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PTHREAD_MUTEX_LOCK(3)	   BSD 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:

     [EBUSY]	   Currently mutex is locked by another thread.

     [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 9945-1:1996 ("POSIX").

MirOS BSD #10-current		July 30, 1998				     1

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