Tcl_CallWhenDeleted, Tcl_DontCallWhenDeleted — Arrange for callback when interpreter is deleted
Tcl_CallWhenDeleted(interp, proc, clientData)
Tcl_DontCallWhenDeleted(interp, proc, clientData)
Tcl_CallWhenDeleted arranges for proc to be called by
Tcl_DeleteInterp if/when interp is deleted at some future
time. Proc will be invoked just before the interpreter
is deleted, but the interpreter will still be valid at the
time of the call.
Proc should have arguments and result that match the
- Tcl_Interp *interp (in)
Interpreter with which to associated callback.
- Tcl_InterpDeleteProc *proc (in)
Procedure to call when interp is deleted.
- ClientData clientData (in)
Arbitrary one-word value to pass to proc.
typedef void Tcl_InterpDeleteProc(
The clientData and interp parameters are
copies of the clientData and interp arguments given
Typically, clientData points to an application-specific
data structure that proc uses to perform cleanup when an
interpreter is about to go away.
Proc does not return a value.
Tcl_DontCallWhenDeleted cancels a previous call to
Tcl_CallWhenDeleted with the same arguments, so that
proc will not be called after all when interp is
If there is no deletion callback that matches interp,
proc, and clientData then the call to
Tcl_DontCallWhenDeleted has no effect.
Note that if the callback is being used to delete a resource that must
be released on exit, Tcl_CreateExitHandler should be used to ensure that
a callback is received even if the application terminates without deleting the interpreter.
callback, cleanup, delete, interpreter
Copyright © 1993 The Regents of the University of California.
Copyright © 1994-1996 Sun Microsystems, Inc.