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//
// RWLockTest.cpp
//
// Created by Setsu on 7/25/2010.
// Copyright 2010 RoundSquare Inc. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
//
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//
//----------------------------------------
// include
//----------------------------------------
#include <Poco/Logger.h>
#include <Poco/PatternFormatter.h>
#include <Poco/FormattingChannel.h>
#include <Poco/ConsoleChannel.h>
#include <Poco/Format.h>
#include <Poco/Runnable.h>
#include <Poco/Thread.h>
#include <Poco/RWLock.h>
#include <Poco/Stopwatch.h>
#include <string>
#include "ScopedLogMessage.h"
//----------------------------------------
// const
//----------------------------------------
const int kNumLoops = 1000;
const int kNumRunnable = 5;
//----------------------------------------
// RWLockRunnable
//----------------------------------------
class RWLockRunnable: public Poco::Runnable
{
public:
RWLockRunnable(Poco::RWLock& lock, volatile int& counter) :
m_Lock(lock)
, m_Counter(counter)
, m_Ok(true)
{
}
void run()
{
int lastCount = 0;
for(int i=0; i<kNumLoops; ++i)
{
{ // scope for read lock
Poco::ScopedReadRWLock lock(m_Lock);
lastCount = m_Counter;
for(int k=0; k<100; ++k)
{
if(m_Counter != lastCount)
{
m_Ok = false;
}
Poco::Thread::yield();
}
}
{ // scope for write lock
Poco::ScopedWriteRWLock lock(m_Lock);
for(int k=0; k<100; ++k)
{
--m_Counter;
Poco::Thread::yield();
}
for(int k=0; k<100; ++k)
{
++m_Counter;
Poco::Thread::yield();
}
++m_Counter;
if(m_Counter <= lastCount)
{
m_Ok = false;
}
}
}
}
bool ok() const
{
return m_Ok;
}
private:
Poco::RWLock& m_Lock;
volatile int& m_Counter;
bool m_Ok;
};
//----------------------------------------
// PrepareConsoleLogger
//----------------------------------------
void PrepareConsoleLogger(const std::string& name, int level=Poco::Message::PRIO_INFORMATION)
{
Poco::FormattingChannel* pFCConsole = new Poco::FormattingChannel(new Poco::PatternFormatter("%t"));
pFCConsole->setChannel(new Poco::ConsoleChannel);
pFCConsole->open();
Poco::Logger::create(name, pFCConsole, level);
}
//----------------------------------------
// main
//----------------------------------------
int main(int /*argc*/, char** /*argv*/)
{
PrepareConsoleLogger(Poco::Logger::ROOT, Poco::Message::PRIO_INFORMATION);
ScopedLogMessage msg("RWLockTest ", "start", "end");
Poco::Stopwatch stopwatch;
stopwatch.start();
Poco::RWLock lock;
int counter = 0;
RWLockRunnable* pRunnable[kNumRunnable];
Poco::Thread thread[kNumRunnable];
for(int i=0; i<kNumRunnable; ++i)
{
pRunnable[i] = new RWLockRunnable(lock, counter);
thread[i].start(*pRunnable[i]);
}
for(int i=0; i<kNumRunnable; ++i)
{
thread[i].join();
if(!pRunnable[i]->ok())
{
msg.Message(Poco::format(" RWLockRunnable[%i] failed!", i));
}
delete pRunnable[i];
}
stopwatch.stop();
msg.Message(Poco::format(" counter = %i (expected: %i)", counter, kNumLoops*kNumRunnable));
msg.Message(Poco::format(" Elapsed time = %.3fmSec", (1000.0 * stopwatch.elapsed()) / stopwatch.resolution()));
return 0;
} |
