시프 레폿

/*
 CriticalSectionSync.cpp
 프로그램 설명: 생성 가능한 쓰레드의 개수 측정.
*/
#include <stdio.h>
#include <windows.h>
#include <process.h>
#include <tchar.h>

#define NUM_OF_GATE  6

LONG gTotalCount = 0;

CRITICAL_SECTION   hCriticalSection;

void IncreaseCount()
{
 EnterCriticalSection (&hCriticalSection);
 gTotalCount++;
 LeaveCriticalSection (&hCriticalSection);
}

unsigned int WINAPI ThreadProc( LPVOID lpParam )
{
 for(DWORD i=0; i<1000; i++)
 {
  IncreaseCount();
 }

 return 0;
}

int _tmain(int argc, TCHAR* argv[])
{
    DWORD dwThreadId[NUM_OF_GATE];
    HANDLE hThread[NUM_OF_GATE];
 
 InitializeCriticalSection(&hCriticalSection);

 for(DWORD i=0; i<NUM_OF_GATE; i++)
 {
        hThread[i] = (HANDLE)
      _beginthreadex (
       NULL,
       0,           
       ThreadProc,     
       NULL,                   
       CREATE_SUSPENDED,    
       (unsigned *)&dwThreadId[i]  
         );

     if(hThread[i] == NULL)
     {
         _tprintf(_T("Thread creation fault! \n"));
         return -1;
     }
 }

 for(DWORD y=0; y<NUM_OF_GATE; y++)
 {
  ResumeThread(hThread[y]);
 }

 WaitForMultipleObjects(NUM_OF_GATE, hThread, TRUE, INFINITE);

 _tprintf(_T("total count: %d \n"), gTotalCount);

 for(DWORD j=0; j<NUM_OF_GATE; j++)
 {
  CloseHandle(hThread[j]);
 }
 
 DeleteCriticalSection(&hCriticalSection);

 return 0;
}