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// SPDX-License-Identifier: GPL-3.0-or-later
#include "../libnetdata.h"
// ----------------------------------------------------------------------------
// automatic thread cancelability management, based on locks
static __thread int netdata_thread_first_cancelability = 0;
static __thread int netdata_thread_lock_cancelability = 0;
inline void netdata_thread_disable_cancelability(void) {
int old;
int ret = pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old);
if(ret != 0)
error("THREAD_CANCELABILITY: pthread_setcancelstate() on thread %s returned error %d", netdata_thread_tag(), ret);
else {
if(!netdata_thread_lock_cancelability)
netdata_thread_first_cancelability = old;
netdata_thread_lock_cancelability++;
}
}
inline void netdata_thread_enable_cancelability(void) {
if(netdata_thread_lock_cancelability < 1) {
error("THREAD_CANCELABILITY: netdata_thread_enable_cancelability(): invalid thread cancelability count %d on thread %s - results will be undefined - please report this!", netdata_thread_lock_cancelability, netdata_thread_tag());
}
else if(netdata_thread_lock_cancelability == 1) {
int old = 1;
int ret = pthread_setcancelstate(netdata_thread_first_cancelability, &old);
if(ret != 0)
error("THREAD_CANCELABILITY: pthread_setcancelstate() on thread %s returned error %d", netdata_thread_tag(), ret);
else {
if(old != PTHREAD_CANCEL_DISABLE)
error("THREAD_CANCELABILITY: netdata_thread_enable_cancelability(): old thread cancelability on thread %s was changed, expected DISABLED (%d), found %s (%d) - please report this!", netdata_thread_tag(), PTHREAD_CANCEL_DISABLE, (old == PTHREAD_CANCEL_ENABLE)?"ENABLED":"UNKNOWN", old);
}
netdata_thread_lock_cancelability = 0;
}
else
netdata_thread_lock_cancelability--;
}
// ----------------------------------------------------------------------------
// mutex
int __netdata_mutex_init(netdata_mutex_t *mutex) {
int ret = pthread_mutex_init(mutex, NULL);
if(unlikely(ret != 0))
error("MUTEX_LOCK: failed to initialize (code %d).", ret);
return ret;
}
int __netdata_mutex_lock(netdata_mutex_t *mutex) {
netdata_thread_disable_cancelability();
int ret = pthread_mutex_lock(mutex);
if(unlikely(ret != 0)) {
netdata_thread_enable_cancelability();
error("MUTEX_LOCK: failed to get lock (code %d)", ret);
}
return ret;
}
int __netdata_mutex_trylock(netdata_mutex_t *mutex) {
netdata_thread_disable_cancelability();
int ret = pthread_mutex_trylock(mutex);
if(ret != 0)
netdata_thread_enable_cancelability();
return ret;
}
int __netdata_mutex_unlock(netdata_mutex_t *mutex) {
int ret = pthread_mutex_unlock(mutex);
if(unlikely(ret != 0))
error("MUTEX_LOCK: failed to unlock (code %d).", ret);
else
netdata_thread_enable_cancelability();
return ret;
}
int netdata_mutex_init_debug( const char *file, const char *function, const unsigned long line, netdata_mutex_t *mutex) {
usec_t start = 0;
(void)start;
if(unlikely(debug_flags & D_LOCKS)) {
start = now_boottime_usec();
debug(D_LOCKS, "MUTEX_LOCK: netdata_mutex_init(0x%p) from %lu@%s, %s()", mutex, line, file, function);
}
int ret = __netdata_mutex_init(mutex);
debug(D_LOCKS, "MUTEX_LOCK: netdata_mutex_init(0x%p) = %d in %llu usec, from %lu@%s, %s()", mutex, ret, now_boottime_usec() - start, line, file, function);
return ret;
}
int netdata_mutex_lock_debug( const char *file, const char *function, const unsigned long line, netdata_mutex_t *mutex) {
usec_t start = 0;
(void)start;
if(unlikely(debug_flags & D_LOCKS)) {
start = now_boottime_usec();
debug(D_LOCKS, "MUTEX_LOCK: netdata_mutex_lock(0x%p) from %lu@%s, %s()", mutex, line, file, function);
}
int ret = __netdata_mutex_lock(mutex);
debug(D_LOCKS, "MUTEX_LOCK: netdata_mutex_lock(0x%p) = %d in %llu usec, from %lu@%s, %s()", mutex, ret, now_boottime_usec() - start, line, file, function);
return ret;
}
int netdata_mutex_trylock_debug( const char *file, const char *function, const unsigned long line, netdata_mutex_t *mutex) {
usec_t start = 0;
(void)start;
if(unlikely(debug_flags & D_LOCKS)) {
start = now_boottime_usec();
debug(D_LOCKS, "MUTEX_LOCK: netdata_mutex_trylock(0x%p) from %lu@%s, %s()", mutex, line, file, function);
}
int ret = __netdata_mutex_trylock(mutex);
debug(D_LOCKS, "MUTEX_LOCK: netdata_mutex_trylock(0x%p) = %d in %llu usec, from %lu@%s, %s()", mutex, ret, now_boottime_usec() - start, line, file, function);
return ret;
}
int netdata_mutex_unlock_debug( const char *file, const char *function, const unsigned long line, netdata_mutex_t *mutex) {
usec_t start = 0;
(void)start;
if(unlikely(debug_flags & D_LOCKS)) {
start = now_boottime_usec();
debug(D_LOCKS, "MUTEX_LOCK: netdata_mutex_unlock(0x%p) from %lu@%s, %s()", mutex, line, file, function);
}
int ret = __netdata_mutex_unlock(mutex);
debug(D_LOCKS, "MUTEX_LOCK: netdata_mutex_unlock(0x%p) = %d in %llu usec, from %lu@%s, %s()", mutex, ret, now_boottime_usec() - start, line, file, function);
return ret;
}
// ----------------------------------------------------------------------------
// r/w lock
int __netdata_rwlock_destroy(netdata_rwlock_t *rwlock) {
int ret = pthread_rwlock_destroy(rwlock);
if(unlikely(ret != 0))
error("RW_LOCK: failed to destroy lock (code %d)", ret);
return ret;
}
int __netdata_rwlock_init(netdata_rwlock_t *rwlock) {
int ret = pthread_rwlock_init(rwlock, NULL);
if(unlikely(ret != 0))
error("RW_LOCK: failed to initialize lock (code %d)", ret);
return ret;
}
int __netdata_rwlock_rdlock(netdata_rwlock_t *rwlock) {
netdata_thread_disable_cancelability();
int ret = pthread_rwlock_rdlock(rwlock);
if(unlikely(ret != 0)) {
netdata_thread_enable_cancelability();
error("RW_LOCK: failed to obtain read lock (code %d)", ret);
}
return ret;
}
int __netdata_rwlock_wrlock(netdata_rwlock_t *rwlock) {
netdata_thread_disable_cancelability();
int ret = pthread_rwlock_wrlock(rwlock);
if(unlikely(ret != 0)) {
error("RW_LOCK: failed to obtain write lock (code %d)", ret);
netdata_thread_enable_cancelability();
}
return ret;
}
int __netdata_rwlock_unlock(netdata_rwlock_t *rwlock) {
int ret = pthread_rwlock_unlock(rwlock);
if(unlikely(ret != 0))
error("RW_LOCK: failed to release lock (code %d)", ret);
else
netdata_thread_enable_cancelability();
return ret;
}
int __netdata_rwlock_tryrdlock(netdata_rwlock_t *rwlock) {
netdata_thread_disable_cancelability();
int ret = pthread_rwlock_tryrdlock(rwlock);
if(ret != 0)
netdata_thread_enable_cancelability();
return ret;
}
int __netdata_rwlock_trywrlock(netdata_rwlock_t *rwlock) {
netdata_thread_disable_cancelability();
int ret = pthread_rwlock_trywrlock(rwlock);
if(ret != 0)
netdata_thread_enable_cancelability();
return ret;
}
int netdata_rwlock_destroy_debug( const char *file, const char *function, const unsigned long line, netdata_rwlock_t *rwlock) {
usec_t start = 0;
(void)start;
if(unlikely(debug_flags & D_LOCKS)) {
start = now_boottime_usec();
debug(D_LOCKS, "RW_LOCK: netdata_rwlock_destroy(0x%p) from %lu@%s, %s()", rwlock, line, file, function);
}
int ret = __netdata_rwlock_destroy(rwlock);
debug(D_LOCKS, "RW_LOCK: netdata_rwlock_destroy(0x%p) = %d in %llu usec, from %lu@%s, %s()", rwlock, ret, now_boottime_usec() - start, line, file, function);
return ret;
}
int netdata_rwlock_init_debug( const char *file, const char *function, const unsigned long line, netdata_rwlock_t *rwlock) {
usec_t start = 0;
(void)start;
if(unlikely(debug_flags & D_LOCKS)) {
start = now_boottime_usec();
debug(D_LOCKS, "RW_LOCK: netdata_rwlock_init(0x%p) from %lu@%s, %s()", rwlock, line, file, function);
}
int ret = __netdata_rwlock_init(rwlock);
debug(D_LOCKS, "RW_LOCK: netdata_rwlock_init(0x%p) = %d in %llu usec, from %lu@%s, %s()", rwlock, ret, now_boottime_usec() - start, line, file, function);
return ret;
}
int netdata_rwlock_rdlock_debug( const char *file, const char *function, const unsigned long line, netdata_rwlock_t *rwlock) {
usec_t start = 0;
(void)start;
if(unlikely(debug_flags & D_LOCKS)) {
start = now_boottime_usec();
debug(D_LOCKS, "RW_LOCK: netdata_rwlock_rdlock(0x%p) from %lu@%s, %s()", rwlock, line, file, function);
}
int ret = __netdata_rwlock_rdlock(rwlock);
debug(D_LOCKS, "RW_LOCK: netdata_rwlock_rdlock(0x%p) = %d in %llu usec, from %lu@%s, %s()", rwlock, ret, now_boottime_usec() - start, line, file, function);
return ret;
}
int netdata_rwlock_wrlock_debug( const char *file, const char *function, const unsigned long line, netdata_rwlock_t *rwlock) {
usec_t start = 0;
(void)start;
if(unlikely(debug_flags & D_LOCKS)) {
start = now_boottime_usec();
debug(D_LOCKS, "RW_LOCK: netdata_rwlock_wrlock(0x%p) from %lu@%s, %s()", rwlock, line, file, function);
}
int ret = __netdata_rwlock_wrlock(rwlock);
debug(D_LOCKS, "RW_LOCK: netdata_rwlock_wrlock(0x%p) = %d in %llu usec, from %lu@%s, %s()", rwlock, ret, now_boottime_usec() - start, line, file, function);
return ret;
}
int netdata_rwlock_unlock_debug( const char *file, const char *function, const unsigned long line, netdata_rwlock_t *rwlock) {
usec_t start = 0;
(void)start;
if(unlikely(debug_flags & D_LOCKS)) {
start = now_boottime_usec();
debug(D_LOCKS, "RW_LOCK: netdata_rwlock_unlock(0x%p) from %lu@%s, %s()", rwlock, line, file, function);
}
int ret = __netdata_rwlock_unlock(rwlock);
debug(D_LOCKS, "RW_LOCK: netdata_rwlock_unlock(0x%p) = %d in %llu usec, from %lu@%s, %s()", rwlock, ret, now_boottime_usec() - start, line, file, function);
return ret;
}
int netdata_rwlock_tryrdlock_debug( const char *file, const char *function, const unsigned long line, netdata_rwlock_t *rwlock) {
usec_t start = 0;
(void)start;
if(unlikely(debug_flags & D_LOCKS)) {
start = now_boottime_usec();
debug(D_LOCKS, "RW_LOCK: netdata_rwlock_tryrdlock(0x%p) from %lu@%s, %s()", rwlock, line, file, function);
}
int ret = __netdata_rwlock_tryrdlock(rwlock);
debug(D_LOCKS, "RW_LOCK: netdata_rwlock_tryrdlock(0x%p) = %d in %llu usec, from %lu@%s, %s()", rwlock, ret, now_boottime_usec() - start, line, file, function);
return ret;
}
int netdata_rwlock_trywrlock_debug( const char *file, const char *function, const unsigned long line, netdata_rwlock_t *rwlock) {
usec_t start = 0;
(void)start;
if(unlikely(debug_flags & D_LOCKS)) {
start = now_boottime_usec();
debug(D_LOCKS, "RW_LOCK: netdata_rwlock_trywrlock(0x%p) from %lu@%s, %s()", rwlock, line, file, function);
}
int ret = __netdata_rwlock_trywrlock(rwlock);
debug(D_LOCKS, "RW_LOCK: netdata_rwlock_trywrlock(0x%p) = %d in %llu usec, from %lu@%s, %s()", rwlock, ret, now_boottime_usec() - start, line, file, function);
return ret;
}
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