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#pragma once
#include "itextstream.h"
#if defined(_MSC_VER) || defined(_WINDOWS_)
#include <time.h>
#include <windows.h>
#undef min
#undef max
#if !defined(_WINSOCK2API_) && !defined(_WINSOCKAPI_)
struct timeval
{
long tv_sec;
long tv_usec;
};
#endif
#else
#include <sys/time.h>
#endif
#if defined(_MSC_VER) || defined(_WINDOWS_)
inline int gettimeofday(struct timeval* tv, void*)
{
union {
long long ns100;
FILETIME ft;
} now;
GetSystemTimeAsFileTime (&now.ft);
tv->tv_usec = (long) ((now.ns100 / 10LL) % 1000000LL);
tv->tv_sec = (long) ((now.ns100 - 116444736000000000LL) / 10000000LL);
return (0);
}
#endif
#include <string>
namespace {
const double MILLION = 1000000.0;
/**
* Operator- for timeval structures.
*
* @returns
* Double-precision float representing the difference in seconds between
* the two times.
*/
double operator-(const timeval& l, const timeval& r) {
// Convert timevals to double
double dl = (double) l.tv_sec + ((double) l.tv_usec / MILLION);
double dr = (double) r.tv_sec + ((double) r.tv_usec / MILLION);
return dl - dr;
}
}
/**
* Debugging class to time a particular event. The clock is saved during
* construction, and the time difference calculated at destruction.
*/
class ScopedDebugTimer
{
private:
// Start time
timeval _s;
// Name of operation
std::string _op;
// Show FPS?
bool _fps;
public:
/**
* Constructor. Set the name of the operation to be printed out on
* destruction.
*
* @param name
* The name of the operation.
*
* @param showFps
* If true, a nominal FPS value will be calculated for the given operation
* time.
*/
ScopedDebugTimer(const std::string& name, bool showFps = false)
: _op(name), _fps(showFps)
{
// Save start time
gettimeofday(&_s, nullptr);
}
/**
* Destructor. Prints out the time of the operation.
*/
~ScopedDebugTimer()
{
// Get the current time
timeval end;
gettimeofday(&end, nullptr);
// Calculate duration
double duration = end - _s;
auto stream = rMessage();
stream << _op << " in " << duration << " seconds";
if (_fps)
{
stream << " (" << (1.0 / duration) << " FPS)";
}
stream << std::endl;
}
};
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