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Pipe with TCL/TK
- To: gnu-win32 at cygnus dot com
- Subject: Pipe with TCL/TK
- From: genesis at hermes9 dot cst dot cnes dot fr (Utilisateur genesis)
- Date: Tue, 31 Mar 1998 16:41:44 +0200
- Cc: genesis at hermes9 dot cst dot cnes dot fr
Hi,
I use TCK/TK with GNUWIN32-B19. My application use Tcl functions libraries to send Tcl and Tk commands.
I use pipe to interprocess communication, and I want to detect when a pipe may be read.
For that I created pipe with "pipe" function, and started a function handler "action_pipe" (for execute a callback when pipe may be read).
int fid[2];
Tcl_Channel pipe_channel;
#ifdef _WIN32
HANDLE pipe_handle;
#else
int pipe_fd;
#endif
pipe (fid);
#ifdef _WIN32
pipe_fd = get_osfhandle(fid[0]);
#else
pipe_fd = fid[0];
#endif
pipe_channel = Tcl_MakeFileChannel ( pipe_fd TCL_READABLE );
Tcl_CreateChannelHandler ( pipe_channel, TCL_READABLE,
action_pipe, (ClientData) fid[0] );
I've the same source code for SUN Solaris 2.5 and Windows NT GNUWIN32-B19. I've TCL/TK 8.0 on both platforms. I use -D_WIN32 compilation option on Windows.
I've no problem on SUN platform, the handler "action_pipe" is activate when a pipe may be read.
On Windows platform my application block when the TCl/TK event loop is started.
I post this message to this mailing list because I saw some CYGNUS comments in TCL source code of GNU-B19 about pipe creation in tclWinPipe.c.
I hope someone can help me to understand why in this example on WIN32 my application block.
Otherwise, I search on WIN32 platform an other solution to detect when a pipe may be read.
Thanks.
Jean-Luc CAMES.
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