mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-15 01:21:06 +00:00
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 curval = THREAD_ATOMIC_CMPXCHG_VAL (self, cancelhandling,
|
||
|
|
cancelhandling
|
||
|
|
& ~CANCELTYPE_BITMASK,
|
||
|
|
cancelhandling);
|
||
|
|
if (__builtin_expect (curval == cancelhandling, 1))
|
||
|
|
/* Successfully replaced the value. */
|
||
|
|
break;
|
||
|
|
|
||
|
|
/* Prepare for the next round. */
|
||
|
|
cancelhandling = curval;
|
||
|
|
}
|
||
|
|
|
||
|
|
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 curval = THREAD_ATOMIC_CMPXCHG_VAL (self, cancelhandling,
|
||
|
|
cancelhandling
|
||
|
|
| CANCELTYPE_BITMASK,
|
||
|
|
cancelhandling);
|
||
|
|
if (__builtin_expect (curval == cancelhandling, 1))
|
||
|
|
/* Successfully replaced the value. */
|
||
|
|
break;
|
||
|
|
|
||
|
|
/* Prepare for the next round. */
|
||
|
|
cancelhandling = curval;
|
||
|
|
}
|
||
|
|
|
||
|
|
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)
|