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// Windows/FileMapping.h
#ifndef __WINDOWS_FILEMAPPING_H
#define __WINDOWS_FILEMAPPING_H
#include "Common/Types.h"
#include "Handle.h"
namespace NWindows {
class CFileMapping: public CHandle
{
public:
WRes Create(DWORD protect, UInt64 maxSize, LPCTSTR name)
{
_handle = ::CreateFileMapping(INVALID_HANDLE_VALUE, NULL, protect, (DWORD)(maxSize >> 32), (DWORD)maxSize, name);
return ::GetLastError();
}
WRes Open(DWORD desiredAccess, LPCTSTR name)
{
#ifdef UNDER_CE
WRes res = Create(PAGE_READONLY, 0, name);
if (res == ERROR_ALREADY_EXISTS)
return 0;
Close();
if (res == 0)
res = ERROR_FILE_NOT_FOUND;
return res;
#else
_handle = ::OpenFileMapping(desiredAccess, FALSE, name);
if (_handle != 0)
return 0;
return ::GetLastError();
#endif
}
LPVOID Map(DWORD desiredAccess, UInt64 fileOffset, SIZE_T numberOfBytesToMap)
{
return ::MapViewOfFile(_handle, desiredAccess, (DWORD)(fileOffset >> 32), (DWORD)fileOffset, numberOfBytesToMap);
}
#ifndef UNDER_CE
LPVOID Map(DWORD desiredAccess, UInt64 fileOffset, SIZE_T numberOfBytesToMap, LPVOID baseAddress)
{
return ::MapViewOfFileEx(_handle, desiredAccess, (DWORD)(fileOffset >> 32), (DWORD)fileOffset, numberOfBytesToMap, baseAddress);
}
#endif
};
class CFileUnmapper
{
const void *_data;
public:
CFileUnmapper(const void *data) : _data(data) {}
~CFileUnmapper() { ::UnmapViewOfFile(_data); }
};
}
#endif
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