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Note that when calling pthread_cond_broadcast/signal, the same mutex as

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passed to wait/timedwait must be held.
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ad 2008-05-26 02:16:48 +00:00
parent 2dad86041d
commit 3ad4fb5234
1 changed files with 18 additions and 3 deletions
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21
lib/libpthread/pthread_cond_broadcast.3
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@ -1,6 +1,6 @@
.\" $NetBSD: pthread_cond_broadcast.3,v 1.5 2008/05/04 19:43:05 martin Exp $
.\" $NetBSD: pthread_cond_broadcast.3,v 1.6 2008/05/26 02:16:48 ad Exp $
.\"
.\" Copyright (c) 2002 The NetBSD Foundation, Inc.
.\" Copyright (c) 2002, 2008 The NetBSD Foundation, Inc.
.\" All rights reserved.
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
@ -51,7 +51,7 @@
.\"
.\" $FreeBSD: src/lib/libpthread/man/pthread_cond_broadcast.3,v 1.11 2002/09/16 19:29:28 mini Exp $
.\"
.Dd January 30, 2003
.Dd May 26, 2008
.Dt PTHREAD_COND_BROADCAST 3
.Os
.Sh NAME
@ -86,6 +86,21 @@ If no threads are waiting on
the
.Fn pthread_cond_signal
function has no effect.
.Pp
When calling
.Fn pthread_cond_wait
and/or
.Fn pthread_cond_timedwait ,
a temporary binding is established between the condition variable
.Fa cond
and a caller-supplied mutex.
.Pp
The same mutex must be held while calling
.Fn pthread_cond_broadcast
and
.Fn pthread_cond_signal .
Neither function enforces this requirement, but if the mutex is not
held the resulting behaviour is undefined.
.Sh RETURN VALUES
If successful, the
.Fn pthread_cond_broadcast