ossp-pkg/js/src/jsatom.h
1.2
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Communicator client code, released
* March 31, 1998.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef jsatom_h___
#define jsatom_h___
/*
* JS atom table.
*/
#include <stddef.h>
#include "jstypes.h"
#include "jshash.h" /* Added by JSIFY */
#include "jsapi.h"
#include "jsprvtd.h"
#include "jspubtd.h"
#ifdef JS_THREADSAFE
#include "jslock.h"
#endif
JS_BEGIN_EXTERN_C
#define ATOM_PINNED 0x01 /* atom is pinned against GC */
#define ATOM_INTERNED 0x02 /* pinned variant for JS_Intern* API */
#define ATOM_MARK 0x04 /* atom is reachable via GC */
#define ATOM_HIDDEN 0x08 /* atom is in special hidden subspace */
#define ATOM_NOCOPY 0x40 /* don't copy atom string bytes */
#define ATOM_TMPSTR 0x80 /* internal, to avoid extra string */
struct JSAtom {
JSHashEntry entry; /* key is jsval, value keyword info or
unhidden atom if ATOM_HIDDEN */
uint32 flags; /* pinned, interned, and mark flags */
jsatomid number; /* atom serial number and hash code */
};
#define ATOM_KEY(atom) ((jsval)(atom)->entry.key)
#define ATOM_IS_OBJECT(atom) JSVAL_IS_OBJECT(ATOM_KEY(atom))
#define ATOM_TO_OBJECT(atom) JSVAL_TO_OBJECT(ATOM_KEY(atom))
#define ATOM_IS_INT(atom) JSVAL_IS_INT(ATOM_KEY(atom))
#define ATOM_TO_INT(atom) JSVAL_TO_INT(ATOM_KEY(atom))
#define ATOM_IS_DOUBLE(atom) JSVAL_IS_DOUBLE(ATOM_KEY(atom))
#define ATOM_TO_DOUBLE(atom) JSVAL_TO_DOUBLE(ATOM_KEY(atom))
#define ATOM_IS_STRING(atom) JSVAL_IS_STRING(ATOM_KEY(atom))
#define ATOM_TO_STRING(atom) JSVAL_TO_STRING(ATOM_KEY(atom))
#define ATOM_IS_BOOLEAN(atom) JSVAL_IS_BOOLEAN(ATOM_KEY(atom))
#define ATOM_TO_BOOLEAN(atom) JSVAL_TO_BOOLEAN(ATOM_KEY(atom))
/*
* Return a printable, lossless char[] representation of a string-type atom.
* The lifetime of the result extends at least until the next GC activation,
* longer if cx's string newborn root is not overwritten.
*/
extern JS_FRIEND_API(const char *)
js_AtomToPrintableString(JSContext *cx, JSAtom *atom);
#define ATOM_KEYWORD(atom) ((struct keyword *)(atom)->entry.value)
#define ATOM_SET_KEYWORD(atom,kw) ((atom)->entry.value = (kw))
struct JSAtomListElement {
JSHashEntry entry;
};
#define ALE_ATOM(ale) ((JSAtom *) (ale)->entry.key)
#define ALE_INDEX(ale) ((jsatomid) JS_PTR_TO_UINT32((ale)->entry.value))
#define ALE_JSOP(ale) ((JSOp) (ale)->entry.value)
#define ALE_VALUE(ale) ((jsval) (ale)->entry.value)
#define ALE_NEXT(ale) ((JSAtomListElement *) (ale)->entry.next)
#define ALE_SET_ATOM(ale,atom) ((ale)->entry.key = (const void *)(atom))
#define ALE_SET_INDEX(ale,index)((ale)->entry.value = JS_UINT32_TO_PTR(index))
#define ALE_SET_JSOP(ale,op) ((ale)->entry.value = JS_UINT32_TO_PTR(op))
#define ALE_SET_VALUE(ale,val) ((ale)->entry.value = (JSHashEntry *)(val))
#define ALE_SET_NEXT(ale,link) ((ale)->entry.next = (JSHashEntry *)(link))
struct JSAtomList {
JSAtomListElement *list; /* literals indexed for mapping */
JSHashTable *table; /* hash table if list gets too long */
jsuint count; /* count of indexed literals */
};
#define ATOM_LIST_INIT(al) ((al)->list = NULL, (al)->table = NULL, \
(al)->count = 0)
#define ATOM_LIST_SEARCH(_ale,_al,_atom) \
JS_BEGIN_MACRO \
JSHashEntry **_hep; \
ATOM_LIST_LOOKUP(_ale, _hep, _al, _atom); \
JS_END_MACRO
#define ATOM_LIST_LOOKUP(_ale,_hep,_al,_atom) \
JS_BEGIN_MACRO \
if ((_al)->table) { \
_hep = JS_HashTableRawLookup((_al)->table, _atom->number, _atom); \
_ale = *_hep ? (JSAtomListElement *) *_hep : NULL; \
} else { \
JSAtomListElement **_alep = &(_al)->list; \
_hep = NULL; \
while ((_ale = *_alep) != NULL) { \
if (ALE_ATOM(_ale) == (_atom)) { \
/* Hit, move atom's element to the front of the list. */ \
*_alep = ALE_NEXT(_ale); \
ALE_SET_NEXT(_ale, (_al)->list); \
(_al)->list = _ale; \
break; \
} \
_alep = (JSAtomListElement **)&_ale->entry.next; \
} \
} \
JS_END_MACRO
struct JSAtomMap {
JSAtom **vector; /* array of ptrs to indexed atoms */
jsatomid length; /* count of (to-be-)indexed atoms */
};
struct JSAtomState {
JSRuntime *runtime; /* runtime that owns us */
JSHashTable *table; /* hash table containing all atoms */
jsatomid number; /* one beyond greatest atom number */
jsatomid liveAtoms; /* number of live atoms after last GC */
/* The rt->emptyString atom, see jsstr.c's js_InitRuntimeStringState. */
JSAtom *emptyAtom;
/* Type names and value literals. */
JSAtom *typeAtoms[JSTYPE_LIMIT];
JSAtom *booleanAtoms[2];
JSAtom *nullAtom;
/* Various built-in or commonly-used atoms, pinned on first context. */
JSAtom *ArgumentsAtom;
JSAtom *ArrayAtom;
JSAtom *BooleanAtom;
JSAtom *CallAtom;
JSAtom *DateAtom;
JSAtom *ErrorAtom;
JSAtom *FunctionAtom;
JSAtom *MathAtom;
JSAtom *NamespaceAtom;
JSAtom *NumberAtom;
JSAtom *ObjectAtom;
JSAtom *QNameAtom;
JSAtom *RegExpAtom;
JSAtom *ScriptAtom;
JSAtom *StringAtom;
JSAtom *XMLAtom;
JSAtom *FileAtom;
JSAtom *anonymousAtom;
JSAtom *argumentsAtom;
JSAtom *arityAtom;
JSAtom *calleeAtom;
JSAtom *callerAtom;
JSAtom *classPrototypeAtom;
JSAtom *constructorAtom;
JSAtom *countAtom;
JSAtom *eachAtom;
JSAtom *etagoAtom;
JSAtom *evalAtom;
JSAtom *getAtom;
JSAtom *getterAtom;
JSAtom *indexAtom;
JSAtom *inputAtom;
JSAtom *lengthAtom;
JSAtom *nameAtom;
JSAtom *namespaceAtom;
JSAtom *noSuchMethodAtom;
JSAtom *parentAtom;
JSAtom *protoAtom;
JSAtom *ptagcAtom;
JSAtom *qualifierAtom;
JSAtom *setAtom;
JSAtom *setterAtom;
JSAtom *spaceAtom;
JSAtom *stagoAtom;
JSAtom *starAtom;
JSAtom *starQualifierAtom;
JSAtom *tagcAtom;
JSAtom *toLocaleStringAtom;
JSAtom *toSourceAtom;
JSAtom *toStringAtom;
JSAtom *valueOfAtom;
JSAtom *xmlAtom;
#ifdef OSSP
JSAtom *DSOAtom;
#endif
/* Less frequently used atoms, pinned lazily by JS_ResolveStandardClass. */
struct {
JSAtom *AnyNameAtom;
JSAtom *AttributeNameAtom;
JSAtom *EvalErrorAtom;
JSAtom *InfinityAtom;
JSAtom *InternalErrorAtom;
JSAtom *NaNAtom;
JSAtom *RangeErrorAtom;
JSAtom *ReferenceErrorAtom;
JSAtom *SyntaxErrorAtom;
JSAtom *TypeErrorAtom;
JSAtom *URIErrorAtom;
JSAtom *XMLListAtom;
JSAtom *decodeURIAtom;
JSAtom *decodeURIComponentAtom;
JSAtom *defineGetterAtom;
JSAtom *defineSetterAtom;
JSAtom *encodeURIAtom;
JSAtom *encodeURIComponentAtom;
JSAtom *escapeAtom;
JSAtom *functionNamespaceURIAtom;
JSAtom *hasOwnPropertyAtom;
JSAtom *isFiniteAtom;
JSAtom *isNaNAtom;
JSAtom *isPrototypeOfAtom;
JSAtom *isXMLNameAtom;
JSAtom *lookupGetterAtom;
JSAtom *lookupSetterAtom;
JSAtom *parseFloatAtom;
JSAtom *parseIntAtom;
JSAtom *propertyIsEnumerableAtom;
JSAtom *unescapeAtom;
JSAtom *unevalAtom;
JSAtom *unwatchAtom;
JSAtom *watchAtom;
} lazy;
#ifdef JS_THREADSAFE
JSThinLock lock;
volatile uint32 tablegen;
#endif
#ifdef NARCISSUS
JSAtom *callAtom;
JSAtom *constructAtom;
JSAtom *hasInstanceAtom;
JSAtom *ExecutionContextAtom;
JSAtom *currentAtom;
#endif
};
/* Well-known predefined strings and their atoms. */
extern const char *js_type_str[];
extern const char *js_boolean_str[];
extern const char js_Arguments_str[];
extern const char js_Array_str[];
extern const char js_Boolean_str[];
extern const char js_Call_str[];
extern const char js_Date_str[];
extern const char js_Function_str[];
extern const char js_Math_str[];
extern const char js_Namespace_str[];
extern const char js_Number_str[];
extern const char js_Object_str[];
extern const char js_QName_str[];
extern const char js_RegExp_str[];
extern const char js_Script_str[];
extern const char js_String_str[];
extern const char js_XML_str[];
extern const char js_File_str[];
extern const char js_anonymous_str[];
extern const char js_arguments_str[];
extern const char js_arity_str[];
extern const char js_callee_str[];
extern const char js_caller_str[];
extern const char js_class_prototype_str[];
extern const char js_constructor_str[];
extern const char js_count_str[];
extern const char js_etago_str[];
extern const char js_each_str[];
extern const char js_eval_str[];
extern const char js_getter_str[];
extern const char js_get_str[];
extern const char js_index_str[];
extern const char js_input_str[];
extern const char js_length_str[];
extern const char js_name_str[];
extern const char js_namespace_str[];
extern const char js_noSuchMethod_str[];
extern const char js_object_str[];
extern const char js_parent_str[];
extern const char js_private_str[];
extern const char js_proto_str[];
extern const char js_ptagc_str[];
extern const char js_qualifier_str[];
extern const char js_setter_str[];
extern const char js_set_str[];
extern const char js_space_str[];
extern const char js_stago_str[];
extern const char js_star_str[];
extern const char js_starQualifier_str[];
extern const char js_tagc_str[];
extern const char js_toSource_str[];
extern const char js_toString_str[];
extern const char js_toLocaleString_str[];
extern const char js_valueOf_str[];
extern const char js_xml_str[];
#ifdef NARCISSUS
extern const char js_call_str[];
extern const char js_construct_str[];
extern const char js_hasInstance_str[];
extern const char js_ExecutionContext_str[];
extern const char js_current_str[];
#endif
/*
* Initialize atom state. Return true on success, false with an out of
* memory error report on failure.
*/
extern JSBool
js_InitAtomState(JSContext *cx, JSAtomState *state);
/*
* Free and clear atom state (except for any interned string atoms).
*/
extern void
js_FreeAtomState(JSContext *cx, JSAtomState *state);
/*
* Interned strings are atoms that live until state's runtime is destroyed.
* This function frees all interned string atoms, and then frees and clears
* state's members (just as js_FreeAtomState does), unless there aren't any
* interned strings in state -- in which case state must be "free" already.
*
* NB: js_FreeAtomState is called for each "last" context being destroyed in
* a runtime, where there may yet be another context created in the runtime;
* whereas js_FinishAtomState is called from JS_DestroyRuntime, when we know
* that no more contexts will be created. Thus we minimize garbage during
* context-free episodes on a runtime, while preserving atoms created by the
* JS_Intern*String APIs for the life of the runtime.
*/
extern void
js_FinishAtomState(JSAtomState *state);
/*
* Atom garbage collection hooks.
*/
typedef void
(*JSGCThingMarker)(void *thing, void *data);
extern void
js_MarkAtomState(JSAtomState *state, uintN gcflags, JSGCThingMarker mark,
void *data);
extern void
js_SweepAtomState(JSAtomState *state);
extern JSBool
js_InitPinnedAtoms(JSContext *cx, JSAtomState *state);
extern void
js_UnpinPinnedAtoms(JSAtomState *state);
/*
* Find or create the atom for an object. If we create a new atom, give it the
* type indicated in flags. Return 0 on failure to allocate memory.
*/
extern JSAtom *
js_AtomizeObject(JSContext *cx, JSObject *obj, uintN flags);
/*
* Find or create the atom for a Boolean value. If we create a new atom, give
* it the type indicated in flags. Return 0 on failure to allocate memory.
*/
extern JSAtom *
js_AtomizeBoolean(JSContext *cx, JSBool b, uintN flags);
/*
* Find or create the atom for an integer value. If we create a new atom, give
* it the type indicated in flags. Return 0 on failure to allocate memory.
*/
extern JSAtom *
js_AtomizeInt(JSContext *cx, jsint i, uintN flags);
/*
* Find or create the atom for a double value. If we create a new atom, give
* it the type indicated in flags. Return 0 on failure to allocate memory.
*/
extern JSAtom *
js_AtomizeDouble(JSContext *cx, jsdouble d, uintN flags);
/*
* Find or create the atom for a string. If we create a new atom, give it the
* type indicated in flags. Return 0 on failure to allocate memory.
*/
extern JSAtom *
js_AtomizeString(JSContext *cx, JSString *str, uintN flags);
extern JS_FRIEND_API(JSAtom *)
js_Atomize(JSContext *cx, const char *bytes, size_t length, uintN flags);
extern JS_FRIEND_API(JSAtom *)
js_AtomizeChars(JSContext *cx, const jschar *chars, size_t length, uintN flags);
/*
* This variant handles all value tag types.
*/
extern JSAtom *
js_AtomizeValue(JSContext *cx, jsval value, uintN flags);
/*
* Convert v to an atomized string.
*/
extern JSAtom *
js_ValueToStringAtom(JSContext *cx, jsval v);
/*
* Assign atom an index and insert it on al.
*/
extern JSAtomListElement *
js_IndexAtom(JSContext *cx, JSAtom *atom, JSAtomList *al);
/*
* Get the atom with index i from map.
*/
extern JS_FRIEND_API(JSAtom *)
js_GetAtom(JSContext *cx, JSAtomMap *map, jsatomid i);
/*
* For all unmapped atoms recorded in al, add a mapping from the atom's index
* to its address. The GC must not run until all indexed atoms in atomLists
* have been mapped by scripts connected to live objects (Function and Script
* class objects have scripts as/in their private data -- the GC knows about
* these two classes).
*/
extern JS_FRIEND_API(JSBool)
js_InitAtomMap(JSContext *cx, JSAtomMap *map, JSAtomList *al);
/*
* Free map->vector and clear map.
*/
extern JS_FRIEND_API(void)
js_FreeAtomMap(JSContext *cx, JSAtomMap *map);
JS_END_EXTERN_C
#endif /* jsatom_h___ */
