int __ast_rwlock_trywrlock(const char *filename, int line, const char *func, ast_rwlock_t *t, const char *name)
{
int res;
#ifdef DEBUG_THREADS
struct ast_lock_track *lt = NULL;
#ifdef HAVE_BKTR
struct ast_bt *bt = NULL;
#endif
if (t->tracking) {
lt = ast_get_reentrancy(&t->track);
}
if (lt) {
#ifdef HAVE_BKTR
struct ast_bt tmp;
/* The implementation of backtrace() may have its own locks.
* Capture the backtrace outside of the reentrancy lock to
* avoid deadlocks. See ASTERISK-22455. */
ast_bt_get_addresses(&tmp);
ast_reentrancy_lock(lt);
if (lt->reentrancy < AST_MAX_REENTRANCY) {
lt->backtrace[lt->reentrancy] = tmp;
bt = <->backtrace[lt->reentrancy];
}
ast_reentrancy_unlock(lt);
ast_store_lock_info(AST_WRLOCK, filename, line, func, name, t, bt);
#else
ast_store_lock_info(AST_WRLOCK, filename, line, func, name, t);
#endif
}
#endif /* DEBUG_THREADS */
res = pthread_rwlock_trywrlock(&t->lock);
#ifdef DEBUG_THREADS
if (!res && lt) {
ast_reentrancy_lock(lt);
if (lt->reentrancy < AST_MAX_REENTRANCY) {
lt->file[lt->reentrancy] = filename;
lt->lineno[lt->reentrancy] = line;
lt->func[lt->reentrancy] = func;
lt->thread[lt->reentrancy] = pthread_self();
lt->reentrancy++;
}
ast_reentrancy_unlock(lt);
ast_mark_lock_acquired(t);
} else if (lt) {
ast_mark_lock_failed(t);
}
#endif /* DEBUG_THREADS */
return res;
}
int __ast_rwlock_wrlock(const char *filename, int line, const char *func, ast_rwlock_t *t, const char *name)
{
int res;
#ifdef DEBUG_THREADS
struct ast_lock_track *lt;
int canlog = strcmp(filename, "logger.c") & t->tracking;
#ifdef HAVE_BKTR
struct ast_bt *bt = NULL;
#endif
#if defined(AST_MUTEX_INIT_W_CONSTRUCTORS) && defined(CAN_COMPARE_MUTEX_TO_INIT_VALUE)
if ((t->lock) == ((pthread_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(t->tracking, filename, line, func, name, t);
if ((t->lock) == ((pthread_rwlock_t) __AST_RWLOCK_INIT_VALUE)) {
__ast_mutex_logger("%s line %d (%s): Error: rwlock '%s' is uninitialized and unable to initialize.\n",
filename, line, func, name);
return res;
}
}
#endif /* AST_MUTEX_INIT_W_CONSTRUCTORS */
if (t->tracking && !t->track) {
ast_reentrancy_init(&t->track);
}
lt = t->track;
if (t->tracking) {
#ifdef HAVE_BKTR
ast_reentrancy_lock(lt);
if (lt->reentrancy != AST_MAX_REENTRANCY) {
ast_bt_get_addresses(<->backtrace[lt->reentrancy]);
bt = <->backtrace[lt->reentrancy];
}
ast_reentrancy_unlock(lt);
ast_store_lock_info(AST_WRLOCK, filename, line, func, name, t, bt);
#else
ast_store_lock_info(AST_WRLOCK, filename, line, func, name, t);
#endif
}
#endif /* DEBUG_THREADS */
#if defined(DETECT_DEADLOCKS) && defined(DEBUG_THREADS)
{
time_t seconds = time(NULL);
time_t wait_time, reported_wait = 0;
do {
res = pthread_rwlock_trywrlock(&t->lock);
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 writelock '%s'?\n",
filename, line, func, (int)wait_time, name);
if (t->tracking) {
ast_reentrancy_lock(lt);
#ifdef HAVE_BKTR
__dump_backtrace(<->backtrace[lt->reentrancy], canlog);
#endif
__ast_mutex_logger("%s line %d (%s): '%s' was locked here.\n",
lt->file[lt->reentrancy-1], lt->lineno[lt->reentrancy-1],
lt->func[lt->reentrancy-1], name);
#ifdef HAVE_BKTR
__dump_backtrace(<->backtrace[lt->reentrancy-1], canlog);
#endif
ast_reentrancy_unlock(lt);
}
reported_wait = wait_time;
}
usleep(200);
}
} while (res == EBUSY);
}
#else /* !DETECT_DEADLOCKS || !DEBUG_THREADS */
res = pthread_rwlock_wrlock(&t->lock);
#endif /* !DETECT_DEADLOCKS || !DEBUG_THREADS */
#ifdef DEBUG_THREADS
if (!res && t->tracking) {
ast_reentrancy_lock(lt);
if (lt->reentrancy < AST_MAX_REENTRANCY) {
lt->file[lt->reentrancy] = filename;
lt->lineno[lt->reentrancy] = line;
lt->func[lt->reentrancy] = func;
lt->thread[lt->reentrancy] = pthread_self();
lt->reentrancy++;
}
ast_reentrancy_unlock(lt);
if (t->tracking) {
ast_mark_lock_acquired(t);
}
} else if (t->tracking) {
#ifdef HAVE_BKTR
if (lt->reentrancy) {
ast_reentrancy_lock(lt);
bt = <->backtrace[lt->reentrancy-1];
ast_reentrancy_unlock(lt);
} else {
bt = NULL;
}
if (t->tracking) {
ast_remove_lock_info(t, bt);
}
#else
if (t->tracking) {
ast_remove_lock_info(t);
}
#endif
}
if (res) {
__ast_mutex_logger("%s line %d (%s): Error obtaining write lock: %s\n",
filename, line, 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
struct ast_lock_track *lt;
int canlog = strcmp(filename, "logger.c") & t->tracking;
#ifdef HAVE_BKTR
struct ast_bt *bt = NULL;
#endif
#if defined(AST_MUTEX_INIT_W_CONSTRUCTORS) && defined(CAN_COMPARE_MUTEX_TO_INIT_VALUE)
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->tracking, 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->tracking && !t->track) {
ast_reentrancy_init(&t->track);
}
lt = t->track;
if (t->tracking) {
#ifdef HAVE_BKTR
ast_reentrancy_lock(lt);
if (lt->reentrancy != AST_MAX_REENTRANCY) {
ast_bt_get_addresses(<->backtrace[lt->reentrancy]);
bt = <->backtrace[lt->reentrancy];
}
ast_reentrancy_unlock(lt);
ast_store_lock_info(AST_MUTEX, filename, lineno, func, mutex_name, t, bt);
#else
ast_store_lock_info(AST_MUTEX, filename, lineno, func, mutex_name, t);
#endif
}
#endif /* DEBUG_THREADS */
res = pthread_mutex_trylock(&t->mutex);
#ifdef DEBUG_THREADS
if (t->tracking && !res) {
ast_reentrancy_lock(lt);
if (lt->reentrancy < AST_MAX_REENTRANCY) {
lt->file[lt->reentrancy] = filename;
lt->lineno[lt->reentrancy] = lineno;
lt->func[lt->reentrancy] = func;
lt->thread[lt->reentrancy] = pthread_self();
lt->reentrancy++;
} else {
__ast_mutex_logger("%s line %d (%s): '%s' really deep reentrancy!\n",
filename, lineno, func, mutex_name);
}
ast_reentrancy_unlock(lt);
if (t->tracking) {
ast_mark_lock_acquired(t);
}
} else if (t->tracking) {
ast_mark_lock_failed(t);
}
#endif /* DEBUG_THREADS */
return res;
}
int __ast_rwlock_timedwrlock(const char *filename, int line, const char *func, ast_rwlock_t *t, const char *name,
const struct timespec *abs_timeout)
{
int res;
#ifdef DEBUG_THREADS
struct ast_lock_track *lt;
int canlog = strcmp(filename, "logger.c") & t->tracking;
#ifdef HAVE_BKTR
struct ast_bt *bt = NULL;
#endif
#if defined(AST_MUTEX_INIT_W_CONSTRUCTORS) && defined(CAN_COMPARE_MUTEX_TO_INIT_VALUE)
if ((t->lock) == ((pthread_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(t->tracking, filename, line, func, name, t);
if ((t->lock) == ((pthread_rwlock_t) __AST_RWLOCK_INIT_VALUE)) {
__ast_mutex_logger("%s line %d (%s): Error: rwlock '%s' is uninitialized and unable to initialize.\n",
filename, line, func, name);
return res;
}
}
#endif /* AST_MUTEX_INIT_W_CONSTRUCTORS */
if (t->tracking && !t->track) {
ast_reentrancy_init(&t->track);
}
lt = t->track;
if (t->tracking) {
#ifdef HAVE_BKTR
ast_reentrancy_lock(lt);
if (lt->reentrancy != AST_MAX_REENTRANCY) {
ast_bt_get_addresses(<->backtrace[lt->reentrancy]);
bt = <->backtrace[lt->reentrancy];
}
ast_reentrancy_unlock(lt);
ast_store_lock_info(AST_WRLOCK, filename, line, func, name, t, bt);
#else
ast_store_lock_info(AST_WRLOCK, filename, line, func, name, t);
#endif
}
#endif /* DEBUG_THREADS */
#ifdef HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK
res = pthread_rwlock_timedwrlock(&t->lock, abs_timeout);
#else
do {
struct timeval _start = ast_tvnow(), _diff;
for (;;) {
if (!(res = pthread_rwlock_trywrlock(&t->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 && t->tracking) {
ast_reentrancy_lock(lt);
if (lt->reentrancy < AST_MAX_REENTRANCY) {
lt->file[lt->reentrancy] = filename;
lt->lineno[lt->reentrancy] = line;
lt->func[lt->reentrancy] = func;
lt->thread[lt->reentrancy] = pthread_self();
lt->reentrancy++;
}
ast_reentrancy_unlock(lt);
if (t->tracking) {
ast_mark_lock_acquired(t);
}
} else if (t->tracking) {
#ifdef HAVE_BKTR
if (lt->reentrancy) {
ast_reentrancy_lock(lt);
bt = <->backtrace[lt->reentrancy-1];
ast_reentrancy_unlock(lt);
} else {
bt = NULL;
}
if (t->tracking) {
ast_remove_lock_info(t, bt);
}
#else
if (t->tracking) {
ast_remove_lock_info(t);
}
#endif
}
if (res) {
__ast_mutex_logger("%s line %d (%s): Error obtaining read lock: %s\n",
filename, line, func, strerror(res));
DO_THREAD_CRASH;
}
#endif /* DEBUG_THREADS */
return res;
}
int __ast_rwlock_wrlock(const char *filename, int line, const char *func, ast_rwlock_t *t, const char *name)
{
int res;
#ifdef DEBUG_THREADS
struct ast_lock_track *lt = NULL;
int canlog = t->tracking && strcmp(filename, "logger.c");
#ifdef HAVE_BKTR
struct ast_bt *bt = NULL;
#endif
if (t->tracking) {
lt = ast_get_reentrancy(&t->track);
}
if (lt) {
#ifdef HAVE_BKTR
struct ast_bt tmp;
/* The implementation of backtrace() may have its own locks.
* Capture the backtrace outside of the reentrancy lock to
* avoid deadlocks. See ASTERISK-22455. */
ast_bt_get_addresses(&tmp);
ast_reentrancy_lock(lt);
if (lt->reentrancy < AST_MAX_REENTRANCY) {
lt->backtrace[lt->reentrancy] = tmp;
bt = <->backtrace[lt->reentrancy];
}
ast_reentrancy_unlock(lt);
ast_store_lock_info(AST_WRLOCK, filename, line, func, name, t, bt);
#else
ast_store_lock_info(AST_WRLOCK, filename, line, func, name, t);
#endif
}
#endif /* DEBUG_THREADS */
#if defined(DETECT_DEADLOCKS) && defined(DEBUG_THREADS)
{
time_t seconds = time(NULL);
time_t wait_time, reported_wait = 0;
do {
res = pthread_rwlock_trywrlock(&t->lock);
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 writelock '%s'?\n",
filename, line, func, (int)wait_time, name);
if (lt) {
ast_reentrancy_lock(lt);
#ifdef HAVE_BKTR
__dump_backtrace(<->backtrace[lt->reentrancy], canlog);
#endif
__ast_mutex_logger("%s line %d (%s): '%s' was locked here.\n",
lt->file[lt->reentrancy-1], lt->lineno[lt->reentrancy-1],
lt->func[lt->reentrancy-1], name);
#ifdef HAVE_BKTR
__dump_backtrace(<->backtrace[lt->reentrancy-1], canlog);
#endif
ast_reentrancy_unlock(lt);
}
reported_wait = wait_time;
}
usleep(200);
}
} while (res == EBUSY);
}
#else /* !DETECT_DEADLOCKS || !DEBUG_THREADS */
res = pthread_rwlock_wrlock(&t->lock);
#endif /* !DETECT_DEADLOCKS || !DEBUG_THREADS */
#ifdef DEBUG_THREADS
if (!res && lt) {
ast_reentrancy_lock(lt);
if (lt->reentrancy < AST_MAX_REENTRANCY) {
lt->file[lt->reentrancy] = filename;
lt->lineno[lt->reentrancy] = line;
lt->func[lt->reentrancy] = func;
lt->thread[lt->reentrancy] = pthread_self();
lt->reentrancy++;
}
ast_reentrancy_unlock(lt);
ast_mark_lock_acquired(t);
} else if (lt) {
#ifdef HAVE_BKTR
if (lt->reentrancy) {
ast_reentrancy_lock(lt);
bt = <->backtrace[lt->reentrancy-1];
ast_reentrancy_unlock(lt);
} else {
bt = NULL;
}
ast_remove_lock_info(t, bt);
#else
ast_remove_lock_info(t);
#endif
}
if (res) {
__ast_mutex_logger("%s line %d (%s): Error obtaining write lock: %s\n",
filename, line, 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
struct ast_lock_track *lt = NULL;
int canlog = t->tracking && strcmp(filename, "logger.c");
#ifdef HAVE_BKTR
struct ast_bt *bt = NULL;
#endif
if (t->tracking) {
lt = ast_get_reentrancy(&t->track);
}
if (lt) {
#ifdef HAVE_BKTR
struct ast_bt tmp;
/* The implementation of backtrace() may have its own locks.
* Capture the backtrace outside of the reentrancy lock to
* avoid deadlocks. See ASTERISK-22455. */
ast_bt_get_addresses(&tmp);
ast_reentrancy_lock(lt);
if (lt->reentrancy < AST_MAX_REENTRANCY) {
lt->backtrace[lt->reentrancy] = tmp;
bt = <->backtrace[lt->reentrancy];
}
ast_reentrancy_unlock(lt);
ast_store_lock_info(AST_MUTEX, filename, lineno, func, mutex_name, t, bt);
#else
ast_store_lock_info(AST_MUTEX, filename, lineno, func, mutex_name, t);
#endif
}
#endif /* DEBUG_THREADS */
res = pthread_mutex_trylock(&t->mutex);
#ifdef DEBUG_THREADS
if (lt && !res) {
ast_reentrancy_lock(lt);
if (lt->reentrancy < AST_MAX_REENTRANCY) {
lt->file[lt->reentrancy] = filename;
lt->lineno[lt->reentrancy] = lineno;
lt->func[lt->reentrancy] = func;
lt->thread[lt->reentrancy] = pthread_self();
lt->reentrancy++;
} else {
__ast_mutex_logger("%s line %d (%s): '%s' really deep reentrancy!\n",
filename, lineno, func, mutex_name);
}
ast_reentrancy_unlock(lt);
ast_mark_lock_acquired(t);
} else if (lt) {
ast_mark_lock_failed(t);
}
#endif /* DEBUG_THREADS */
return res;
}
int __ast_rwlock_timedwrlock(const char *filename, int line, const char *func, ast_rwlock_t *t, const char *name,
const struct timespec *abs_timeout)
{
int res;
#ifdef DEBUG_THREADS
struct ast_lock_track *lt = NULL;
int canlog = t->tracking && strcmp(filename, "logger.c");
#ifdef HAVE_BKTR
struct ast_bt *bt = NULL;
#endif
if (t->tracking) {
lt = ast_get_reentrancy(&t->track);
}
if (lt) {
#ifdef HAVE_BKTR
struct ast_bt tmp;
/* The implementation of backtrace() may have its own locks.
* Capture the backtrace outside of the reentrancy lock to
* avoid deadlocks. See ASTERISK-22455. */
ast_bt_get_addresses(&tmp);
ast_reentrancy_lock(lt);
if (lt->reentrancy < AST_MAX_REENTRANCY) {
lt->backtrace[lt->reentrancy] = tmp;
bt = <->backtrace[lt->reentrancy];
}
ast_reentrancy_unlock(lt);
ast_store_lock_info(AST_WRLOCK, filename, line, func, name, t, bt);
#else
ast_store_lock_info(AST_WRLOCK, filename, line, func, name, t);
#endif
}
#endif /* DEBUG_THREADS */
#ifdef HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK
res = pthread_rwlock_timedwrlock(&t->lock, abs_timeout);
#else
do {
struct timeval _now;
for (;;) {
if (!(res = pthread_rwlock_trywrlock(&t->lock))) {
break;
}
_now = ast_tvnow();
if (_now.tv_sec > abs_timeout->tv_sec || (_now.tv_sec == abs_timeout->tv_sec && _now.tv_usec * 1000 > abs_timeout->tv_nsec)) {
break;
}
usleep(1);
}
} while (0);
#endif
#ifdef DEBUG_THREADS
if (!res && lt) {
ast_reentrancy_lock(lt);
if (lt->reentrancy < AST_MAX_REENTRANCY) {
lt->file[lt->reentrancy] = filename;
lt->lineno[lt->reentrancy] = line;
lt->func[lt->reentrancy] = func;
lt->thread[lt->reentrancy] = pthread_self();
lt->reentrancy++;
}
ast_reentrancy_unlock(lt);
ast_mark_lock_acquired(t);
} else if (lt) {
#ifdef HAVE_BKTR
if (lt->reentrancy) {
ast_reentrancy_lock(lt);
bt = <->backtrace[lt->reentrancy-1];
ast_reentrancy_unlock(lt);
} else {
bt = NULL;
}
ast_remove_lock_info(t, bt);
#else
ast_remove_lock_info(t);
#endif
}
if (res) {
__ast_mutex_logger("%s line %d (%s): Error obtaining read lock: %s\n",
filename, line, func, strerror(res));
DO_THREAD_CRASH;
}
#endif /* DEBUG_THREADS */
return res;
}