private void WriteMemoryMap(UpdateInfoPacket packet)
{
MemoryMappedViewStream memStream = null;
try
{
//Make sure there is a map first
if (m_memMap == null)
{
return;
}
//Create the view stream
memStream = m_memMap.CreateViewStream();
memStream.Seek(0, SeekOrigin.Begin);
//Create the object to write to the memory map
using (BinaryWriter writer = new BinaryWriter(memStream))
{
//Convert the structure to a byte array
byte[] rawPacket = PacketToBytes(packet);
//Write the byte array to memory
writer.Write(rawPacket);
}
}
catch (Exception ex)
{
//BIG ERROR, report it
System.Diagnostics.Debug.WriteLine("Error " + ex.Message);
}
}
private int PacketSize()
{
UpdateInfoPacket packet = new UpdateInfoPacket();
int size = Marshal.SizeOf(packet);
return(size);
}
private byte[] PacketToBytes(UpdateInfoPacket packet)
{
int size = Marshal.SizeOf(packet);
byte[] array = new byte[size];
IntPtr ptr = Marshal.AllocHGlobal(size);
Marshal.StructureToPtr(packet, ptr, true);
Marshal.Copy(ptr, array, 0, size);
Marshal.FreeHGlobal(ptr);
return(array);
}
private UpdateInfoPacket BytesToPacket(byte[] packet)
{
UpdateInfoPacket structure = new UpdateInfoPacket();
int size = Marshal.SizeOf(structure);
IntPtr ptr = Marshal.AllocHGlobal(size);
Marshal.Copy(packet, 0, ptr, size);
structure = (UpdateInfoPacket)Marshal.PtrToStructure(ptr, structure.GetType());
Marshal.FreeHGlobal(ptr);
return(structure);
}
private void ReadMemoryMap(out UpdateInfoPacket packet)
{
packet = new UpdateInfoPacket();
MemoryMappedViewStream memStream = null;
try
{
//Make sure there is a map first
if (m_memMap == null)
{
return;
}
//Create the view stream
memStream = m_memMap.CreateViewStream();
memStream.Seek(0, SeekOrigin.Begin);
//Create the object to read from the memory map
using (BinaryReader reader = new BinaryReader(memStream))
{
//Read the data from memory in bytes
byte[] rawPacket = reader.ReadBytes(PacketSize());
//Convert the byte data to the structure
if (rawPacket != null)
{
packet = BytesToPacket(rawPacket);
}
}
}
catch (Exception ex)
{
//BIG ERROR, report it
System.Diagnostics.Debug.WriteLine("Error " + ex.Message);
}
}
