PTHREAD_MUTEX_TRYLOCK(3)  OpenBSD Programmer's Manual PTHREAD_MUTEX_TRYLOCK(3)

NAME
     pthread_mutex_trylock - attempt to lock a mutex without blocking



SYNOPSIS
     #include <pthread.h>

     int
     pthread_mutex_trylock(pthread_mutex_t *mutex);

DESCRIPTION
     The pthread_mutex_trylock() 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.

RETURN VALUES
     If successful, pthread_mutex_trylock() will return zero, otherwise an er-
     ror number will be returned to indicate the error.

ERRORS
     pthread_mutex_trylock() will fail if:

     [EINVAL]      The value specified by mutex is invalid.

     [EBUSY]       mutex is already locked.

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

STANDARDS
     pthread_mutex_trylock() conforms to ISO/IEC 9945-1 ANSI/IEEE (``POSIX'')
     Std 1003.1 Second Edition 1996-07-12.

OpenBSD 2.6                      July 30, 1998                               1