148 lines
2 KiB
C
148 lines
2 KiB
C
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// sync.h -- defines the CSyncWith class
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#ifndef __SYNC_H__
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#define __SYNC_H__
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class CITCriticalSection
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{
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public:
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CITCriticalSection();
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~CITCriticalSection();
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void Enter();
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void Leave();
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#ifdef _DEBUG
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LONG LockCount();
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#endif // _DEBUG
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private:
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void Start();
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void Stop();
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CRITICAL_SECTION m_cs;
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#ifdef _DEBUG
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LONG m_ulOwningThread;
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LONG m_cLockRecursion;
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#endif // _DEBUG
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};
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inline CITCriticalSection::CITCriticalSection()
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{
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Start();
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}
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inline void CITCriticalSection::Start()
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{
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InitializeCriticalSection(&m_cs);
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#ifdef _DEBUG
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m_ulOwningThread = ~0;
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m_cLockRecursion = 0;
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#endif // _DEBUG
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}
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inline void CITCriticalSection::Stop()
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{
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DeleteCriticalSection(&m_cs);
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RonM_ASSERT(m_ulOwningThread == ~0);
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RonM_ASSERT(m_cLockRecursion == 0);
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}
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inline CITCriticalSection::~CITCriticalSection()
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{
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Stop();
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}
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inline void CITCriticalSection::Enter()
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{
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::EnterCriticalSection(&m_cs);
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#ifdef _DEBUG
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RonM_ASSERT(m_cLockRecursion || m_ulOwningThread == ~0);
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if (!m_cLockRecursion++)
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m_ulOwningThread = GetCurrentThreadId();
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#endif // _DEBUG
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}
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#ifdef _DEBUG
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inline LONG CITCriticalSection::LockCount()
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{
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return (m_ulOwningThread == GetCurrentThreadId())? m_cLockRecursion : 0;
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}
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#endif // _DEBUG
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inline void CITCriticalSection::Leave()
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{
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#ifdef _DEBUG
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RonM_ASSERT(m_cLockRecursion > 0);
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if (!--m_cLockRecursion)
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m_ulOwningThread = ~0;
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#endif // _DEBUG
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::LeaveCriticalSection(&m_cs);
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}
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class CSyncWith
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{
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public:
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CSyncWith(CITCriticalSection &refcs);
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~CSyncWith();
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private:
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CITCriticalSection *m_pcs;
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#ifdef _DEBUG
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LONG m_cLocksPrevious;
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#endif // _DEBUG
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};
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inline CSyncWith::CSyncWith(CITCriticalSection &refcs)
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{
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m_pcs = &refcs;
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#ifdef _DEBUG
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m_cLocksPrevious = m_pcs->LockCount();
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#endif // _DEBUG
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m_pcs->Enter();
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}
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inline CSyncWith::~CSyncWith()
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{
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m_pcs->Leave();
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#ifdef _DEBUG
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LONG cLocks = m_pcs->LockCount();
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RonM_ASSERT(cLocks == m_cLocksPrevious);
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#endif // _DEBUG
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}
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#ifdef _DEBUG
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inline BOOL IsUnlocked(CITCriticalSection &refcs)
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{
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return refcs.LockCount() == 0;
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}
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#endif // _DEBUG;
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#endif // __SYNC_H__
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