windows系统调用 semaphore信号量

 #include "iostream"
 #include "windows.h"
 #include "cstring"
 using namespace std;

 HANDLE g_hSemThreads=INVALID_HANDLE_VALUE;

 static DWORD WINAPI ThreadProc(LPVOID lpParam){
     LONG nPauseMs=reinterpret_cast<LONG>(lpParam);
     Sleep(nPauseMs);

     if(g_hSemThreads!=INVALID_HANDLE_VALUE){
         LONG nPrevCt();

         if(ReleaseSemaphore(
             g_hSemThreads,
             ,
             &nPrevCt
             )){
                 printf("%d msec thread ended ,slots left:%d\n",nPauseMs,nPrevCt+);
         }
     }

     return();
 }

 void main(){
     g_hSemThreads=CreateSemaphore(
         NULL,
         ,
         ,
         NULL
         );
     for(int nTotal=;nTotal>;nTotal-=){
         WaitForSingleObject(g_hSemThreads,INFINITE);
         LONG nPauseMs=nTotal*;

         HANDLE hThread=CreateThread(
             NULL,
             ,
             ThreadProc,
             reinterpret_cast<LPVOID>(nPauseMs),
             ,
             NULL
             );

         printf("in the %d msec a thread is creates \n",nPauseMs);
         CloseHandle(hThread);
         hThread=INVALID_HANDLE_VALUE;
     }

     CloseHandle(g_hSemThreads);
     g_hSemThreads=INVALID_HANDLE_VALUE;
     getchar();
 }