Using Critical Section Objects (Windows)

Using Critical Section Objects

Using Critical Section Objects

The following example shows how a thread initializes, enters, and releases a critical section. It uses the InitializeCriticalSectionAndSpinCount, EnterCriticalSection, LeaveCriticalSection, and DeleteCriticalSection functions.

// Global variable
CRITICAL_SECTION CriticalSection; 

void main()
{
    ...

    // Initialize the critical section one time only.
    if (!InitializeCriticalSectionAndSpinCount(&CriticalSection, 
        0x80000400) ) 
        return;
    ...

    // Release resources used by the critical section object.
    DeleteCriticalSection(&CriticalSection)
}

DWORD WINAPI ThreadProc( LPVOID lpParameter )
{
    ...

    // Request ownership of the critical section.
    EnterCriticalSection(&CriticalSection); 

    // Access the shared resource.

    // Release ownership of the critical section.
    LeaveCriticalSection(&CriticalSection);

    ...
}

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Build date: 2/4/2010