diff options
Diffstat (limited to 'generic/tclLiteral.c')
| -rw-r--r-- | generic/tclLiteral.c | 140 |
1 files changed, 52 insertions, 88 deletions
diff --git a/generic/tclLiteral.c b/generic/tclLiteral.c index b991ef3..441ea91 100644 --- a/generic/tclLiteral.c +++ b/generic/tclLiteral.c @@ -12,8 +12,6 @@ * * See the file "license.terms" for information on usage and redistribution of * this file, and for a DISCLAIMER OF ALL WARRANTIES. - * - * RCS: @(#) $Id: tclLiteral.c,v 1.43 2010/04/29 23:39:32 msofer Exp $ */ #include "tclInt.h" @@ -77,78 +75,6 @@ TclInitLiteralTable( /* *---------------------------------------------------------------------- * - * TclCleanupLiteralTable -- - * - * This function frees the internal representation of every literal in a - * literal table. It is called prior to deleting an interp, so that - * variable refs will be cleaned up properly. - * - * Results: - * None. - * - * Side effects: - * Each literal in the table has its internal representation freed. - * - *---------------------------------------------------------------------- - */ - -void -TclCleanupLiteralTable( - Tcl_Interp *interp, /* Interpreter containing literals to purge */ - LiteralTable *tablePtr) /* Points to the literal table being - * cleaned. */ -{ - int i; - LiteralEntry *entryPtr; /* Pointer to the current entry in the hash - * table of literals. */ - LiteralEntry *nextPtr; /* Pointer to the next entry in the bucket. */ - Tcl_Obj *objPtr; /* Pointer to a literal object whose internal - * rep is being freed. */ - const Tcl_ObjType *typePtr; /* Pointer to the object's type. */ - int didOne; /* Flag for whether we've removed a literal in - * the current bucket. */ - -#ifdef TCL_COMPILE_DEBUG - TclVerifyGlobalLiteralTable((Interp *) interp); -#endif /* TCL_COMPILE_DEBUG */ - - for (i=0 ; i<tablePtr->numBuckets ; i++) { - /* - * It is tempting simply to walk each hash bucket once and delete the - * internal representations of each literal in turn. It's also wrong. - * The problem is that freeing a literal's internal representation can - * delete other literals to which it refers, making nextPtr invalid. - * So each time we free an internal rep, we start its bucket over - * again. - */ - - do { - didOne = 0; - entryPtr = tablePtr->buckets[i]; - while (entryPtr != NULL) { - objPtr = entryPtr->objPtr; - nextPtr = entryPtr->nextPtr; - typePtr = objPtr->typePtr; - if ((typePtr != NULL) && (typePtr->freeIntRepProc != NULL)) { - if (objPtr->bytes == NULL) { - Tcl_Panic("%s: literal without a string rep", - "TclCleanupLiteralTable"); - } - objPtr->typePtr = NULL; - typePtr->freeIntRepProc(objPtr); - didOne = 1; - break; - } else { - entryPtr = nextPtr; - } - } - } while (didOne); - } -} - -/* - *---------------------------------------------------------------------- - * * TclDeleteLiteralTable -- * * This function frees up everything associated with a literal table @@ -201,7 +127,7 @@ TclDeleteLiteralTable( objPtr = entryPtr->objPtr; TclDecrRefCount(objPtr); nextPtr = entryPtr->nextPtr; - ckfree((char *) entryPtr); + ckfree(entryPtr); entryPtr = nextPtr; } } @@ -211,7 +137,7 @@ TclDeleteLiteralTable( */ if (tablePtr->buckets != tablePtr->staticBuckets) { - ckfree((char *) tablePtr->buckets); + ckfree(tablePtr->buckets); } } @@ -285,7 +211,7 @@ TclCreateLiteral( *globalPtrPtr = globalPtr; } if (flags & LITERAL_ON_HEAP) { - ckfree((char *) bytes); + ckfree(bytes); } globalPtr->refCount++; return objPtr; @@ -293,7 +219,7 @@ TclCreateLiteral( } if (!newPtr) { if (flags & LITERAL_ON_HEAP) { - ckfree((char *) bytes); + ckfree(bytes); } return NULL; } @@ -319,7 +245,7 @@ TclCreateLiteral( } #endif - globalPtr = (LiteralEntry *) ckalloc((unsigned) sizeof(LiteralEntry)); + globalPtr = ckalloc(sizeof(LiteralEntry)); globalPtr->objPtr = objPtr; globalPtr->refCount = 1; globalPtr->nsPtr = nsPtr; @@ -441,7 +367,7 @@ TclRegisterLiteral( || ((objPtr->bytes[0] == bytes[0]) && (memcmp(objPtr->bytes, bytes, (unsigned) length) == 0)))) { if (flags & LITERAL_ON_HEAP) { - ckfree((char *) bytes); + ckfree(bytes); } objIndex = (localPtr - envPtr->literalArrayPtr); #ifdef TCL_COMPILE_DEBUG @@ -759,15 +685,14 @@ ExpandLocalLiteralArray( int i; if (envPtr->mallocedLiteralArray) { - newArrayPtr = (LiteralEntry *) - ckrealloc((char *)currArrayPtr, 2 * currBytes); + newArrayPtr = ckrealloc(currArrayPtr, 2 * currBytes); } else { /* * envPtr->literalArrayPtr isn't a ckalloc'd pointer, so we must * code a ckrealloc equivalent for ourselves. */ - newArrayPtr = (LiteralEntry *) ckalloc(2 * currBytes); + newArrayPtr = ckalloc(2 * currBytes); memcpy(newArrayPtr, currArrayPtr, currBytes); envPtr->mallocedLiteralArray = 1; } @@ -856,7 +781,7 @@ TclReleaseLiteral( } else { prevPtr->nextPtr = entryPtr->nextPtr; } - ckfree((char *) entryPtr); + ckfree(entryPtr); globalTablePtr->numEntries--; TclDecrRefCount(objPtr); @@ -978,8 +903,7 @@ RebuildLiteralTable( */ tablePtr->numBuckets *= 4; - tablePtr->buckets = (LiteralEntry **) ckalloc((unsigned) - (tablePtr->numBuckets * sizeof(LiteralEntry *))); + tablePtr->buckets = ckalloc(tablePtr->numBuckets * sizeof(LiteralEntry*)); for (count=tablePtr->numBuckets, newChainPtr=tablePtr->buckets; count>0 ; count--, newChainPtr++) { *newChainPtr = NULL; @@ -1008,7 +932,47 @@ RebuildLiteralTable( */ if (oldBuckets != tablePtr->staticBuckets) { - ckfree((char *) oldBuckets); + ckfree(oldBuckets); + } +} + +/* + *---------------------------------------------------------------------- + * + * TclInvalidateCmdLiteral -- + * + * Invalidate a command literal entry, if present in the literal hash + * tables, by resetting its internal representation. This invalidation + * leaves it in the literal tables and in existing literal arrays. As a + * result, existing references continue to work but we force a fresh + * command look-up upon the next use (see, in particular, + * TclSetCmdNameObj()). + * + * Results: + * None. + * + * Side effects: + * Resets the internal representation of the CmdName Tcl_Obj + * using TclFreeIntRep(). + * + *---------------------------------------------------------------------- + */ + +void +TclInvalidateCmdLiteral( + Tcl_Interp *interp, /* Interpreter for which to invalidate a + * command literal. */ + const char *name, /* Points to the start of the cmd literal + * name. */ + Namespace *nsPtr) /* The namespace for which to lookup and + * invalidate a cmd literal. */ +{ + Interp *iPtr = (Interp *) interp; + Tcl_Obj *literalObjPtr = TclCreateLiteral(iPtr, (char *) name, + strlen(name), -1, NULL, nsPtr, 0, NULL); + + if (literalObjPtr != NULL && literalObjPtr->typePtr == &tclCmdNameType) { + TclFreeIntRep(literalObjPtr); } } @@ -1070,7 +1034,7 @@ TclLiteralStats( * Print out the histogram and a few other pieces of information. */ - result = (char *) ckalloc((unsigned) ((NUM_COUNTERS*60) + 300)); + result = ckalloc(NUM_COUNTERS*60 + 300); sprintf(result, "%d entries in table, %d buckets\n", tablePtr->numEntries, tablePtr->numBuckets); p = result + strlen(result); |