.\"   Copyright (C) 1996-1999 Free Software Foundation, Inc.
.\"
.\"   Permission is granted to make and distribute verbatim copies of
.\" this manual provided the copyright notice and this permission notice are
.\" preserved on all copies.
.\"
.\"   Permission is granted to copy and distribute modified versions of
.\" this manual under the conditions for verbatim copying, provided that
.\" the entire resulting derived work is distributed under the terms of a
.\" permission notice identical to this one.
.\"
.\"   Permission is granted to copy and distribute translations of this
.\" manual into another language, under the above conditions for modified
.\" versions, except that this permission notice may be stated in a
.\" translation approved by the Foundation.
.\"
.\" Copyright (C) 1996 Xavier Leroy.
.\"
.\" Japanese Version Copyright (C) 2002-2003 Suzuki Takashi
.\"         all rights reserved.
.\" Translated Tue Dec 31 21:07:33 JST 2002
.\"         by Suzuki Takashi.
.\"
.\"WORD:    cleanup handler     ꡼󥢥åץϥɥ
.\"WORD:    cancellation        ä
.\"WORD:    stack-like          å
.\"WORD:    non-portable extension  ݡ֥Ǥʤĥ
.\"WORD:    cancellation type   ä
.\"WORD:    deferred            ʼäΡٱ
.\"WORD:    asynchronous        ʼäΡƱ
.\"WORD:    cancellation mode   ä
.\"
.\"
.TH PTHREAD_CLEANUP 3 LinuxThreads


.SH ̾
pthread_cleanup_push, pthread_cleanup_pop, pthread_cleanup_push_defer_np, pthread_cleanup_pop_restore_np 
\- ꡼󥢥åץϥɥϿӺ

.SH 
.B #include <pthread.h>

.BI "void pthread_cleanup_push(void (*" routine ") (void *), void *" arg ");"

.BI "void pthread_cleanup_pop(int " execute ");"

.BI "void pthread_cleanup_push_defer_np(void (*" routine ") (void *), void *" arg ");"

.BI "void pthread_cleanup_pop_restore_np(int " execute ");"

.SH ""

꡼󥢥åץϥɥϡ
.BR "pthread_exit" (3)
ƤӽФ줿ꡢä줿ꤷ
åɤλȤ˸ƤӽФؿǤ롣
꡼󥢥åץϥɥ
åε§ˤʤäϿӺ롣

꡼󥢥åץϥɥŪϡ
åɤλȤݻƤ뤫⤷ʤ񸻤
뤳ȤǤ롣
ˡåɤå mutex ݻޤ
λä줿ꤹȡ
 mutex ϱʵפ˥å줿ޤޤǡ
ۤΥåɤ˼¹ԤǤʤʤäƤޤ
ΤȤɤǤ褤ˡϡ
mutex åľˡ
mutex Υå뤿
꡼󥢥åץϥɥϿ뤳ȤǤ롣
Ʊ褦ˡ꡼󥢥åץϥɥ
åɤνλ
.BR "malloc" (3)
dzݤ줿֥å
եǥץ򥯥ꤹΤ˻ѤǤ롣

.B "pthread_cleanup_push"
ϴؿ
.I "routine"

.I "arg"
ȤȤ˥꡼󥢥åץϥɥȤϿ롣
λ
б
.B "pthread_cleanup_pop"
ޤǤδ֡
Υåɤ
.BR "pthread_exit" (3)
ޤϼäˤäƽλˡ
ؿ
.I "routine"

.I "arg"
ȤʤäƸƤӽФ褦ˤʤ롣
λʣΥ꡼󥢥åץϥɥ餬ͭˤʤäƤϡ
꡼󥢥åץϥɥ LIFO ˸ƤӽФ:
ʤǸϿ줿ϥɥ餬ǽ˸ƤӽФ롣

.B "pthread_cleanup_pop"
ϡǸϿ줿꡼󥢥åץϥɥ롣

.I "execute"
 0 Ǥʤ硢
.B "pthread_cleanup_pop"
ϥϥɥ¹Ԥ롣
ʤ
ؿ
.I "routine"

.I "arg"
ȤʤäƸƤӽФ

.I "execute"
 0 ξϡϥɥ餬ǡ¹Ԥ뤳ȤϤʤ

б
.B "pthread_cleanup_push"

.B "pthread_cleanup_pop"
ФϡƱؿΡ
Ʊ֥åؤˤʤФʤʤ
ºݡ
.B "pthread_cleanup_push"

.B "pthread_cleanup_pop"
ϥޥǤꡢ
.B "pthread_cleanup_push"
ΥޥŸˤ

.B "{"
ޤޤƤơб
Ĥ
.B "}"
ϡб
.B "pthread_cleanup_pop"
ΥޥŸ˴ޤޤƤ롣

.B "pthread_cleanup_push_defer_np"
ϡ
.B "pthread_cleanup_push"

.BR "pthread_setcanceltype" (3)
Ȥ߹碌ݡ֥ǤʤĥǤ롣
.B "pthread_cleanup_push"
ȤޤäƱ褦˥꡼󥢥åץϥɥϿ뤬
Ʊˤλμä¸
äٱ (deferred) ѹ롣
ˤäơ
åɤμäƱ (asynchronous) ǤäƤ
꡼󥢥å׵ͭˤʤ뤳Ȥݾڤ롣

.B "pthread_cleanup_pop_restore_np"

.B "pthread_cleanup_push_defer_np"
ˤäϿ줿ϥ꡼󥢥åץϥɥ
ä
.B "pthread_cleanup_push_defer_np"
ƤӽФ줿᤹ͤ

.B "pthread_cleanup_push_defer_np"

.B "pthread_cleanup_pop_restore_np"
ФˤʤäƤʤФʤ餺
ȤƱ֥åؤˤʤФʤʤ


.RS
.ft 3
.nf
.sp
pthread_cleanup_push_defer_np(routine, arg);
...
pthread_cleanup_pop_defer_np(execute);
.ft
.LP
.RE
.fi

Τ褦ήϵǽŪ˼ΤΤƱ (ꥳѥȤǤΨŪ) Ǥ롣

.RS
.ft 3
.nf
.sp
{ int oldtype;
  pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, &oldtype);
  pthread_cleanup_push(routine, arg);
  ...
  pthread_cleanup_pop(execute);
  pthread_setcanceltype(oldtype, NULL);
}
.ft
.LP
.RE
.fi

.SH "֤"

ʤ

.SH "顼"

ʤ

.SH ""
Xavier Leroy <Xavier.Leroy@inria.fr>

.SH "Ϣ"
.BR "pthread_exit" (3),
.BR "pthread_cancel" (3),
.BR "pthread_setcanceltype" (3).

.SH ""

ϡ mutex
.I "mut"
å˥åɤä줿
å褦ˡ
mutex
.I "mut"
åˡǤ: 

.RS
.ft 3
.nf
.sp
pthread_cleanup_push(pthread_mutex_unlock, (void *) &mut);
pthread_mutex_lock(&mut);
/* 򤹤 */
pthread_mutex_unlock(&mut);
pthread_cleanup_pop(0);
.ft
.LP
.RE
.fi

Ǹ 2 ԤϼΤΤƱǡ֤ǽǤ: 

.RS
.ft 3
.nf
.sp
pthread_cleanup_pop(1);
.ft
.LP
.RE
.fi

Υɤϼäٱ (deferred) Ǥ˸¤ä
Ǥ뤳Ȥդ뤳 (
.BR "pthread_setcanceltype" (3)
򻲾 ) 
äƱ (asynchronous) ξˤϡ
åɤμä
.B "pthread_cleanup_push"

.B "pthread_mutex_lock"
δ֤䡢
.B "pthread_mutex_unlock"

.B "pthread_cleanup_pop"
δ֤ǵǽꡢ
ɤξˤ⥹åɤϥȥåɤ
åƤʤ mutex å褦ȤƤޤ
ΤȤƱäȤˤȤμͳǤ롣

ΥɤƱäǤưʤФʤʤ硢
mutex ΥåӥåΤˡ
äٱ (deferred) ѹʤФʤʤ:

.RS
.ft 3
.nf
.sp
pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, &oldtype);
pthread_cleanup_push(pthread_mutex_unlock, (void *) &mut);
pthread_mutex_lock(&mut);
/* do some work */
pthread_cleanup_pop(1);
pthread_setcanceltype(oldtype, NULL);
.ft
.LP
.RE
.fi

Υɤϡݡ֥Ǥʤؿ
.B "pthread_cleanup_push_defer_np"

.B "pthread_cleanup_pop_restore_np"
ȤȤǡꥳѥȤǤΨŪˡ˽ľȤǤ:

.RS
.ft 3
.nf
.sp
pthread_cleanup_push_restore_np(pthread_mutex_unlock, (void *) &mut);
pthread_mutex_lock(&mut);
/* do some work */
pthread_cleanup_pop_restore_np(1);
.ft
.LP
.RE
.fi