock_info(lock); +#endif /* DEBUG_THREADS */ + + return res; +} + +int __ast_rwlock_unlock(const char *file, int line, const char *func, const char *name, ast_rwlock_t *lock) +{ + int res; +#ifdef DEBUG_THREADS +#ifdef AST_MUTEX_INIT_W_CONSTRUCTORS + int canlog = strcmp(file, "logger.c"); + + if (*lock == ((ast_rwlock_t) AST_RWLOCK_INIT_VALUE)) { + __ast_mutex_logger("%s line %d (%s): Warning: rwlock '%s' is uninitialized.\n", + file, line, func, name); + res = __ast_rwlock_init(file, line, func, name, lock); + if (*lock == ((ast_rwlock_t) AST_RWLOCK_INIT_VALUE)) { + __ast_mutex_logger("%s line %d (%s): Error: rwlock '%s' is uninitialized and unable to initialize.\n", + file, line, func, name); + } + return res; + } +#endif /* AST_MUTEX_INIT_W_CONSTRUCTORS */ +#endif /* DEBUG_THREADS */ + + res = pthread_rwlock_unlock(lock); + +#ifdef DEBUG_THREADS + ast_remove_lock_info(lock); +#endif /* DEBUG_THREADS */ + return res; +} + +int __ast_rwlock_timedrdlock(const char *file, int line, const char *func, const char *name, ast_rwlock_t *lock, const struct timespec *abs_timeout) +{ + int res; +#ifdef DEBUG_THREADS +#ifdef AST_MUTEX_INIT_W_CONSTRUCTORS + int canlog = strcmp(file, "logger.c"); + + if (*lock == ((ast_rwlock_t) AST_RWLOCK_INIT_VALUE)) { + /* Don't warn abount uninitialized lock. + * Simple try to initialize it. + * May be not needed in linux system. + */ + res = __ast_rwlock_init(file, line, func, name, lock); + if (*lock == ((ast_rwlock_t) AST_RWLOCK_INIT_VALUE)) { + __ast_mutex_logger("%s line %d (%s): Error: rwlock '%s' is uninitialized and unable to initialize.\n", + file, line, func, name); + return res; + } + } +#endif /* AST_MUTEX_INIT_W_CONSTRUCTORS */ + + ast_store_lock_info(AST_RDLOCK, file, line, func, name, lock); +#endif /* DEBUG_THREADS */ + +#ifdef HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK + res = pthread_rwlock_timedrdlock(lock, abs_timeout); +#else + do { + struct timeval _start = ast_tvnow(), _diff; + for (;;) { + if (!(res = pthread_rwlock_tryrdlock(lock))) { + break; + } + _diff = ast_tvsub(ast_tvnow(), _start); + if (_diff.tv_sec > abs_timeout->tv_sec || (_diff.tv_sec == abs_timeout->tv_sec && _diff.tv_usec * 1000 > abs_timeout->tv_nsec)) { + break; + } + usleep(1); + } + } while (0); +#endif + +#ifdef DEBUG_THREADS + if (!res) + ast_mark_lock_acquired(lock); + else + ast_remove_lock_info(lock); +#endif /* DEBUG_THREADS */ + + return res; +} + +int __ast_rwlock_timedwrlock(const char *file, int line, const char *func, const char *name, ast_rwlock_t *lock, const struct timespec *abs_timeout) +{ + int res; +#ifdef DEBUG_THREADS +#ifdef AST_MUTEX_INIT_W_CONSTRUCTORS + int canlog = strcmp(file, "logger.c"); + + if (*lock == ((ast_rwlock_t) AST_RWLOCK_INIT_VALUE)) { + /* Don't warn abount uninitialized lock. + * Simple try to initialize it. + * May be not needed in linux system. + */ + res = __ast_rwlock_init(file, line, func, name, lock); + if (*lock == ((ast_rwlock_t) AST_RWLOCK_INIT_VALUE)) { + __ast_mutex_logger("%s line %d (%s): Error: rwlock '%s' is uninitialized and unable to initialize.\n", + file, line, func, name); + return res; + } + } +#endif /* AST_MUTEX_INIT_W_CONSTRUCTORS */ + + ast_store_lock_info(AST_WRLOCK, file, line, func, name, lock); +#endif /* DEBUG_THREADS */ + +#ifdef HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK + res = pthread_rwlock_timedwrlock(lock, abs_timeout); +#else + do { + struct timeval _start = ast_tvnow(), _diff; + for (;;) { + if (!(res = pthread_rwlock_trywrlock(lock))) { + break; + } + _diff = ast_tvsub(ast_tvnow(), _start); + if (_diff.tv_sec > abs_timeout->tv_sec || (_diff.tv_sec == abs_timeout->tv_sec && _diff.tv_usec * 1000 > abs_timeout->tv_nsec)) { + break; + } + usleep(1); + } + } while (0); +#endif + +#ifdef DEBUG_THREADS + if (!res) + ast_mark_lock_acquired(lock); + else + ast_remove_lock_info(lock); +#endif /* DEBUG_THREADS */ + + return res; +} |