NAME

pthread_mutex_lock — lock a mutex

SYNOPSIS

#include <pthread.h>

int
pthread_mutex_lock(pthread_mutex_t *mutex);

DESCRIPTION

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

RETURN VALUES

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

ERRORS

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.

SEE ALSO

pthread_mutex_destroy(3), pthread_mutex_init(3), pthread_mutex_trylock(3), pthread_mutex_unlock(3)

STANDARDS

The pthread_mutex_lock() function conforms to ISO/IEC 9945-1:1996 (“POSIX.1”).