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PTHREAD_MUTEX_UNLOCK(3) FreeBSD Library Functions Manual
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.
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").
FreeBSD 14.0-RELEASE-p11 April 29, 2016 FreeBSD 14.0-RELEASE-p11