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 7 Extract from winstl_performance_counter_scope.h
/* /////////////////////////////////////////////////////////////
* ...
*
* Extract from winstl_performance_counter_scope.h
*
* Copyright (C) 2002, Synesis Software Pty Ltd.
* (Licensed under the Synesis Software Standard Source License:
* http://www.synesis.com.au/licenses/ssssl.html)
*
* ...
* ////////////////////////////////////////////////////////// */
// class performance_counter_scope
template <ws_typename_param_k T>
class performance_counter_scope
{
public:
typedef T counter_type;
typedef performance_counter_scope<T> class_type;
public:
ws_explicit_k performance_counter_scope(counter_type &counter)
: m_counter(counter)
{
m_counter.start();
}
~performance_counter_scope()
{
m_counter.stop();
}
void stop()
{
m_counter.stop();
}
// This method is const, to ensure that only the stop operation
// (via performance_counter_scope::stop()) is accessible
// on the managed counter.
const counter_type &get_counter() const
{
return m_counter;
}
// Members
protected:
T &m_counter;
// Not to be implemented
private:
performance_counter_scope(class_type const &rhs);
class_type const &operator =(class_type const &rhs);
};
