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{
This file is part of the Free Pascal run time library.
Copyright (c) 1998 by Michael Van Canneyt
Win part of pipe stream.
See the file COPYING.FPC, included in this distribution,
for details about the copyright.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
**********************************************************************}
uses windows;
Const piInheritablePipe : TSecurityAttributes = (
nlength:SizeOF(TSecurityAttributes);
lpSecurityDescriptor:Nil;
Binherithandle:True);
piNonInheritablePipe : TSecurityAttributes = (
nlength:SizeOF(TSecurityAttributes);
lpSecurityDescriptor:Nil;
Binherithandle:False);
PipeBufSize = 1024;
Function CreatePipeHandles (Var Inhandle,OutHandle : THandle) : Boolean;
begin
Result := CreatePipe (@Inhandle,@OutHandle,@piNonInheritablePipe,PipeBufSize);
end;
Function TInputPipeStream.GetNumBytesAvailable: DWord;
begin
if not PeekNamedPipe(Handle, nil, 0, nil, @Result, nil) then
Result := 0;
end;
function TInputPipeStream.GetPosition: Int64;
begin
Result:=FPos;
end;
procedure TInputPipeStream.InvalidSeek;
begin
Raise EPipeSeek.Create (ENoSeekMsg);
end;
procedure PipeClose (const FHandle: THandle); inline;
begin
FileClose(FHandle);
end;
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