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https://github.com/debauchee/barrier.git
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1ccb92b888
poll() but there was a race condition where the thread trying to unblock poll() could send the signal before the polling thread had entered poll(). Now using a pipe and polling on that and the client's sockets, and just writing a byte into the pipe to unblock poll. This persists until the next call to poll() so we might force poll() to return once unnecessarily but that's not a problem. This change makes the BSD code similar to the winsock code, which uses a winsock event instead of a pipe.
114 lines
3.1 KiB
C++
114 lines
3.1 KiB
C++
/*
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* synergy -- mouse and keyboard sharing utility
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* Copyright (C) 2002 Chris Schoeneman
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*
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* This package is free software you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* found in the file COPYING that should have accompanied this file.
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*
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* This package is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef CARCHMULTITHREADPOSIX_H
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#define CARCHMULTITHREADPOSIX_H
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#include "IArchMultithread.h"
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#include "stdlist.h"
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#include <pthread.h>
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#define ARCH_MULTITHREAD CArchMultithreadPosix
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class CArchCondImpl {
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public:
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pthread_cond_t m_cond;
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};
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class CArchMutexImpl {
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public:
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pthread_mutex_t m_mutex;
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};
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//! Posix implementation of IArchMultithread
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class CArchMultithreadPosix : public IArchMultithread {
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public:
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CArchMultithreadPosix();
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virtual ~CArchMultithreadPosix();
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//! @name manipulators
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//@{
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void setNetworkDataForCurrentThread(void*);
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//@}
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//! @name accessors
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//@{
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void* getNetworkDataForThread(CArchThread);
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static CArchMultithreadPosix* getInstance();
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//@}
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// IArchMultithread overrides
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virtual CArchCond newCondVar();
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virtual void closeCondVar(CArchCond);
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virtual void signalCondVar(CArchCond);
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virtual void broadcastCondVar(CArchCond);
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virtual bool waitCondVar(CArchCond, CArchMutex, double timeout);
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virtual CArchMutex newMutex();
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virtual void closeMutex(CArchMutex);
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virtual void lockMutex(CArchMutex);
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virtual void unlockMutex(CArchMutex);
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virtual CArchThread newThread(ThreadFunc, void*);
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virtual CArchThread newCurrentThread();
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virtual CArchThread copyThread(CArchThread);
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virtual void closeThread(CArchThread);
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virtual void cancelThread(CArchThread);
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virtual void setPriorityOfThread(CArchThread, int n);
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virtual void testCancelThread();
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virtual bool wait(CArchThread, double timeout);
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virtual bool isSameThread(CArchThread, CArchThread);
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virtual bool isExitedThread(CArchThread);
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virtual void* getResultOfThread(CArchThread);
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virtual ThreadID getIDOfThread(CArchThread);
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virtual void setSignalHandler(ESignal, SignalFunc, void*);
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virtual void raiseSignal(ESignal);
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private:
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void startSignalHandler();
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CArchThreadImpl* find(pthread_t thread);
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CArchThreadImpl* findNoRef(pthread_t thread);
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void insert(CArchThreadImpl* thread);
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void erase(CArchThreadImpl* thread);
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void refThread(CArchThreadImpl* rep);
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void testCancelThreadImpl(CArchThreadImpl* rep);
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void doThreadFunc(CArchThread thread);
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static void* threadFunc(void* vrep);
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static void threadCancel(int);
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static void* threadSignalHandler(void* vrep);
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private:
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typedef std::list<CArchThread> CThreadList;
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static CArchMultithreadPosix* s_instance;
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bool m_newThreadCalled;
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CArchMutex m_threadMutex;
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CArchThread m_mainThread;
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CThreadList m_threadList;
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ThreadID m_nextID;
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pthread_t m_signalThread;
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SignalFunc m_signalFunc[kNUM_SIGNALS];
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void* m_signalUserData[kNUM_SIGNALS];
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};
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#endif
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