XPipe

Description

Include file: xpipe.h

Parent class: XIO

Overview

XPipe is a class which provides data-communication between related processes. Therefore you redirect stdin/stdout/stderr to a pipes read- and/or write-handle(s) of the server and client process. The client must be a client-process (see OS/2-docs for details).
To do realy client/server data-communication use DDE (class XDDE) or named pipes (XNamedPipeServer, XNamedPipeClient).

Example:



  ULONG hfSave, hfNew = XPIPE_STDERROR;

  //save stderror-handle
  XPipe::DuplicateHandle( XPIPE_STDERROR, hfSave);

  //create a pipe and open it
  XPipe pipe;
  pipe.Open();

  //set the write-handle from the pipe as stderror so the client will write to it
  XPipe::DuplicateHandle( pipe1.GetWriteHandle(), hfNew);

  //start the client-process here
  XProcess::ExecuteProg(.......);

  //close write-handle of the pipe
  XPipe::CloseHandle( pipe.GetWriteHandle());

  //bring the saved handde from stderror back
  XPipe::DuplicateHandle( hfSave, hfNew);

  //close stderror
  XPipe::CloseHandle(hfSave);

  ULONG cbRead;
  char buffer[XPIPE_DEFAULTSIZE];

  do
  {
  //read data like a file
  cbRead = pipe.Read( achBuf, XPIPE_DEFAULTSIZE);
  } while(cbRead);

  //close the pipe
  pipe.Close();