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Tcl_CallWhenDeleted(3)                     Tcl Library Procedures                     Tcl_CallWhenDeleted(3)



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NAME
       Tcl_CallWhenDeleted, Tcl_DontCallWhenDeleted - Arrange for callback when interpreter is deleted

SYNOPSIS
       #include <tcl.h>

       Tcl_CallWhenDeleted(interp, proc, clientData)

       Tcl_DontCallWhenDeleted(interp, proc, clientData)

ARGUMENTS
       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.
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DESCRIPTION
       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
       type Tcl_InterpDeleteProc:
              typedef void Tcl_InterpDeleteProc(
                      ClientData clientData,
                      Tcl_Interp *interp);
       The clientData and interp parameters are copies of the  clientData  and  interp  arguments  given  to
       Tcl_CallWhenDeleted.   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 deleted.  If there is no deletion callback that
       matches interp, proc, and clientData then the call to Tcl_DontCallWhenDeleted has no effect.


KEYWORDS
       callback, delete, interpreter



Tcl                                                  7.0                              Tcl_CallWhenDeleted(3)