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pthread_mutex_unlock(3)  BSD Library Functions Manual  pthread_mutex_unlock(3)


NAME

     pthread_mutex_unlock -- unlock a mutex


SYNOPSIS

     #include <pthread.h>

     int
     pthread_mutex_unlock(pthread_mutex_t *mutex);


DESCRIPTION

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

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


RETURN VALUES

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


ERRORS

     pthread_mutex_unlock() will fail if:

     [EINVAL]           The value specified by mutex is invalid.

     [EPERM]            The current thread does not hold a lock on mutex.


SEE ALSO

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


STANDARDS

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

BSD                              July 30, 1998                             BSD

Mac OS X 10.8 - Generated Thu Aug 30 05:57:17 CDT 2012
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