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js/ipc/JavaScriptShared.h@a63d609f5ebe (annotated)

js/ipc/JavaScriptShared.h

Thu, 15 Jan 2015 15:55:04 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Thu, 15 Jan 2015 15:55:04 +0100

branch

TOR_BUG_9701

changeset 9

a63d609f5ebe

permissions

-rw-r--r--

Back out 97036ab72558 which inappropriately compared turds to third parties.

michael@0	1	/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
michael@0	2	* vim: set ts=8 sw=4 et tw=80:
michael@0	3	*
michael@0	4	* This Source Code Form is subject to the terms of the Mozilla Public
michael@0	5	* License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0	6	* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0	7
michael@0	8	#ifndef mozilla_jsipc_JavaScriptShared_h__
michael@0	9	#define mozilla_jsipc_JavaScriptShared_h__
michael@0	10
michael@0	11	#include "mozilla/dom/DOMTypes.h"
michael@0	12	#include "mozilla/jsipc/PJavaScript.h"
michael@0	13	#include "nsJSUtils.h"
michael@0	14	#include "nsFrameMessageManager.h"
michael@0	15
michael@0	16	namespace mozilla {
michael@0	17	namespace jsipc {
michael@0	18
michael@0	19	typedef uint64_t ObjectId;
michael@0	20
michael@0	21	class JavaScriptShared;
michael@0	22
michael@0	23	class CpowIdHolder : public CpowHolder
michael@0	24	{
michael@0	25	public:
michael@0	26	CpowIdHolder(JavaScriptShared *js, const InfallibleTArray<CpowEntry> &cpows)
michael@0	27	: js_(js),
michael@0	28	cpows_(cpows)
michael@0	29	{
michael@0	30	}
michael@0	31
michael@0	32	bool ToObject(JSContext *cx, JS::MutableHandleObject objp);
michael@0	33
michael@0	34	private:
michael@0	35	JavaScriptShared *js_;
michael@0	36	const InfallibleTArray<CpowEntry> &cpows_;
michael@0	37	};
michael@0	38
michael@0	39	// Map ids -> JSObjects
michael@0	40	class ObjectStore
michael@0	41	{
michael@0	42	typedef js::DefaultHasher<ObjectId> TableKeyHasher;
michael@0	43
michael@0	44	typedef js::HashMap<ObjectId, JS::Heap<JSObject *>, TableKeyHasher, js::SystemAllocPolicy> ObjectTable;
michael@0	45
michael@0	46	public:
michael@0	47	ObjectStore();
michael@0	48
michael@0	49	bool init();
michael@0	50	void trace(JSTracer *trc);
michael@0	51
michael@0	52	bool add(ObjectId id, JSObject *obj);
michael@0	53	JSObject *find(ObjectId id);
michael@0	54	void remove(ObjectId id);
michael@0	55
michael@0	56	private:
michael@0	57	ObjectTable table_;
michael@0	58	};
michael@0	59
michael@0	60	// Map JSObjects -> ids
michael@0	61	class ObjectIdCache
michael@0	62	{
michael@0	63	typedef js::PointerHasher<JSObject *, 3> Hasher;
michael@0	64	typedef js::HashMap<JSObject *, ObjectId, Hasher, js::SystemAllocPolicy> ObjectIdTable;
michael@0	65
michael@0	66	public:
michael@0	67	ObjectIdCache();
michael@0	68	~ObjectIdCache();
michael@0	69
michael@0	70	bool init();
michael@0	71	void trace(JSTracer *trc);
michael@0	72
michael@0	73	bool add(JSContext *cx, JSObject *obj, ObjectId id);
michael@0	74	ObjectId find(JSObject *obj);
michael@0	75	void remove(JSObject *obj);
michael@0	76
michael@0	77	private:
michael@0	78	static void keyMarkCallback(JSTracer *trc, JSObject *key, void *data);
michael@0	79
michael@0	80	ObjectIdTable *table_;
michael@0	81	};
michael@0	82
michael@0	83	class JavaScriptShared
michael@0	84	{
michael@0	85	public:
michael@0	86	bool init();
michael@0	87
michael@0	88	static const uint32_t OBJECT_EXTRA_BITS = 1;
michael@0	89	static const uint32_t OBJECT_IS_CALLABLE = (1 << 0);
michael@0	90
michael@0	91	bool Unwrap(JSContext *cx, const InfallibleTArray<CpowEntry> &aCpows, JS::MutableHandleObject objp);
michael@0	92	bool Wrap(JSContext *cx, JS::HandleObject aObj, InfallibleTArray<CpowEntry> *outCpows);
michael@0	93
michael@0	94	protected:
michael@0	95	bool toVariant(JSContext *cx, JS::HandleValue from, JSVariant *to);
michael@0	96	bool toValue(JSContext *cx, const JSVariant &from, JS::MutableHandleValue to);
michael@0	97	bool fromDescriptor(JSContext *cx, JS::Handle<JSPropertyDescriptor> desc, PPropertyDescriptor *out);
michael@0	98	bool toDescriptor(JSContext *cx, const PPropertyDescriptor &in,
michael@0	99	JS::MutableHandle<JSPropertyDescriptor> out);
michael@0	100	bool convertIdToGeckoString(JSContext *cx, JS::HandleId id, nsString *to);
michael@0	101	bool convertGeckoStringToId(JSContext *cx, const nsString &from, JS::MutableHandleId id);
michael@0	102
michael@0	103	bool toValue(JSContext *cx, const JSVariant &from, jsval *to) {
michael@0	104	JS::RootedValue v(cx);
michael@0	105	if (!toValue(cx, from, &v))
michael@0	106	return false;
michael@0	107	*to = v;
michael@0	108	return true;
michael@0	109	}
michael@0	110
michael@0	111	virtual bool makeId(JSContext *cx, JSObject *obj, ObjectId *idp) = 0;
michael@0	112	virtual JSObject *unwrap(JSContext *cx, ObjectId id) = 0;
michael@0	113
michael@0	114	bool unwrap(JSContext *cx, ObjectId id, JS::MutableHandle<JSObject*> objp) {
michael@0	115	if (!id) {
michael@0	116	objp.set(nullptr);
michael@0	117	return true;
michael@0	118	}
michael@0	119
michael@0	120	objp.set(unwrap(cx, id));
michael@0	121	return bool(objp.get());
michael@0	122	}
michael@0	123
michael@0	124	static void ConvertID(const nsID &from, JSIID *to);
michael@0	125	static void ConvertID(const JSIID &from, nsID *to);
michael@0	126
michael@0	127	JSObject *findObject(uint32_t objId) {
michael@0	128	return objects_.find(objId);
michael@0	129	}
michael@0	130
michael@0	131	protected:
michael@0	132	ObjectStore objects_;
michael@0	133	};
michael@0	134
michael@0	135	// Use 47 at most, to be safe, since jsval privates are encoded as doubles.
michael@0	136	static const uint64_t MAX_CPOW_IDS = (uint64_t(1) << 47) - 1;
michael@0	137
michael@0	138	} // namespace jsipc
michael@0	139	} // namespace mozilla
michael@0	140
michael@0	141	#endif