/usr/include/android/nativehelper/AsynchronousCloseMonitor.h is in android-libnativehelper-dev 7.0.0+r33-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (C) 2010 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 ASYNCHRONOUS_CLOSE_MONITOR_H_included
#define ASYNCHRONOUS_CLOSE_MONITOR_H_included
#include "ScopedPthreadMutexLock.h"
#include <pthread.h>
/**
* AsynchronousCloseMonitor helps implement Java's asynchronous close semantics.
*
* AsynchronousCloseMonitor::init must be called before anything else.
*
* Every blocking I/O operation must be surrounded by an AsynchronousCloseMonitor
* instance. For example:
*
* {
* AsynchronousCloseMonitor monitor(fd);
* byteCount = ::read(fd, buf, sizeof(buf));
* }
*
* To interrupt all threads currently blocked on file descriptor 'fd', call signalBlockedThreads:
*
* AsynchronousCloseMonitor::signalBlockedThreads(fd);
*
* To test to see if the interruption was due to the signalBlockedThreads call:
*
* monitor.wasSignaled();
*/
class AsynchronousCloseMonitor {
public:
AsynchronousCloseMonitor(int fd);
~AsynchronousCloseMonitor();
bool wasSignaled() const;
static void init();
static void signalBlockedThreads(int fd);
private:
AsynchronousCloseMonitor* mPrev;
AsynchronousCloseMonitor* mNext;
pthread_t mThread;
int mFd;
bool mSignaled;
// Disallow copy and assignment.
AsynchronousCloseMonitor(const AsynchronousCloseMonitor&);
void operator=(const AsynchronousCloseMonitor&);
};
#endif // ASYNCHRONOUS_CLOSE_MONITOR_H_included
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