mirror of
https://github.com/debauchee/barrier.git
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151 lines
2.7 KiB
C++
151 lines
2.7 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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#include "CMutex.h"
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#include "CLog.h"
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//
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// CMutex
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//
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CMutex::CMutex()
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{
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init();
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}
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CMutex::CMutex(const CMutex&)
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{
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init();
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}
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CMutex::~CMutex()
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{
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fini();
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}
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CMutex&
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CMutex::operator=(const CMutex&)
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{
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return *this;
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}
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#if HAVE_PTHREAD
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#include <pthread.h>
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#include <cerrno>
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void
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CMutex::init()
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{
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pthread_mutex_t* mutex = new pthread_mutex_t;
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int status = pthread_mutex_init(mutex, NULL);
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assert(status == 0);
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// status = pthread_mutexattr_settype(mutex, PTHREAD_MUTEX_RECURSIVE);
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// assert(status == 0);
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m_mutex = reinterpret_cast<void*>(mutex);
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}
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void
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CMutex::fini()
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{
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pthread_mutex_t* mutex = reinterpret_cast<pthread_mutex_t*>(m_mutex);
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int status = pthread_mutex_destroy(mutex);
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LOGC(status != 0, (CLOG_ERR "pthread_mutex_destroy status %d", status));
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assert(status == 0);
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delete mutex;
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}
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void
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CMutex::lock() const
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{
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pthread_mutex_t* mutex = reinterpret_cast<pthread_mutex_t*>(m_mutex);
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int status = pthread_mutex_lock(mutex);
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switch (status) {
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case 0:
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// success
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return;
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case EDEADLK:
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assert(0 && "lock already owned");
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break;
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case EAGAIN:
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assert(0 && "too many recursive locks");
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break;
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default:
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LOG((CLOG_ERR "pthread_mutex_lock status %d", status));
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assert(0 && "unexpected error");
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}
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}
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void
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CMutex::unlock() const
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{
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pthread_mutex_t* mutex = reinterpret_cast<pthread_mutex_t*>(m_mutex);
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int status = pthread_mutex_unlock(mutex);
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switch (status) {
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case 0:
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// success
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return;
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case EPERM:
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assert(0 && "thread doesn't own a lock");
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break;
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default:
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LOG((CLOG_ERR "pthread_mutex_unlock status %d", status));
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assert(0 && "unexpected error");
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}
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}
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#endif // HAVE_PTHREAD
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#if WINDOWS_LIKE
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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void
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CMutex::init()
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{
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CRITICAL_SECTION* mutex = new CRITICAL_SECTION;
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InitializeCriticalSection(mutex);
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m_mutex = reinterpret_cast<void*>(mutex);
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}
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void
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CMutex::fini()
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{
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CRITICAL_SECTION* mutex = reinterpret_cast<CRITICAL_SECTION*>(m_mutex);
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DeleteCriticalSection(mutex);
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delete mutex;
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}
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void
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CMutex::lock() const
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{
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EnterCriticalSection(reinterpret_cast<CRITICAL_SECTION*>(m_mutex));
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}
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void
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CMutex::unlock() const
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{
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LeaveCriticalSection(reinterpret_cast<CRITICAL_SECTION*>(m_mutex));
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}
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#endif // WINDOWS_LIKE
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