93 lines
2.1 KiB
C#
93 lines
2.1 KiB
C#
using System;
|
|
using System.Collections.Generic;
|
|
using System.Linq;
|
|
using System.Text;
|
|
using System.Threading.Tasks;
|
|
using System.ComponentModel;
|
|
using System.IO;
|
|
using System.IO.MemoryMappedFiles;
|
|
|
|
using Essgee.EventArguments;
|
|
|
|
namespace Essgee.Emulation.ExtDevices.Nintendo
|
|
{
|
|
[Description("Game Boy (Link Cable)")]
|
|
//todo Unity [ElementPriority(1)]
|
|
public class GameBoyIPC : ISerialDevice
|
|
{
|
|
// TODO: ensure correct mmf/accessor disposal?
|
|
|
|
const string ipcName = "EssgeeGBLink";
|
|
const int ipcLength = 16;
|
|
|
|
const int ipcBaseOffsetSerialData = 0;
|
|
//
|
|
|
|
public event EventHandler<SaveExtraDataEventArgs> SaveExtraData;
|
|
protected virtual void OnSaveExtraData(SaveExtraDataEventArgs e) { SaveExtraData?.Invoke(this, e); }
|
|
|
|
MemoryMappedFile mmf;
|
|
MemoryMappedViewAccessor accessor;
|
|
|
|
bool ipcConnectionExists;
|
|
int ipcOffsetSelf, ipcOffsetRemote;
|
|
|
|
public GameBoyIPC()
|
|
{
|
|
mmf = null;
|
|
accessor = null;
|
|
|
|
ipcConnectionExists = false;
|
|
ipcOffsetSelf = ipcOffsetRemote = 0;
|
|
}
|
|
|
|
public void Initialize()
|
|
{
|
|
//
|
|
}
|
|
|
|
public void Shutdown()
|
|
{
|
|
if (ipcConnectionExists)
|
|
{
|
|
accessor.Flush();
|
|
accessor.Dispose();
|
|
mmf.Dispose();
|
|
|
|
ipcConnectionExists = false;
|
|
}
|
|
}
|
|
|
|
private void EstablishIPCConnection()
|
|
{
|
|
if (ipcConnectionExists) return;
|
|
|
|
try
|
|
{
|
|
// Try to open existing mapped file; if it exists, assume other instance is first machine
|
|
mmf = MemoryMappedFile.OpenExisting(ipcName);
|
|
ipcOffsetSelf = ipcBaseOffsetSerialData + 1;
|
|
ipcOffsetRemote = ipcBaseOffsetSerialData + 0;
|
|
}
|
|
catch (FileNotFoundException)
|
|
{
|
|
// Mapped file does not yet exist, create file and assume this instance is first machine
|
|
mmf = MemoryMappedFile.CreateOrOpen(ipcName, ipcLength);
|
|
ipcOffsetSelf = ipcBaseOffsetSerialData + 0;
|
|
ipcOffsetRemote = ipcBaseOffsetSerialData + 1;
|
|
}
|
|
accessor = mmf.CreateViewAccessor(0, ipcLength, MemoryMappedFileAccess.ReadWrite);
|
|
|
|
ipcConnectionExists = true;
|
|
}
|
|
|
|
public byte ExchangeBit(int left, byte data)
|
|
{
|
|
if (!ipcConnectionExists) EstablishIPCConnection();
|
|
|
|
accessor.Write(ipcOffsetSelf, data);
|
|
return accessor.ReadByte(ipcOffsetRemote);
|
|
}
|
|
}
|
|
}
|