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56 lines
1.7 KiB
C++
56 lines
1.7 KiB
C++
// SharedMemory.h: interface for the CSharedMemory class.
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//
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//////////////////////////////////////////////////////////////////////
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#if !defined(AFX_SHAREDMEMORY_H__D6015341_E3F1_11D7_89BD_000629A6E157__INCLUDED_)
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#define AFX_SHAREDMEMORY_H__D6015341_E3F1_11D7_89BD_000629A6E157__INCLUDED_
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#if _MSC_VER > 1000
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#pragma once
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#endif // _MSC_VER > 1000
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#ifdef BUILD_MCCTRDLL
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#define MCCTRDLLCLASS __declspec(dllexport)
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#else
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#define MCCTRDLLCLASS __declspec(dllimport)
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#endif
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class MCCTRDLLCLASS CSharedMemory : public CObject
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{
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public:
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CSharedMemory();
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virtual ~CSharedMemory();
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DWORD CreateSharedMem(LPCTSTR pszName, DWORD dwBytes);
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// Will return 0 or ERROR_ALREADY_EXISTS if it already exists.
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LPVOID Open(DWORD dwTimeout = INFINITE); // SM must be opened before use. The pointer
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// returns must be type casted to it type
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// Returns NULL if the SM was not created ot failed
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BOOL Close(); // SM should be closed after use so that others can open the SM
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BOOL IsOpen()
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{
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return m_bOpen;
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} // Check if SM is opened
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DWORD GetLength()
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{
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return m_dwLength;
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}
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#ifdef _DEBUG
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virtual void AssertValid() const;
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virtual void Dump(CDumpContext& dc) const;
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#endif
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protected:
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DECLARE_DYNAMIC(CSharedMemory)
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private:
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HANDLE m_hMutex;
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LPVOID m_pvData;
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HANDLE m_hMapping;
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BOOL m_bOpen;
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DWORD m_dwLength;
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};
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#endif // !defined(AFX_SHAREDMEMORY_H__D6015341_E3F1_11D7_89BD_000629A6E157__INCLUDED_)
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