mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-05 16:46:26 +00:00
1138 lines
54 KiB
C++
1138 lines
54 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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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// IWYU pragma: private, include "nsISupports.h"
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#ifndef nsISupportsImpl_h__
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#define nsISupportsImpl_h__
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#include "nscore.h"
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#include "nsISupportsBase.h"
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#include "nsISupportsUtils.h"
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#if !defined(XPCOM_GLUE_AVOID_NSPR)
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#include "prthread.h" /* needed for thread-safety checks */
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#endif // !XPCOM_GLUE_AVOID_NSPR
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#include "nsDebug.h"
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#include "nsXPCOM.h"
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#ifndef XPCOM_GLUE
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#include "mozilla/Atomics.h"
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#endif
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#include "mozilla/Attributes.h"
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#include "mozilla/Assertions.h"
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#include "mozilla/Compiler.h"
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#include "mozilla/Likely.h"
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#include "mozilla/MacroArgs.h"
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#include "mozilla/MacroForEach.h"
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namespace mozilla {
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template <typename T>
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struct HasDangerousPublicDestructor
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{
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static const bool value = false;
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};
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}
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#if defined(__clang__)
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// bug 1028428 shows that at least in FreeBSD 10.0 with Clang 3.4 and libc++ 3.4,
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// std::is_destructible is buggy in that it returns false when it should return true
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// on ipc::SharedMemory. On the other hand, all Clang versions currently in use
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// seem to handle the fallback just fine.
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# define MOZ_CAN_USE_IS_DESTRUCTIBLE_FALLBACK
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#elif defined(__GNUC__)
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// GCC 4.7 is has buggy std::is_destructible
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# if MOZ_USING_LIBSTDCXX && MOZ_GCC_VERSION_AT_LEAST(4, 8, 0)
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# define MOZ_HAVE_STD_IS_DESTRUCTIBLE
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// Some GCC versions have an ICE when using destructors in decltype().
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// Works for me on GCC 4.8.2 on Fedora 20 x86-64.
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# elif MOZ_GCC_VERSION_AT_LEAST(4, 8, 2)
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# define MOZ_CAN_USE_IS_DESTRUCTIBLE_FALLBACK
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# endif
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#endif
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#ifdef MOZ_HAVE_STD_IS_DESTRUCTIBLE
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# include <type_traits>
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# define MOZ_IS_DESTRUCTIBLE(X) (std::is_destructible<X>::value)
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#elif defined MOZ_CAN_USE_IS_DESTRUCTIBLE_FALLBACK
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namespace mozilla {
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struct IsDestructibleFallbackImpl
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{
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template<typename T> static T&& Declval();
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template<typename T, typename = decltype(Declval<T>().~T())>
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static TrueType Test(int);
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template<typename>
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static FalseType Test(...);
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template<typename T>
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struct Selector
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{
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typedef decltype(Test<T>(0)) type;
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};
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};
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template<typename T>
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struct IsDestructibleFallback
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: IsDestructibleFallbackImpl::Selector<T>::type
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{
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};
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}
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# define MOZ_IS_DESTRUCTIBLE(X) (mozilla::IsDestructibleFallback<X>::value)
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#endif
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#ifdef MOZ_IS_DESTRUCTIBLE
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#define MOZ_ASSERT_TYPE_OK_FOR_REFCOUNTING(X) \
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static_assert(!MOZ_IS_DESTRUCTIBLE(X) || \
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mozilla::HasDangerousPublicDestructor<X>::value, \
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"Reference-counted class " #X " should not have a public destructor. " \
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"Try to make this class's destructor non-public. If that is really " \
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"not possible, you can whitelist this class by providing a " \
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"HasDangerousPublicDestructor specialization for it."); \
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static_assert(!mozilla::HasDangerousPublicDestructor<X>::value || \
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MOZ_IS_DESTRUCTIBLE(X), \
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"Class " #X " has no public destructor. That's good! So please " \
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"remove the HasDangerousPublicDestructor specialization for it.");
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#else
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#define MOZ_ASSERT_TYPE_OK_FOR_REFCOUNTING(X)
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#endif
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inline nsISupports*
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ToSupports(nsISupports* aSupports)
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{
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return aSupports;
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}
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inline nsISupports*
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ToCanonicalSupports(nsISupports* aSupports)
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{
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return nullptr;
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}
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////////////////////////////////////////////////////////////////////////////////
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// Macros to help detect thread-safety:
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#if (defined(DEBUG) || (defined(NIGHTLY_BUILD) && !defined(MOZ_PROFILING))) && !defined(XPCOM_GLUE_AVOID_NSPR)
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class nsAutoOwningThread
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{
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public:
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nsAutoOwningThread() { mThread = PR_GetCurrentThread(); }
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void* GetThread() const { return mThread; }
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private:
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void* mThread;
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};
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#define NS_DECL_OWNINGTHREAD nsAutoOwningThread _mOwningThread;
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#define NS_ASSERT_OWNINGTHREAD_AGGREGATE(agg, _class) \
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NS_CheckThreadSafe(agg->_mOwningThread.GetThread(), #_class " not thread-safe")
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#define NS_ASSERT_OWNINGTHREAD(_class) NS_ASSERT_OWNINGTHREAD_AGGREGATE(this, _class)
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#else // !DEBUG && !(NIGHTLY_BUILD && !MOZ_PROFILING)
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#define NS_DECL_OWNINGTHREAD /* nothing */
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#define NS_ASSERT_OWNINGTHREAD_AGGREGATE(agg, _class) ((void)0)
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#define NS_ASSERT_OWNINGTHREAD(_class) ((void)0)
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#endif // DEBUG || (NIGHTLY_BUILD && !MOZ_PROFILING)
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// Macros for reference-count and constructor logging
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#ifdef NS_BUILD_REFCNT_LOGGING
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#define NS_LOG_ADDREF(_p, _rc, _type, _size) \
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NS_LogAddRef((_p), (_rc), (_type), (uint32_t) (_size))
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#define NS_LOG_RELEASE(_p, _rc, _type) \
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NS_LogRelease((_p), (_rc), (_type))
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#include "mozilla/TypeTraits.h"
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#define MOZ_ASSERT_CLASSNAME(_type) \
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static_assert(mozilla::IsClass<_type>::value, \
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"Token '" #_type "' is not a class type.")
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// Older versions of gcc can't instantiate local classes in templates.
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// GCC 4.7 doesn't have this problem.
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#if MOZ_IS_GCC
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# if !MOZ_GCC_VERSION_AT_LEAST(4, 7, 0)
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# undef MOZ_ASSERT_CLASSNAME
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# define MOZ_ASSERT_CLASSNAME(_type)
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# endif
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#endif
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// Note that the following constructor/destructor logging macros are redundant
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// for refcounted objects that log via the NS_LOG_ADDREF/NS_LOG_RELEASE macros.
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// Refcount logging is preferred.
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#define MOZ_COUNT_CTOR(_type) \
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do { \
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MOZ_ASSERT_CLASSNAME(_type); \
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NS_LogCtor((void*)this, #_type, sizeof(*this)); \
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} while (0)
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#define MOZ_COUNT_CTOR_INHERITED(_type, _base) \
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do { \
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MOZ_ASSERT_CLASSNAME(_type); \
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MOZ_ASSERT_CLASSNAME(_base); \
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NS_LogCtor((void*)this, #_type, sizeof(*this) - sizeof(_base)); \
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} while (0)
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#define MOZ_COUNT_DTOR(_type) \
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do { \
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MOZ_ASSERT_CLASSNAME(_type); \
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NS_LogDtor((void*)this, #_type, sizeof(*this)); \
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} while (0)
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#define MOZ_COUNT_DTOR_INHERITED(_type, _base) \
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do { \
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MOZ_ASSERT_CLASSNAME(_type); \
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MOZ_ASSERT_CLASSNAME(_base); \
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NS_LogDtor((void*)this, #_type, sizeof(*this) - sizeof(_base)); \
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} while (0)
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/* nsCOMPtr.h allows these macros to be defined by clients
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* These logging functions require dynamic_cast<void*>, so they don't
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* do anything useful if we don't have dynamic_cast<void*>. */
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#define NSCAP_LOG_ASSIGNMENT(_c, _p) \
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if (_p) \
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NS_LogCOMPtrAddRef((_c),static_cast<nsISupports*>(_p))
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#define NSCAP_LOG_RELEASE(_c, _p) \
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if (_p) \
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NS_LogCOMPtrRelease((_c), static_cast<nsISupports*>(_p))
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#else /* !NS_BUILD_REFCNT_LOGGING */
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#define NS_LOG_ADDREF(_p, _rc, _type, _size)
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#define NS_LOG_RELEASE(_p, _rc, _type)
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#define MOZ_COUNT_CTOR(_type)
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#define MOZ_COUNT_CTOR_INHERITED(_type, _base)
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#define MOZ_COUNT_DTOR(_type)
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#define MOZ_COUNT_DTOR_INHERITED(_type, _base)
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#endif /* NS_BUILD_REFCNT_LOGGING */
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// Support for ISupports classes which interact with cycle collector.
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#define NS_NUMBER_OF_FLAGS_IN_REFCNT 2
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#define NS_IN_PURPLE_BUFFER (1 << 0)
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#define NS_IS_PURPLE (1 << 1)
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#define NS_REFCOUNT_CHANGE (1 << NS_NUMBER_OF_FLAGS_IN_REFCNT)
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#define NS_REFCOUNT_VALUE(_val) (_val >> NS_NUMBER_OF_FLAGS_IN_REFCNT)
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class nsCycleCollectingAutoRefCnt
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{
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public:
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nsCycleCollectingAutoRefCnt() : mRefCntAndFlags(0) {}
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explicit nsCycleCollectingAutoRefCnt(uintptr_t aValue)
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: mRefCntAndFlags(aValue << NS_NUMBER_OF_FLAGS_IN_REFCNT)
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{
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}
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MOZ_ALWAYS_INLINE uintptr_t incr(nsISupports* aOwner)
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{
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return incr(aOwner, nullptr);
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}
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MOZ_ALWAYS_INLINE uintptr_t incr(void* aOwner,
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nsCycleCollectionParticipant* aCp)
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{
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mRefCntAndFlags += NS_REFCOUNT_CHANGE;
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mRefCntAndFlags &= ~NS_IS_PURPLE;
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// For incremental cycle collection, use the purple buffer to track objects
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// that have been AddRef'd.
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if (!IsInPurpleBuffer()) {
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mRefCntAndFlags |= NS_IN_PURPLE_BUFFER;
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// Refcount isn't zero, so Suspect won't delete anything.
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MOZ_ASSERT(get() > 0);
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NS_CycleCollectorSuspect3(aOwner, aCp, this, nullptr);
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}
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return NS_REFCOUNT_VALUE(mRefCntAndFlags);
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}
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MOZ_ALWAYS_INLINE void stabilizeForDeletion()
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{
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// Set refcnt to 1 and mark us to be in the purple buffer.
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// This way decr won't call suspect again.
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mRefCntAndFlags = NS_REFCOUNT_CHANGE | NS_IN_PURPLE_BUFFER;
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}
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MOZ_ALWAYS_INLINE uintptr_t decr(nsISupports* aOwner,
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bool* aShouldDelete = nullptr)
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{
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return decr(aOwner, nullptr, aShouldDelete);
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}
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MOZ_ALWAYS_INLINE uintptr_t decr(void* aOwner,
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nsCycleCollectionParticipant* aCp,
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bool* aShouldDelete = nullptr)
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{
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MOZ_ASSERT(get() > 0);
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if (!IsInPurpleBuffer()) {
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mRefCntAndFlags -= NS_REFCOUNT_CHANGE;
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mRefCntAndFlags |= (NS_IN_PURPLE_BUFFER | NS_IS_PURPLE);
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uintptr_t retval = NS_REFCOUNT_VALUE(mRefCntAndFlags);
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// Suspect may delete 'aOwner' and 'this'!
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NS_CycleCollectorSuspect3(aOwner, aCp, this, aShouldDelete);
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return retval;
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}
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mRefCntAndFlags -= NS_REFCOUNT_CHANGE;
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mRefCntAndFlags |= (NS_IN_PURPLE_BUFFER | NS_IS_PURPLE);
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return NS_REFCOUNT_VALUE(mRefCntAndFlags);
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}
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MOZ_ALWAYS_INLINE void RemovePurple()
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{
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MOZ_ASSERT(IsPurple(), "must be purple");
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mRefCntAndFlags &= ~NS_IS_PURPLE;
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}
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MOZ_ALWAYS_INLINE void RemoveFromPurpleBuffer()
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{
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MOZ_ASSERT(IsInPurpleBuffer());
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mRefCntAndFlags &= ~(NS_IS_PURPLE | NS_IN_PURPLE_BUFFER);
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}
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MOZ_ALWAYS_INLINE bool IsPurple() const
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{
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return !!(mRefCntAndFlags & NS_IS_PURPLE);
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}
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MOZ_ALWAYS_INLINE bool IsInPurpleBuffer() const
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{
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return !!(mRefCntAndFlags & NS_IN_PURPLE_BUFFER);
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}
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MOZ_ALWAYS_INLINE nsrefcnt get() const
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{
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return NS_REFCOUNT_VALUE(mRefCntAndFlags);
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}
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MOZ_ALWAYS_INLINE operator nsrefcnt() const
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{
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return get();
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}
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private:
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uintptr_t mRefCntAndFlags;
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};
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class nsAutoRefCnt
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{
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public:
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nsAutoRefCnt() : mValue(0) {}
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explicit nsAutoRefCnt(nsrefcnt aValue) : mValue(aValue) {}
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// only support prefix increment/decrement
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nsrefcnt operator++() { return ++mValue; }
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nsrefcnt operator--() { return --mValue; }
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nsrefcnt operator=(nsrefcnt aValue) { return (mValue = aValue); }
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operator nsrefcnt() const { return mValue; }
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nsrefcnt get() const { return mValue; }
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static const bool isThreadSafe = false;
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private:
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nsrefcnt operator++(int) MOZ_DELETE;
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nsrefcnt operator--(int) MOZ_DELETE;
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nsrefcnt mValue;
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};
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#ifndef XPCOM_GLUE
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namespace mozilla {
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class ThreadSafeAutoRefCnt
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{
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public:
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ThreadSafeAutoRefCnt() : mValue(0) {}
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explicit ThreadSafeAutoRefCnt(nsrefcnt aValue) : mValue(aValue) {}
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// only support prefix increment/decrement
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MOZ_ALWAYS_INLINE nsrefcnt operator++() { return ++mValue; }
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MOZ_ALWAYS_INLINE nsrefcnt operator--() { return --mValue; }
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MOZ_ALWAYS_INLINE nsrefcnt operator=(nsrefcnt aValue)
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{
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return (mValue = aValue);
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}
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MOZ_ALWAYS_INLINE operator nsrefcnt() const { return mValue; }
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MOZ_ALWAYS_INLINE nsrefcnt get() const { return mValue; }
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static const bool isThreadSafe = true;
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private:
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nsrefcnt operator++(int) MOZ_DELETE;
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nsrefcnt operator--(int) MOZ_DELETE;
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// In theory, RelaseAcquire consistency (but no weaker) is sufficient for
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// the counter. Making it weaker could speed up builds on ARM (but not x86),
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// but could break pre-existing code that assumes sequential consistency.
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Atomic<nsrefcnt> mValue;
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};
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}
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#endif
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///////////////////////////////////////////////////////////////////////////////
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/**
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* Declare the reference count variable and the implementations of the
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* AddRef and QueryInterface methods.
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*/
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#define NS_DECL_ISUPPORTS \
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public: \
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NS_IMETHOD QueryInterface(REFNSIID aIID, \
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void** aInstancePtr); \
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NS_IMETHOD_(MozExternalRefCountType) AddRef(void); \
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NS_IMETHOD_(MozExternalRefCountType) Release(void); \
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protected: \
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nsAutoRefCnt mRefCnt; \
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NS_DECL_OWNINGTHREAD \
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public:
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#define NS_DECL_THREADSAFE_ISUPPORTS \
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public: \
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NS_IMETHOD QueryInterface(REFNSIID aIID, \
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void** aInstancePtr); \
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NS_IMETHOD_(MozExternalRefCountType) AddRef(void); \
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NS_IMETHOD_(MozExternalRefCountType) Release(void); \
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protected: \
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::mozilla::ThreadSafeAutoRefCnt mRefCnt; \
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NS_DECL_OWNINGTHREAD \
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public:
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#define NS_DECL_CYCLE_COLLECTING_ISUPPORTS \
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public: \
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NS_IMETHOD QueryInterface(REFNSIID aIID, \
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void** aInstancePtr); \
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NS_IMETHOD_(MozExternalRefCountType) AddRef(void); \
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NS_IMETHOD_(MozExternalRefCountType) Release(void); \
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NS_IMETHOD_(void) DeleteCycleCollectable(void); \
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protected: \
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nsCycleCollectingAutoRefCnt mRefCnt; \
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NS_DECL_OWNINGTHREAD \
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public:
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|
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///////////////////////////////////////////////////////////////////////////////
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/*
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|
* Implementation of AddRef and Release for non-nsISupports (ie "native")
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* cycle-collected classes that use the purple buffer to avoid leaks.
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*/
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#define NS_IMPL_CC_NATIVE_ADDREF_BODY(_class) \
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MOZ_ASSERT_TYPE_OK_FOR_REFCOUNTING(_class) \
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MOZ_ASSERT(int32_t(mRefCnt) >= 0, "illegal refcnt"); \
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NS_ASSERT_OWNINGTHREAD(_class); \
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nsrefcnt count = \
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mRefCnt.incr(static_cast<void*>(this), \
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_class::NS_CYCLE_COLLECTION_INNERCLASS::GetParticipant()); \
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NS_LOG_ADDREF(this, count, #_class, sizeof(*this)); \
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return count;
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#define NS_IMPL_CC_NATIVE_RELEASE_BODY(_class) \
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MOZ_ASSERT(int32_t(mRefCnt) > 0, "dup release"); \
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NS_ASSERT_OWNINGTHREAD(_class); \
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|
nsrefcnt count = \
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mRefCnt.decr(static_cast<void*>(this), \
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_class::NS_CYCLE_COLLECTION_INNERCLASS::GetParticipant()); \
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NS_LOG_RELEASE(this, count, #_class); \
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return count;
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#define NS_IMPL_CYCLE_COLLECTING_NATIVE_ADDREF(_class) \
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NS_METHOD_(MozExternalRefCountType) _class::AddRef(void) \
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{ \
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NS_IMPL_CC_NATIVE_ADDREF_BODY(_class) \
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}
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#define NS_IMPL_CYCLE_COLLECTING_NATIVE_RELEASE_WITH_LAST_RELEASE(_class, _last) \
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NS_METHOD_(MozExternalRefCountType) _class::Release(void) \
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|
{ \
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MOZ_ASSERT(int32_t(mRefCnt) > 0, "dup release"); \
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NS_ASSERT_OWNINGTHREAD(_class); \
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bool shouldDelete = false; \
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nsrefcnt count = \
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mRefCnt.decr(static_cast<void*>(this), \
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_class::NS_CYCLE_COLLECTION_INNERCLASS::GetParticipant(), \
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&shouldDelete); \
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NS_LOG_RELEASE(this, count, #_class); \
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|
if (count == 0) { \
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mRefCnt.incr(static_cast<void*>(this), \
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_class::NS_CYCLE_COLLECTION_INNERCLASS::GetParticipant()); \
|
|
_last; \
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mRefCnt.decr(static_cast<void*>(this), \
|
|
_class::NS_CYCLE_COLLECTION_INNERCLASS::GetParticipant()); \
|
|
if (shouldDelete) { \
|
|
mRefCnt.stabilizeForDeletion(); \
|
|
DeleteCycleCollectable(); \
|
|
} \
|
|
} \
|
|
return count; \
|
|
}
|
|
|
|
#define NS_IMPL_CYCLE_COLLECTING_NATIVE_RELEASE(_class) \
|
|
NS_METHOD_(MozExternalRefCountType) _class::Release(void) \
|
|
{ \
|
|
NS_IMPL_CC_NATIVE_RELEASE_BODY(_class) \
|
|
}
|
|
|
|
#define NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(_class) \
|
|
public: \
|
|
NS_METHOD_(MozExternalRefCountType) AddRef(void) { \
|
|
NS_IMPL_CC_NATIVE_ADDREF_BODY(_class) \
|
|
} \
|
|
NS_METHOD_(MozExternalRefCountType) Release(void) { \
|
|
NS_IMPL_CC_NATIVE_RELEASE_BODY(_class) \
|
|
} \
|
|
protected: \
|
|
nsCycleCollectingAutoRefCnt mRefCnt; \
|
|
NS_DECL_OWNINGTHREAD \
|
|
public:
|
|
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
/**
|
|
* Previously used to initialize the reference count, but no longer needed.
|
|
*
|
|
* DEPRECATED.
|
|
*/
|
|
#define NS_INIT_ISUPPORTS() ((void)0)
|
|
|
|
/**
|
|
* Use this macro to declare and implement the AddRef & Release methods for a
|
|
* given non-XPCOM <i>_class</i>.
|
|
*
|
|
* @param _class The name of the class implementing the method
|
|
*/
|
|
#define NS_INLINE_DECL_REFCOUNTING(_class) \
|
|
public: \
|
|
NS_METHOD_(MozExternalRefCountType) AddRef(void) { \
|
|
MOZ_ASSERT_TYPE_OK_FOR_REFCOUNTING(_class) \
|
|
MOZ_ASSERT(int32_t(mRefCnt) >= 0, "illegal refcnt"); \
|
|
NS_ASSERT_OWNINGTHREAD(_class); \
|
|
++mRefCnt; \
|
|
NS_LOG_ADDREF(this, mRefCnt, #_class, sizeof(*this)); \
|
|
return mRefCnt; \
|
|
} \
|
|
NS_METHOD_(MozExternalRefCountType) Release(void) { \
|
|
MOZ_ASSERT(int32_t(mRefCnt) > 0, "dup release"); \
|
|
NS_ASSERT_OWNINGTHREAD(_class); \
|
|
--mRefCnt; \
|
|
NS_LOG_RELEASE(this, mRefCnt, #_class); \
|
|
if (mRefCnt == 0) { \
|
|
NS_ASSERT_OWNINGTHREAD(_class); \
|
|
mRefCnt = 1; /* stabilize */ \
|
|
delete this; \
|
|
return 0; \
|
|
} \
|
|
return mRefCnt; \
|
|
} \
|
|
protected: \
|
|
nsAutoRefCnt mRefCnt; \
|
|
NS_DECL_OWNINGTHREAD \
|
|
public:
|
|
|
|
/**
|
|
* Use this macro to declare and implement the AddRef & Release methods for a
|
|
* given non-XPCOM <i>_class</i> in a threadsafe manner.
|
|
*
|
|
* DOES NOT DO REFCOUNT STABILIZATION!
|
|
*
|
|
* @param _class The name of the class implementing the method
|
|
*/
|
|
#define NS_INLINE_DECL_THREADSAFE_REFCOUNTING(_class) \
|
|
public: \
|
|
NS_METHOD_(MozExternalRefCountType) AddRef(void) { \
|
|
MOZ_ASSERT_TYPE_OK_FOR_REFCOUNTING(_class) \
|
|
MOZ_ASSERT(int32_t(mRefCnt) >= 0, "illegal refcnt"); \
|
|
nsrefcnt count = ++mRefCnt; \
|
|
NS_LOG_ADDREF(this, count, #_class, sizeof(*this)); \
|
|
return (nsrefcnt) count; \
|
|
} \
|
|
NS_METHOD_(MozExternalRefCountType) Release(void) { \
|
|
MOZ_ASSERT(int32_t(mRefCnt) > 0, "dup release"); \
|
|
nsrefcnt count = --mRefCnt; \
|
|
NS_LOG_RELEASE(this, count, #_class); \
|
|
if (count == 0) { \
|
|
delete (this); \
|
|
return 0; \
|
|
} \
|
|
return count; \
|
|
} \
|
|
protected: \
|
|
::mozilla::ThreadSafeAutoRefCnt mRefCnt; \
|
|
public:
|
|
|
|
/**
|
|
* Use this macro to implement the AddRef method for a given <i>_class</i>
|
|
* @param _class The name of the class implementing the method
|
|
*/
|
|
#define NS_IMPL_ADDREF(_class) \
|
|
NS_IMETHODIMP_(MozExternalRefCountType) _class::AddRef(void) \
|
|
{ \
|
|
MOZ_ASSERT_TYPE_OK_FOR_REFCOUNTING(_class) \
|
|
MOZ_ASSERT(int32_t(mRefCnt) >= 0, "illegal refcnt"); \
|
|
if (!mRefCnt.isThreadSafe) \
|
|
NS_ASSERT_OWNINGTHREAD(_class); \
|
|
nsrefcnt count = ++mRefCnt; \
|
|
NS_LOG_ADDREF(this, count, #_class, sizeof(*this)); \
|
|
return count; \
|
|
}
|
|
|
|
/**
|
|
* Use this macro to implement the AddRef method for a given <i>_class</i>
|
|
* implemented as a wholly owned aggregated object intended to implement
|
|
* interface(s) for its owner
|
|
* @param _class The name of the class implementing the method
|
|
* @param _aggregator the owning/containing object
|
|
*/
|
|
#define NS_IMPL_ADDREF_USING_AGGREGATOR(_class, _aggregator) \
|
|
NS_IMETHODIMP_(MozExternalRefCountType) _class::AddRef(void) \
|
|
{ \
|
|
MOZ_ASSERT_TYPE_OK_FOR_REFCOUNTING(_class) \
|
|
NS_PRECONDITION(_aggregator, "null aggregator"); \
|
|
return (_aggregator)->AddRef(); \
|
|
}
|
|
|
|
/**
|
|
* Use this macro to implement the Release method for a given
|
|
* <i>_class</i>.
|
|
* @param _class The name of the class implementing the method
|
|
* @param _destroy A statement that is executed when the object's
|
|
* refcount drops to zero.
|
|
*
|
|
* For example,
|
|
*
|
|
* NS_IMPL_RELEASE_WITH_DESTROY(Foo, Destroy(this))
|
|
*
|
|
* will cause
|
|
*
|
|
* Destroy(this);
|
|
*
|
|
* to be invoked when the object's refcount drops to zero. This
|
|
* allows for arbitrary teardown activity to occur (e.g., deallocation
|
|
* of object allocated with placement new).
|
|
*/
|
|
#define NS_IMPL_RELEASE_WITH_DESTROY(_class, _destroy) \
|
|
NS_IMETHODIMP_(MozExternalRefCountType) _class::Release(void) \
|
|
{ \
|
|
MOZ_ASSERT(int32_t(mRefCnt) > 0, "dup release"); \
|
|
if (!mRefCnt.isThreadSafe) \
|
|
NS_ASSERT_OWNINGTHREAD(_class); \
|
|
nsrefcnt count = --mRefCnt; \
|
|
NS_LOG_RELEASE(this, count, #_class); \
|
|
if (count == 0) { \
|
|
if (!mRefCnt.isThreadSafe) \
|
|
NS_ASSERT_OWNINGTHREAD(_class); \
|
|
mRefCnt = 1; /* stabilize */ \
|
|
_destroy; \
|
|
return 0; \
|
|
} \
|
|
return count; \
|
|
}
|
|
|
|
/**
|
|
* Use this macro to implement the Release method for a given <i>_class</i>
|
|
* @param _class The name of the class implementing the method
|
|
*
|
|
* A note on the 'stabilization' of the refcnt to one. At that point,
|
|
* the object's refcount will have gone to zero. The object's
|
|
* destructor may trigger code that attempts to QueryInterface() and
|
|
* Release() 'this' again. Doing so will temporarily increment and
|
|
* decrement the refcount. (Only a logic error would make one try to
|
|
* keep a permanent hold on 'this'.) To prevent re-entering the
|
|
* destructor, we make sure that no balanced refcounting can return
|
|
* the refcount to |0|.
|
|
*/
|
|
#define NS_IMPL_RELEASE(_class) \
|
|
NS_IMPL_RELEASE_WITH_DESTROY(_class, delete (this))
|
|
|
|
/**
|
|
* Use this macro to implement the Release method for a given <i>_class</i>
|
|
* implemented as a wholly owned aggregated object intended to implement
|
|
* interface(s) for its owner
|
|
* @param _class The name of the class implementing the method
|
|
* @param _aggregator the owning/containing object
|
|
*/
|
|
#define NS_IMPL_RELEASE_USING_AGGREGATOR(_class, _aggregator) \
|
|
NS_IMETHODIMP_(MozExternalRefCountType) _class::Release(void) \
|
|
{ \
|
|
NS_PRECONDITION(_aggregator, "null aggregator"); \
|
|
return (_aggregator)->Release(); \
|
|
}
|
|
|
|
|
|
#define NS_IMPL_CYCLE_COLLECTING_ADDREF(_class) \
|
|
NS_IMETHODIMP_(MozExternalRefCountType) _class::AddRef(void) \
|
|
{ \
|
|
MOZ_ASSERT_TYPE_OK_FOR_REFCOUNTING(_class) \
|
|
MOZ_ASSERT(int32_t(mRefCnt) >= 0, "illegal refcnt"); \
|
|
NS_ASSERT_OWNINGTHREAD(_class); \
|
|
nsISupports *base = NS_CYCLE_COLLECTION_CLASSNAME(_class)::Upcast(this); \
|
|
nsrefcnt count = mRefCnt.incr(base); \
|
|
NS_LOG_ADDREF(this, count, #_class, sizeof(*this)); \
|
|
return count; \
|
|
}
|
|
|
|
#define NS_IMPL_CYCLE_COLLECTING_RELEASE_WITH_DESTROY(_class, _destroy) \
|
|
NS_IMETHODIMP_(MozExternalRefCountType) _class::Release(void) \
|
|
{ \
|
|
MOZ_ASSERT(int32_t(mRefCnt) > 0, "dup release"); \
|
|
NS_ASSERT_OWNINGTHREAD(_class); \
|
|
nsISupports *base = NS_CYCLE_COLLECTION_CLASSNAME(_class)::Upcast(this); \
|
|
nsrefcnt count = mRefCnt.decr(base); \
|
|
NS_LOG_RELEASE(this, count, #_class); \
|
|
return count; \
|
|
} \
|
|
NS_IMETHODIMP_(void) _class::DeleteCycleCollectable(void) \
|
|
{ \
|
|
_destroy; \
|
|
}
|
|
|
|
#define NS_IMPL_CYCLE_COLLECTING_RELEASE(_class) \
|
|
NS_IMPL_CYCLE_COLLECTING_RELEASE_WITH_DESTROY(_class, delete (this))
|
|
|
|
// _LAST_RELEASE can be useful when certain resources should be released
|
|
// as soon as we know the object will be deleted.
|
|
#define NS_IMPL_CYCLE_COLLECTING_RELEASE_WITH_LAST_RELEASE(_class, _last) \
|
|
NS_IMETHODIMP_(MozExternalRefCountType) _class::Release(void) \
|
|
{ \
|
|
MOZ_ASSERT(int32_t(mRefCnt) > 0, "dup release"); \
|
|
NS_ASSERT_OWNINGTHREAD(_class); \
|
|
bool shouldDelete = false; \
|
|
nsISupports *base = NS_CYCLE_COLLECTION_CLASSNAME(_class)::Upcast(this); \
|
|
nsrefcnt count = mRefCnt.decr(base, &shouldDelete); \
|
|
NS_LOG_RELEASE(this, count, #_class); \
|
|
if (count == 0) { \
|
|
mRefCnt.incr(base); \
|
|
_last; \
|
|
mRefCnt.decr(base); \
|
|
if (shouldDelete) { \
|
|
mRefCnt.stabilizeForDeletion(); \
|
|
DeleteCycleCollectable(); \
|
|
} \
|
|
} \
|
|
return count; \
|
|
} \
|
|
NS_IMETHODIMP_(void) _class::DeleteCycleCollectable(void) \
|
|
{ \
|
|
delete this; \
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
/**
|
|
* There are two ways of implementing QueryInterface, and we use both:
|
|
*
|
|
* Table-driven QueryInterface uses a static table of IID->offset mappings
|
|
* and a shared helper function. Using it tends to reduce codesize and improve
|
|
* runtime performance (due to processor cache hits).
|
|
*
|
|
* Macro-driven QueryInterface generates a QueryInterface function directly
|
|
* using common macros. This is necessary if special QueryInterface features
|
|
* are being used (such as tearoffs and conditional interfaces).
|
|
*
|
|
* These methods can be combined into a table-driven function call followed
|
|
* by custom code for tearoffs and conditionals.
|
|
*/
|
|
|
|
struct QITableEntry
|
|
{
|
|
const nsIID* iid; // null indicates end of the QITableEntry array
|
|
int32_t offset;
|
|
};
|
|
|
|
nsresult NS_FASTCALL
|
|
NS_TableDrivenQI(void* aThis, REFNSIID aIID,
|
|
void** aInstancePtr, const QITableEntry* aEntries);
|
|
|
|
/**
|
|
* Implement table-driven queryinterface
|
|
*/
|
|
|
|
#define NS_INTERFACE_TABLE_HEAD(_class) \
|
|
NS_IMETHODIMP _class::QueryInterface(REFNSIID aIID, void** aInstancePtr) \
|
|
{ \
|
|
NS_ASSERTION(aInstancePtr, \
|
|
"QueryInterface requires a non-NULL destination!"); \
|
|
nsresult rv = NS_ERROR_FAILURE;
|
|
|
|
#define NS_INTERFACE_TABLE_BEGIN \
|
|
static const QITableEntry table[] = {
|
|
|
|
#define NS_INTERFACE_TABLE_ENTRY(_class, _interface) \
|
|
{ &NS_GET_IID(_interface), \
|
|
int32_t(reinterpret_cast<char*>( \
|
|
static_cast<_interface*>((_class*) 0x1000)) - \
|
|
reinterpret_cast<char*>((_class*) 0x1000)) \
|
|
},
|
|
|
|
#define NS_INTERFACE_TABLE_ENTRY_AMBIGUOUS(_class, _interface, _implClass) \
|
|
{ &NS_GET_IID(_interface), \
|
|
int32_t(reinterpret_cast<char*>( \
|
|
static_cast<_interface*>( \
|
|
static_cast<_implClass*>( \
|
|
(_class*) 0x1000))) - \
|
|
reinterpret_cast<char*>((_class*) 0x1000)) \
|
|
},
|
|
|
|
/*
|
|
* XXX: we want to use mozilla::ArrayLength (or equivalent,
|
|
* MOZ_ARRAY_LENGTH) in this condition, but some versions of GCC don't
|
|
* see that the static_assert condition is actually constant in those
|
|
* cases, even with constexpr support (?).
|
|
*/
|
|
#define NS_INTERFACE_TABLE_END_WITH_PTR(_ptr) \
|
|
{ nullptr, 0 } }; \
|
|
static_assert((sizeof(table)/sizeof(table[0])) > 1, "need at least 1 interface"); \
|
|
rv = NS_TableDrivenQI(static_cast<void*>(_ptr), \
|
|
aIID, aInstancePtr, table);
|
|
|
|
#define NS_INTERFACE_TABLE_END \
|
|
NS_INTERFACE_TABLE_END_WITH_PTR(this)
|
|
|
|
#define NS_INTERFACE_TABLE_TAIL \
|
|
return rv; \
|
|
}
|
|
|
|
#define NS_INTERFACE_TABLE_TAIL_INHERITING(_baseclass) \
|
|
if (NS_SUCCEEDED(rv)) \
|
|
return rv; \
|
|
return _baseclass::QueryInterface(aIID, aInstancePtr); \
|
|
}
|
|
|
|
#define NS_INTERFACE_TABLE_TAIL_USING_AGGREGATOR(_aggregator) \
|
|
if (NS_SUCCEEDED(rv)) \
|
|
return rv; \
|
|
NS_ASSERTION(_aggregator, "null aggregator"); \
|
|
return _aggregator->QueryInterface(aIID, aInstancePtr) \
|
|
}
|
|
|
|
/**
|
|
* This implements query interface with two assumptions: First, the
|
|
* class in question implements nsISupports and its own interface and
|
|
* nothing else. Second, the implementation of the class's primary
|
|
* inheritance chain leads to its own interface.
|
|
*
|
|
* @param _class The name of the class implementing the method
|
|
* @param _classiiddef The name of the #define symbol that defines the IID
|
|
* for the class (e.g. NS_ISUPPORTS_IID)
|
|
*/
|
|
|
|
#define NS_IMPL_QUERY_HEAD(_class) \
|
|
NS_IMETHODIMP _class::QueryInterface(REFNSIID aIID, void** aInstancePtr) \
|
|
{ \
|
|
NS_ASSERTION(aInstancePtr, \
|
|
"QueryInterface requires a non-NULL destination!"); \
|
|
nsISupports* foundInterface;
|
|
|
|
#define NS_IMPL_QUERY_BODY(_interface) \
|
|
if ( aIID.Equals(NS_GET_IID(_interface)) ) \
|
|
foundInterface = static_cast<_interface*>(this); \
|
|
else
|
|
|
|
#define NS_IMPL_QUERY_BODY_CONDITIONAL(_interface, condition) \
|
|
if ( (condition) && aIID.Equals(NS_GET_IID(_interface))) \
|
|
foundInterface = static_cast<_interface*>(this); \
|
|
else
|
|
|
|
#define NS_IMPL_QUERY_BODY_AMBIGUOUS(_interface, _implClass) \
|
|
if ( aIID.Equals(NS_GET_IID(_interface)) ) \
|
|
foundInterface = static_cast<_interface*>( \
|
|
static_cast<_implClass*>(this)); \
|
|
else
|
|
|
|
#define NS_IMPL_QUERY_BODY_AGGREGATED(_interface, _aggregate) \
|
|
if ( aIID.Equals(NS_GET_IID(_interface)) ) \
|
|
foundInterface = static_cast<_interface*>(_aggregate); \
|
|
else
|
|
|
|
#define NS_IMPL_QUERY_TAIL_GUTS \
|
|
foundInterface = 0; \
|
|
nsresult status; \
|
|
if ( !foundInterface ) \
|
|
{ \
|
|
/* nsISupports should be handled by this point. If not, fail. */ \
|
|
MOZ_ASSERT(!aIID.Equals(NS_GET_IID(nsISupports))); \
|
|
status = NS_NOINTERFACE; \
|
|
} \
|
|
else \
|
|
{ \
|
|
NS_ADDREF(foundInterface); \
|
|
status = NS_OK; \
|
|
} \
|
|
*aInstancePtr = foundInterface; \
|
|
return status; \
|
|
}
|
|
|
|
#define NS_IMPL_QUERY_TAIL_INHERITING(_baseclass) \
|
|
foundInterface = 0; \
|
|
nsresult status; \
|
|
if ( !foundInterface ) \
|
|
status = _baseclass::QueryInterface(aIID, (void**)&foundInterface); \
|
|
else \
|
|
{ \
|
|
NS_ADDREF(foundInterface); \
|
|
status = NS_OK; \
|
|
} \
|
|
*aInstancePtr = foundInterface; \
|
|
return status; \
|
|
}
|
|
|
|
#define NS_IMPL_QUERY_TAIL_USING_AGGREGATOR(_aggregator) \
|
|
foundInterface = 0; \
|
|
nsresult status; \
|
|
if ( !foundInterface ) { \
|
|
NS_ASSERTION(_aggregator, "null aggregator"); \
|
|
status = _aggregator->QueryInterface(aIID, (void**)&foundInterface); \
|
|
} else \
|
|
{ \
|
|
NS_ADDREF(foundInterface); \
|
|
status = NS_OK; \
|
|
} \
|
|
*aInstancePtr = foundInterface; \
|
|
return status; \
|
|
}
|
|
|
|
#define NS_IMPL_QUERY_TAIL(_supports_interface) \
|
|
NS_IMPL_QUERY_BODY_AMBIGUOUS(nsISupports, _supports_interface) \
|
|
NS_IMPL_QUERY_TAIL_GUTS
|
|
|
|
|
|
/*
|
|
This is the new scheme. Using this notation now will allow us to switch to
|
|
a table driven mechanism when it's ready. Note the difference between this
|
|
and the (currently) underlying NS_IMPL_QUERY_INTERFACE mechanism. You must
|
|
explicitly mention |nsISupports| when using the interface maps.
|
|
*/
|
|
#define NS_INTERFACE_MAP_BEGIN(_implClass) NS_IMPL_QUERY_HEAD(_implClass)
|
|
#define NS_INTERFACE_MAP_ENTRY(_interface) NS_IMPL_QUERY_BODY(_interface)
|
|
#define NS_INTERFACE_MAP_ENTRY_CONDITIONAL(_interface, condition) \
|
|
NS_IMPL_QUERY_BODY_CONDITIONAL(_interface, condition)
|
|
#define NS_INTERFACE_MAP_ENTRY_AGGREGATED(_interface,_aggregate) \
|
|
NS_IMPL_QUERY_BODY_AGGREGATED(_interface,_aggregate)
|
|
|
|
#define NS_INTERFACE_MAP_END NS_IMPL_QUERY_TAIL_GUTS
|
|
#define NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(_interface, _implClass) \
|
|
NS_IMPL_QUERY_BODY_AMBIGUOUS(_interface, _implClass)
|
|
#define NS_INTERFACE_MAP_END_INHERITING(_baseClass) \
|
|
NS_IMPL_QUERY_TAIL_INHERITING(_baseClass)
|
|
#define NS_INTERFACE_MAP_END_AGGREGATED(_aggregator) \
|
|
NS_IMPL_QUERY_TAIL_USING_AGGREGATOR(_aggregator)
|
|
|
|
#define NS_INTERFACE_TABLE0(_class) \
|
|
NS_INTERFACE_TABLE_BEGIN \
|
|
NS_INTERFACE_TABLE_ENTRY(_class, nsISupports) \
|
|
NS_INTERFACE_TABLE_END
|
|
|
|
#define NS_INTERFACE_TABLE(aClass, ...) \
|
|
MOZ_STATIC_ASSERT_VALID_ARG_COUNT(__VA_ARGS__); \
|
|
NS_INTERFACE_TABLE_BEGIN \
|
|
MOZ_FOR_EACH(NS_INTERFACE_TABLE_ENTRY, (aClass,), (__VA_ARGS__)) \
|
|
NS_INTERFACE_TABLE_ENTRY_AMBIGUOUS(aClass, nsISupports, \
|
|
MOZ_ARG_1(__VA_ARGS__)) \
|
|
NS_INTERFACE_TABLE_END
|
|
|
|
#define NS_IMPL_QUERY_INTERFACE0(_class) \
|
|
NS_INTERFACE_TABLE_HEAD(_class) \
|
|
NS_INTERFACE_TABLE0(_class) \
|
|
NS_INTERFACE_TABLE_TAIL
|
|
|
|
#define NS_IMPL_QUERY_INTERFACE(aClass, ...) \
|
|
NS_INTERFACE_TABLE_HEAD(aClass) \
|
|
NS_INTERFACE_TABLE(aClass, __VA_ARGS__) \
|
|
NS_INTERFACE_TABLE_TAIL
|
|
|
|
/**
|
|
* Declare that you're going to inherit from something that already
|
|
* implements nsISupports, but also implements an additional interface, thus
|
|
* causing an ambiguity. In this case you don't need another mRefCnt, you
|
|
* just need to forward the definitions to the appropriate superclass. E.g.
|
|
*
|
|
* class Bar : public Foo, public nsIBar { // both provide nsISupports
|
|
* public:
|
|
* NS_DECL_ISUPPORTS_INHERITED
|
|
* ...other nsIBar and Bar methods...
|
|
* };
|
|
*/
|
|
#define NS_DECL_ISUPPORTS_INHERITED \
|
|
public: \
|
|
NS_IMETHOD QueryInterface(REFNSIID aIID, \
|
|
void** aInstancePtr); \
|
|
NS_IMETHOD_(MozExternalRefCountType) AddRef(void); \
|
|
NS_IMETHOD_(MozExternalRefCountType) Release(void); \
|
|
|
|
/**
|
|
* These macros can be used in conjunction with NS_DECL_ISUPPORTS_INHERITED
|
|
* to implement the nsISupports methods, forwarding the invocations to a
|
|
* superclass that already implements nsISupports.
|
|
*
|
|
* Note that I didn't make these inlined because they're virtual methods.
|
|
*/
|
|
|
|
#define NS_IMPL_ADDREF_INHERITED(Class, Super) \
|
|
NS_IMETHODIMP_(MozExternalRefCountType) Class::AddRef(void) \
|
|
{ \
|
|
MOZ_ASSERT_TYPE_OK_FOR_REFCOUNTING(Class) \
|
|
nsrefcnt r = Super::AddRef(); \
|
|
NS_LOG_ADDREF(this, r, #Class, sizeof(*this)); \
|
|
return r; \
|
|
}
|
|
|
|
#define NS_IMPL_RELEASE_INHERITED(Class, Super) \
|
|
NS_IMETHODIMP_(MozExternalRefCountType) Class::Release(void) \
|
|
{ \
|
|
nsrefcnt r = Super::Release(); \
|
|
NS_LOG_RELEASE(this, r, #Class); \
|
|
return r; \
|
|
}
|
|
|
|
/**
|
|
* As above but not logging the addref/release; needed if the base
|
|
* class might be aggregated.
|
|
*/
|
|
#define NS_IMPL_NONLOGGING_ADDREF_INHERITED(Class, Super) \
|
|
NS_IMETHODIMP_(MozExternalRefCountType) Class::AddRef(void) \
|
|
{ \
|
|
MOZ_ASSERT_TYPE_OK_FOR_REFCOUNTING(Class) \
|
|
return Super::AddRef(); \
|
|
}
|
|
|
|
#define NS_IMPL_NONLOGGING_RELEASE_INHERITED(Class, Super) \
|
|
NS_IMETHODIMP_(MozExternalRefCountType) Class::Release(void) \
|
|
{ \
|
|
return Super::Release(); \
|
|
}
|
|
|
|
#define NS_INTERFACE_TABLE_INHERITED0(Class) /* Nothing to do here */
|
|
|
|
#define NS_INTERFACE_TABLE_INHERITED(aClass, ...) \
|
|
MOZ_STATIC_ASSERT_VALID_ARG_COUNT(__VA_ARGS__); \
|
|
NS_INTERFACE_TABLE_BEGIN \
|
|
MOZ_FOR_EACH(NS_INTERFACE_TABLE_ENTRY, (aClass,), (__VA_ARGS__)) \
|
|
NS_INTERFACE_TABLE_END
|
|
|
|
#define NS_IMPL_QUERY_INTERFACE_INHERITED0(aClass, aSuper) \
|
|
NS_INTERFACE_TABLE_HEAD(aClass) \
|
|
NS_INTERFACE_TABLE_INHERITED0(aClass) \
|
|
NS_INTERFACE_TABLE_TAIL_INHERITING(aSuper)
|
|
|
|
#define NS_IMPL_QUERY_INTERFACE_INHERITED(aClass, aSuper, ...) \
|
|
NS_INTERFACE_TABLE_HEAD(aClass) \
|
|
NS_INTERFACE_TABLE_INHERITED(aClass, __VA_ARGS__) \
|
|
NS_INTERFACE_TABLE_TAIL_INHERITING(aSuper)
|
|
|
|
/**
|
|
* Convenience macros for implementing all nsISupports methods for
|
|
* a simple class.
|
|
* @param _class The name of the class implementing the method
|
|
* @param _classiiddef The name of the #define symbol that defines the IID
|
|
* for the class (e.g. NS_ISUPPORTS_IID)
|
|
*/
|
|
|
|
#define NS_IMPL_ISUPPORTS0(_class) \
|
|
NS_IMPL_ADDREF(_class) \
|
|
NS_IMPL_RELEASE(_class) \
|
|
NS_IMPL_QUERY_INTERFACE0(_class)
|
|
|
|
#define NS_IMPL_ISUPPORTS(aClass, ...) \
|
|
NS_IMPL_ADDREF(aClass) \
|
|
NS_IMPL_RELEASE(aClass) \
|
|
NS_IMPL_QUERY_INTERFACE(aClass, __VA_ARGS__)
|
|
|
|
#define NS_IMPL_ISUPPORTS_INHERITED0(aClass, aSuper) \
|
|
NS_IMPL_QUERY_INTERFACE_INHERITED0(aClass, aSuper) \
|
|
NS_IMPL_ADDREF_INHERITED(aClass, aSuper) \
|
|
NS_IMPL_RELEASE_INHERITED(aClass, aSuper) \
|
|
|
|
#define NS_IMPL_ISUPPORTS_INHERITED(aClass, aSuper, ...) \
|
|
NS_IMPL_QUERY_INTERFACE_INHERITED(aClass, aSuper, __VA_ARGS__) \
|
|
NS_IMPL_ADDREF_INHERITED(aClass, aSuper) \
|
|
NS_IMPL_RELEASE_INHERITED(aClass, aSuper)
|
|
|
|
/*
|
|
* Macro to glue together a QI that starts with an interface table
|
|
* and segues into an interface map (e.g. it uses singleton classinfo
|
|
* or tearoffs).
|
|
*/
|
|
#define NS_INTERFACE_TABLE_TO_MAP_SEGUE \
|
|
if (rv == NS_OK) return rv; \
|
|
nsISupports* foundInterface;
|
|
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
/**
|
|
*
|
|
* Threadsafe implementations of the ISupports convenience macros.
|
|
*
|
|
* @note These are not available when linking against the standalone glue,
|
|
* because the implementation requires PR_ symbols.
|
|
*/
|
|
#define NS_INTERFACE_MAP_END_THREADSAFE NS_IMPL_QUERY_TAIL_GUTS
|
|
|
|
/**
|
|
* Macro to generate nsIClassInfo methods for classes which do not have
|
|
* corresponding nsIFactory implementations.
|
|
*/
|
|
#define NS_IMPL_THREADSAFE_CI(_class) \
|
|
NS_IMETHODIMP \
|
|
_class::GetInterfaces(uint32_t* _count, nsIID*** _array) \
|
|
{ \
|
|
return NS_CI_INTERFACE_GETTER_NAME(_class)(_count, _array); \
|
|
} \
|
|
\
|
|
NS_IMETHODIMP \
|
|
_class::GetHelperForLanguage(uint32_t _language, nsISupports** _retval) \
|
|
{ \
|
|
*_retval = nullptr; \
|
|
return NS_OK; \
|
|
} \
|
|
\
|
|
NS_IMETHODIMP \
|
|
_class::GetContractID(char** _contractID) \
|
|
{ \
|
|
*_contractID = nullptr; \
|
|
return NS_OK; \
|
|
} \
|
|
\
|
|
NS_IMETHODIMP \
|
|
_class::GetClassDescription(char** _classDescription) \
|
|
{ \
|
|
*_classDescription = nullptr; \
|
|
return NS_OK; \
|
|
} \
|
|
\
|
|
NS_IMETHODIMP \
|
|
_class::GetClassID(nsCID** _classID) \
|
|
{ \
|
|
*_classID = nullptr; \
|
|
return NS_OK; \
|
|
} \
|
|
\
|
|
NS_IMETHODIMP \
|
|
_class::GetImplementationLanguage(uint32_t* _language) \
|
|
{ \
|
|
*_language = nsIProgrammingLanguage::CPLUSPLUS; \
|
|
return NS_OK; \
|
|
} \
|
|
\
|
|
NS_IMETHODIMP \
|
|
_class::GetFlags(uint32_t* _flags) \
|
|
{ \
|
|
*_flags = nsIClassInfo::THREADSAFE; \
|
|
return NS_OK; \
|
|
} \
|
|
\
|
|
NS_IMETHODIMP \
|
|
_class::GetClassIDNoAlloc(nsCID* _classIDNoAlloc) \
|
|
{ \
|
|
return NS_ERROR_NOT_AVAILABLE; \
|
|
}
|
|
|
|
#endif
|