PTHREAD_MUTEX_TRYLO... FreeBSD Library Functions Manual PTHREAD_MUTEX_TRYLO...

NAME    [Toc]    [Back]

     pthread_mutex_trylock -- attempt to lock a mutex without blocking

LIBRARY    [Toc]    [Back]

     Reentrant C Library (libc_r, -lc_r)

SYNOPSIS    [Toc]    [Back]

     #include <pthread.h>

     int
     pthread_mutex_trylock(pthread_mutex_t *mutex);

DESCRIPTION    [Toc]    [Back]

     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    [Toc]    [Back]

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

ERRORS    [Toc]    [Back]

     The pthread_mutex_trylock() function will fail if:

     [EINVAL]		The value specified by mutex is invalid.

     [EBUSY]		Mutex is already locked.

SEE ALSO    [Toc]    [Back]

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

STANDARDS    [Toc]    [Back]

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


FreeBSD 5.2.1			 July 30, 1998			 FreeBSD 5.2.1