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/* Copyright (C) 2002-2003 RealVNC Ltd. All Rights Reserved.
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
* USA.
*/
//
// util_win32.h - miscellaneous useful bits for Win32 only
//
#ifndef __RFB_UTIL_WIN32_H__
#define __RFB_UTIL_WIN32_H__
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
// *** #include <iostream.h>
#include <rfb/LogWriter.h>
#include <rfb/Exception.h>
namespace rfb {
// WIN32-ONLY PROFILING CODE
//
// CpuTime and CpuTimer provide a simple way to profile particular
// sections of code
//
// Use one CpuTime object per task to be profiled. CpuTime instances
// maintain a cumulative total of time spent in user and kernel space
// by threads.
// When a CpuTime object is created, a label must be specified to
// identify the task being profiled.
// When the object is destroyed, it will print debugging information
// containing the user and kernel times accumulated.
//
// Place a CpuTimer object in each section of code which is to be
// profiled. When the object is created, it snapshots the current
// kernel and user times and stores them. These are used when the
// object is destroyed to establish how much time has elapsed in the
// intervening period. The accumulated time is then added to the
// associated CpuTime object.
//
// This code works only on platforms providing __int64
class CpuTime {
public:
CpuTime(const char *name)
: timer_name(strDup(name)),
kernel_time(0), user_time(0), max_user_time(0), iterations(0) {}
~CpuTime() {
g_log_writer.info("timer %s : %I64ums (krnl), %I64ums (user), %I64uus (user-max) (%I64u its)\n",
timer_name, kernel_time/10000, user_time/10000, max_user_time/10,
iterations);
delete [] timer_name;
}
static LogWriter g_log_writer;
char* timer_name;
__int64 kernel_time;
__int64 user_time;
__int64 iterations;
__int64 max_user_time;
};
class CpuTimer {
public:
inline CpuTimer(CpuTime &ct) : cputime(ct) {
FILETIME create_time, end_time;
if (!GetThreadTimes(GetCurrentThread(),
&create_time, &end_time,
(LPFILETIME)&start_kernel_time,
(LPFILETIME)&start_user_time)) {
throw rdr::SystemException("rfb::CpuTimer failed to initialise", GetLastError());
}
}
inline ~CpuTimer() {
FILETIME create_time, end_time;
__int64 end_kernel_time, end_user_time;
if (!GetThreadTimes(GetCurrentThread(),
&create_time, &end_time,
(LPFILETIME)&end_kernel_time,
(LPFILETIME)&end_user_time)) {
throw rdr::SystemException("rfb::CpuTimer destructor failed", GetLastError());
}
cputime.kernel_time += end_kernel_time - start_kernel_time;
cputime.user_time += end_user_time - start_user_time;
if (end_user_time - start_user_time > cputime.max_user_time) {
cputime.max_user_time = end_user_time - start_user_time;
}
cputime.iterations++;
}
private:
CpuTime& cputime;
__int64 start_kernel_time;
__int64 start_user_time;
};
};
#endif // __RFB_UTIL_WIN32_H__
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