public int Peek(IntPtr buffer, int length, out int bytesAvailable, out int bytesLeftInMessage)
{
using (MemoryAlloc data = new MemoryAlloc(FilePipePeekBuffer.DataOffset + length))
{
NtStatus status;
int returnLength;
status = this.FsControl(FsCtlPeek, IntPtr.Zero, 0, data, data.Size, out returnLength);
// If we got a buffer overflow it simply means we didn't
// read all of the available bytes.
if (status == NtStatus.BufferOverflow)
{
status = NtStatus.Success;
}
status.ThrowIf();
FilePipePeekBuffer info = data.ReadStruct <FilePipePeekBuffer>();
bytesAvailable = info.ReadDataAvailable;
int bytesRead = returnLength - FilePipePeekBuffer.DataOffset;
bytesLeftInMessage = info.MessageLength - bytesRead;
if (buffer != IntPtr.Zero)
{
data.ReadMemory(buffer, 0, FilePipePeekBuffer.DataOffset, bytesRead);
}
return(bytesRead);
}
}
public int Peek(IntPtr buffer, int length, out int bytesAvailable, out int bytesLeftInMessage)
{
using (var data = new MemoryAlloc(FilePipePeekBuffer.DataOffset + length))
{
NtStatus status;
int returnLength;
status = this.FsControl(FsCtlPeek, IntPtr.Zero, 0, data, data.Size, out returnLength);
// If we got a buffer overflow it simply means we didn't
// read all of the available bytes.
if (status == NtStatus.BufferOverflow)
status = NtStatus.Success;
if (status >= NtStatus.Error)
Win32.ThrowLastError(status);
FilePipePeekBuffer info = data.ReadStruct<FilePipePeekBuffer>();
int bytesRead;
bytesAvailable = info.ReadDataAvailable;
bytesRead = returnLength - FilePipePeekBuffer.DataOffset;
bytesLeftInMessage = info.MessageLength - bytesRead;
if (buffer != IntPtr.Zero)
data.ReadMemory(buffer, 0, FilePipePeekBuffer.DataOffset, bytesRead);
return bytesRead;
}
}
