forked from mirrors/gecko-dev
140 lines
3.8 KiB
C++
140 lines
3.8 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* vim: set ts=8 sw=4 et tw=80:
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_jsipc_JavaScriptShared_h__
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#define mozilla_jsipc_JavaScriptShared_h__
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#include "mozilla/dom/DOMTypes.h"
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#include "mozilla/jsipc/PJavaScript.h"
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#include "nsJSUtils.h"
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#include "nsFrameMessageManager.h"
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namespace mozilla {
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namespace jsipc {
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typedef uint64_t ObjectId;
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class JavaScriptShared;
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class CpowIdHolder : public CpowHolder
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{
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public:
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CpowIdHolder(JavaScriptShared *js, const InfallibleTArray<CpowEntry> &cpows)
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: js_(js),
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cpows_(cpows)
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{
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}
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bool ToObject(JSContext *cx, JSObject **objp);
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private:
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JavaScriptShared *js_;
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const InfallibleTArray<CpowEntry> &cpows_;
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};
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// Map ids -> JSObjects
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class ObjectStore
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{
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typedef js::DefaultHasher<ObjectId> TableKeyHasher;
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typedef js::HashMap<ObjectId, JS::Heap<JSObject *>, TableKeyHasher, js::SystemAllocPolicy> ObjectTable;
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public:
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ObjectStore();
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bool init();
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void trace(JSTracer *trc);
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bool add(ObjectId id, JSObject *obj);
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JSObject *find(ObjectId id);
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void remove(ObjectId id);
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private:
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ObjectTable table_;
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};
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// Map JSObjects -> ids
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class ObjectIdCache
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{
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typedef js::PointerHasher<JSObject *, 3> Hasher;
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typedef js::HashMap<JSObject *, ObjectId, Hasher, js::SystemAllocPolicy> ObjectIdTable;
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public:
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ObjectIdCache();
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bool init();
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void trace(JSTracer *trc);
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bool add(JSContext *cx, JSObject *obj, ObjectId id);
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ObjectId find(JSObject *obj);
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void remove(JSObject *obj);
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private:
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static void keyMarkCallback(JSTracer *trc, void *key, void *data);
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ObjectIdTable table_;
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};
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class JavaScriptShared
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{
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public:
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bool init();
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static const uint32_t OBJECT_EXTRA_BITS = 1;
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static const uint32_t OBJECT_IS_CALLABLE = (1 << 0);
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bool Unwrap(JSContext *cx, const InfallibleTArray<CpowEntry> &aCpows, JSObject **objp);
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bool Wrap(JSContext *cx, JS::HandleObject aObj, InfallibleTArray<CpowEntry> *outCpows);
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protected:
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bool toVariant(JSContext *cx, JS::HandleValue from, JSVariant *to);
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bool toValue(JSContext *cx, const JSVariant &from, JS::MutableHandleValue to);
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bool fromDescriptor(JSContext *cx, JS::Handle<JSPropertyDescriptor> desc, PPropertyDescriptor *out);
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bool toDescriptor(JSContext *cx, const PPropertyDescriptor &in,
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JS::MutableHandle<JSPropertyDescriptor> out);
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bool convertIdToGeckoString(JSContext *cx, JS::HandleId id, nsString *to);
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bool convertGeckoStringToId(JSContext *cx, const nsString &from, JS::MutableHandleId id);
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bool toValue(JSContext *cx, const JSVariant &from, jsval *to) {
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JS::RootedValue v(cx);
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if (!toValue(cx, from, &v))
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return false;
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*to = v;
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return true;
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}
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virtual bool makeId(JSContext *cx, JSObject *obj, ObjectId *idp) = 0;
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virtual JSObject *unwrap(JSContext *cx, ObjectId id) = 0;
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bool unwrap(JSContext *cx, ObjectId id, JS::MutableHandle<JSObject*> objp) {
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if (!id) {
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objp.set(nullptr);
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return true;
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}
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objp.set(unwrap(cx, id));
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return bool(objp.get());
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}
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static void ConvertID(const nsID &from, JSIID *to);
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static void ConvertID(const JSIID &from, nsID *to);
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JSObject *findObject(uint32_t objId) {
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return objects_.find(objId);
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}
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protected:
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ObjectStore objects_;
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};
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// Use 47 at most, to be safe, since jsval privates are encoded as doubles.
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static const uint64_t MAX_CPOW_IDS = (uint64_t(1) << 47) - 1;
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} // namespace jsipc
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} // namespace mozilla
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#endif
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