summaryrefslogtreecommitdiffstats
path: root/CPP/Windows/FileMapping.h
diff options
context:
space:
mode:
Diffstat (limited to 'CPP/Windows/FileMapping.h')
-rwxr-xr-xCPP/Windows/FileMapping.h62
1 files changed, 62 insertions, 0 deletions
diff --git a/CPP/Windows/FileMapping.h b/CPP/Windows/FileMapping.h
new file mode 100755
index 0000000..138a175
--- /dev/null
+++ b/CPP/Windows/FileMapping.h
@@ -0,0 +1,62 @@
+// 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