Tcl_CreateCloseHandler
Tcl_CreateCloseHandler
NAMESYNOPSIS
ARGUMENTS
DESCRIPTION
SEE ALSO
KEYWORDS
___________________________
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
|
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. |
______________
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
close(n), Tcl_Close(3), Tcl_UnregisterChannel(3)
KEYWORDS
callback, channel closing
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