pthread_mutex_unlock man page on Darwin
[printable version]
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
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