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xpcom/components/ModuleUtils.h@97036ab72558 (annotated)

xpcom/components/ModuleUtils.h

Tue, 06 Jan 2015 21:39:09 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Tue, 06 Jan 2015 21:39:09 +0100

branch

TOR_BUG_9701

changeset 8

97036ab72558

permissions

-rw-r--r--

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

michael@0	1	/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
michael@0	2	/* This Source Code Form is subject to the terms of the Mozilla Public
michael@0	3	* License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0	4	* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0	5
michael@0	6	#ifndef mozilla_GenericModule_h
michael@0	7	#define mozilla_GenericModule_h
michael@0	8
michael@0	9	#include "mozilla/Attributes.h"
michael@0	10	#include "mozilla/Module.h"
michael@0	11
michael@0	12	#define NS_GENERIC_FACTORY_CONSTRUCTOR(_InstanceClass) \
michael@0	13	static nsresult \
michael@0	14	_InstanceClass##Constructor(nsISupports *aOuter, REFNSIID aIID, \
michael@0	15	void **aResult) \
michael@0	16	{ \
michael@0	17	nsresult rv; \
michael@0	18	\
michael@0	19	_InstanceClass * inst; \
michael@0	20	\
michael@0	21	*aResult = nullptr; \
michael@0	22	if (nullptr != aOuter) { \
michael@0	23	rv = NS_ERROR_NO_AGGREGATION; \
michael@0	24	return rv; \
michael@0	25	} \
michael@0	26	\
michael@0	27	inst = new _InstanceClass(); \
michael@0	28	if (nullptr == inst) { \
michael@0	29	rv = NS_ERROR_OUT_OF_MEMORY; \
michael@0	30	return rv; \
michael@0	31	} \
michael@0	32	NS_ADDREF(inst); \
michael@0	33	rv = inst->QueryInterface(aIID, aResult); \
michael@0	34	NS_RELEASE(inst); \
michael@0	35	\
michael@0	36	return rv; \
michael@0	37	}
michael@0	38
michael@0	39	#define NS_GENERIC_FACTORY_CONSTRUCTOR_INIT(_InstanceClass, _InitMethod) \
michael@0	40	static nsresult \
michael@0	41	_InstanceClass##Constructor(nsISupports *aOuter, REFNSIID aIID, \
michael@0	42	void **aResult) \
michael@0	43	{ \
michael@0	44	nsresult rv; \
michael@0	45	\
michael@0	46	_InstanceClass * inst; \
michael@0	47	\
michael@0	48	*aResult = nullptr; \
michael@0	49	if (nullptr != aOuter) { \
michael@0	50	rv = NS_ERROR_NO_AGGREGATION; \
michael@0	51	return rv; \
michael@0	52	} \
michael@0	53	\
michael@0	54	inst = new _InstanceClass(); \
michael@0	55	if (nullptr == inst) { \
michael@0	56	rv = NS_ERROR_OUT_OF_MEMORY; \
michael@0	57	return rv; \
michael@0	58	} \
michael@0	59	NS_ADDREF(inst); \
michael@0	60	rv = inst->_InitMethod(); \
michael@0	61	if(NS_SUCCEEDED(rv)) { \
michael@0	62	rv = inst->QueryInterface(aIID, aResult); \
michael@0	63	} \
michael@0	64	NS_RELEASE(inst); \
michael@0	65	\
michael@0	66	return rv; \
michael@0	67	}
michael@0	68
michael@0	69	// 'Constructor' that uses an existing getter function that gets a singleton.
michael@0	70	// NOTE: assumes that getter does an AddRef - so additional AddRef is not done.
michael@0	71	#define NS_GENERIC_FACTORY_SINGLETON_CONSTRUCTOR(_InstanceClass, _GetterProc) \
michael@0	72	static nsresult \
michael@0	73	_InstanceClass##Constructor(nsISupports *aOuter, REFNSIID aIID, \
michael@0	74	void **aResult) \
michael@0	75	{ \
michael@0	76	nsresult rv; \
michael@0	77	\
michael@0	78	_InstanceClass * inst; \
michael@0	79	\
michael@0	80	*aResult = nullptr; \
michael@0	81	if (nullptr != aOuter) { \
michael@0	82	rv = NS_ERROR_NO_AGGREGATION; \
michael@0	83	return rv; \
michael@0	84	} \
michael@0	85	\
michael@0	86	inst = already_AddRefed<_InstanceClass>(_GetterProc()).take(); \
michael@0	87	if (nullptr == inst) { \
michael@0	88	rv = NS_ERROR_OUT_OF_MEMORY; \
michael@0	89	return rv; \
michael@0	90	} \
michael@0	91	/* NS_ADDREF(inst); */ \
michael@0	92	rv = inst->QueryInterface(aIID, aResult); \
michael@0	93	NS_RELEASE(inst); \
michael@0	94	\
michael@0	95	return rv; \
michael@0	96	}
michael@0	97
michael@0	98	#ifndef MOZILLA_INTERNAL_API
michael@0	99
michael@0	100	#include "nsIModule.h"
michael@0	101	#include "nsISupportsUtils.h"
michael@0	102
michael@0	103	namespace mozilla {
michael@0	104
michael@0	105	class GenericModule MOZ_FINAL : public nsIModule
michael@0	106	{
michael@0	107	public:
michael@0	108	GenericModule(const mozilla::Module* aData)
michael@0	109	: mData(aData)
michael@0	110	{
michael@0	111	}
michael@0	112
michael@0	113	NS_DECL_THREADSAFE_ISUPPORTS
michael@0	114	NS_DECL_NSIMODULE
michael@0	115
michael@0	116	private:
michael@0	117	const mozilla::Module* mData;
michael@0	118	};
michael@0	119
michael@0	120	} // namespace mozilla
michael@0	121
michael@0	122	#define NS_IMPL_MOZILLA192_NSGETMODULE(module) \
michael@0	123	extern "C" NS_EXPORT nsresult \
michael@0	124	NSGetModule(nsIComponentManager* aCompMgr, \
michael@0	125	nsIFile* aLocation, \
michael@0	126	nsIModule** aResult) \
michael@0	127	{ \
michael@0	128	*aResult = new mozilla::GenericModule(module); \
michael@0	129	NS_ADDREF(*aResult); \
michael@0	130	return NS_OK; \
michael@0	131	}
michael@0	132
michael@0	133	#endif
michael@0	134
michael@0	135	#endif // mozilla_GenericModule_h