Ejemplo n.º 1
0
void
isc_symtab_destroy(isc_symtab_t **symtabp) {
	isc_symtab_t *symtab;
	unsigned int i;
	elt_t *elt, *nelt;

	REQUIRE(symtabp != NULL);
	symtab = *symtabp;
	REQUIRE(VALID_SYMTAB(symtab));

	for (i = 0; i < symtab->size; i++) {
		for (elt = HEAD(symtab->table[i]); elt != NULL; elt = nelt) {
			nelt = NEXT(elt, link);
			if (symtab->undefine_action != NULL)
			       (symtab->undefine_action)(elt->key,
							 elt->type,
							 elt->value,
							 symtab->undefine_arg);
			isc_mem_put(symtab->mctx, elt, sizeof(*elt));
		}
	}
	isc_mem_put(symtab->mctx, symtab->table,
		    symtab->size * sizeof(eltlist_t));
	symtab->magic = 0;
	isc_mem_put(symtab->mctx, symtab, sizeof(*symtab));

	*symtabp = NULL;
}
Ejemplo n.º 2
0
isc_result_t
isc_symtab_define(isc_symtab_t *symtab, const char *key, unsigned int type,
		  isc_symvalue_t value, isc_symexists_t exists_policy)
{
	unsigned int bucket;
	elt_t *elt;

	REQUIRE(VALID_SYMTAB(symtab));
	REQUIRE(key != NULL);
	REQUIRE(type != 0);

	FIND(symtab, key, type, bucket, elt);

	if (exists_policy != isc_symexists_add && elt != NULL) {
		if (exists_policy == isc_symexists_reject)
			return (ISC_R_EXISTS);
		INSIST(exists_policy == isc_symexists_replace);
		UNLINK(symtab->table[bucket], elt, link);
		if (symtab->undefine_action != NULL)
			(symtab->undefine_action)(elt->key, elt->type,
						  elt->value,
						  symtab->undefine_arg);
	} else {
		elt = (elt_t *)isc_mem_get(symtab->mctx, sizeof(*elt));
		if (elt == NULL)
			return (ISC_R_NOMEMORY);
		ISC_LINK_INIT(elt, link);
		symtab->count++;
	}

	/*
	 * Though the "key" can be const coming in, it is not stored as const
	 * so that the calling program can easily have writable access to
	 * it in its undefine_action function.  In the event that it *was*
	 * truly const coming in and then the caller modified it anyway ...
	 * well, don't do that!
	 */
	DE_CONST(key, elt->key);
	elt->type = type;
	elt->value = value;

	/*
	 * We prepend so that the most recent definition will be found.
	 */
	PREPEND(symtab->table[bucket], elt, link);

	if (symtab->count > symtab->maxload)
		grow_table(symtab);

	return (ISC_R_SUCCESS);
}
Ejemplo n.º 3
0
isc_result_t
isc_symtab_lookup(isc_symtab_t *symtab, const char *key, unsigned int type,
		  isc_symvalue_t *value)
{
	unsigned int bucket;
	elt_t *elt;

	REQUIRE(VALID_SYMTAB(symtab));
	REQUIRE(key != NULL);

	FIND(symtab, key, type, bucket, elt);

	if (elt == NULL)
		return (ISC_R_NOTFOUND);

	if (value != NULL)
		*value = elt->value;

	return (ISC_R_SUCCESS);
}
Ejemplo n.º 4
0
isc_result_t
isc_symtab_undefine(isc_symtab_t *symtab, const char *key, unsigned int type) {
	unsigned int bucket;
	elt_t *elt;

	REQUIRE(VALID_SYMTAB(symtab));
	REQUIRE(key != NULL);

	FIND(symtab, key, type, bucket, elt);

	if (elt == NULL)
		return (ISC_R_NOTFOUND);

	if (symtab->undefine_action != NULL)
		(symtab->undefine_action)(elt->key, elt->type,
					  elt->value, symtab->undefine_arg);
	UNLINK(symtab->table[bucket], elt, link);
	isc_mem_put(symtab->mctx, elt, sizeof(*elt));

	return (ISC_R_SUCCESS);
}
Ejemplo n.º 5
0
unsigned int
isc_symtab_count(isc_symtab_t *symtab) {
	REQUIRE(VALID_SYMTAB(symtab));
	return (symtab->count);
}