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