CSemaphore实现线程同步例子

使用CSemaphore实现线程同步

最新推荐文章于 2019-06-15 11:21:07 发布

原创最新推荐文章于 2019-06-15 11:21:07 发布 · 358 阅读

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#semaphore #null #工作

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加库：

#include <afxmt.h>

申明全局：

UINT SemaphoreThread1(LPVOID pParam);
UINT SemaphoreThread2(LPVOID pParam);
UINT SemaphoreThread3(LPVOID pParam);

CSemaphore m_Semaphore(2, 2, NULL);
int g_sharedata = 0;

定义3个按钮：

void CSemaphoreDlg::OnRun1()
{
// TODO: Add your control notification handler code here
//获取窗口句柄
HWND hWnd = GetSafeHwnd();
//产生新的线程
AfxBeginThread(SemaphoreThread1, hWnd);

}

void CSemaphoreDlg::OnRun2()
{
// TODO: Add your control notification handler code here
//获取窗口句柄
HWND hWnd = GetSafeHwnd();
//产生新的线程
AfxBeginThread(SemaphoreThread2, hWnd);

}

void CSemaphoreDlg::OnRun3()
{
// TODO: Add your control notification handler code here
//获取窗口句柄
HWND hWnd = GetSafeHwnd();
//产生新的线程
AfxBeginThread(SemaphoreThread3, hWnd);
}

定义3个工作线程：

UINT SemaphoreThread1(LPVOID pParam)
{
HWND hWnd = (HWND)pParam;

while(1)
{
CString str;

  m_Semaphore.Lock();
  str = "锁定";
  ::SetDlgItemText((HWND)pParam, IDC_EDITTEXT1, str);
  ::Sleep(1000);

  g_sharedata++;

  str.Format("%d", g_sharedata);
  ::SetDlgItemText((HWND)pParam, IDC_EDIT1, str);

::Sleep(1000);
m_Semaphore.Unlock();

  str = "解锁";
  ::SetDlgItemText((HWND)pParam, IDC_EDITTEXT1, str);
  ::Sleep(1000);

}

return 0;
}

UINT SemaphoreThread2(LPVOID pParam)
{
HWND hWnd = (HWND)pParam;

while(1)
{
  CString str;
  m_Semaphore.Lock();
  str = "锁定";
  ::SetDlgItemText((HWND)pParam, IDC_EDITTEXT2, str);
  ::Sleep(1000);

  str.Format("%d", g_sharedata);
  ::SetDlgItemText((HWND)pParam, IDC_EDIT2, str);

  ::Sleep(1000);
  m_Semaphore.Unlock();
  str = "解锁";
  ::SetDlgItemText((HWND)pParam, IDC_EDITTEXT2, str);
  ::Sleep(1000);

}

return 0;
}

UINT SemaphoreThread3(LPVOID pParam)
{
HWND hWnd = (HWND)pParam;

while(1)
{
CString str;

  m_Semaphore.Lock();
  str = "锁定";
  ::SetDlgItemText((HWND)pParam, IDC_EDITTEXT3, str);
  ::Sleep(1000);

str.Format("%d", g_sharedata);
::SetDlgItemText((HWND)pParam, IDC_EDIT3, str);

  ::Sleep(1000);
  m_Semaphore.Unlock();
  str = "解锁";
  ::SetDlgItemText((HWND)pParam, IDC_EDITTEXT3, str);
  ::Sleep(1000);

}

return 0;
}