- // Lock.h: interface for the CLockXXXX class.
- //
- //////////////////////////////////////////////////////////////////////
- #if !defined(AFX_LOCK_H__F65AF80D_9748_4100_B0AC_823695855E5D__INCLUDED_)
- #define AFX_LOCK_H__F65AF80D_9748_4100_B0AC_823695855E5D__INCLUDED_
- class ALock
- {
- protected:
- ALock() {}
- virtual ~ALock() {}
- public:
- virtual void EnterRead() = 0;
- virtual void LeaveRead() = 0;
- virtual void EnterWrite() = 0;
- virtual void LeaveWrite() = 0;
- };
- //lock: single read & single write (critical section)
- //reading and writing is exclusive
- class CLockSRSW : public ALock
- {
- public:
- CLockSRSW();
- ~CLockSRSW();
- public:
- virtual void EnterRead();
- virtual void LeaveRead();
- virtual void EnterWrite();
- virtual void LeaveWrite();
- private:
- CRITICAL_SECTION m_csExclusive;
- };
- //lock: multi read & single write
- //reading is parallel, and writing is exclusive
- class CLockMRSW : public ALock
- {
- public:
- CLockMRSW();
- ~CLockMRSW();
- public:
- virtual void EnterRead();
- virtual void LeaveRead();
- virtual void EnterWrite();
- virtual void LeaveWrite();
- private:
- CRITICAL_SECTION m_csExclusive;
- CRITICAL_SECTION m_csModi;
- HANDLE m_eventIdle;
- LONG m_lUsing;
- };
- //assistant
- struct KAutoLockRead
- {
- ALock& theLock;
- KAutoLockRead(ALock& locksrc) : theLock(locksrc) {theLock.EnterRead();}
- ~KAutoLockRead() {theLock.LeaveRead();}
- };
- struct KAutoLockWrite
- {
- ALock& theLock;
- KAutoLockWrite(ALock& locksrc) : theLock(locksrc) {theLock.EnterWrite();}
- ~KAutoLockWrite() {theLock.LeaveWrite();}
- };
- //for more easy
- #define AUTOLOCKREAD(lock)
- KAutoLockRead __local_autolockread_(lock);
- #define AUTOLOCKREAD_(name, lock)
- KAutoLockRead name(lock);
- #define AUTOLOCKWRITE(lock)
- KAutoLockWrite __local_autolockwrite_(lock);
- #define AUTOLOCKWRITE_(name, lock)
- KAutoLockWrite name(lock);
- #endif // !defined(AFX_LOCK_H__F65AF80D_9748_4100_B0AC_823695855E5D__INCLUDED_)