1 /* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
24 __pthread_cleanup_push_defer (
25 struct _pthread_cleanup_buffer
*buffer
,
26 void (*routine
) (void *),
29 struct pthread
*self
= THREAD_SELF
;
31 buffer
->__routine
= routine
;
33 buffer
->__prev
= THREAD_GETMEM (self
, cleanup
);
35 int cancelhandling
= THREAD_GETMEM (self
, cancelhandling
);
37 /* Disable asynchronous cancellation for now. */
38 if (__builtin_expect (cancelhandling
& CANCELTYPE_BITMASK
, 0))
41 int curval
= THREAD_ATOMIC_CMPXCHG_VAL (self
, cancelhandling
,
43 & ~CANCELTYPE_BITMASK
,
45 if (__builtin_expect (curval
== cancelhandling
, 1))
46 /* Successfully replaced the value. */
49 /* Prepare for the next round. */
50 cancelhandling
= curval
;
53 buffer
->__canceltype
= (cancelhandling
& CANCELTYPE_BITMASK
54 ? PTHREAD_CANCEL_ASYNCHRONOUS
55 : PTHREAD_CANCEL_DEFERRED
);
57 THREAD_SETMEM (self
, cleanup
, buffer
);
59 strong_alias (__pthread_cleanup_push_defer
, _pthread_cleanup_push_defer
)
64 __pthread_cleanup_pop_restore (
65 struct _pthread_cleanup_buffer
*buffer
,
68 struct pthread
*self
= THREAD_SELF
;
70 THREAD_SETMEM (self
, cleanup
, buffer
->__prev
);
73 if (__builtin_expect (buffer
->__canceltype
!= PTHREAD_CANCEL_DEFERRED
, 0)
74 && ((cancelhandling
= THREAD_GETMEM (self
, cancelhandling
))
75 & CANCELTYPE_BITMASK
) == 0)
79 int curval
= THREAD_ATOMIC_CMPXCHG_VAL (self
, cancelhandling
,
83 if (__builtin_expect (curval
== cancelhandling
, 1))
84 /* Successfully replaced the value. */
87 /* Prepare for the next round. */
88 cancelhandling
= curval
;
91 CANCELLATION_P (self
);
94 /* If necessary call the cleanup routine after we removed the
95 current cleanup block from the list. */
97 buffer
->__routine (buffer
->__arg
);
99 strong_alias (__pthread_cleanup_pop_restore
, _pthread_cleanup_pop_restore
)