mirror of
git://sourceware.org/git/glibc.git
synced 2025-01-30 12:31:53 +08:00
b22d701bb7
2003-04-04 Ulrich Drepper <drepper@redhat.com> * sysdeps/pthread/createthread.c (create_thread): Add some more comments explaining when to set multiple_threads and when not. * pthreadP.h: Define THREAD_ATOMIC_CMPXCHG_VAL and THREAD_ATOMIC_BIT_SET if not already defined. * sysdeps/i386/tls.h: Define THREAD_ATOMIC_CMPXCHG_VAL and THREAD_ATOMIC_BIT_SET: * sysdeps/x86_64/tls.h: Likewise. * cleanup_defer.c (_pthread_cleanup_push_defer): Rewrite to use THREAD_ATOMIC_CMPXCHG_VAL. (_pthread_cleanup_pop_restore): Likewise. * cancellation.c (__pthread_enable_asynccancel): Likewise. (__pthread_enable_asynccancel_2): Likewise. (__pthread_disable_asynccancel): Likewise. * libc-cancellation.c (__libc_enable_asynccancel): Likewise. (__libc_disable_asynccancel): Likewise. * init.c (sigcancel_handler): Likewise. * pthread_setcancelstate.c (__pthread_setcancelstate): Likewise. * pthread_setcanceltype.c (__pthread_setcanceltype): Likewise.
99 lines
3.0 KiB
C
99 lines
3.0 KiB
C
/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@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 "pthreadP.h"
|
|
|
|
|
|
void
|
|
_pthread_cleanup_push_defer (buffer, routine, arg)
|
|
struct _pthread_cleanup_buffer *buffer;
|
|
void (*routine) (void *);
|
|
void *arg;
|
|
{
|
|
struct pthread *self = THREAD_SELF;
|
|
|
|
buffer->__routine = routine;
|
|
buffer->__arg = arg;
|
|
buffer->__prev = THREAD_GETMEM (self, cleanup);
|
|
|
|
int cancelhandling = THREAD_GETMEM (self, cancelhandling);
|
|
|
|
/* Disable asynchronous cancellation for now. */
|
|
if (__builtin_expect (cancelhandling & CANCELTYPE_BITMASK, 0))
|
|
while (1)
|
|
{
|
|
int newval = THREAD_ATOMIC_CMPXCHG_VAL (self, cancelhandling,
|
|
cancelhandling
|
|
& ~CANCELTYPE_BITMASK,
|
|
cancelhandling);
|
|
if (__builtin_expect (newval == cancelhandling, 1))
|
|
/* Successfully replaced the value. */
|
|
break;
|
|
|
|
/* Prepare for the next round. */
|
|
cancelhandling = newval;
|
|
}
|
|
|
|
buffer->__canceltype = (cancelhandling & CANCELTYPE_BITMASK
|
|
? PTHREAD_CANCEL_ASYNCHRONOUS
|
|
: PTHREAD_CANCEL_DEFERRED);
|
|
|
|
THREAD_SETMEM (self, cleanup, buffer);
|
|
}
|
|
strong_alias (_pthread_cleanup_push_defer, __pthread_cleanup_push_defer)
|
|
|
|
|
|
void
|
|
_pthread_cleanup_pop_restore (buffer, execute)
|
|
struct _pthread_cleanup_buffer *buffer;
|
|
int execute;
|
|
{
|
|
struct pthread *self = THREAD_SELF;
|
|
|
|
THREAD_SETMEM (self, cleanup, buffer->__prev);
|
|
|
|
int cancelhandling;
|
|
if (__builtin_expect (buffer->__canceltype != PTHREAD_CANCEL_DEFERRED, 0)
|
|
&& ((cancelhandling = THREAD_GETMEM (self, cancelhandling))
|
|
& CANCELTYPE_BITMASK) == 0)
|
|
{
|
|
while (1)
|
|
{
|
|
int newval = THREAD_ATOMIC_CMPXCHG_VAL (self, cancelhandling,
|
|
cancelhandling
|
|
| CANCELTYPE_BITMASK,
|
|
cancelhandling);
|
|
if (__builtin_expect (newval == cancelhandling, 1))
|
|
/* Successfully replaced the value. */
|
|
break;
|
|
|
|
/* Prepare for the next round. */
|
|
cancelhandling = newval;
|
|
}
|
|
|
|
CANCELLATION_P (self);
|
|
}
|
|
|
|
/* If necessary call the cleanup routine after we removed the
|
|
current cleanup block from the list. */
|
|
if (execute)
|
|
buffer->__routine (buffer->__arg);
|
|
}
|
|
strong_alias (_pthread_cleanup_pop_restore, __pthread_cleanup_pop_restore)
|