/*************************************************** NAME : RemoveAllDeffunctions DESCRIPTION : Removes all deffunctions INPUTS : None RETURNS : TRUE if all deffunctions removed, FALSE otherwise SIDE EFFECTS : Deffunctions removed NOTES : None ***************************************************/ static intBool RemoveAllDeffunctions( void *theEnv, EXEC_STATUS) { DEFFUNCTION *dptr,*dtmp; unsigned oldbusy; intBool success = TRUE; #if BLOAD || BLOAD_AND_BSAVE if (Bloaded(theEnv,execStatus) == TRUE) return(FALSE); #endif dptr = (DEFFUNCTION *) EnvGetNextDeffunction(theEnv,execStatus,NULL); while (dptr != NULL) { if (dptr->executing > 0) { DeffunctionDeleteError(theEnv,execStatus,EnvGetDeffunctionName(theEnv,execStatus,(void *) dptr)); success = FALSE; } else { oldbusy = dptr->busy; ExpressionDeinstall(theEnv,execStatus,dptr->code); dptr->busy = oldbusy; ReturnPackedExpression(theEnv,execStatus,dptr->code); dptr->code = NULL; } dptr = (DEFFUNCTION *) EnvGetNextDeffunction(theEnv,execStatus,(void *) dptr); } dptr = (DEFFUNCTION *) EnvGetNextDeffunction(theEnv,execStatus,NULL); while (dptr != NULL) { dtmp = dptr; dptr = (DEFFUNCTION *) EnvGetNextDeffunction(theEnv,execStatus,(void *) dptr); if (dtmp->executing == 0) { if (dtmp->busy > 0) { PrintWarningID(theEnv,execStatus,"DFFNXFUN",1,FALSE); EnvPrintRouter(theEnv,execStatus,WWARNING,"Deffunction "); EnvPrintRouter(theEnv,execStatus,WWARNING,EnvGetDeffunctionName(theEnv,execStatus,(void *) dtmp)); EnvPrintRouter(theEnv,execStatus,WWARNING," only partially deleted due to usage by other constructs.\n"); SetDeffunctionPPForm((void *) dtmp,NULL); success = FALSE; } else { RemoveConstructFromModule(theEnv,execStatus,(struct constructHeader *) dtmp); RemoveDeffunction(theEnv,execStatus,dtmp); } } } return(success); }
/*************************************************** NAME : RemoveDeffunction DESCRIPTION : Removes a deffunction INPUTS : Deffunction pointer RETURNS : Nothing useful SIDE EFFECTS : Deffunction deallocated NOTES : Assumes deffunction is not in use!! ***************************************************/ globle void RemoveDeffunction( void *theEnv, void *vdptr) { DEFFUNCTION *dptr = (DEFFUNCTION *) vdptr; if (dptr == NULL) return; DecrementSymbolCount(theEnv,GetDeffunctionNamePointer((void *) dptr)); ExpressionDeinstall(theEnv,dptr->code); ReturnPackedExpression(theEnv,dptr->code); SetDeffunctionPPForm((void *) dptr,NULL); ClearUserDataList(theEnv,dptr->header.usrData); rtn_struct(theEnv,deffunctionStruct,dptr); }
/**************************************************** NAME : AddDeffunction DESCRIPTION : Adds a deffunction to the list of deffunctions INPUTS : 1) The symbolic name 2) The action expressions 3) The minimum number of arguments 4) The maximum number of arguments (can be -1) 5) The number of local variables 6) A flag indicating if this is a header call so that the deffunction can be recursively called RETURNS : The new deffunction (NULL on errors) SIDE EFFECTS : Deffunction structures allocated NOTES : Assumes deffunction is not executing ****************************************************/ static DEFFUNCTION *AddDeffunction( void *theEnv, SYMBOL_HN *name, EXPRESSION *actions, int min, int max, int lvars, int headerp) { DEFFUNCTION *dfuncPtr; unsigned oldbusy; #if DEBUGGING_FUNCTIONS unsigned DFHadWatch = FALSE; #endif /*===============================================================*/ /* If the deffunction doesn't exist, create a new structure to */ /* contain it and add it to the List of deffunctions. Otherwise, */ /* use the existing structure and remove the pretty print form */ /* and interpretive code. */ /*===============================================================*/ dfuncPtr = (DEFFUNCTION *) EnvFindDeffunction(theEnv,ValueToString(name)); if (dfuncPtr == NULL) { dfuncPtr = get_struct(theEnv,deffunctionStruct); InitializeConstructHeader(theEnv,"deffunction",(struct constructHeader *) dfuncPtr,name); IncrementSymbolCount(name); dfuncPtr->code = NULL; dfuncPtr->minNumberOfParameters = min; dfuncPtr->maxNumberOfParameters = max; dfuncPtr->numberOfLocalVars = lvars; dfuncPtr->busy = 0; dfuncPtr->executing = 0; } else { #if DEBUGGING_FUNCTIONS DFHadWatch = EnvGetDeffunctionWatch(theEnv,(void *) dfuncPtr); #endif dfuncPtr->minNumberOfParameters = min; dfuncPtr->maxNumberOfParameters = max; dfuncPtr->numberOfLocalVars = lvars; oldbusy = dfuncPtr->busy; ExpressionDeinstall(theEnv,dfuncPtr->code); dfuncPtr->busy = oldbusy; ReturnPackedExpression(theEnv,dfuncPtr->code); dfuncPtr->code = NULL; SetDeffunctionPPForm((void *) dfuncPtr,NULL); /* ======================================= Remove the deffunction from the list so that it can be added at the end ======================================= */ RemoveConstructFromModule(theEnv,(struct constructHeader *) dfuncPtr); } AddConstructToModule((struct constructHeader *) dfuncPtr); /* ================================== Install the new interpretive code. ================================== */ if (actions != NULL) { /* =============================== If a deffunction is recursive, do not increment its busy count based on self-references =============================== */ oldbusy = dfuncPtr->busy; ExpressionInstall(theEnv,actions); dfuncPtr->busy = oldbusy; dfuncPtr->code = actions; } /* =============================================================== Install the pretty print form if memory is not being conserved. =============================================================== */ #if DEBUGGING_FUNCTIONS EnvSetDeffunctionWatch(theEnv,DFHadWatch ? TRUE : DeffunctionData(theEnv)->WatchDeffunctions,(void *) dfuncPtr); if ((EnvGetConserveMemory(theEnv) == FALSE) && (headerp == FALSE)) SetDeffunctionPPForm((void *) dfuncPtr,CopyPPBuffer(theEnv)); #endif return(dfuncPtr); }