pthread_mutex_unlock3
Unlock a mutex
Usage
#include <pthread.h>
int
pthread_mutex_unlock(pthread_mutex_t *mutex);
Library
POSIX Threads Library (libpthread, -lpthread)
Overview
If the current thread holds the lock on mutex, then the pthread_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.
Releases
79 releases since FreeBSD 2.2.8-RELEASE; the text changed 43 times.