Win32 Performance Measurement Options
By Matthew Wilson, May 01, 2003
Win32 provides six main timing functions for profiling. We'll analyze them and present six corresponding performance counter classes that wrap these functions. Also included is a template class that manipulates instances of any of the six timing classes in order to provide scoped timing operations.
Listing 6 Extract from winstl_processtimes_counter.h
/* /////////////////////////////////////////////////////////////
* ...
*
* Extract from winstl_processtimes_counter.h
*
* Copyright (C) 2002, Synesis Software Pty Ltd.
* (Licensed under the Synesis Software Standard Source License:
* http://www.synesis.com.au/licenses/ssssl.html)
*
* ...
* ////////////////////////////////////////////////////////// */
inline /* static */ HANDLE processtimes_counter::_get_process_handle()
{
static HANDLE s_hProcess = ::GetCurrentProcess();
return s_hProcess;
}
// Operations
inline void processtimes_counter::start()
{
FILETIME creationTime;
FILETIME exitTime;
::GetProcessTimes( _get_process_handle(),
&creationTime,
&exitTime,
reinterpret_cast<LPFILETIME>(&m_kernelStart),
reinterpret_cast<LPFILETIME>(&m_userStart));
}
inline void processtimes_counter::stop()
{
FILETIME creationTime;
FILETIME exitTime;
::GetProcessTimes( _get_process_handle(),
&creationTime,
&exitTime,
reinterpret_cast<LPFILETIME>(&m_kernelEnd),
reinterpret_cast<LPFILETIME>(&m_userEnd));
}
