unit1.cpp

《bcb深度历险》 电子书

//---------------------------------------------------------------------------

#include <vcl.h>
#pragma hdrstop

#include "Unit1.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
#pragma resource "*.dfm"
TForm1 *Form1;
TLargeInteger PerformanceCounterOverhead;


//---------------------------------------------------------------------------
__fastcall TForm1::TForm1(TComponent* Owner)
        : TForm(Owner)
{
}
//---------------------------------------------------------------------------

// MyDelay1 - use GetTickCount
void _stdcall MyDelay1(DWORD MSecs)
{
  DWORD BeginTime;

  BeginTime = GetTickCount();
  do {
  } while (GetTickCount() - BeginTime <= MSecs);
}

// MyDelay2 - use QueryPerformanceCounter
void _stdcall MyDelay2(DWORD MSecs)
{
  TLargeInteger rStart, rEnd, rFreq;

  //