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8c1c0aae20
Now that the thread cancellation type is not accessed concurrently anymore, it is possible to move it out the cancelhandling. By removing the cancel state out of the internal thread cancel handling state there is no need to check if cancelled bit was set in CAS operation. It allows simplifing the cancellation wrappers and the CANCEL_CANCELED_AND_ASYNCHRONOUS is removed. Checked on x86_64-linux-gnu and aarch64-linux-gnu.
50 lines
1.7 KiB
C
50 lines
1.7 KiB
C
/* Copyright (C) 2002-2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@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, see
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<https://www.gnu.org/licenses/>. */
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#include "pthreadP.h"
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#include <tls.h>
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#include <libc-lock.h>
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void
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__libc_cleanup_push_defer (struct _pthread_cleanup_buffer *buffer)
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{
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struct pthread *self = THREAD_SELF;
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buffer->__prev = THREAD_GETMEM (self, cleanup);
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/* Disable asynchronous cancellation for now. */
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buffer->__canceltype = THREAD_GETMEM (self, canceltype);
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THREAD_SETMEM (self, canceltype, PTHREAD_CANCEL_DEFERRED);
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THREAD_SETMEM (self, cleanup, buffer);
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}
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libc_hidden_def (__libc_cleanup_push_defer)
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void
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__libc_cleanup_pop_restore (struct _pthread_cleanup_buffer *buffer)
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{
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struct pthread *self = THREAD_SELF;
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THREAD_SETMEM (self, cleanup, buffer->__prev);
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THREAD_SETMEM (self, canceltype, buffer->__canceltype);
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if (buffer->__canceltype == PTHREAD_CANCEL_ASYNCHRONOUS)
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__pthread_testcancel ();
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}
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libc_hidden_def (__libc_cleanup_pop_restore)
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