.\"
.\" Sun Microsystems, Inc. gratefully acknowledges The Open Group for
.\" permission to reproduce portions of its copyrighted documentation.
.\" Original documentation from The Open Group can be obtained online at
.\" http://www.opengroup.org/bookstore/.
.\"
.\" The Institute of Electrical and Electronics Engineers and The Open
.\" Group, have given us permission to reprint portions of their
.\" documentation.
.\"
.\" In the following statement, the phrase ``this text'' refers to portions
.\" of the system documentation.
.\"
.\" Portions of this text are reprinted and reproduced in electronic form
.\" in the SunOS Reference Manual, from IEEE Std 1003.1, 2004 Edition,
.\" Standard for Information Technology -- Portable Operating System
.\" Interface (POSIX), The Open Group Base Specifications Issue 6,
.\" Copyright (C) 2001-2004 by the Institute of Electrical and Electronics
.\" Engineers, Inc and The Open Group.  In the event of any discrepancy
.\" between these versions and the original IEEE and The Open Group
.\" Standard, the original IEEE and The Open Group Standard is the referee
.\" document.  The original Standard can be obtained online at
.\" http://www.opengroup.org/unix/online.html.
.\"
.\" This notice shall appear on any product containing this material.
.\"
.\" The contents of this file are subject to the terms of the
.\" Common Development and Distribution License (the "License").
.\" You may not use this file except in compliance with the License.
.\"
.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
.\" or http://www.opensolaris.org/os/licensing.
.\" See the License for the specific language governing permissions
.\" and limitations under the License.
.\"
.\" When distributing Covered Code, include this CDDL HEADER in each
.\" file and include the License file at usr/src/OPENSOLARIS.LICENSE.
.\" If applicable, add the following below this CDDL HEADER, with the
.\" fields enclosed by brackets "[]" replaced with your own identifying
.\" information: Portions Copyright [yyyy] [name of copyright owner]
.\"
.\"
.\" Copyright 1991, 1992, 1994, The X/Open Company Ltd.
.\" Portions Copyright (c) 1995 IEEE.  All Rights Reserved.
.\" Copyright (c) 2001, The IEEE and The Open Group.  All Rights Reserved.
.\" Copyright (c) 2008, Sun Microsystems, Inc.  All Rights Reserved.
.\"
.TH PTHREAD_CLEANUP_POP 3C "Oct 4, 2005"
.SH NAME
pthread_cleanup_pop \- pop a thread cancellation cleanup handler
.SH SYNOPSIS
.LP
.nf
cc -mt [ \fIflag\fR... ] \fIfile\fR... -lpthread [ \fIlibrary\fR... ]
#include <pthread.h>

\fBvoid\fR \fBpthread_cleanup_pop\fR(\fBint\fR \fIexecute\fR);
.fi

.SH DESCRIPTION
.sp
.LP
The \fBpthread_cleanup_pop()\fR function removes the cleanup handler routine at
the top of the cancellation cleanup stack of the calling thread and executes it
if \fIexecute\fR is non-zero.
.sp
.LP
When the thread calls \fBpthread_cleanup_pop()\fR with a non-zero \fIexecute\fR
argument, the argument at the top of the stack is popped and executed. An
argument of  \fB0\fR pops the handler without executing it.
.sp
.LP
The \fBpthread_cleanup_push\fR(3C) and \fBpthread_cleanup_pop()\fR functions
can be implemented as macros. The application must ensure that they appear as
statements, and in pairs within the same lexical scope (that is, the
\fBpthread_cleanup_push()\fR macro can be thought to expand to a token list
whose first token is '{' with \fBpthread_cleanup_pop()\fR expanding to a token
list whose last token is the corresponding '}').
.sp
.LP
The effect of the use of \fBreturn\fR, \fBbreak\fR, \fBcontinue\fR, and
\fBgoto\fR to prematurely leave a code block described by a pair of
\fBpthread_cleanup_push()\fR and \fBpthread_cleanup_pop()\fR function calls is
undefined.
.sp
.LP
Using \fBlongjmp()\fR or \fBsiglongjmp()\fR to jump into or out of a push/pop
pair can result in either the matching push or the matching pop statement not
getting executed.
.SH RETURN VALUES
.sp
.LP
The \fBpthread_cleanup_pop()\fR function returns no value.
.SH ERRORS
.sp
.LP
No errors are defined.
.sp
.LP
The \fBpthread_cleanup_pop()\fR function will not return an error code of
\fBEINTR\fR.
.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(5) for descriptions of the following attributes:
.sp

.sp
.TS
box;
c | c
l | l .
ATTRIBUTE TYPE	ATTRIBUTE VALUE
_
Interface Stability	Standard
_
MT-Level	MT-Safe
.TE

.SH SEE ALSO
.sp
.LP
\fBpthread_cancel\fR(3C), \fBpthread_cleanup_push\fR(3C),
\fBpthread_exit\fR(3C), \fBpthread_join\fR(3C),
\fBpthread_setcancelstate\fR(3C), \fBpthread_setcanceltype\fR(3C),
\fBpthread_testcancel\fR(3C), \fBsetjmp\fR(3C), \fBattributes\fR(5),
\fBcancellation\fR(5), \fBcondition\fR(5), \fBstandards\fR(5)
.SH NOTES
.sp
.LP
See \fBcancellation\fR(5) for a discussion of cancellation concepts.