static void Main(string[] args)
{
SafeFileMappingHandle hMapFile = null;
IntPtr pView = IntPtr.Zero;
try
{
// Create the file mapping object.
hMapFile = NativeMethod.CreateFileMapping(
INVALID_HANDLE_VALUE, // Use paging file - shared memory
IntPtr.Zero, // Default security attributes
FileProtection.PAGE_READWRITE, // Allow read and write access
0, // High-order DWORD of file mapping max size
MapSize, // Low-order DWORD of file mapping max size
FullMapName // Name of the file mapping object
);
if (hMapFile.IsInvalid)
{
throw new Win32Exception();
}
Console.WriteLine("The file mapping ({0}) is created", FullMapName);
// Map a view of the file mapping into the address space of the
// current process.
pView = NativeMethod.MapViewOfFile(
hMapFile, // Handle of the map object
FileMapAccess.FILE_MAP_ALL_ACCESS, // Read and write access
0, // High-order DWORD of file offset
ViewOffset, // Low-order DWORD of file offset
ViewSize // Byte# to map to the view
);
if (pView == IntPtr.Zero)
{
throw new Win32Exception();
}
Console.WriteLine("The file view is mapped");
// Prepare a message to be written to the view. Append '\0' to
// mark the end of the string when it is marshaled to the native
// memory.
byte[] bMessage = Encoding.Unicode.GetBytes(Message + '\0');
// Write the message to the view.
Marshal.Copy(bMessage, 0, pView, bMessage.Length);
Console.WriteLine("This message is written to the view:\n\"{0}\"",
Message);
// Wait to clean up resources and stop the process.
Console.Write("Press ENTER to clean up resources and quit");
Console.ReadLine();
}
catch (Exception ex)
{
Console.WriteLine("The process throws the error: {0}", ex.Message);
}
finally
{
if (hMapFile != null)
{
if (pView != IntPtr.Zero)
{
// Unmap the file view.
NativeMethod.UnmapViewOfFile(pView);
pView = IntPtr.Zero;
}
// Close the file mapping object.
hMapFile.Close();
hMapFile = null;
}
}
}
