How to use CMutex, CSemaphore in VC++ MFC
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Answer / Ravi Prakash Gupta
CMutex and CSemaphore are used for synchronization in Multi-Threaded Programming in Microsoft Foundation Classes (MFC). Here's an example of how to use a CMutex: 1. Include the necessary header files: #include <afxmt.h>
2. Create a global or local CMutex object:nCMutex m_mutex;
3. Lock the mutex before critical sections of code: m_mutex.Lock();
4. Unlock the mutex after the critical section:nm_mutex.Unlock();nFor CSemaphore, you can use it to limit the number of threads accessing a particular resource. Here's an example: 1. Include the necessary header files: #include <afxmt.h>
2. Create a global or local CSemaphore object:nCSemaphore m_sem(5); // Initialize with 5 available semaphores
3. Wait for a semaphore before accessing a resource: m_sem.Lock();
4. Release the semaphore after completing the critical section: m_sem.Unlock();
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