ATL Internals 2ed复习.chapter 4.Thread

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Instance Data Synchronization

CComCriticalSection：使用Init()生成，Term()销毁

CComAutoCriticalSection：使用构造函数生成，析构函数销毁

CComSafeDeleteCriticalSection：Init()生成，析构函数销毁

CComAutoDeleteCriticalSection：未定义Term()，用于静态、全局

CComFakeCriticalSection：Init()，Term()，Lock()，Unlock()均为空操作

上述类均需要Lock()锁定，Unlock解锁】

template< class TLock > class CComCritSecLock：构造函数锁定，析构函数解锁

Threading Model Support

ATL提供了3种线程模型：

class CcomSingleThreadModel {                                                public:                                                                          static ULONG WINAPI Increment(LPLONG p) {return ++(*p);}                     static ULONG WINAPI Decrement(LPLONG p) {return (*p);}                      typedef CComFakeCriticalSection AutoCriticalSection;                         typedef CComFakeCriticalSection AutoDeleteCriticalSection;                   typedef CComFakeCriticalSection CriticalSection;                             typedef CComSingleThreadModel ThreadModelNoCS;                           };                                                                                                                                                        class CcomMultiThreadModel {                                                 public:                                                                          static ULONG WINAPI Increment(LPLONG p) {return InterlockedIncrement(p);}    static ULONG WINAPI Decrement(LPLONG p) {return InterlockedDecrement(p);}    typedef CComAutoCriticalSection AutoCriticalSection;                         typedef CComAutoDeleteCriticalSection                                            AutoDeleteCriticalSection;                                               typedef CComCriticalSection CriticalSection;                                 typedef CComMultiThreadModelNoCS ThreadModelNoCS;                        };                                                                                                                                                        class CcomMultiThreadModelNoCS {                                             public:                                                                          static ULONG WINAPI Increment(LPLONG p) {return InterlockedIncrement(p);}    static ULONG WINAPI Decrement(LPLONG p) {return InterlockedDecrement(p);}    typedef CComFakeCriticalSection AutoCriticalSection;                         typedef CComFakeCriticalSection AutoDeleteCriticalSection;                   typedef CComFakeCriticalSection CriticalSection;                             typedef CComMultiThreadModelNoCS ThreadModelNoCS;                        };

CcomSingleThreadModel

CComMultiThreadModel

CComMultiThreadModelNoCS

TM::Increment

++

Interlocked-Increment

TM::Decrement

Interlocked-Decrement

TM::AutoCriticalSection::Lock

(Nothing)

EnterCritical-Section

(Nothing)

TM::AutoCriticalSection::Unlock

(Nothing)

LeaveCritical-Section

(Nothing)