man CrtCloseHdlr () - arrange for callbacks when channels are closed
NAME
Tcl_CreateCloseHandler, Tcl_DeleteCloseHandler - arrange for callbacks when channels are closed
SYNOPSIS
#include <tcl.h> void Tcl_CreateCloseHandler(channel, proc, clientData) void Tcl_DeleteCloseHandler(channel, proc, clientData)
ARGUMENTS
The channel for which to create or delete a close callback. The procedure to call as the callback. Arbitrary one-word value to pass to proc.
DESCRIPTION
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.
SEE ALSO
KEYWORDS
callback, channel closing