Tcl_CreateCloseHandler, Tcl_DeleteCloseHandler - arrange for callbacks when
channels are closed
#include <tcl.h>
void
Tcl_CreateCloseHandler(channel, proc, clientData)
void
Tcl_DeleteCloseHandler(channel, proc, clientData)
- Tcl_Channel channel (in)
- The channel for which to create or delete a close callback.
- Tcl_CloseProc *proc (in)
- The procedure to call as the callback.
- ClientData clientData (in)
- Arbitrary one-word value to pass to proc.
Tcl_CreateCloseHandler arranges for proc to be called when
channel is closed with Tcl_Close or
Tcl_UnregisterChannel, or using the Tcl close command.
Proc should match the following prototype:
typedef void Tcl_CloseProc(
ClientData clientData);
The clientData is the same as the value provided in the
call to Tcl_CreateCloseHandler.
Tcl_DeleteCloseHandler removes a close callback for
channel. The proc and clientData identify which close
callback to remove; Tcl_DeleteCloseHandler does nothing if its
proc and clientData arguments do not match the proc and
clientData for a close handler for channel.
close(n), Tcl_Close(3), Tcl_UnregisterChannel(3)
callback, channel closing