1 files changed, 66 insertions, 0 deletions

diff --git a/CPP/Windows/FileMapping.h b/CPP/Windows/FileMapping.h
new file mode 100644
index 0000000..f90c429
--- /dev/null
+++ b/CPP/Windows/FileMapping.h
@@ -0,0 +1,66 @@
+// Windows/FileMapping.h
+
+#ifndef __WINDOWS_FILEMAPPING_H
+#define __WINDOWS_FILEMAPPING_H
+
+#include "../Common/MyTypes.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
+      #ifndef UNDER_CE
+      desiredAccess
+      #endif
+      , 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