ATL 引用计数线程模型

只为记录

1. CComSingleThreadModel Provides methods for incrementing and decrementing a variable. Does not provide a critical section.
2. CComMultiThreadModel Provides thread-safe methods for incrementing and decrementing a variable. Provides a critical section.
3. CComMultiThreadModelNoCS Provides thread-safe methods for incrementing and decrementing a variable. Does not provide a critical sectio
4. CComObjectThreadModel Determines the appropriate threading-model class for a single object class.
5. CComGlobalsThreadModel Determines the appropriate threading-model class for an object that is globally available.

class CComMultiThreadModelNoCS
{
public:
    static ULONG WINAPI Increment(_Inout_ LPLONG p) throw()
    {
        return InterlockedIncrement(p);
    }
    static ULONG WINAPI Decrement(_Inout_ LPLONG p) throw()
    {
        return InterlockedDecrement(p);
    }
    typedef CComFakeCriticalSection AutoCriticalSection;
    typedef CComFakeCriticalSection AutoDeleteCriticalSection;
    typedef CComFakeCriticalSection CriticalSection;
    typedef CComMultiThreadModelNoCS ThreadModelNoCS;
};

class CComMultiThreadModel
{
public:
    static ULONG WINAPI Increment(_Inout_ LPLONG p) throw()
    {
        return InterlockedIncrement(p);
    }
    static ULONG WINAPI Decrement(_Inout_ LPLONG p) throw()
    {
        return InterlockedDecrement(p);
    }
    typedef CComAutoCriticalSection AutoCriticalSection;
    typedef CComAutoDeleteCriticalSection AutoDeleteCriticalSection;
    typedef CComCriticalSection CriticalSection;
    typedef CComMultiThreadModelNoCS ThreadModelNoCS;
};

class CComSingleThreadModel
{
public:
    static ULONG WINAPI Increment(_Inout_ LPLONG p) throw()
    {
        return ++(*p);
    }
    static ULONG WINAPI Decrement(_Inout_ LPLONG p) throw()
    {
        return --(*p);
    }
    typedef CComFakeCriticalSection AutoCriticalSection;
    typedef CComFakeCriticalSection AutoDeleteCriticalSection;
    typedef CComFakeCriticalSection CriticalSection;
    typedef CComSingleThreadModel ThreadModelNoCS;
};