HardenedBSD/share/man/man3/pthread_mutex_lock.3
Poul-Henning Kamp 1fbdc08dfe I've put together man pages for the pthread_cleanup, pthread_cond, and
pthread_mutex routines. I've also tweaked pthread_create.3 to point to
pthread_cleanup_push(3) and pthread_cleanup_pop(3).

PR:		7450
Submitted by:	Brian Cully <shmit@kublai.com>
1998-07-31 09:09:19 +00:00

73 lines
2.5 KiB
Groff

.\" Copyright (c) 1997 Brian Cully <shmit@kublai.com>
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.Dd July 30, 1998
.Dt PTHREAD_MUTEX_LOCK 3
.Os BSD 4
.Sh NAME
.Nm pthread_mutex_lock
.Nd lock a mutex
.Sh SYNOPSIS
.Fd #include <pthread.h>
.Ft int
.Fn pthread_mutex_lock "pthread_mutex_t *mutex"
.Sh DESCRIPTION
The
.Fn pthread_mutex_lock
function locks
.Fa mutex .
If the mutex is already locked, the calling thread will block until the
mutex becomes available.
.Sh RETURN VALUES
If successful,
.Fn pthread_mutex_lock
will return zero, otherwise an error number will be returned to
indicate the error.
.Sh ERRORS
.Fn pthread_mutex_lock
will fail if:
.Bl -tag -width Er
.It Bq Er EINVAL
The value specified by
.Fa mutex
is invalid.
.It Bq Er EDEADLK
A deadlock would occur if the thread blocked waiting for
.Fa mutex .
.El
.Pp
.Sh SEE ALSO
.Xr pthread_mutex_unlock 3 ,
.Xr pthread_mutex_trylock 3 ,
.Xr pthread_mutex_init 3 ,
.Xr pthread_mutex_destroy 3
.Sh STANDARDS
.Fn pthread_mutex_lock
is expected to conform to IEEE
.Pq Dq Tn POSIX
Std 1003.1c when it is published.