protected IEncoder(Schema schema, ArrayAccess arrayAccess, MapAccess mapAccess)
{
Schema = schema;
_arrayAccess = arrayAccess;
_mapAccess = mapAccess;
_writer = ResolveWriter(schema);
}
protected PreresolvingDatumWriter(Schema schema, ArrayAccess arrayAccess, MapAccess mapAccess)
{
Schema = schema;
_arrayAccess = arrayAccess;
_mapAccess = mapAccess;
_writer = ResolveWriter(schema);
}
internal MapViewStream(MemoryMappedFile backingFile, long mapSize, bool isWriteable)
{
if (backingFile == null)
{
throw new MMException("MapViewStream.MapViewStream - backingFile is null");
}
if (!backingFile.IsOpen)
{
throw new MMException("MapViewStream.MapViewStream - backingFile is not open");
}
if ((mapSize < 1) || (mapSize > backingFile.MaxSize))
{
throw new MMException(string.Format("MapViewStream.MapViewStream - mapSize is invalid. mapSize == {0}, backingFile.MaxSize == {1}", mapSize, backingFile.MaxSize));
}
_backingFile = backingFile;
_isWriteable = isWriteable;
_access = isWriteable ? MapAccess.FileMapWrite : MapAccess.FileMapRead;
_mapSize = mapSize;
_isOpen = true;
Seek(0, SeekOrigin.Begin);
}
public Stream MapView(MapAccess access, long offset, IntPtr size)
{
if (!IsOpen)
{
throw new ObjectDisposedException("MMF already closed");
}
IntPtr baseAddress = IntPtr.Zero;
baseAddress = Win32MapApis.MapViewOfFile(
_hMap, (int)access,
(int)((offset >> 32) & 0xFFFFFFFF),
(int)(offset & 0xFFFFFFFF), size
);
if (baseAddress == IntPtr.Zero)
{
throw new FileMapIOException(Marshal.GetHRForLastWin32Error());
}
// Find out what MapProtection to use
// based on the MapAccess flags...
MapProtection protection;
if (access == MapAccess.FileMapRead)
{
protection = MapProtection.PageReadOnly;
}
else
{
protection = MapProtection.PageReadWrite;
}
return(new MapViewStream(baseAddress, size.ToInt64(), protection));
}
/// <summary>
/// Constructor used internally by MemoryMappedFile.
/// </summary>
/// <param name="backingFile">Preconstructed MemoryMappedFile</param>
/// <param name="mapSize">Size of the view, in bytes.</param>
/// <param name="isWriteable">True if Read/Write access is desired, False otherwise</param>
internal MapViewStream(MemoryMappedFile backingFile, long mapSize, bool isWriteable)
{
if (backingFile == null)
{
throw new Exception("MapViewStream.MapViewStream - backingFile is null");
}
if (!backingFile.IsOpen)
{
throw new Exception("MapViewStream.MapViewStream - backingFile is not open");
}
if ((mapSize < 1) || (mapSize > backingFile.MaxSize))
{
throw new Exception(string.Format("MapViewStream.MapViewStream - mapSize is invalid. mapSize == {0}, backingFile.MaxSize == {1}", mapSize, backingFile.MaxSize));
}
_backingFile = backingFile;
_isWriteable = isWriteable;
_access = isWriteable ? MapAccess.FileMapWrite : MapAccess.FileMapRead;
// Need a backingFile.SupportsAccess function that takes a MapAccess compares it against its stored MapProtection protection and returns bool
_mapSize = mapSize;
_isOpen = true;
// Map the first view
Seek(0, SeekOrigin.Begin);
}
public IntPtr Map(MapAccess access)
{
unsafe
{
var result = Gl.MapBuffer(Target, (uint)access);
GlHelper.GetError();
return(new IntPtr(result));
}
}
private object ReadMap(object reuse, Decoder decoder, MapAccess mapAccess, ReadItem valueReader)
{
object map = mapAccess.Create(reuse);
for (int n = (int)decoder.ReadMapStart(); n != 0; n = (int)decoder.ReadMapNext())
{
mapAccess.AddElements(map, n, valueReader, decoder, false);
}
return(map);
}
/// <summary>
/// Open an existing named File Mapping object
/// </summary>
/// <param name="access">desired access to the map</param>
/// <param name="name">name of object</param>
/// <returns>The memory mapped file instance</returns>
public static MemoryMappedFile Open(MapAccess access, String name)
{
MemoryMappedFile map = new MemoryMappedFile();
map._hMap = Win32MapApis.OpenFileMapping((int)access, false, name);
if (map._hMap == NULL_HANDLE)
throw new FileMapIOException(Marshal.GetHRForLastWin32Error());
return map;
}
/// <summary>
///
/// </summary>
/// <param name="fileName"></param>
/// <param name="protection"></param>
/// <param name="access"></param>
/// <param name="maxSize"></param>
/// <param name="name"></param>
public MemoryMappedFile(String fileName, MapProtection protection, MapAccess access,
long maxSize, String name)
{
//try to open the mmf by name. if failed create the file and mmf.
IntPtr hFile = IntPtr.Zero;
try
{
m_hMap = Win32MapApis.OpenFileMapping((int)access, false, name);
if (m_hMap == NULL_HANDLE)
{
int desiredAccess = GENERIC_READ;
if ((protection == MapProtection.PageReadWrite) ||
(protection == MapProtection.PageWriteCopy))
{
desiredAccess |= GENERIC_WRITE;
}
hFile = Win32MapApis.CreateFile(
GetMMFDir() + fileName, desiredAccess, 0,
IntPtr.Zero, OPEN_ALWAYS, 0, IntPtr.Zero
);
if (hFile != NULL_HANDLE)
{
m_hMap = Win32MapApis.CreateFileMapping(
hFile, IntPtr.Zero, (int)protection,
0,
(int)(maxSize & 0xFFFFFFFF), name
);
if (m_hMap != NULL_HANDLE)
{
m_maxSize = maxSize;
}
else
{
throw new FileMapIOException(Marshal.GetHRForLastWin32Error());
}
}
else
{
throw new FileMapIOException(Marshal.GetHRForLastWin32Error());
}
}
}
catch (Exception Err)
{
throw Err;
}
finally
{
if (!(hFile == NULL_HANDLE))
{
Win32MapApis.CloseHandle(hFile);
}
}
}
/// <summary>
/// Open an existing named File Mapping object
/// </summary>
/// <param name="access">desired access to the map</param>
/// <param name="name">name of object</param>
/// <returns>The memory mapped file instance</returns>
public static MemoryMappedFile Open(MapAccess access, String name)
{
MemoryMappedFile map = new MemoryMappedFile
{
_hMap = Win32MapApis.OpenFileMapping((int)access, false, name)
};
if (map._hMap == NULL_HANDLE)
{
throw new FileMapIOException(Marshal.GetHRForLastWin32Error());
}
map._maxSize = -1; // debug unknown
return(map);
}
/// <summary>
/// Open an existing named File Mapping object
/// </summary>
/// <param name="access">desired access to the map</param>
/// <param name="name">name of object</param>
/// <returns>The memory mapped file instance</returns>
public static MemoryMappedFile Open(MapAccess access, String name)
{
MemoryMappedFile map = new MemoryMappedFile();
// Debug.Log("mem map start");
map._hMap = Win32MapApis.OpenFileMapping((int)access, false, name);
if (map._hMap == NULL_HANDLE)
{
// Debug.Log("mem map doesnt exist");
return(null);
}
//throw new FileMapIOException ( Marshal.GetHRForLastWin32Error() );
return(map);
}
/// <summary>
///
/// </summary>
/// <param name="access"></param>
/// <param name="name"></param>
public bool Open(MapAccess access, String name)
{
bool RV = true;
try
{
m_hMap = Win32MapApis.OpenFileMapping((int)access, false, name);
if (m_hMap == NULL_HANDLE)
{
RV = false;
}
return(RV);
}
catch
{
return(RV);
}
}
/// <summary>
///
/// </summary>
/// <param name="access"></param>
/// <param name="offset"></param>
/// <param name="size"></param>
/// <param name="path"></param>
/// <returns></returns>
public MapViewStream MapView(MapAccess access, long offset, int size, string path)
{
IntPtr baseAddress = IntPtr.Zero;
try
{
baseAddress = Win32MapApis.MapViewOfFile(
m_hMap, (int)access,
(int)((offset >> 32) & 0xFFFFFFFF),
(int)(offset & 0xFFFFFFFF), size
);
if (baseAddress != IntPtr.Zero)
{
MapProtection protection;
if (access == MapAccess.FileMapRead)
{
protection = MapProtection.PageReadOnly;
}
else
{
protection = MapProtection.PageReadWrite;
}
if (path != "")
{
System.IO.FileInfo oFi = new System.IO.FileInfo(GetMMFDir() + path);
m_maxSize = (int)oFi.Length;
}
return(new MapViewStream(baseAddress, m_maxSize, protection));
}
return(null);
}
catch
{
throw new FileMapIOException(Marshal.GetHRForLastWin32Error());
}
}
public IntPtr MapView(MapAccess access, long offset, long size)
{
if (!IsOpen)
{
throw new ObjectDisposedException("Memmoryfile Already closed");
}
IntPtr mapSize = new IntPtr(size);
IntPtr baseAddress = Win32MapApis.MapViewOfFile(
_hMap, (int)access,
(int)((offset >> 32) & 0xFFFFFFFF),
(int)(offset & 0xFFFFFFFF), mapSize
);
if (baseAddress == IntPtr.Zero)
{
throw new MMException(Marshal.GetHRForLastWin32Error());
}
return(baseAddress);
}
public IntPtr MapView(MapAccess access, long offset, long size)
{
if (!IsOpen)
{
throw new ObjectDisposedException("Winterdom.IO.FileMap.MemoryMappedFile.MapView - MMF already closed");
}
// Throws OverflowException if (a) this is a 32-bit platform AND (b) size is out of bounds (ie. int bounds) with respect to this platform
IntPtr mapSize = new IntPtr(size);
IntPtr baseAddress = Win32MapApis.MapViewOfFile(
_hMap, (int)access,
(int)((offset >> 32) & 0xFFFFFFFF),
(int)(offset & 0xFFFFFFFF), mapSize
);
if (baseAddress == IntPtr.Zero)
{
throw new FileMapIOException(Marshal.GetHRForLastWin32Error());
}
return(baseAddress);
}
public IntPtr Map(int offset, int length, MapAccess access)
{
context.Bindings.Buffers.ByTarget(target).Set(this);
return(GL.MapBufferRange((int)target, (IntPtr)offset, (IntPtr)length, (int)access));
}
/// <summary>
/// Map a view of the file mapping object
/// This returns a stream, giving you easy access to the memory,
/// as you can use StreamReaders and StreamWriters on top of it
/// </summary>
/// <param name="access">desired access to the view</param>
/// <param name="offset">offset of the file mapping object to
/// start view at</param>
/// <param name="size">size of the view</param>
public Stream MapView( MapAccess access, long offset, int size )
{
if ( !IsOpen )
throw new ObjectDisposedException("MMF already closed");
IntPtr baseAddress = IntPtr.Zero;
baseAddress = Win32MapApis.MapViewOfFile (
_hMap, (int)access,
(int)((offset >> 32) & 0xFFFFFFFF),
(int)(offset & 0xFFFFFFFF), size
);
if ( baseAddress == IntPtr.Zero )
throw new FileMapIOException ( Marshal.GetHRForLastWin32Error() );
// Find out what MapProtection to use
// based on the MapAccess flags...
MapProtection protection;
if ( access == MapAccess.FileMapRead )
protection = MapProtection.PageReadOnly;
else
protection = MapProtection.PageReadWrite;
return new MapViewStream ( baseAddress, size, protection );
}
/// <summary>
/// Open an existing named File Mapping object
/// </summary>
/// <param name="access">desired access to the map</param>
/// <param name="name">name of object</param>
/// <returns>The memory mapped file instance</returns>
public static MemoryMappedFile Open( MapAccess access, String name )
{
MemoryMappedFile map = new MemoryMappedFile();
map._hMap = Win32MapApis.OpenFileMapping ( (int)access, false, name );
if ( map._hMap == NULL_HANDLE )
throw new FileMapIOException ( Marshal.GetHRForLastWin32Error() );
return map;
}
/// <summary>
/// Map a view of the file mapping object
/// This returns a stream, giving you easy access to the memory,
/// as you can use StreamReaders and StreamWriters on top of it
/// </summary>
/// <param name="access">desired access to the view</param>
/// <param name="offset">offset of the file mapping object to
/// start view at</param>
/// <param name="size">size of the view</param>
public Stream MapView(MapAccess access, long offset, int size)
{
// Debug.Log("start mapview with size "+ size);
return(MapView(access, offset, new IntPtr(size)));
}
public IntPtr MapView(MapAccess access, long offset, long size)
{
if (!IsOpen)
throw new ObjectDisposedException("Winterdom.IO.FileMap.MemoryMappedFile.MapView - MMF already closed");
// Throws OverflowException if (a) this is a 32-bit platform AND (b) size is out of bounds (ie. int bounds) with respect to this platform
IntPtr mapSize = new IntPtr(size);
IntPtr baseAddress = Win32MapApis.MapViewOfFile(
_hMap, (int)access,
(int)((offset >> 32) & 0xFFFFFFFF),
(int)(offset & 0xFFFFFFFF), mapSize
);
if (baseAddress == IntPtr.Zero)
throw new FileMapIOException(Marshal.GetHRForLastWin32Error());
return baseAddress;
}
public static extern byte *MapViewOfFile(SafeFileHandle hFileMappingObject, MapAccess dwDesiredAccess, int dwFileOffsetHigh, int dwFileOffsetLow, IntPtr dwNumBytesToMap);
IntPtr _viewBaseAddr = IntPtr.Zero; // Pointer to the base address of the currently mapped view
#endregion Fields
#region Constructors
/// <summary>
/// Constructor used internally by MemoryMappedFile.
/// </summary>
/// <param name="backingFile">Preconstructed MemoryMappedFile</param>
/// <param name="mapSize">Size of the view, in bytes.</param>
/// <param name="isWriteable">True if Read/Write access is desired, False otherwise</param>
internal MapViewStream(MemoryMappedFile backingFile, long mapSize, bool isWriteable)
{
if (backingFile == null)
{
throw new Exception("MapViewStream.MapViewStream - backingFile is null");
}
if (!backingFile.IsOpen)
{
throw new Exception("MapViewStream.MapViewStream - backingFile is not open");
}
if ((mapSize < 1) || (mapSize > backingFile.MaxSize))
{
throw new Exception(string.Format("MapViewStream.MapViewStream - mapSize is invalid. mapSize == {0}, backingFile.MaxSize == {1}", mapSize, backingFile.MaxSize));
}
_backingFile = backingFile;
_isWriteable = isWriteable;
_access = isWriteable ? MapAccess.FileMapWrite : MapAccess.FileMapRead;
// Need a backingFile.SupportsAccess function that takes a MapAccess compares it against its stored MapProtection protection and returns bool
_mapSize = mapSize;
_isOpen = true;
// Map the first view
Seek(0, SeekOrigin.Begin);
}
/// <summary>
/// Map a view of the file mapping object
/// This returns a stream, giving you easy access to the memory,
/// as you can use StreamReaders and StreamWriters on top of it
/// </summary>
/// <param name="access">desired access to the view</param>
/// <param name="offset">offset of the file mapping object to
/// start view at</param>
/// <param name="size">size of the view</param>
public Stream MapView(MapAccess access, long offset, int size)
{
return(MapView(access, offset, new IntPtr(size)));
}
/// <summary>
///
/// </summary>
/// <param name="FileName"></param>
/// <param name="protection"></param>
/// <param name="name"></param>
/// <param name="access"></param>
/// <returns></returns>
public bool OpenEx(string FileName, MapProtection protection, string name, MapAccess access)
{
bool RV = false;
m_hMap = Win32MapApis.OpenFileMapping((int)access, false, name);
if (m_hMap == NULL_HANDLE)
{
if (System.IO.File.Exists(GetMMFDir() + FileName))
{
long maxSize;
System.IO.FileStream stream = System.IO.File.Open(GetMMFDir() + FileName, System.IO.FileMode.Open);
maxSize = stream.Length;
stream.Close();
IntPtr hFile = INVALID_HANDLE_VALUE;
OFSTRUCT ipStruct = new OFSTRUCT();
string MMFName = GetMMFDir() + FileName;
hFile = Win32MapApis.OpenFile(MMFName,
ipStruct
, 2);
// determine file access needed
// we'll always need generic read access
int desiredAccess = GENERIC_READ;
if ((protection == MapProtection.PageReadWrite) ||
(protection == MapProtection.PageWriteCopy))
{
desiredAccess |= GENERIC_WRITE;
}
// open or create the file
// if it doesn't exist, it gets created
m_hMap = Win32MapApis.CreateFileMapping(
hFile, IntPtr.Zero, (int)protection,
(int)((maxSize >> 32) & 0xFFFFFFFF),
(int)(maxSize & 0xFFFFFFFF), name
);
// close file handle, we don't need it
if (!(hFile == NULL_HANDLE))
{
Win32MapApis.CloseHandle(hFile);
}
RV = true;
}
}
else
{
RV = true;
}
return(RV);
}
/// <summary>
/// Map a view of the file mapping object
/// This returns a stream, giving you easy access to the memory,
/// as you can use StreamReaders and StreamWriters on top of it
/// </summary>
/// <param name="access">desired access to the view</param>
/// <param name="offset">offset of the file mapping object to
/// start view at</param>
/// <param name="size">size of the view</param>
public Stream MapView(MapAccess access, long offset, int size)
{
return MapView(access, offset, new IntPtr(size));
}
public IntPtr Map(int offset, int length, MapAccess access)
{
context.Bindings.Buffers.ByTarget(target).Set(this);
return GL.MapBufferRange((int)target, (IntPtr)offset, (IntPtr)length, (int)access);
}
