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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_SOCKET_CLOSE_MONITOR_H_included
#define ASYNCHRONOUS_SOCKET_CLOSE_MONITOR_H_included
#include "ScopedPthreadMutexLock.h"
#include <pthread.h>
/**
* AsynchronousSocketCloseMonitor helps implement Java's asynchronous Socket.close semantics.
*
* AsynchronousSocketCloseMonitor::init must be called before anything else.
*
* Every blocking network I/O operation must be surrounded by an AsynchronousSocketCloseMonitor
* instance. For example:
*
* {
* AsynchronousSocketCloseMonitor monitor(fd);
* byteCount = ::read(fd, buf, sizeof(buf));
* }
*
* To interrupt all threads currently blocked on file descriptor 'fd', call signalBlockedThreads:
*
* AsynchronousSocketCloseMonitor::signalBlockedThreads(fd);
*/
class AsynchronousSocketCloseMonitor {
public:
AsynchronousSocketCloseMonitor(int fd);
~AsynchronousSocketCloseMonitor();
static void init();
static void signalBlockedThreads(int fd);
private:
AsynchronousSocketCloseMonitor* mPrev;
AsynchronousSocketCloseMonitor* mNext;
pthread_t mThread;
int mFd;
// Disallow copy and assignment.
AsynchronousSocketCloseMonitor(const AsynchronousSocketCloseMonitor&);
void operator=(const AsynchronousSocketCloseMonitor&);
};
#endif // ASYNCHRONOUS_SOCKET_CLOSE_MONITOR_H_included
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