NAME
pthread_mutex_unlock —
unlock a mutex
LIBRARY
library “libpthread”
SYNOPSIS
#include
<pthread.h>
int
pthread_mutex_unlock(pthread_mutex_t
*mutex);
DESCRIPTION
If the current thread holds the lock on mutex, then thepthread_mutex_unlock()
function unlocks mutex.
If the argument pointed by the
mutex is a robust mutex in the inconsistent state, and
the call to
pthread_mutex_consistent()
function was not done prior to unlocking, further locking attempts on the
mutex mutex are denied and locking functions return
ENOTRECOVERABLE error.
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.
SEE ALSO
pthread_mutex_destroy(3), pthread_mutex_init(3), pthread_mutex_lock(3), pthread_mutex_trylock(3)
STANDARDS
The pthread_mutex_unlock() function
conforms to ISO/IEC 9945-1:1996
(“POSIX.1”).