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70ff58ced4
When applications redirect some functions they might get called before libpthread is fully initialized. They may still expected pthread_self and cancellable functions to work, so cope with such calls in that situation.
54 lines
1.6 KiB
C
54 lines
1.6 KiB
C
/* Set the cancel type during blocking calls.
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Copyright (C) 2020-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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 <pthread.h>
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#include <pthreadP.h>
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#include <pt-internal.h>
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int __pthread_enable_asynccancel (void)
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{
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struct __pthread *p = _pthread_self ();
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int oldtype;
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if (___pthread_self == NULL)
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/* We are not initialized yet, we can't be cancelled anyway. */
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return PTHREAD_CANCEL_DEFERRED;
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__pthread_mutex_lock (&p->cancel_lock);
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oldtype = p->cancel_type;
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p->cancel_type = PTHREAD_CANCEL_ASYNCHRONOUS;
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__pthread_mutex_unlock (&p->cancel_lock);
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__pthread_testcancel ();
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return oldtype;
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}
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void __pthread_disable_asynccancel (int oldtype)
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{
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struct __pthread *p = _pthread_self ();
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if (___pthread_self == NULL)
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/* We are not initialized yet, we can't be cancelled anyway. */
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return;
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__pthread_mutex_lock (&p->cancel_lock);
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p->cancel_type = oldtype;
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__pthread_mutex_unlock (&p->cancel_lock);
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}
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