Tcl_CreateCloseHandler(3tcl)Tcl Library ProceduresTcl_CreateCloseHandler(3tcl)
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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_Delete-
CloseHandler does nothing if its proc and clientData arguments do not
match the proc and clientData for a close handler for channel.
SEE ALSO
close(3tcl), Tcl_Close(3tcl), Tcl_UnregisterChannel(3tcl)
KEYWORDS
callback, channel closing
Tcl 7.5 Tcl_CreateCloseHandler(3tcl)
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