/// <summary>
/// Fs read entry
/// </summary>
/// <param name="node"></param>
/// <param name="offset"></param>
/// <param name="size"></param>
/// <param name="buffer"></param>
private static unsafe uint read(Node node, uint offset, uint size, byte[] buffer)
{
PacketFSCookie cookie = (PacketFSCookie)node.Cookie;
PacketFSEntry entry = GetEntryByName(cookie.PacketFSEntry);
if (entry == null)
{
return(0);
}
int pid = Tasking.CurrentTask.PID;
if (entry.ControlPID == pid)
{
PacketFSPacket packet = (PacketFSPacket)Util.VoidPtrToObject(entry.ControlQueue.Pop());
uint readSize = packet.Length;
if (readSize > size)
{
readSize = size;
}
Memory.Memcpy(Util.ObjectToVoidPtr(buffer), packet.buffer, (int)readSize);
Heap.Free(packet.buffer);
//Heap.Free(Util.ObjectToVoidPtr(packet));
return(readSize);
}
else
{
Queue queue = GetQueueByPID(entry, pid);
if (queue == null)
{
return(0);
}
PacketFSPacket packet = (PacketFSPacket)Util.VoidPtrToObject(queue.Pop());
uint readSize = packet.Length;
if (readSize > size)
{
readSize = size;
}
Memory.Memcpy(Util.ObjectToVoidPtr(buffer), packet.buffer, (int)readSize);
Heap.Free(packet.buffer);
//Heap.Free(Util.ObjectToVoidPtr(packet));
return(readSize);
}
}
/// <summary>
/// FS write entry
/// </summary>
/// <param name="node"></param>
/// <param name="offset"></param>
/// <param name="size"></param>
/// <param name="buffer"></param>
private static unsafe uint write(Node node, uint offset, uint size, byte[] buffer)
{
PacketFSCookie cookie = (PacketFSCookie)node.Cookie;
PacketFSEntry entry = GetEntryByName(cookie.PacketFSEntry);
if (entry == null)
{
return(0);
}
int pid = Tasking.CurrentTask.PID;
if (entry.ControlPID == pid)
{
if (size < 4)
{
return(0);
}
byte *buf = (byte *)Util.ObjectToVoidPtr(buffer);
byte *dataBuf = buf + 4;
int packetSize = (int)size - 4;
int targetPID = *(int *)buf;
Queue queue = GetQueueByPID(entry, pid);
// Queue for pid even exists?
if (queue == null)
{
return(0);
}
PacketFSPacket packet = new PacketFSPacket();
packet.buffer = (byte *)Heap.Alloc(packetSize);
packet.Length = (uint)packetSize;
Memory.Memcpy(packet.buffer, dataBuf, packetSize);
queue.Push(Util.ObjectToVoidPtr(packet));
return((uint)packetSize);
}
else
{
int totalSize = (int)size + 4;
byte *buf = (byte *)Heap.Alloc((int)size);
byte *dataBuf = buf + 4;
// Set PID
*(int *)buf = pid;
PacketFSPacket packet = new PacketFSPacket();
packet.buffer = (byte *)Heap.Alloc(totalSize);
packet.Length = (uint)totalSize;
entry.ControlQueue.Push(Util.ObjectToVoidPtr(packet));
return(size);
}
}