private void readGameData()
{
try
{
// Note: if it is critical for client minimize wait time, same strategy as plugin uses can be employed.
// Pass 0 timeout and skip update if someone holds the lock.
if (this.fileAccessMutex.WaitOne(5000))
{
try
{
bool buf1Current = false;
// Try buffer 1:
using (var sharedMemoryStreamView = this.memoryMappedFile1.CreateViewStream())
{
var sharedMemoryStream = new BinaryReader(sharedMemoryStreamView);
this.sharedMemoryReadBuffer = sharedMemoryStream.ReadBytes(this.SHARED_MEMORY_HEADER_SIZE_BYTES);
// Marhsal header
var headerHandle = GCHandle.Alloc(this.sharedMemoryReadBuffer, GCHandleType.Pinned);
var header = (rF2StateHeader)Marshal.PtrToStructure(headerHandle.AddrOfPinnedObject(), typeof(rF2StateHeader));
headerHandle.Free();
if (header.mCurrentRead == 1)
{
sharedMemoryStream.BaseStream.Position = 0;
this.sharedMemoryReadBuffer = sharedMemoryStream.ReadBytes(this.SHARED_MEMORY_SIZE_BYTES);
buf1Current = true;
}
}
// Read buffer 2
if (!buf1Current)
{
using (var sharedMemoryStreamView = this.memoryMappedFile2.CreateViewStream())
{
var sharedMemoryStream = new BinaryReader(sharedMemoryStreamView);
this.sharedMemoryReadBuffer = sharedMemoryStream.ReadBytes(this.SHARED_MEMORY_SIZE_BYTES);
}
}
}
finally
{
this.fileAccessMutex.ReleaseMutex();
}
// Marshal rF2State
var handle = GCHandle.Alloc(this.sharedMemoryReadBuffer, GCHandleType.Pinned);
this.currrF2State = (rF2State)Marshal.PtrToStructure(handle.AddrOfPinnedObject(), typeof(rF2State));
this.carData = currrF2State.mVehicles[0];
this.wheel = currrF2State.mWheels[0];
handle.Free();
}
}
catch (Exception)
{
disconnect();
}
}
private rF2VehScoringInfo getVehicleInfo(rF2State shared)
{
for (int i = 0; i < shared.mNumVehicles; ++i)
{
var vehicle = shared.mVehicles[i];
if (vehicle.mIsPlayer == 1)
{
return(vehicle);
}
}
throw new Exception("no vehicle for player!");
}
public override Object ReadGameData(Boolean forSpotter)
{
lock (this)
{
var rF2StateMarshalled = new rF2State();
if (!initialised)
{
if (!this.InitialiseInternal())
{
throw new GameDataReadException("Failed to initialise shared memory");
}
}
try
{
if (this.fileAccessMutex.WaitOne(5000))
{
try
{
bool buf1Current = false;
// Try buffer 1:
using (var sharedMemoryStreamView = this.memoryMappedFile1.CreateViewStream())
{
var sharedMemoryStream = new BinaryReader(sharedMemoryStreamView);
this.sharedMemoryReadBuffer = sharedMemoryStream.ReadBytes(this.SHARED_MEMORY_HEADER_SIZE_BYTES);
// Marhsal header
var headerHandle = GCHandle.Alloc(this.sharedMemoryReadBuffer, GCHandleType.Pinned);
var header = (rF2StateHeader)Marshal.PtrToStructure(headerHandle.AddrOfPinnedObject(), typeof(rF2StateHeader));
headerHandle.Free();
if (header.mCurrentRead == 1)
{
sharedMemoryStream.BaseStream.Position = 0;
this.sharedMemoryReadBuffer = sharedMemoryStream.ReadBytes(this.SHARED_MEMORY_SIZE_BYTES);
buf1Current = true;
}
}
// Read buffer 2
if (!buf1Current)
{
using (var sharedMemoryStreamView = this.memoryMappedFile2.CreateViewStream())
{
var sharedMemoryStream = new BinaryReader(sharedMemoryStreamView);
this.sharedMemoryReadBuffer = sharedMemoryStream.ReadBytes(this.SHARED_MEMORY_SIZE_BYTES);
}
}
}
finally
{
this.fileAccessMutex.ReleaseMutex();
}
// Marshal rF2State
var handle = GCHandle.Alloc(this.sharedMemoryReadBuffer, GCHandleType.Pinned);
rF2StateMarshalled = (rF2State)Marshal.PtrToStructure(handle.AddrOfPinnedObject(), typeof(rF2State));
handle.Free();
RF2StructWrapper structWrapper = new RF2StructWrapper();
structWrapper.ticksWhenRead = DateTime.Now.Ticks;
structWrapper.state = rF2StateMarshalled;
if (!forSpotter && dumpToFile && this.dataToDump != null)
{
this.dataToDump.Add(structWrapper);
}
return(structWrapper);
}
else
{
Console.WriteLine("Timed out waiting on rFactor 2 Shared Memory mutex.");
return(null);
}
}
catch (Exception ex)
{
Console.WriteLine("rFactor 2 Shared Memory connection failed.");
this.Disconnect();
throw new GameDataReadException(ex.Message, ex);
}
}
}
