https://github.com/mozilla/gecko-dev
Tip revision: 5173df029664d710c8f38f63eea15781d77c1111 authored by seabld on 19 January 2012, 09:10:27 UTC
Added tag SEAMONKEY_2_7b4_RELEASE for changeset FIREFOX_10_0b5_BUILD1. CLOSED TREE a=release
Added tag SEAMONKEY_2_7b4_RELEASE for changeset FIREFOX_10_0b5_BUILD1. CLOSED TREE a=release
Tip revision: 5173df0
jsweakmap.cpp
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* vim: set ts=4 sw=4 et tw=99:
*
* ***** 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 SpiderMonkey JavaScript 1.9 code, released
* May 28, 2008.
*
* The Initial Developer of the Original Code is
* Mozilla Foundation
* Portions created by the Initial Developer are Copyright (C) 2009
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Andreas Gal <gal@mozilla.com>
*
* 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 ***** */
#include <string.h>
#include "jsapi.h"
#include "jscntxt.h"
#include "jsfriendapi.h"
#include "jsgc.h"
#include "jsobj.h"
#include "jsgc.h"
#include "jsgcmark.h"
#include "jsweakmap.h"
#include "vm/GlobalObject.h"
#include "jsgcinlines.h"
#include "jsobjinlines.h"
using namespace js;
namespace js {
bool
WeakMapBase::markAllIteratively(JSTracer *tracer)
{
bool markedAny = false;
JSRuntime *rt = tracer->context->runtime;
for (WeakMapBase *m = rt->gcWeakMapList; m; m = m->next) {
if (m->markIteratively(tracer))
markedAny = true;
}
return markedAny;
}
void
WeakMapBase::sweepAll(JSTracer *tracer)
{
JSRuntime *rt = tracer->context->runtime;
for (WeakMapBase *m = rt->gcWeakMapList; m; m = m->next)
m->sweep(tracer);
}
} /* namespace js */
typedef WeakMap<JSObject *, Value> ObjectValueMap;
static ObjectValueMap *
GetObjectMap(JSObject *obj)
{
JS_ASSERT(obj->isWeakMap());
return (ObjectValueMap *)obj->getPrivate();
}
static JSObject *
NonNullObject(JSContext *cx, Value *vp)
{
if (vp->isPrimitive()) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_NOT_NONNULL_OBJECT);
return NULL;
}
return &vp->toObject();
}
static JSBool
WeakMap_has(JSContext *cx, uintN argc, Value *vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
bool ok;
JSObject *obj = NonGenericMethodGuard(cx, args, WeakMap_has, &WeakMapClass, &ok);
if (!obj)
return ok;
if (args.length() < 1) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_MORE_ARGS_NEEDED,
"WeakMap.has", "0", "s");
return false;
}
JSObject *key = NonNullObject(cx, &args[0]);
if (!key)
return false;
ObjectValueMap *map = GetObjectMap(obj);
if (map) {
ObjectValueMap::Ptr ptr = map->lookup(key);
if (ptr) {
args.rval() = BooleanValue(true);
return true;
}
}
args.rval() = BooleanValue(false);
return true;
}
static JSBool
WeakMap_get(JSContext *cx, uintN argc, Value *vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
bool ok;
JSObject *obj = NonGenericMethodGuard(cx, args, WeakMap_get, &WeakMapClass, &ok);
if (!obj)
return ok;
if (args.length() < 1) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_MORE_ARGS_NEEDED,
"WeakMap.get", "0", "s");
return false;
}
JSObject *key = NonNullObject(cx, &args[0]);
if (!key)
return false;
ObjectValueMap *map = GetObjectMap(obj);
if (map) {
ObjectValueMap::Ptr ptr = map->lookup(key);
if (ptr) {
args.rval() = ptr->value;
return true;
}
}
args.rval() = (args.length() > 1) ? args[1] : UndefinedValue();
return true;
}
static JSBool
WeakMap_delete(JSContext *cx, uintN argc, Value *vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
bool ok;
JSObject *obj = NonGenericMethodGuard(cx, args, WeakMap_delete, &WeakMapClass, &ok);
if (!obj)
return ok;
if (args.length() < 1) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_MORE_ARGS_NEEDED,
"WeakMap.delete", "0", "s");
return false;
}
JSObject *key = NonNullObject(cx, &args[0]);
if (!key)
return false;
ObjectValueMap *map = GetObjectMap(obj);
if (map) {
ObjectValueMap::Ptr ptr = map->lookup(key);
if (ptr) {
map->remove(ptr);
args.rval() = BooleanValue(true);
return true;
}
}
args.rval() = BooleanValue(false);
return true;
}
static JSBool
WeakMap_set(JSContext *cx, uintN argc, Value *vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
bool ok;
JSObject *obj = NonGenericMethodGuard(cx, args, WeakMap_set, &WeakMapClass, &ok);
if (!obj)
return ok;
if (args.length() < 1) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_MORE_ARGS_NEEDED,
"WeakMap.set", "0", "s");
return false;
}
JSObject *key = NonNullObject(cx, &args[0]);
if (!key)
return false;
Value value = (args.length() > 1) ? args[1] : UndefinedValue();
ObjectValueMap *map = GetObjectMap(obj);
if (!map) {
map = cx->new_<ObjectValueMap>(cx);
if (!map->init()) {
cx->delete_(map);
goto out_of_memory;
}
obj->setPrivate(map);
}
if (!map->put(key, value))
goto out_of_memory;
args.rval().setUndefined();
return true;
out_of_memory:
JS_ReportOutOfMemory(cx);
return false;
}
JS_FRIEND_API(JSBool)
JS_NondeterministicGetWeakMapKeys(JSContext *cx, JSObject *obj, JSObject **ret)
{
if (!obj || !obj->isWeakMap()) {
*ret = NULL;
return true;
}
JSObject *arr = NewDenseEmptyArray(cx);
if (!arr)
return false;
ObjectValueMap *map = GetObjectMap(obj);
if (map) {
for (ObjectValueMap::Range r = map->nondeterministicAll(); !r.empty(); r.popFront()) {
if (!js_NewbornArrayPush(cx, arr, ObjectValue(*r.front().key)))
return false;
}
}
*ret = arr;
return true;
}
static void
WeakMap_mark(JSTracer *trc, JSObject *obj)
{
if (ObjectValueMap *map = GetObjectMap(obj))
map->trace(trc);
}
static void
WeakMap_finalize(JSContext *cx, JSObject *obj)
{
ObjectValueMap *map = GetObjectMap(obj);
cx->delete_(map);
}
static JSBool
WeakMap_construct(JSContext *cx, uintN argc, Value *vp)
{
JSObject *obj = NewBuiltinClassInstance(cx, &WeakMapClass);
if (!obj)
return false;
obj->setPrivate(NULL);
vp->setObject(*obj);
return true;
}
Class js::WeakMapClass = {
"WeakMap",
JSCLASS_HAS_PRIVATE |
JSCLASS_HAS_CACHED_PROTO(JSProto_WeakMap),
JS_PropertyStub, /* addProperty */
JS_PropertyStub, /* delProperty */
JS_PropertyStub, /* getProperty */
JS_StrictPropertyStub, /* setProperty */
JS_EnumerateStub,
JS_ResolveStub,
JS_ConvertStub,
WeakMap_finalize,
NULL, /* reserved0 */
NULL, /* checkAccess */
NULL, /* call */
NULL, /* construct */
NULL, /* xdrObject */
NULL, /* hasInstance */
WeakMap_mark
};
static JSFunctionSpec weak_map_methods[] = {
JS_FN("has", WeakMap_has, 1, 0),
JS_FN("get", WeakMap_get, 2, 0),
JS_FN("delete", WeakMap_delete, 1, 0),
JS_FN("set", WeakMap_set, 2, 0),
JS_FS_END
};
JSObject *
js_InitWeakMapClass(JSContext *cx, JSObject *obj)
{
JS_ASSERT(obj->isNative());
GlobalObject *global = obj->asGlobal();
JSObject *weakMapProto = global->createBlankPrototype(cx, &WeakMapClass);
if (!weakMapProto)
return NULL;
weakMapProto->setPrivate(NULL);
JSFunction *ctor = global->createConstructor(cx, WeakMap_construct, &WeakMapClass,
CLASS_ATOM(cx, WeakMap), 0);
if (!ctor)
return NULL;
if (!LinkConstructorAndPrototype(cx, ctor, weakMapProto))
return NULL;
if (!DefinePropertiesAndBrand(cx, weakMapProto, NULL, weak_map_methods))
return NULL;
if (!DefineConstructorAndPrototype(cx, global, JSProto_WeakMap, ctor, weakMapProto))
return NULL;
return weakMapProto;
}