260ba0bff1
Mainly focus on files that use BSD 2-Clause license, however the tool I was using mis-identified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
180 lines
4.4 KiB
C
180 lines
4.4 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2005, David Xu <davidxu@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "namespace.h"
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#include <pthread.h>
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#include "un-namespace.h"
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#include "thr_private.h"
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__weak_reference(_pthread_cancel, pthread_cancel);
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__weak_reference(_pthread_setcancelstate, pthread_setcancelstate);
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__weak_reference(_pthread_setcanceltype, pthread_setcanceltype);
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__weak_reference(_pthread_testcancel, pthread_testcancel);
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static inline void
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testcancel(struct pthread *curthread)
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{
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if (__predict_false(SHOULD_CANCEL(curthread) &&
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!THR_IN_CRITICAL(curthread)))
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_pthread_exit(PTHREAD_CANCELED);
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}
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void
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_thr_testcancel(struct pthread *curthread)
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{
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testcancel(curthread);
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}
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int
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_pthread_cancel(pthread_t pthread)
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{
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struct pthread *curthread = _get_curthread();
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int ret;
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/*
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* POSIX says _pthread_cancel should be async cancellation safe.
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* _thr_find_thread and THR_THREAD_UNLOCK will enter and leave critical
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* region automatically.
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*/
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if ((ret = _thr_find_thread(curthread, pthread, 0)) == 0) {
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if (!pthread->cancel_pending) {
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pthread->cancel_pending = 1;
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if (pthread->state != PS_DEAD)
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_thr_send_sig(pthread, SIGCANCEL);
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}
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THR_THREAD_UNLOCK(curthread, pthread);
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}
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return (ret);
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}
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int
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_pthread_setcancelstate(int state, int *oldstate)
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{
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struct pthread *curthread = _get_curthread();
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int oldval;
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oldval = curthread->cancel_enable;
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switch (state) {
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case PTHREAD_CANCEL_DISABLE:
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curthread->cancel_enable = 0;
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break;
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case PTHREAD_CANCEL_ENABLE:
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curthread->cancel_enable = 1;
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if (curthread->cancel_async)
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testcancel(curthread);
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break;
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default:
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return (EINVAL);
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}
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if (oldstate) {
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*oldstate = oldval ? PTHREAD_CANCEL_ENABLE :
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PTHREAD_CANCEL_DISABLE;
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}
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return (0);
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}
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int
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_pthread_setcanceltype(int type, int *oldtype)
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{
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struct pthread *curthread = _get_curthread();
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int oldval;
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oldval = curthread->cancel_async;
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switch (type) {
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case PTHREAD_CANCEL_ASYNCHRONOUS:
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curthread->cancel_async = 1;
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testcancel(curthread);
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break;
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case PTHREAD_CANCEL_DEFERRED:
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curthread->cancel_async = 0;
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break;
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default:
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return (EINVAL);
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}
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if (oldtype) {
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*oldtype = oldval ? PTHREAD_CANCEL_ASYNCHRONOUS :
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PTHREAD_CANCEL_DEFERRED;
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}
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return (0);
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}
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void
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_pthread_testcancel(void)
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{
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struct pthread *curthread = _get_curthread();
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testcancel(curthread);
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}
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void
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_thr_cancel_enter(struct pthread *curthread)
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{
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curthread->cancel_point = 1;
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testcancel(curthread);
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}
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void
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_thr_cancel_enter2(struct pthread *curthread, int maycancel)
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{
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curthread->cancel_point = 1;
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if (__predict_false(SHOULD_CANCEL(curthread) &&
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!THR_IN_CRITICAL(curthread))) {
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if (!maycancel)
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thr_wake(curthread->tid);
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else
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_pthread_exit(PTHREAD_CANCELED);
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}
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}
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void
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_thr_cancel_leave(struct pthread *curthread, int maycancel)
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{
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curthread->cancel_point = 0;
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if (__predict_false(SHOULD_CANCEL(curthread) &&
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!THR_IN_CRITICAL(curthread) && maycancel))
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_pthread_exit(PTHREAD_CANCELED);
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}
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void
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_pthread_cancel_enter(int maycancel)
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{
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_thr_cancel_enter2(_get_curthread(), maycancel);
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}
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void
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_pthread_cancel_leave(int maycancel)
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{
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_thr_cancel_leave(_get_curthread(), maycancel);
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}
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