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