1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/js/ipc/JavaScriptShared.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,141 @@
1.4 +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
1.5 + * vim: set ts=8 sw=4 et tw=80:
1.6 + *
1.7 + * This Source Code Form is subject to the terms of the Mozilla Public
1.8 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.9 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.10 +
1.11 +#ifndef mozilla_jsipc_JavaScriptShared_h__
1.12 +#define mozilla_jsipc_JavaScriptShared_h__
1.13 +
1.14 +#include "mozilla/dom/DOMTypes.h"
1.15 +#include "mozilla/jsipc/PJavaScript.h"
1.16 +#include "nsJSUtils.h"
1.17 +#include "nsFrameMessageManager.h"
1.18 +
1.19 +namespace mozilla {
1.20 +namespace jsipc {
1.21 +
1.22 +typedef uint64_t ObjectId;
1.23 +
1.24 +class JavaScriptShared;
1.25 +
1.26 +class CpowIdHolder : public CpowHolder
1.27 +{
1.28 + public:
1.29 + CpowIdHolder(JavaScriptShared *js, const InfallibleTArray<CpowEntry> &cpows)
1.30 + : js_(js),
1.31 + cpows_(cpows)
1.32 + {
1.33 + }
1.34 +
1.35 + bool ToObject(JSContext *cx, JS::MutableHandleObject objp);
1.36 +
1.37 + private:
1.38 + JavaScriptShared *js_;
1.39 + const InfallibleTArray<CpowEntry> &cpows_;
1.40 +};
1.41 +
1.42 +// Map ids -> JSObjects
1.43 +class ObjectStore
1.44 +{
1.45 + typedef js::DefaultHasher<ObjectId> TableKeyHasher;
1.46 +
1.47 + typedef js::HashMap<ObjectId, JS::Heap<JSObject *>, TableKeyHasher, js::SystemAllocPolicy> ObjectTable;
1.48 +
1.49 + public:
1.50 + ObjectStore();
1.51 +
1.52 + bool init();
1.53 + void trace(JSTracer *trc);
1.54 +
1.55 + bool add(ObjectId id, JSObject *obj);
1.56 + JSObject *find(ObjectId id);
1.57 + void remove(ObjectId id);
1.58 +
1.59 + private:
1.60 + ObjectTable table_;
1.61 +};
1.62 +
1.63 +// Map JSObjects -> ids
1.64 +class ObjectIdCache
1.65 +{
1.66 + typedef js::PointerHasher<JSObject *, 3> Hasher;
1.67 + typedef js::HashMap<JSObject *, ObjectId, Hasher, js::SystemAllocPolicy> ObjectIdTable;
1.68 +
1.69 + public:
1.70 + ObjectIdCache();
1.71 + ~ObjectIdCache();
1.72 +
1.73 + bool init();
1.74 + void trace(JSTracer *trc);
1.75 +
1.76 + bool add(JSContext *cx, JSObject *obj, ObjectId id);
1.77 + ObjectId find(JSObject *obj);
1.78 + void remove(JSObject *obj);
1.79 +
1.80 + private:
1.81 + static void keyMarkCallback(JSTracer *trc, JSObject *key, void *data);
1.82 +
1.83 + ObjectIdTable *table_;
1.84 +};
1.85 +
1.86 +class JavaScriptShared
1.87 +{
1.88 + public:
1.89 + bool init();
1.90 +
1.91 + static const uint32_t OBJECT_EXTRA_BITS = 1;
1.92 + static const uint32_t OBJECT_IS_CALLABLE = (1 << 0);
1.93 +
1.94 + bool Unwrap(JSContext *cx, const InfallibleTArray<CpowEntry> &aCpows, JS::MutableHandleObject objp);
1.95 + bool Wrap(JSContext *cx, JS::HandleObject aObj, InfallibleTArray<CpowEntry> *outCpows);
1.96 +
1.97 + protected:
1.98 + bool toVariant(JSContext *cx, JS::HandleValue from, JSVariant *to);
1.99 + bool toValue(JSContext *cx, const JSVariant &from, JS::MutableHandleValue to);
1.100 + bool fromDescriptor(JSContext *cx, JS::Handle<JSPropertyDescriptor> desc, PPropertyDescriptor *out);
1.101 + bool toDescriptor(JSContext *cx, const PPropertyDescriptor &in,
1.102 + JS::MutableHandle<JSPropertyDescriptor> out);
1.103 + bool convertIdToGeckoString(JSContext *cx, JS::HandleId id, nsString *to);
1.104 + bool convertGeckoStringToId(JSContext *cx, const nsString &from, JS::MutableHandleId id);
1.105 +
1.106 + bool toValue(JSContext *cx, const JSVariant &from, jsval *to) {
1.107 + JS::RootedValue v(cx);
1.108 + if (!toValue(cx, from, &v))
1.109 + return false;
1.110 + *to = v;
1.111 + return true;
1.112 + }
1.113 +
1.114 + virtual bool makeId(JSContext *cx, JSObject *obj, ObjectId *idp) = 0;
1.115 + virtual JSObject *unwrap(JSContext *cx, ObjectId id) = 0;
1.116 +
1.117 + bool unwrap(JSContext *cx, ObjectId id, JS::MutableHandle<JSObject*> objp) {
1.118 + if (!id) {
1.119 + objp.set(nullptr);
1.120 + return true;
1.121 + }
1.122 +
1.123 + objp.set(unwrap(cx, id));
1.124 + return bool(objp.get());
1.125 + }
1.126 +
1.127 + static void ConvertID(const nsID &from, JSIID *to);
1.128 + static void ConvertID(const JSIID &from, nsID *to);
1.129 +
1.130 + JSObject *findObject(uint32_t objId) {
1.131 + return objects_.find(objId);
1.132 + }
1.133 +
1.134 + protected:
1.135 + ObjectStore objects_;
1.136 +};
1.137 +
1.138 +// Use 47 at most, to be safe, since jsval privates are encoded as doubles.
1.139 +static const uint64_t MAX_CPOW_IDS = (uint64_t(1) << 47) - 1;
1.140 +
1.141 +} // namespace jsipc
1.142 +} // namespace mozilla
1.143 +
1.144 +#endif
