27.mutex跨进程通信

• 创建互斥量mutex

  HANDLE mutex = CreateMutexA(NULL, TRUE, name);

• 根据id打开mutex

  HANDLE mutex = OpenMutexA(MUTEX_ALL_ACCESS,TRUE,name);

• 监听

  DWORD res = WaitForSingleObject(mutex, 20000);

• 判断事件

  switch (res)
      {
      case WAIT_OBJECT_0:
          printf("收到信号-------");
          break;
      case WAIT_TIMEOUT:
          printf("超时没有收到-------");
          break;
      case WAIT_ABANDONED:
          printf("另外一个进程意外终止-------");
          break;
      default:
          break;
  
      }

mutex.c

#include <stdio.h>
#include <stdlib.h>
#include <Windows.h>

char name[100] = "haihualovefang";

void main()
{
    HANDLE mutex = CreateMutexA(NULL, TRUE, name);
    printf("创建成功");
    char ch = getch();

    ReleaseMutex(mutex);
    printf("触发互斥量");
    CloseHandle(mutex);


}

wait.c

#include <stdio.h>
#include <stdlib.h>
#include <Windows.h>

char name[100] = "myevent";

void main()
{
    HANDLE event = OpenEventA(EVENT_ALL_ACCESS, TRUE, name);//打开事件

    if (event == NULL)
    {
        printf("打开失败");
        system("pause");
        return;
    }
    printf("等待-------");
    DWORD res = WaitForSingleObject(event, 20000);
    switch (res)
    {
    case WAIT_OBJECT_0:
        printf("收到信号-------");
        break;
    case WAIT_TIMEOUT:
        printf("超时没有收到-------");
        break;
    case WAIT_ABANDONED:
        printf("另外一个进程意外终止-------");
        break;
    default:
        break;

    }
    CloseHandle(event);




    system("pause");
}