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95 lines
1.9 KiB
95 lines
1.9 KiB
/*++
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Copyright (c) 2002 Microsoft Corporation
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Module Name:
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rss_cs.hxx
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Abstract:
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CS wrapper class.
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Author:
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Ran Kalach
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Revision History:
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04/22/2002 rankala Copying with some modifications from vss project nt\drivers\storage\volsnap\vss\server\inc\vs_types.hxx
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--*/
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#ifndef _RSSCS_
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#define _RSSCS_
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class CRssCriticalSection
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{
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CRssCriticalSection(const CRssCriticalSection&);
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public:
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// Creates and initializes the critical section
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CRssCriticalSection(
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IN BOOL bThrowOnError = TRUE
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):
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m_bInitialized(FALSE),
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m_lLockCount(0),
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m_bThrowOnError(bThrowOnError)
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{
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HRESULT hr = S_OK;
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try
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{
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// May throw STATUS_NO_MEMORY if memory is low.
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WsbAffirmStatus(InitializeCriticalSectionAndSpinCount(&m_sec, 1000));
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}
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WsbCatch(hr)
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m_bInitialized = SUCCEEDED(hr);
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}
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// Destroys the critical section
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~CRssCriticalSection()
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{
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if (m_bInitialized)
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DeleteCriticalSection(&m_sec);
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}
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// Locks the critical section
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void Lock()
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{
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if (!m_bInitialized)
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if (m_bThrowOnError)
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WsbThrow( E_OUTOFMEMORY );
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EnterCriticalSection(&m_sec);
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InterlockedIncrement((LPLONG)&m_lLockCount);
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}
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// Unlocks the critical section
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void Unlock()
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{
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if (!m_bInitialized)
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if (m_bThrowOnError)
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WsbThrow( E_OUTOFMEMORY );
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InterlockedDecrement((LPLONG) &m_lLockCount);
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LeaveCriticalSection(&m_sec);
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}
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BOOL IsLocked() const { return (m_lLockCount > 0); };
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BOOL IsInitialized() const { return m_bInitialized; };
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private:
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CRITICAL_SECTION m_sec;
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BOOL m_bInitialized;
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BOOL m_bThrowOnError;
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LONG volatile m_lLockCount;
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};
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#endif // _RSSCS_
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