Thread synchronization--Using a critical section

A critical section is an easy way to ensure that only one thread at a time can access data. Regardless of which thread occupies the critical section object, it can access the protected data, while the other threads must wait until the thread that occupies the critical section is released, so that the data in the critical section is not accessed by more than one thread at the same time.

In MFC, the Cctiticalsection class is used to create a critical section instance, such as:CCriticalSection CriticalSection;

When a thread is ready to access data in a critical area, its member function lock () must be called to lock (), such as: CriticalSecion.Lock(); if no thread occupies a critical section, lock () can provide access to the critical section data to the calling purebred, and then call the member function unlock () when the thread completes each data operation. For release, other threads can occupy the critical section. For example, CriticalSection.UnLock(); you can define a data instance:class CDataArray
{
private:
　　int iArray[10];
　　CCriticalSection CriticalSection;
public:
　　CDataArray(){};
　　~CDataArray(){};
　　void SetData(int iValue);
　　void GetDataArray(int aArray[10]);
};