83 lines
2.5 KiB
C
83 lines
2.5 KiB
C
/* Copyright (C) 2002 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Jakub Jelinek <jakub@redhat.com>, 2002.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <errno.h>
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#include <rpc/rpc.h>
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#include "pthread.h"
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#include "internals.h"
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#include "spinlock.h"
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#include "restart.h"
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#include <bits/libc-lock.h>
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#if !defined NOT_IN_libc
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# ifndef SHARED
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weak_extern (__pthread_do_exit)
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weak_extern (__pthread_thread_self)
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# endif
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int __libc_multiple_threads attribute_hidden;
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# ifndef FLOATING_STACKS
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# undef THREAD_GETMEM
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# undef THREAD_SETMEM
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# define THREAD_GETMEM(descr, member) descr->member
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# define THREAD_SETMEM(descr, member, value) descr->member = (value)
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# endif
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/* The next two functions are similar to pthread_setcanceltype() but
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more specialized for the use in the cancelable functions like write().
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They do not need to check parameters etc. */
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int
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attribute_hidden
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__libc_enable_asynccancel (void)
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{
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#ifdef FLOATING_STACKS
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pthread_descr self = thread_self();
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#else
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pthread_descr self = __libc_maybe_call2 (pthread_thread_self, (), NULL);
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if (self == NULL)
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return PTHREAD_CANCEL_DEFERRED;
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#endif
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int oldtype = THREAD_GETMEM(self, p_canceltype);
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THREAD_SETMEM(self, p_canceltype, PTHREAD_CANCEL_ASYNCHRONOUS);
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if (__builtin_expect (THREAD_GETMEM(self, p_canceled), 0) &&
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THREAD_GETMEM(self, p_cancelstate) == PTHREAD_CANCEL_ENABLE)
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__libc_maybe_call2 (pthread_do_exit,
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(PTHREAD_CANCELED, CURRENT_STACK_FRAME), 0);
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return oldtype;
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}
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void
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internal_function attribute_hidden
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__libc_disable_asynccancel (int oldtype)
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{
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#ifdef FLOATING_STACKS
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pthread_descr self = thread_self();
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#else
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pthread_descr self = __libc_maybe_call2 (pthread_thread_self, (), NULL);
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if (self != NULL)
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#endif
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THREAD_SETMEM(self, p_canceltype, oldtype);
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}
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#endif
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