1 /* Copyright (C) 2002 Free Software Foundation, Inc.
2    This file is part of the GNU C Library.
3    Contributed by Jakub Jelinek <jakub@redhat.com>, 2002.
4 
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.
9 
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.
14 
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/>.  */
18 
19 #include <errno.h>
20 #include <rpc/rpc.h>
21 #include "pthread.h"
22 #include "internals.h"
23 #include "spinlock.h"
24 #include "restart.h"
25 #include <bits/libc-lock.h>
26 
27 #if !defined NOT_IN_libc
28 
29 # ifndef SHARED
weak_extern(__pthread_do_exit)30 weak_extern (__pthread_do_exit)
31 # endif
32 
33 /* The next two functions are similar to pthread_setcanceltype() but
34    more specialized for the use in the cancelable functions like write().
35    They do not need to check parameters etc.  */
36 int
37 attribute_hidden
38 __libc_enable_asynccancel (void)
39 {
40   pthread_descr self = thread_self();
41   int oldtype = LIBC_THREAD_GETMEM(self, p_canceltype);
42   LIBC_THREAD_SETMEM(self, p_canceltype, PTHREAD_CANCEL_ASYNCHRONOUS);
43   if (__builtin_expect (LIBC_THREAD_GETMEM(self, p_canceled), 0) &&
44       LIBC_THREAD_GETMEM(self, p_cancelstate) == PTHREAD_CANCEL_ENABLE)
45     __libc_maybe_call2 (pthread_do_exit,
46 			(PTHREAD_CANCELED, CURRENT_STACK_FRAME), 0);
47   return oldtype;
48 }
strong_alias(__libc_enable_asynccancel,__librt_enable_asynccancel)49 strong_alias (__libc_enable_asynccancel, __librt_enable_asynccancel)
50 
51 void
52 internal_function attribute_hidden
53 __libc_disable_asynccancel (int oldtype)
54 {
55   pthread_descr self = thread_self();
56   LIBC_THREAD_SETMEM(self, p_canceltype, oldtype);
57 }
58 strong_alias (__libc_disable_asynccancel, __librt_disable_asynccancel)
59 
60 #endif
61