fae89fc404
We could special-case raise(3) in non-threaded programs, but the more conservative course is to make pthread_kill(3) work in signal handlers at the cost of a race shared by other C libraries. Change-Id: I59fb23d03bdabf403435e731704b33acdf3e0234
65 lines
1.6 KiB
C++
65 lines
1.6 KiB
C++
/*
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* Copyright (C) 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef PTHREAD_ACCESSOR_H
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#define PTHREAD_ACCESSOR_H
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#include <pthread.h>
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#include "pthread_internal.h"
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class pthread_accessor {
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public:
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explicit pthread_accessor(pthread_t desired_thread) {
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Lock();
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for (thread_ = gThreadList; thread_ != NULL; thread_ = thread_->next) {
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if (thread_ == reinterpret_cast<pthread_internal_t*>(desired_thread)) {
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break;
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}
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}
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}
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~pthread_accessor() {
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Unlock();
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}
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void Unlock() {
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if (is_locked_) {
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is_locked_ = false;
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thread_ = NULL;
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pthread_mutex_unlock(&gThreadListLock);
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}
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}
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pthread_internal_t& operator*() const { return *thread_; }
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pthread_internal_t* operator->() const { return thread_; }
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pthread_internal_t* get() const { return thread_; }
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private:
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pthread_internal_t* thread_;
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bool is_locked_;
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void Lock() {
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pthread_mutex_lock(&gThreadListLock);
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is_locked_ = true;
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}
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// Disallow copy and assignment.
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pthread_accessor(const pthread_accessor&);
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void operator=(const pthread_accessor&);
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};
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#endif // PTHREAD_ACCESSOR_H
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