Tcl_CreateCloseHandler(3) Tcl (7.5) Tcl_CreateCloseHandler(3)
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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.
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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
Page 1 (printed 2/19/99)
Tcl_CreateCloseHandler(3) Tcl (7.5) Tcl_CreateCloseHandler(3)close(n), Tcl_Close(3), Tcl_UnregisterChannel(3)
KEYWORDS
callback, channel closing
Page 2 (printed 2/19/99)
