internal static int OpenAndReturnLinuxFd(int helperPid, ASCIIString fileName, int flag, int mode)
{
Globals.LinuxIPCBuffer.CopyFrom(0, fileName.GetByteString());
var fd = IPCStubs.Open(helperPid, flag, mode);
return(fd);
}
public int ReadImpl(ByteBufferRef buffer, int offset, int count, ref uint pos)
{
var max_length = buffer.Length - offset > count ? count : buffer.Length - offset;
if (max_length < 0)
{
pos = 0;
return(-ErrorCode.EINVAL);
}
int ret = IPCStubs.Read(helperPid, fd, new Pointer(buffer.Location + offset), count, ref pos);
return(ret);
}
public int ArchFStat64(Thread current, UserPtr buf)
{
var ret = IPCStubs.linux_sys_fstat64(current.Parent.helperPid, Fd);
if (ret < 0)
{
return(ret);
}
if (buf.Write(current, new Pointer(Globals.LinuxIPCBuffer.Location), GenericINode.SIZE_OF_STAT64) != 0)
{
return(-ErrorCode.EFAULT);
}
return(0);
}
internal static OpenFileCompletion OpenAndGetSizeAsync(Thread current, byte[] filename, int flags, int mode)
{
ArchDefinition.Assert(filename[filename.Length - 1] == 0);
var buf = Globals.AllocateAlignedCompletionBuffer(filename.Length);
if (!buf.isValid)
{
return(null);
}
buf.CopyFrom(0, filename);
var completion = new OpenFileCompletion(current, GenericINode.INodeKind.ArchINodeKind, buf, flags, mode);
IPCStubs.OpenAndGetSizeAsync(current.Parent.helperPid, current.impl._value.thread._value, new Pointer(completion.buf.Location), flags, mode);
return(completion);
}
internal int ftruncate(Thread current, int length)
{
if (length < 0)
{
return(-ErrorCode.EINVAL);
}
var ret = IPCStubs.Ftruncate(current.Parent.helperPid, Fd, length);
if (ret < 0)
{
return(ret);
}
ArchInodeSize = (uint)length;
return(0);
}
public static ArchINode Open(int helperPid, ASCIIString fileName, int flag, int mode, out ErrorCode ec)
{
var fd = OpenAndReturnLinuxFd(helperPid, fileName, flag, mode);
if (fd < 0)
{
ec.Code = -fd;
return(null);
}
var ret = IPCStubs.linux_sys_fstat64(helperPid, fd);
uint size = 0;
if (ret >= 0)
{
size = (uint)FileSystem.GetSizeFromStat64(Globals.LinuxIPCBuffer);
}
ec.Code = ErrorCode.NoError;
return(new ArchINode(fd, size, helperPid));
}
internal int ArchWrite(Thread current, ref ExceptionRegisters regs, ref ByteBufferRef buf, int len, uint pos, File file)
{
if (!Globals.CompletionQueueAllocator.Contains(buf))
{
Arch.Console.WriteLine("inode-write: unimplemented");
Arch.ArchDefinition.Panic();
}
var iocp = IOCompletion.CreateWriteIOCP(current, file, buf);
var r = IPCStubs.WriteAsync(current.Parent.helperPid, current.impl._value.thread._value, new Pointer(buf.Location), fd, len, pos);
if (r < 0)
{
iocp.Dispose();
return(r);
}
Globals.CompletionQueue.Enqueue(iocp);
current.SaveState(ref regs);
current.AsyncReturn = true;
// Take the buffer
buf = ByteBufferRef.Empty;
return(0);
}
internal int ArchRead(Thread current, ref ExceptionRegisters regs, UserPtr userBuf, int len, uint pos, File file)
{
var buf = Globals.AllocateAlignedCompletionBuffer(len);
if (!buf.isValid)
{
return(-ErrorCode.ENOMEM);
}
var iocp = IOCompletion.CreateReadIOCP(current, userBuf, len, file, buf);
var r = IPCStubs.ReadAsync(current.Parent.helperPid, current.impl._value.thread._value, new Pointer(buf.Location), fd, len, pos);
if (r < 0)
{
iocp.Dispose();
return(r);
}
Globals.CompletionQueue.Enqueue(iocp);
current.SaveState(ref regs);
current.AsyncReturn = true;
return(0);
}
public void Close()
{
IPCStubs.Close(helperPid, fd);
}