62 lines
1.2 KiB
C
62 lines
1.2 KiB
C
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//Copyright (c) 1997-2000 Microsoft Corporation
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//
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// This header contains classes used to manage the memory mapped file for this DLL
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//
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class CScopeMutex
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{
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public:
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CScopeMutex()
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: m_hMutex(0)
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{};
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~CScopeMutex() { MutexRelease(); }
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BOOL Create(LPCTSTR szMutex, unsigned long ulWait)
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{
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m_hMutex = CreateMutex( NULL, FALSE, szMutex );
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if (m_hMutex)
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{
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WaitForSingleObject(m_hMutex, ulWait);
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return TRUE;
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}
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DBPRINTF(TEXT("CScopeMutex::Create FAILED\r\n"));
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return FALSE;
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}
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void Release()
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{
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MutexRelease();
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}
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private:
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HANDLE m_hMutex;
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inline void MutexRelease()
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{
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if (m_hMutex)
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{
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ReleaseMutex(m_hMutex);
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CloseHandle(m_hMutex);
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m_hMutex = 0;
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}
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}
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};
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class CMemMappedFile
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{
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public:
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CMemMappedFile()
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: m_hMappedFile(0)
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, m_pvMappedAddr(0)
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, m_fFirstOpen(FALSE)
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{};
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~CMemMappedFile() { Close(); }
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BOOL Open(LPCTSTR szName, unsigned long ulMemSize);
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BOOL AccessMem(void **ppvMappedAddr);
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void Close();
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BOOL FirstOpen() { return m_fFirstOpen; }
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private:
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HANDLE m_hMappedFile;
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void *m_pvMappedAddr;
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BOOL m_fFirstOpen;
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};
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