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pthread_mutex_trylock(3) BSD Library Functions 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
     error number will be returned to indicate the error.


ERRORS

     The pthread_mutex_trylock() function 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

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

BSD                              July 30, 1998                             BSD

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