diff options
Diffstat (limited to 'generic/tclBasic.c')
| -rw-r--r-- | generic/tclBasic.c | 286 |
1 files changed, 83 insertions, 203 deletions
diff --git a/generic/tclBasic.c b/generic/tclBasic.c index 4f70cee..d31777e 100644 --- a/generic/tclBasic.c +++ b/generic/tclBasic.c @@ -146,10 +146,7 @@ static Tcl_NRPostProc TEOV_Exception; static Tcl_NRPostProc TEOV_NotFoundCallback; static Tcl_NRPostProc TEOV_RestoreVarFrame; static Tcl_NRPostProc TEOV_RunLeaveTraces; -static Tcl_NRPostProc YieldToCallback; -static void ClearTailcall(Tcl_Interp *interp, - struct NRE_callback *tailcallPtr); static Tcl_ObjCmdProc NRCoroInjectObjCmd; MODULE_SCOPE const TclStubs tclStubs; @@ -3770,7 +3767,8 @@ TclNREvalObjv( int result; Namespace *lookupNsPtr = iPtr->lookupNsPtr; Command **cmdPtrPtr; - + NRE_callback *callbackPtr; + iPtr->lookupNsPtr = NULL; /* @@ -3783,15 +3781,14 @@ TclNREvalObjv( * finishes the source command and not just the target. */ - if (iPtr->evalFlags & TCL_EVAL_REDIRECT) { - TclNRAddCallback(interp, NRCommand, NULL, INT2PTR(1), INT2PTR(objc), objv); - iPtr->evalFlags &= ~TCL_EVAL_REDIRECT; + if (iPtr->deferredCallbacks) { + callbackPtr = iPtr->deferredCallbacks; + iPtr->deferredCallbacks = NULL; } else { - TclNRAddCallback(interp, NRCommand, NULL, NULL, INT2PTR(objc), objv); + TclNRAddCallback(interp, NRCommand, NULL, NULL, NULL, NULL); + callbackPtr = TOP_CB(interp); } - cmdPtrPtr = (Command **) &(TOP_CB(interp)->data[0]); - - TclNRSpliceDeferred(interp); + cmdPtrPtr = (Command **) &(callbackPtr->data[0]); iPtr->numLevels++; result = TclInterpReady(interp); @@ -3918,14 +3915,6 @@ TclNREvalObjv( } } -void -TclPushTailcallPoint( - Tcl_Interp *interp) -{ - TclNRAddCallback(interp, NRCommand, NULL, NULL, NULL, NULL); - ((Interp *) interp)->numLevels++; -} - int TclNRRunCallbacks( Tcl_Interp *interp, @@ -3962,6 +3951,14 @@ NRCommand( } ((Interp *)interp)->numLevels--; + /* + * If there is a tailcall, schedule it + */ + + if (data[1] && (data[1] != INT2PTR(1))) { + TclNRAddCallback(interp, TclNRTailcallEval, data[1], NULL, NULL, NULL); + } + /* OPT ?? * Do not interrupt a series of cleanups with async or limit checks: * just check at the end? @@ -4219,9 +4216,9 @@ TEOV_NotFound( savedNsPtr = varFramePtr->nsPtr; varFramePtr->nsPtr = lookupNsPtr; } - TclNRDeferCallback(interp, TEOV_NotFoundCallback, INT2PTR(handlerObjc), + TclSkipTailcall(interp); + TclNRAddCallback(interp, TEOV_NotFoundCallback, INT2PTR(handlerObjc), newObjv, savedNsPtr, NULL); - iPtr->evalFlags |= TCL_EVAL_REDIRECT; return TclNREvalObjv(interp, newObjc, newObjv, TCL_EVAL_NOERR, NULL); } @@ -5341,63 +5338,6 @@ TclArgumentGet( /* *---------------------------------------------------------------------- * - * Tcl_Eval -- - * - * Execute a Tcl command in a string. This function executes the script - * directly, rather than compiling it to bytecodes. Before the arrival of - * the bytecode compiler in Tcl 8.0 Tcl_Eval was the main function used - * for executing Tcl commands, but nowadays it isn't used much. - * - * Results: - * The return value is one of the return codes defined in tcl.h (such as - * TCL_OK), and interp's result contains a value to supplement the return - * code. The value of the result will persist only until the next call to - * Tcl_Eval or Tcl_EvalObj: you must copy it or lose it! - * - * Side effects: - * Can be almost arbitrary, depending on the commands in the script. - * - *---------------------------------------------------------------------- - */ - -int -Tcl_Eval( - Tcl_Interp *interp, /* Token for command interpreter (returned by - * previous call to Tcl_CreateInterp). */ - const char *script) /* Pointer to TCL command to execute. */ -{ - return Tcl_EvalEx(interp, script, -1, 0); -} - -/* - *---------------------------------------------------------------------- - * - * Tcl_EvalObj -- - * - * These functions are deprecated but we keep them around for backwards - * compatibility reasons. - * - * Results: - * See the functions they call. - * - * Side effects: - * See the functions they call. - * - *---------------------------------------------------------------------- - */ - -#undef Tcl_EvalObj -int -Tcl_EvalObj( - Tcl_Interp *interp, - Tcl_Obj *objPtr) -{ - return Tcl_EvalObjEx(interp, objPtr, 0); -} - -/* - *---------------------------------------------------------------------- - * * Tcl_EvalObjEx, TclEvalObjEx -- * * Execute Tcl commands stored in a Tcl object. These commands are @@ -5541,7 +5481,8 @@ TclNREvalObjEx( iPtr->cmdFramePtr = eoFramePtr; } - TclNRDeferCallback(interp, TEOEx_ListCallback, listPtr, eoFramePtr, + TclMarkTailcall(interp); + TclNRAddCallback(interp, TEOEx_ListCallback, listPtr, eoFramePtr, NULL, NULL); ListObjGetElements(listPtr, objc, objv); @@ -6261,72 +6202,10 @@ Tcl_AppendObjToErrorInfo( Tcl_Obj *objPtr) /* Message to record. */ { int length; + register Interp *iPtr = (Interp *) interp; const char *message = TclGetStringFromObj(objPtr, &length); Tcl_IncrRefCount(objPtr); - Tcl_AddObjErrorInfo(interp, message, length); - Tcl_DecrRefCount(objPtr); -} - -/* - *---------------------------------------------------------------------- - * - * Tcl_AddErrorInfo -- - * - * Add information to the errorInfo field that describes the current - * error. - * - * Results: - * None. - * - * Side effects: - * The contents of message are appended to the errorInfo field. If we are - * just starting to log an error, errorInfo is initialized from the error - * message in the interpreter's result. - * - *---------------------------------------------------------------------- - */ - -void -Tcl_AddErrorInfo( - Tcl_Interp *interp, /* Interpreter to which error information - * pertains. */ - const char *message) /* Message to record. */ -{ - Tcl_AddObjErrorInfo(interp, message, -1); -} - -/* - *---------------------------------------------------------------------- - * - * Tcl_AddObjErrorInfo -- - * - * Add information to the errorInfo field that describes the current - * error. This routine differs from Tcl_AddErrorInfo by taking a byte - * pointer and length. - * - * Results: - * None. - * - * Side effects: - * "length" bytes from "message" are appended to the errorInfo field. If - * "length" is negative, use bytes up to the first NULL byte. If we are - * just starting to log an error, errorInfo is initialized from the error - * message in the interpreter's result. - * - *---------------------------------------------------------------------- - */ - -void -Tcl_AddObjErrorInfo( - Tcl_Interp *interp, /* Interpreter to which error information - * pertains. */ - const char *message, /* Points to the first byte of an array of - * bytes of the message. */ - int length) /* The number of bytes in the message. If < 0, - * then append all bytes up to a NULL byte. */ -{ - register Interp *iPtr = (Interp *) interp; /* * If we are just starting to log an error, errorInfo is initialized from @@ -6354,6 +6233,7 @@ Tcl_AddObjErrorInfo( } Tcl_AppendToObj(iPtr->errorInfo, message, length); } + Tcl_DecrRefCount(objPtr); } /* @@ -7650,29 +7530,58 @@ Tcl_NRCmdSwap( */ void -TclSpliceTailcall( +TclMarkTailcall( + Tcl_Interp *interp) +{ + Interp *iPtr = (Interp *) interp; + + if (iPtr->deferredCallbacks == NULL) { + TclNRAddCallback(interp, NRCommand, NULL, NULL, + NULL, NULL); + iPtr->deferredCallbacks = TOP_CB(interp); + } +} + +void +TclSkipTailcall( + Tcl_Interp *interp) +{ + Interp *iPtr = (Interp *) interp; + + TclMarkTailcall(interp); + iPtr->deferredCallbacks->data[1] = INT2PTR(1); +} + +void +TclPushTailcallPoint( + Tcl_Interp *interp) +{ + TclNRAddCallback(interp, NRCommand, NULL, NULL, NULL, NULL); + ((Interp *) interp)->numLevels++; +} + +void +TclSetTailcall( Tcl_Interp *interp, - NRE_callback *tailcallPtr) + Tcl_Obj *listPtr) { /* * Find the splicing spot: right before the NRCommand of the thing - * being tailcalled. Note that we skip NRCommands marked in data[1] + * being tailcalled. Note that we skip NRCommands marked by a 1 in data[1] * (used by command redirectors). */ NRE_callback *runPtr; for (runPtr = TOP_CB(interp); runPtr; runPtr = runPtr->nextPtr) { - if (((runPtr->procPtr) == NRCommand) && !runPtr->data[1]) { + if (((runPtr->procPtr) == NRCommand) && !runPtr->data[1]) { break; } } if (!runPtr) { Tcl_Panic("tailcall cannot find the right splicing spot: should not happen!"); } - - tailcallPtr->nextPtr = runPtr->nextPtr; - runPtr->nextPtr = tailcallPtr; + runPtr->data[1] = listPtr; } int @@ -7702,7 +7611,7 @@ TclNRTailcallObjCmd( */ if (iPtr->varFramePtr->tailcallPtr) { - ClearTailcall(interp, iPtr->varFramePtr->tailcallPtr); + Tcl_DecrRefCount(iPtr->varFramePtr->tailcallPtr); iPtr->varFramePtr->tailcallPtr = NULL; } @@ -7717,23 +7626,20 @@ TclNRTailcallObjCmd( Tcl_Obj *listPtr, *nsObjPtr; Tcl_Namespace *nsPtr = (Tcl_Namespace *) iPtr->varFramePtr->nsPtr; Tcl_Namespace *ns1Ptr; - NRE_callback *tailcallPtr; - listPtr = Tcl_NewListObj(objc-1, objv+1); - Tcl_IncrRefCount(listPtr); + /* The tailcall data is in a Tcl list: the first element is the + * namespace, the rest the command to be tailcalled. */ + + listPtr = Tcl_NewListObj(objc, objv); nsObjPtr = Tcl_NewStringObj(nsPtr->fullName, -1); if ((TCL_OK != TclGetNamespaceFromObj(interp, nsObjPtr, &ns1Ptr)) || (nsPtr != ns1Ptr)) { Tcl_Panic("Tailcall failed to find the proper namespace"); } - Tcl_IncrRefCount(nsObjPtr); - - TclNRAddCallback(interp, TclNRTailcallEval, listPtr, nsObjPtr, - NULL, NULL); - tailcallPtr = TOP_CB(interp); - TOP_CB(interp) = tailcallPtr->nextPtr; - iPtr->varFramePtr->tailcallPtr = tailcallPtr; + TclListObjSetElement(interp, listPtr, 0, nsObjPtr); + + iPtr->varFramePtr->tailcallPtr = listPtr; } return TCL_RETURN; } @@ -7745,12 +7651,14 @@ TclNRTailcallEval( int result) { Interp *iPtr = (Interp *) interp; - Tcl_Obj *listPtr = data[0]; - Tcl_Obj *nsObjPtr = data[1]; + Tcl_Obj *listPtr = data[0], *nsObjPtr; Tcl_Namespace *nsPtr; int objc; Tcl_Obj **objv; + Tcl_ListObjGetElements(interp, listPtr, &objc, &objv); + nsObjPtr = objv[0]; + if (result == TCL_OK) { result = TclGetNamespaceFromObj(interp, nsObjPtr, &nsPtr); } @@ -7769,10 +7677,10 @@ TclNRTailcallEval( * Perform the tailcall */ - TclNRDeferCallback(interp, TailcallCleanup, listPtr, nsObjPtr, NULL,NULL); + TclMarkTailcall(interp); + TclNRAddCallback(interp, TailcallCleanup, listPtr, NULL, NULL,NULL); iPtr->lookupNsPtr = (Namespace *) nsPtr; - ListObjGetElements(listPtr, objc, objv); - return TclNREvalObjv(interp, objc, objv, 0, NULL); + return TclNREvalObjv(interp, objc-1, objv+1, 0, NULL); } static int @@ -7782,19 +7690,9 @@ TailcallCleanup( int result) { Tcl_DecrRefCount((Tcl_Obj *) data[0]); - Tcl_DecrRefCount((Tcl_Obj *) data[1]); return result; } -static void -ClearTailcall( - Tcl_Interp *interp, - NRE_callback *tailcallPtr) -{ - TailcallCleanup(tailcallPtr->data, interp, TCL_OK); - TCLNR_FREE(interp, tailcallPtr); -} - void Tcl_NRAddCallback( @@ -7896,50 +7794,32 @@ TclNRYieldToObjCmd( * This is essentially code from TclNRTailcallObjCmd */ - listPtr = Tcl_NewListObj(objc-1, objv+1); - Tcl_IncrRefCount(listPtr); + /* + * Add the tailcall in the caller env, then just yield. + * + * This is essentially code from TclNRTailcallObjCmd + */ + + listPtr = Tcl_NewListObj(objc, objv); nsObjPtr = Tcl_NewStringObj(nsPtr->fullName, -1); if ((TCL_OK != TclGetNamespaceFromObj(interp, nsObjPtr, &ns1Ptr)) || (nsPtr != ns1Ptr)) { Tcl_Panic("yieldto failed to find the proper namespace"); } - Tcl_IncrRefCount(nsObjPtr); + TclListObjSetElement(interp, listPtr, 0, nsObjPtr); + /* * Add the callback in the caller's env, then instruct TEBC to yield. */ iPtr->execEnvPtr = corPtr->callerEEPtr; - TclNRAddCallback(interp, YieldToCallback, corPtr, listPtr, nsObjPtr, - NULL); + TclSetTailcall(interp, listPtr); iPtr->execEnvPtr = corPtr->eePtr; return TclNRYieldObjCmd(INT2PTR(CORO_ACTIVATE_YIELDM), interp, 1, objv); } - -static int -YieldToCallback( - ClientData data[], - Tcl_Interp *interp, - int result) -{ - /* CoroutineData *corPtr = data[0];*/ - Tcl_Obj *listPtr = data[1]; - ClientData nsPtr = data[2]; - NRE_callback *cbPtr; - - /* - * yieldTo: invoke the command using tailcall tech. - */ - - TclNRAddCallback(interp, TclNRTailcallEval, listPtr, nsPtr, NULL, NULL); - cbPtr = TOP_CB(interp); - TOP_CB(interp) = cbPtr->nextPtr; - - TclSpliceTailcall(interp, cbPtr); - return TCL_OK; -} static int RewindCoroutineCallback( |