PTHREAD_MUTEX_UNLOCK(3) Library Functions Manual PTHREAD_MUTEX_UNLOCK(3)

pthread_mutex_unlockunlock a mutex

#include <pthread.h>

int
pthread_mutex_unlock(pthread_mutex_t *mutex);

If the current thread holds the lock on mutex, then the () function unlocks mutex.

Calling () with a mutex that the calling thread does not hold will result in undefined behavior.

If successful, pthread_mutex_unlock() will return zero, otherwise an error number will be returned to indicate the error.

The pthread_mutex_unlock() function will fail if:

[]
The value specified by mutex is invalid.
[]
The current thread does not hold a lock on mutex.

pthread_mutex_destroy(3), pthread_mutex_init(3), pthread_mutex_lock(3), pthread_mutex_trylock(3)

The pthread_mutex_unlock() function conforms to ISO/IEC 9945-1:1996 (“POSIX.1”).

July 30, 1998 Mac OS X 12