PTHREAD_MUTEX_UNLOCK(3) |
FreeBSD Library Functions Manual |
PTHREAD_MUTEX_UNLOCK(3) |
NAME
pthread_mutex_unlock —
unlock a mutex
LIBRARY
POSIX Threads Library (libpthread, -lpthread)
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.
RETURN VALUES
If successful,
pthread_mutex_unlock() will return zero, otherwise an error number will be returned to indicate the error.
ERRORS
The
pthread_mutex_unlock() function will fail if:
-
[
EINVAL]
-
The value specified by
mutex is invalid.
-
[
EPERM]
-
The current thread does not hold a lock on
mutex.
STANDARDS
The
pthread_mutex_unlock() function conforms to ISO/IEC 9945-1:1996 (“POSIX.1”).