PTHREAD_MUTEX_LOCK(3)     OpenBSD Programmer's Manual    PTHREAD_MUTEX_LOCK(3)

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
     pthread_mutex_lock() 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
     pthread_mutex_lock() conforms to ISO/IEC 9945-1 ANSI/IEEE (``POSIX'') Std
     1003.1 Second Edition 1996-07-12.

OpenBSD 2.6                      July 30, 1998                               1