我头疼啊。。。为什么不能够实现互斥。。。。菜菜求大神指点

#include <windows.h>
#include <stdio.h>
#include <iostream>
using namespace std;
bool g_continue=true;
int n,m,t=0;
int k=1;
int a[10];
int b[10];
DWORD  WINAPI Thread1(LPVOID lpPara); //线程1
DWORD  WINAPI Thread2(LPVOID lpPara); //线程1
HANDLE huchi;
int main(){

    HANDLE hThread1, hThread2;//两个线程的handle
    DWORD ThreadId1, ThreadId2; //两个线程的线程ID
    huchi=CreateMutex(NULL,FALSE,NULL);
    hThread1 = CreateThread(NULL,0,Thread1,NULL,0,&ThreadId1);  //创建线程1
    if(hThread1 == NULL)
        return -1;

    hThread2 = CreateThread(NULL,0,Thread2,NULL,0,&ThreadId2); //创建线程2
    if(hThread2 == NULL)
        return -1;

    if(getchar()){ //按回车后终止程序运行
        g_continue = false;
    }

    //等待子进程结束
    WaitForSingleObject(hThread1,INFINITE);
    WaitForSingleObject(hThread2,INFINITE);

    //释放子进程资源
    CloseHandle(hThread1);
    CloseHandle(hThread2);
    system("pause");
}

//线程1执行的代码
DWORD  WINAPI Thread1(LPVOID lpPara)
{  
    WaitForSingleObject(huchi,INFINITE);
    while(g_continue)
 {
  for(n=0;n<10;n++)
    {if (a[n]==0)
     {a[n]=1;
      b[n]=k;
      k=k+1;
      break;}}
  cout<<"生产者将生产编号"<<k-1<<"放入缓冲单元"<<n<<endl;
  cout<<"缓冲单元编号"<<"       产品编号        "<<"缓冲单元状态"<<endl;
  for(n=0;n<10;n++)
  {cout<<"    "<<n<<"                    "<<b[n]<<"               "<<a[n]<<endl;}

  ReleaseMutex (huchi);
 }
     return 0;
}


//线程2执行的代码
DWORD  WINAPI Thread2(LPVOID lpPara)
{      
    WaitForSingleObject(huchi,INFINITE);
 while(g_continue)
 {
  for(n=0;n<10;n++)
    {if (a[m]==1)
     {a[m]=0;
      t=b[m];
      b[m]=0;
      break;}}
  cout<<"消费者从缓冲单元"<<m<<"将产品"<<t<<"取出"<<endl;
  cout<<"缓冲单元编号"<<"       产品编号        "<<"缓冲单元状态"<<endl;
  for(m=0;m<10;m++)
   {cout<<"   "<<m<<"                     "<<b[m]<<"               "<<a[m]<<endl;}

  ReleaseMutex (huchi);
 }
     return 0;
}