some more information, based on a diff by sven falempin

diff --git a/lib/libpthread/man/pthread_mutex_init.3 b/lib/libpthread/man/pthread_mutex_init.3
index 5567248..a4f66a3 100644 (file)
--- a/lib/libpthread/man/pthread_mutex_init.3
+++ b/lib/libpthread/man/pthread_mutex_init.3
@@ -1,4 +1,4 @@
-.\" $OpenBSD: pthread_mutex_init.3,v 1.12 2013/06/05 03:44:50 tedu Exp $
+.\" $OpenBSD: pthread_mutex_init.3,v 1.13 2014/01/03 15:35:23 tedu Exp $
 .\"
 .\" Copyright (c) 1997 Brian Cully <shmit@kublai.com>
 .\" All rights reserved.
@@ -29,7 +29,7 @@
 .\"
 .\" $FreeBSD: pthread_mutex_init.3,v 1.6 1999/08/28 00:03:07 peter Exp $
 .\"
-.Dd $Mdocdate: June 5 2013 $
+.Dd $Mdocdate: January 3 2014 $
 .Dt PTHREAD_MUTEX_INIT 3
 .Os
 .Sh NAME
@@ -48,7 +48,13 @@ If
 .Fa attr
 is
 .Dv NULL
-the default attributes are used.
+the default attributes are used, otherwise
+.Fa attr
+should be initialized by calling
+.Xr pthread_mutexattr_init 3 .
+.Pp
+A mutex may also be initialized by assignment with the macro
+PTHREAD_MUTEX_INITIALIZER.
 .Sh RETURN VALUES
 If successful,
 .Fn pthread_mutex_init
@@ -67,6 +73,7 @@ is invalid.
 The process cannot allocate enough memory to create another mutex.
 .El
 .Sh SEE ALSO
+.Xr pthread_mutexattr_init 3 ,
 .Xr pthread_mutex_destroy 3 ,
 .Xr pthread_mutex_lock 3 ,
 .Xr pthread_mutex_unlock 3