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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Mobility Components.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "performance.h"
/************************** time measurement **************************/
#ifdef Q_OS_WIN32
static double QueryPerformanceFrequency_wrapper()
{
LARGE_INTEGER freq;
Q_ASSERT(QueryPerformanceFrequency(&freq));
return static_cast<double>(freq.QuadPart);
}
double ticksPerSecond = QueryPerformanceFrequency_wrapper();
perf_t perf_currentTime()
{
LARGE_INTEGER ret;
Q_ASSERT(QueryPerformanceCounter(&ret));
return ret;
}
double perf_diffTime(perf_t start, perf_t end)
{
return (end.QuadPart - start.QuadPart) / ticksPerSecond;
}
quint64 perf_diffTimeNative(perf_t start, perf_t end)
{
return end.QuadPart - start.QuadPart;
}
#else
perf_t perf_currentTime()
{
return QTime::currentTime();
}
double perf_diffTime(perf_t start, perf_t end)
{
return start.msecsTo(end) / 1000.0;
}
quint64 perf_diffTimeNative(perf_t start, perf_t end)
{
return start.msecsTo(end);
}
#endif
/************************** memory consumption **************************/
#ifdef Q_OS_WIN32
#include <psapi.h>
quint64 perf_currentMemUsage()
{
PROCESS_MEMORY_COUNTERS pmc;
BOOL success = GetProcessMemoryInfo(GetCurrentProcess(), &pmc, sizeof(pmc));
if (!success)
return -1;
return pmc.WorkingSetSize;
}
#else
#ifdef Q_OS_LINUX
#include <cstdio>
quint64 perf_currentMemUsage()
{
FILE * statm = std::fopen("/proc/self/statm", "r");
long long ret = -1;
std::fscanf(statm, "%Lu", &ret);
std::fclose(statm);
return ret*1024;
}
#else
#ifdef Q_OS_MAC
#include <malloc/malloc.h>
quint64 perf_currentMemUsage()
{
malloc_statistics_t stats;
malloc_zone_statistics(NULL, &stats);
return stats.size_allocated; // maybe t.size_in_use?
}
#else
#if _BSD_SOURCE || _SVID_SOURCE || (_XOPEN_SOURCE >= 500 || _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED) && !(_POSIX_C_SOURCE >= 200112L || _XOPEN_SOURCE >= 600)
#include <unistd.h>
static char * sbrk_0_initial = (char*)sbrk(0);
quint64 perf_currentMemUsage()
{
return (char*)sbrk(0)-sbrk_0_initial;
}
#else
quint64 perf_currentMemUsage()
{
return 0;
}
#endif
#endif
#endif
#endif
/* TODO:
mem
- more platforms!
- mac: malloc_zone_statistics
-
leaks?
- boehm gc
*/
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