PTHREAD_MUTEX_TRYLOCK(3) Library Functions Manual PTHREAD_MUTEX_TRYLOCK(3)

pthread_mutex_trylockattempt to lock a mutex without blocking

#include <pthread.h>

int
pthread_mutex_trylock(pthread_mutex_t *mutex);

The () function locks mutex. If the mutex is already locked, pthread_mutex_trylock() will not block waiting for the mutex, but will return an error condition.

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

The pthread_mutex_trylock() function will fail if:

[]
The value specified by mutex is invalid.
[]
Mutex is already locked.

pthread_mutex_destroy(3), pthread_mutex_init(3), pthread_mutex_lock(3), pthread_mutex_unlock(3)

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

July 30, 1998 Mac OS X 12