294 lines
9.9 KiB
C
294 lines
9.9 KiB
C
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express oqr
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is Mozilla Communicator client code, released
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* March 31, 1998.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the
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* terms of the GNU Public License (the "GPL"), in which case the
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* provisions of the GPL are applicable instead of those above.
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* If you wish to allow use of your version of this file only
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* under the terms of the GPL and not to allow others to use your
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* version of this file under the NPL, indicate your decision by
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* deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL. If you do not delete
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* the provisions above, a recipient may use your version of this
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* file under either the NPL or the GPL.
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*/
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#ifndef jsatom_h___
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#define jsatom_h___
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/*
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* JS atom table.
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*/
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#include <stddef.h>
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#include "jstypes.h"
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#include "jshash.h" /* Added by JSIFY */
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#include "jsapi.h"
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#include "jsprvtd.h"
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#include "jspubtd.h"
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#ifdef JS_THREADSAFE
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#include "jslock.h"
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#endif
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JS_BEGIN_EXTERN_C
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#define ATOM_NOCOPY 0x01 /* don't copy atom string bytes */
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#define ATOM_TMPSTR 0x02 /* internal, to avoid extra string */
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#define ATOM_MARK 0x04 /* atom is reachable via GC */
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#define ATOM_PINNED 0x08 /* atom is pinned against GC */
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struct JSAtom {
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JSHashEntry entry; /* key is jsval, value keyword info */
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uint8 flags; /* flags, PINNED and/or MARK for now */
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int8 kwindex; /* keyword index, -1 if not keyword */
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jsatomid number; /* atom serial number and hash code */
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};
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#define ATOM_KEY(atom) ((jsval)(atom)->entry.key)
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#define ATOM_IS_OBJECT(atom) JSVAL_IS_OBJECT(ATOM_KEY(atom))
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#define ATOM_TO_OBJECT(atom) JSVAL_TO_OBJECT(ATOM_KEY(atom))
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#define ATOM_IS_INT(atom) JSVAL_IS_INT(ATOM_KEY(atom))
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#define ATOM_TO_INT(atom) JSVAL_TO_INT(ATOM_KEY(atom))
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#define ATOM_IS_DOUBLE(atom) JSVAL_IS_DOUBLE(ATOM_KEY(atom))
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#define ATOM_TO_DOUBLE(atom) JSVAL_TO_DOUBLE(ATOM_KEY(atom))
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#define ATOM_IS_STRING(atom) JSVAL_IS_STRING(ATOM_KEY(atom))
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#define ATOM_TO_STRING(atom) JSVAL_TO_STRING(ATOM_KEY(atom))
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#define ATOM_IS_BOOLEAN(atom) JSVAL_IS_BOOLEAN(ATOM_KEY(atom))
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#define ATOM_TO_BOOLEAN(atom) JSVAL_TO_BOOLEAN(ATOM_KEY(atom))
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#define ATOM_BYTES(atom) JS_GetStringBytes(ATOM_TO_STRING(atom))
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struct JSAtomListElement {
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JSAtomListElement *next;
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jsatomid index; /* index in script-specific atom map */
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JSAtom *atom;
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};
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struct JSAtomList {
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JSAtomListElement *list; /* literals indexed for mapping */
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jsuint count; /* count of indexed literals */
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};
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#define ATOM_LIST_INIT(al) ((al)->list = NULL, (al)->count = 0)
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#define ATOM_LIST_SEARCH(_ale,_al,_atom) \
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JS_BEGIN_MACRO \
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JSAtomListElement **_alep = &(_al)->list; \
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while ((_ale = *_alep) != NULL) { \
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if (_ale->atom == (_atom)) { \
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/* Hit, move atom's element to the front of the list. */ \
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*_alep = _ale->next; \
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_ale->next = (_al)->list; \
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(_al)->list = _ale; \
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break; \
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} \
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_alep = &_ale->next; \
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} \
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JS_END_MACRO
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struct JSAtomMap {
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JSAtom **vector; /* array of ptrs to indexed atoms */
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jsatomid length; /* count of (to-be-)indexed atoms */
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};
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struct JSAtomState {
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JSRuntime *runtime; /* runtime that owns us */
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JSHashTable *table; /* hash table containing all atoms */
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jsatomid number; /* one beyond greatest atom number */
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/* Type names and value literals. */
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JSAtom *typeAtoms[JSTYPE_LIMIT];
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JSAtom *booleanAtoms[2];
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JSAtom *nullAtom;
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/* Various built-in or commonly-used atoms. */
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JSAtom *ArrayAtom;
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JSAtom *MathAtom;
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JSAtom *NaNAtom;
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JSAtom *ObjectAtom;
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JSAtom *anonymousAtom;
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JSAtom *argumentsAtom;
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JSAtom *arityAtom;
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JSAtom *calleeAtom;
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JSAtom *callerAtom;
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JSAtom *classPrototypeAtom;
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JSAtom *constructorAtom;
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JSAtom *countAtom;
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JSAtom *getterAtom;
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JSAtom *indexAtom;
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JSAtom *inputAtom;
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JSAtom *lengthAtom;
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JSAtom *nameAtom;
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JSAtom *parentAtom;
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JSAtom *protoAtom;
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JSAtom *setterAtom;
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JSAtom *toSourceAtom;
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JSAtom *toStringAtom;
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JSAtom *valueOfAtom;
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JSAtom *evalAtom;
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#ifdef JS_THREADSAFE
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JSThinLock lock;
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volatile uint32 tablegen;
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#endif
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};
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/* Well-known predefined strings and their atoms. */
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extern char *js_type_str[];
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extern char *js_boolean_str[];
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extern char js_Array_str[];
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extern char js_Math_str[];
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extern char js_NaN_str[];
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extern char js_Object_str[];
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extern char js_anonymous_str[];
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extern char js_arguments_str[];
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extern char js_arity_str[];
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extern char js_callee_str[];
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extern char js_caller_str[];
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extern char js_class_prototype_str[];
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extern char js_constructor_str[];
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extern char js_count_str[];
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extern char js_eval_str[];
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extern char js_getter_str[];
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extern char js_index_str[];
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extern char js_input_str[];
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extern char js_length_str[];
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extern char js_name_str[];
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extern char js_parent_str[];
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extern char js_proto_str[];
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extern char js_setter_str[];
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extern char js_toSource_str[];
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extern char js_toString_str[];
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extern char js_valueOf_str[];
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/*
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* Initialize atom state. Return true on success, false with an out of
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* memory error report on failure.
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*/
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extern JSBool
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js_InitAtomState(JSContext *cx, JSAtomState *state);
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/*
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* Free and clear atom state.
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*/
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extern void
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js_FreeAtomState(JSContext *cx, JSAtomState *state);
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/*
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* Atom garbage collection hooks.
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*/
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typedef void
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(*JSGCThingMarker)(JSRuntime *rt, void *thing);
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extern void
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js_MarkAtomState(JSAtomState *state, JSGCThingMarker mark);
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extern void
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js_SweepAtomState(JSAtomState *state);
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extern void
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js_UnpinPinnedAtoms(JSAtomState *state);
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/*
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* Find or create the atom for an object. If we create a new atom, give it the
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* type indicated in flags. Return 0 on failure to allocate memory.
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*/
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extern JSAtom *
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js_AtomizeObject(JSContext *cx, JSObject *obj, uintN flags);
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/*
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* Find or create the atom for a Boolean value. If we create a new atom, give
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* it the type indicated in flags. Return 0 on failure to allocate memory.
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*/
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extern JSAtom *
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js_AtomizeBoolean(JSContext *cx, JSBool b, uintN flags);
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/*
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* Find or create the atom for an integer value. If we create a new atom, give
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* it the type indicated in flags. Return 0 on failure to allocate memory.
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*/
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extern JSAtom *
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js_AtomizeInt(JSContext *cx, jsint i, uintN flags);
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/*
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* Find or create the atom for a double value. If we create a new atom, give
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* it the type indicated in flags. Return 0 on failure to allocate memory.
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*/
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extern JSAtom *
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js_AtomizeDouble(JSContext *cx, jsdouble d, uintN flags);
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/*
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* Find or create the atom for a string. If we create a new atom, give it the
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* type indicated in flags. Return 0 on failure to allocate memory.
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*/
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extern JSAtom *
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js_AtomizeString(JSContext *cx, JSString *str, uintN flags);
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extern JS_FRIEND_API(JSAtom *)
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js_Atomize(JSContext *cx, const char *bytes, size_t length, uintN flags);
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extern JS_FRIEND_API(JSAtom *)
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js_AtomizeChars(JSContext *cx, const jschar *chars, size_t length, uintN flags);
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/*
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* This variant handles all value tag types.
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*/
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extern JSAtom *
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js_AtomizeValue(JSContext *cx, jsval value, uintN flags);
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/*
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* Convert v to an atomized string.
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*/
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extern JSAtom *
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js_ValueToStringAtom(JSContext *cx, jsval v);
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/*
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* Assign atom an index and insert it on al.
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*/
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extern JSAtomListElement *
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js_IndexAtom(JSContext *cx, JSAtom *atom, JSAtomList *al);
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/*
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* Get the atom with index i from map.
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*/
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extern JS_FRIEND_API(JSAtom *)
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js_GetAtom(JSContext *cx, JSAtomMap *map, jsatomid i);
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/*
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* For all unmapped atoms recorded in al, add a mapping from the atom's index
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* to its address. The GC must not run until all indexed atoms in atomLists
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* have been mapped by scripts connected to live objects (Function and Script
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* class objects have scripts as/in their private data -- the GC knows about
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* these two classes).
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*/
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extern JS_FRIEND_API(JSBool)
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js_InitAtomMap(JSContext *cx, JSAtomMap *map, JSAtomList *al);
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/*
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* Free map->vector and clear map.
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*/
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extern JS_FRIEND_API(void)
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js_FreeAtomMap(JSContext *cx, JSAtomMap *map);
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JS_END_EXTERN_C
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#endif /* jsatom_h___ */
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