/// <summary>
/// Writes the specified buffer to the specified pipe.
/// </summary>
/// <param name="PipeId">The Id of the pipe to write to.</param>
/// <param name="Data">The buffer to write to the pipe.</param>
/// <param name="Offset">The offset in the buffer to start writing from.</param>
/// <param name="Length">The length of data to write from the buffer. (Clamped)</param>
/// <param name="Blocking">Whether the write call should be blocking or not.</param>
/// <remarks>
/// <para>
/// Id required since an outpoint can be connected to multiple pipes.
/// </para>
/// <para>
/// Non-blocking calls will still be deferred but will fail if the data cannot be written
/// on first pass through the pipe's R/W queue.
/// </para>
/// </remarks>
public void Write(int PipeId, byte[] Data, int Offset, int Length, bool Blocking)
{
Pipes.WritePipeRequest *WritePipeRequestPtr = (Pipes.WritePipeRequest *)Heap.AllocZeroed((uint)sizeof(Pipes.WritePipeRequest), "BasicOutPipe : Alloc WritePipeRequest");
try
{
if (WritePipeRequestPtr != null)
{
WritePipeRequestPtr->Offset = Offset;
WritePipeRequestPtr->PipeId = PipeId;
WritePipeRequestPtr->Length = FOS_System.Math.Min(Data.Length - Offset, Length);
WritePipeRequestPtr->InBuffer = (byte *)Utilities.ObjectUtilities.GetHandle(Data) + FOS_System.Array.FieldsBytesSize;
WritePipeRequestPtr->Blocking = Blocking;
SystemCallResults SysCallResult = SystemCalls.WritePipe(WritePipeRequestPtr);
switch (SysCallResult)
{
case SystemCallResults.Unhandled:
//BasicConsole.WriteLine("BasicOutPipe > WritePipe: Unhandled!");
ExceptionMethods.Throw(new Exceptions.RWUnhandledException("BasicOutPipe : Write Pipe unexpected unhandled!"));
break;
case SystemCallResults.Fail:
//BasicConsole.WriteLine("BasicOutPipe > WritePipe: Failed!");
if (Blocking)
{
ExceptionMethods.Throw(new Exceptions.RWFailedException("BasicOutPipe : Write Pipe unexpected failed! (Blocking call)"));
}
else
{
ExceptionMethods.Throw(new Exceptions.RWFailedException("BasicOutPipe : Write Pipe failed. (Non-blocking call)"));
}
break;
case SystemCallResults.OK:
//BasicConsole.WriteLine("BasicOutPipe > WritePipe: Succeeded.");
break;
default:
//BasicConsole.WriteLine("BasicOutPipe > WritePipe: Unexpected system call result!");
ExceptionMethods.Throw(new Exceptions.RWUnhandledException("BasicOutPipe : Write Pipe unexpected result!"));
break;
}
}
else
{
ExceptionMethods.Throw(new FOS_System.Exceptions.ArgumentException("BasicOutPipe : Couldn't allocate memory to write to pipe!"));
}
}
finally
{
if (WritePipeRequestPtr != null)
{
Heap.Free(WritePipeRequestPtr);
}
}
}
public static SystemCallResults WritePipe(Pipes.WritePipeRequest *Request)
{
uint Return1 = 0;
uint Return2 = 0;
uint Return3 = 0;
uint Return4 = 0;
Call(SystemCallNumbers.WritePipe, (uint)Request, 0, 0, ref Return1, ref Return2, ref Return3, ref Return4);
return((SystemCallResults)Return1);
}
public static unsafe SystemCallResults HandleDeferredSystemCall(
Process CallerProcess, Thread CallerThread,
SystemCallNumbers syscallNumber, uint Param1, uint Param2, uint Param3,
ref uint Return2, ref uint Return3, ref uint Return4)
{
SystemCallResults result = SystemCallResults.Unhandled;
switch (syscallNumber)
{
case SystemCallNumbers.StartThread:
//BasicConsole.WriteLine("DSC: Start Thread");
Return2 = CallerProcess.CreateThread((ThreadStartMethod)Utilities.ObjectUtilities.GetObject((void *)Param1), "[From sys call]").Id;
//BasicConsole.WriteLine("DSC: Start Thread - done.");
result = SystemCallResults.OK;
break;
case SystemCallNumbers.RegisterPipeOutpoint:
{
//BasicConsole.WriteLine("DSC: Register Pipe Outpoint");
Pipes.PipeOutpoint outpoint;
bool registered = Pipes.PipeManager.RegisterPipeOutpoint(CallerProcess.Id, (Pipes.PipeClasses)Param1, (Pipes.PipeSubclasses)Param2, (int)Param3, out outpoint);
if (registered)
{
result = SystemCallResults.OK;
}
else
{
result = SystemCallResults.Fail;
}
//BasicConsole.WriteLine("DSC: Register Pipe Outpoint - done.");
}
break;
case SystemCallNumbers.GetNumPipeOutpoints:
{
//BasicConsole.WriteLine("DSC: Get Num Pipe Outpoints");
int numOutpoints;
bool obtained = Pipes.PipeManager.GetNumPipeOutpoints((Pipes.PipeClasses)Param1, (Pipes.PipeSubclasses)Param2, out numOutpoints);
if (obtained)
{
result = SystemCallResults.OK;
Return2 = (uint)numOutpoints;
}
else
{
result = SystemCallResults.Fail;
}
//BasicConsole.WriteLine("DSC: Get Num Pipe Outpoints - done");
}
break;
case SystemCallNumbers.GetPipeOutpoints:
{
//BasicConsole.WriteLine("DSC: Get Pipe Outpoints");
bool obtained = Pipes.PipeManager.GetPipeOutpoints(CallerProcess, (Pipes.PipeClasses)Param1, (Pipes.PipeSubclasses)Param2, (Pipes.PipeOutpointsRequest *)Param3);
if (obtained)
{
result = SystemCallResults.OK;
}
else
{
result = SystemCallResults.Fail;
}
//BasicConsole.WriteLine("DSC: Get Pipe Outpoints - done");
}
break;
case SystemCallNumbers.CreatePipe:
{
//BasicConsole.WriteLine("DSC: Create Pipe");
bool created = Pipes.PipeManager.CreatePipe(CallerProcess.Id, Param1, (Pipes.CreatePipeRequest *)Param2);
if (created)
{
result = SystemCallResults.OK;
}
else
{
result = SystemCallResults.Fail;
}
//BasicConsole.WriteLine("DSC: Create Pipe - done");
}
break;
case SystemCallNumbers.WaitOnPipeCreate:
{
//BasicConsole.WriteLine("DSC: Wait On Pipe Create");
bool waiting = Pipes.PipeManager.WaitOnPipeCreate(CallerProcess.Id, CallerThread.Id, (Pipes.PipeClasses)Param1, (Pipes.PipeSubclasses)Param2);
if (waiting)
{
result = SystemCallResults.Deferred;
}
else
{
result = SystemCallResults.Fail;
}
//BasicConsole.WriteLine("DSC: Wait On Pipe Create - done");
}
break;
case SystemCallNumbers.ReadPipe:
{
//BasicConsole.WriteLine("DSC: Read Pipe");
// Need access to calling process' memory to be able to set values in request structure(s)
MemoryLayout OriginalMemoryLayout = SystemCallsHelpers.EnableAccessToMemoryOfProcess(CallerProcess);
Pipes.ReadPipeRequest * RequestPtr = (Pipes.ReadPipeRequest *)Param1;
Pipes.PipeManager.RWResults RWResult = Pipes.PipeManager.ReadPipe(RequestPtr->PipeId, RequestPtr->Blocking, CallerProcess, CallerThread);
if (RWResult == Pipes.PipeManager.RWResults.Error)
{
result = SystemCallResults.Fail;
}
else
{
// Returning Deferred state from here will leave the caller thread
// in whatever state ReadPipe decided it should be in.
result = SystemCallResults.Deferred;
}
SystemCallsHelpers.DisableAccessToMemoryOfProcess(OriginalMemoryLayout);
//BasicConsole.WriteLine("DSC: Read Pipe - done");
}
break;
case SystemCallNumbers.WritePipe:
{
//BasicConsole.WriteLine("DSC: Write Pipe");
// Need access to calling process' memory to be able to set values in request structure(s)
MemoryLayout OriginalMemoryLayout = SystemCallsHelpers.EnableAccessToMemoryOfProcess(CallerProcess);
Pipes.WritePipeRequest * RequestPtr = (Pipes.WritePipeRequest *)Param1;
Pipes.PipeManager.RWResults RWResult = Pipes.PipeManager.WritePipe(RequestPtr->PipeId, RequestPtr->Blocking, CallerProcess, CallerThread);
if (RWResult == Pipes.PipeManager.RWResults.Error)
{
result = SystemCallResults.Fail;
}
else
{
// Returning Deferred state from here will leave the caller thread
// in whatever state WritePipe decided it should be in.
result = SystemCallResults.Deferred;
}
SystemCallsHelpers.DisableAccessToMemoryOfProcess(OriginalMemoryLayout);
//BasicConsole.WriteLine("DSC: Write Pipe - done");
}
break;
default:
BasicConsole.WriteLine("DSC: Unrecognised call number.");
BasicConsole.WriteLine((uint)syscallNumber);
break;
}
return(result);
}
