platform_bionic/libc/bionic/pthread_accessor.h
Elliott Hughes 1728b23965 Switch to g_ for globals.
That's what the Google style guide recommends, and we're starting
to get a mix.

Change-Id: Ib0c53a890bb5deed5c679e887541a715faea91fc
2014-05-14 10:02:03 -07:00

64 lines
1.6 KiB
C++

/*
* 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 "private/bionic_macros.h"
#include "pthread_internal.h"
class pthread_accessor {
public:
explicit pthread_accessor(pthread_t desired_thread) {
Lock();
for (thread_ = g_thread_list; thread_ != NULL; thread_ = thread_->next) {
if (thread_ == reinterpret_cast<pthread_internal_t*>(desired_thread)) {
break;
}
}
}
~pthread_accessor() {
Unlock();
}
void Unlock() {
if (is_locked_) {
is_locked_ = false;
thread_ = NULL;
pthread_mutex_unlock(&g_thread_list_lock);
}
}
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(&g_thread_list_lock);
is_locked_ = true;
}
DISALLOW_COPY_AND_ASSIGN(pthread_accessor);
};
#endif // PTHREAD_ACCESSOR_H