Manual Pages  — PTHREAD_MUTEX_LOCK

pthread_mutex_lock – lock a mutex

LIBRARY SYNOPSIS DESCRIPTION RETURN VALUES ERRORS SEE ALSO STANDARDS

POSIX Threads Library (libpthread, -lpthread)

#include <pthread.h>

int
pthread_mutex_lock(pthread_mutex_t *mutex);

The pthread_mutex_lock() function locks mutex. If the mutex is already locked, the calling thread will block until the mutex becomes available.

If successful, pthread_mutex_lock() will return zero, otherwise an error number will be returned to indicate the error.

The pthread_mutex_lock() function will fail if:

[EINVAL]	The value specified by mutex is invalid.
[EDEADLK]	A deadlock would occur if the thread blocked waiting for mutex.
[EOWNERDEAD]	The argument mutex points to a robust mutex and the process containing the previous owning thread terminated while holding the mutex lock. The lock was granted to the caller and it is up to the new owner to make the state consistent.
[ENOTRECOVERABLE]	The state protected by the mutex is not recoverable.

The pthread_mutex_lock() function conforms to IEEE Std 1003.1-96 ("POSIX.1").