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//
// ChecksumTest.cpp
//
// Created by Setsu on 7/11/2010.
// 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/Buffer.h>
#include <Poco/Random.h>
#include <Poco/Stopwatch.h>
#include <Poco/Format.h>
#include <Poco/Checksum.h>
#include <string>
#include "ScopedLogMessage.h"
//----------------------------------------
// const
//----------------------------------------
const std::size_t kBufferSize = 64*1024*1024;
const int kNumTrial = 4;
//----------------------------------------
// AdjustAllocationBytes
// adjust number of allocation bytes for low memory machine
//----------------------------------------
#if defined(POCO_OS_FAMILY_WINDOWS)
#include <new.h>
int ThrowBadAlloc(std::size_t)
{
throw std::bad_alloc();
return 0;
}
#endif
std::size_t AdjustAllocationBytes(ScopedLogMessage& msg, std::size_t bytesWanted)
{
std::size_t bufferSize = bytesWanted;
bool memoryAvailable = false;
char* tempPtr = NULL;
#if defined(POCO_OS_FAMILY_WINDOWS)
_set_new_handler(ThrowBadAlloc);
#endif
while(!memoryAvailable)
{
try
{
tempPtr = new char [bufferSize];
memoryAvailable = true;
}
catch(...)
{
bufferSize /= 2;
}
delete [] tempPtr;
tempPtr = NULL;
}
msg.Message(Poco::format(" Number of buffer allocation bytes: %z", bufferSize));
return bufferSize;
}
//----------------------------------------
// 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("ChecksumTest ", "start", "end");
Poco::Checksum checksum[] = { Poco::Checksum(Poco::Checksum::TYPE_ADLER32)
, Poco::Checksum(Poco::Checksum::TYPE_CRC32) };
const int kNumChecksumTypes = sizeof(checksum)/sizeof(checksum[0]);
double time[kNumChecksumTypes][kNumTrial];
Poco::UInt32 sum[kNumChecksumTypes][kNumTrial];
Poco::Stopwatch stopwatch;
Poco::Random random;
Poco::Buffer<char> buffer(AdjustAllocationBytes(msg, kBufferSize));
for(int trial=0; trial<kNumTrial; ++trial)
{
std::fill(buffer.begin(), buffer.end(), random.nextChar());
for(int type=0; type<kNumChecksumTypes; ++type)
{
stopwatch.restart();
checksum[type].update(buffer.begin(), static_cast<unsigned>(buffer.size()));
stopwatch.stop();
time[type][trial] = (1000.0 * stopwatch.elapsed()) / stopwatch.resolution();
sum[type][trial] = checksum[type].checksum();
}
}
msg.Message(" TYPE_ADLER32 TYPE_CRC32");
msg.Message(" checksum time checksum time");
msg.Message(" =============================+=======================");
for(int trial=0; trial<kNumTrial; ++trial)
{
msg.Message(Poco::format(" #%d: 0x%08X %7.3fmSec 0x%08X %7.3fmSec"
, trial+1
, sum[Poco::Checksum::TYPE_ADLER32][trial]
, time[Poco::Checksum::TYPE_ADLER32][trial]
, sum[Poco::Checksum::TYPE_CRC32][trial]
, time[Poco::Checksum::TYPE_CRC32][trial]));
}
return 0;
} |
