зеркало из https://github.com/mozilla/gecko-dev.git
1469 строки
72 KiB
C++
1469 строки
72 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 cargo-culting headers */
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#endif
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#include "nsDebug.h"
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#include "nsXPCOM.h"
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#include <atomic>
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#include <type_traits>
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#include "mozilla/Attributes.h"
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#include "mozilla/Assertions.h"
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#include "mozilla/Atomics.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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#include "mozilla/TypeTraits.h"
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#define MOZ_ASSERT_TYPE_OK_FOR_REFCOUNTING(X) \
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static_assert(!mozilla::IsDestructible<X>::value, \
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"Reference-counted class " #X \
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" should not have a public destructor. " \
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"Make this class's destructor non-public");
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inline nsISupports* ToSupports(decltype(nullptr)) { return nullptr; }
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inline nsISupports* ToSupports(nsISupports* aSupports) { return aSupports; }
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////////////////////////////////////////////////////////////////////////////////
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// Macros to help detect thread-safety:
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#ifdef MOZ_THREAD_SAFETY_OWNERSHIP_CHECKS_SUPPORTED
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# include "prthread.h" /* needed for thread-safety checks */
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class nsAutoOwningThread {
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public:
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nsAutoOwningThread();
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// We move the actual assertion checks out-of-line to minimize code bloat,
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// but that means we have to pass a non-literal string to MOZ_CRASH_UNSAFE.
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// To make that more safe, the public interface requires a literal string
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// and passes that to the private interface; we can then be assured that we
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// effectively are passing a literal string to MOZ_CRASH_UNSAFE.
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template <int N>
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void AssertOwnership(const char (&aMsg)[N]) const {
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AssertCurrentThreadOwnsMe(aMsg);
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}
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bool IsCurrentThread() const;
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private:
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void AssertCurrentThreadOwnsMe(const char* aMsg) const;
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void* mThread;
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};
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class nsISerialEventTarget;
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class nsAutoOwningEventTarget {
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public:
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nsAutoOwningEventTarget();
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~nsAutoOwningEventTarget();
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// We move the actual assertion checks out-of-line to minimize code bloat,
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// but that means we have to pass a non-literal string to MOZ_CRASH_UNSAFE.
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// To make that more safe, the public interface requires a literal string
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// and passes that to the private interface; we can then be assured that we
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// effectively are passing a literal string to MOZ_CRASH_UNSAFE.
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template <int N>
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void AssertOwnership(const char (&aMsg)[N]) const {
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AssertCurrentThreadOwnsMe(aMsg);
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}
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bool IsCurrentThread() const;
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private:
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void AssertCurrentThreadOwnsMe(const char* aMsg) const;
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nsISerialEventTarget* mTarget;
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};
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# define NS_DECL_OWNINGTHREAD nsAutoOwningThread _mOwningThread;
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# define NS_DECL_OWNINGEVENTTARGET nsAutoOwningEventTarget _mOwningThread;
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# define NS_ASSERT_OWNINGTHREAD(_class) \
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_mOwningThread.AssertOwnership(#_class " not thread-safe")
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#else // !MOZ_THREAD_SAFETY_OWNERSHIP_CHECKS_SUPPORTED
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# define NS_DECL_OWNINGTHREAD /* nothing */
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# define NS_DECL_OWNINGEVENTTARGET /* nothing */
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# define NS_ASSERT_OWNINGTHREAD(_class) ((void)0)
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#endif // MOZ_THREAD_SAFETY_OWNERSHIP_CHECKS_SUPPORTED
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// Macros for reference-count and constructor logging
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#if defined(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) NS_LogRelease((_p), (_rc), (_type))
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# define MOZ_ASSERT_CLASSNAME(_type) \
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static_assert(std::is_class_v<_type>, \
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"Token '" #_type "' is not a class type.")
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# define MOZ_ASSERT_NOT_ISUPPORTS(_type) \
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static_assert(!std::is_base_of<nsISupports, _type>::value, \
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"nsISupports classes don't need to call MOZ_COUNT_CTOR or " \
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"MOZ_COUNT_DTOR");
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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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MOZ_ASSERT_NOT_ISUPPORTS(_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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MOZ_ASSERT_NOT_ISUPPORTS(_type); \
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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_LOG_CTOR(_ptr, _name, _size) \
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do { \
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NS_LogCtor((void*)_ptr, _name, _size); \
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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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MOZ_ASSERT_NOT_ISUPPORTS(_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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MOZ_ASSERT_NOT_ISUPPORTS(_type); \
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NS_LogDtor((void*)this, #_type, sizeof(*this) - sizeof(_base)); \
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} while (0)
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# define MOZ_LOG_DTOR(_ptr, _name, _size) \
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do { \
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NS_LogDtor((void*)_ptr, _name, _size); \
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} while (0)
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# define MOZ_COUNTED_DEFAULT_CTOR(_type) \
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_type() { MOZ_COUNT_CTOR(_type); }
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# define MOZ_COUNTED_DTOR_META(_type, _prefix, _postfix) \
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_prefix ~_type() _postfix { MOZ_COUNT_DTOR(_type); }
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# define MOZ_COUNTED_DTOR_NESTED(_type, _nestedName) \
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~_type() { MOZ_COUNT_DTOR(_nestedName); }
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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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* Note: The explicit comparison to nullptr is needed to avoid warnings
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* when _p is a nullptr itself. */
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# define NSCAP_LOG_ASSIGNMENT(_c, _p) \
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if (_p != nullptr) NS_LogCOMPtrAddRef((_c), ToSupports(_p))
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# define NSCAP_LOG_RELEASE(_c, _p) \
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if (_p) NS_LogCOMPtrRelease((_c), ToSupports(_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_LOG_CTOR(_ptr, _name, _size)
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# define MOZ_COUNT_DTOR(_type)
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# define MOZ_COUNT_DTOR_INHERITED(_type, _base)
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# define MOZ_LOG_DTOR(_ptr, _name, _size)
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# define MOZ_COUNTED_DEFAULT_CTOR(_type) _type() = default;
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# define MOZ_COUNTED_DTOR_META(_type, _prefix, _postfix) \
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_prefix ~_type() _postfix = default;
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# define MOZ_COUNTED_DTOR_NESTED(_type, _nestedName) ~_type() = default;
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#endif /* NS_BUILD_REFCNT_LOGGING */
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#define MOZ_COUNTED_DTOR(_type) MOZ_COUNTED_DTOR_META(_type, , )
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#define MOZ_COUNTED_DTOR_OVERRIDE(_type) \
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MOZ_COUNTED_DTOR_META(_type, , override)
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#define MOZ_COUNTED_DTOR_FINAL(_type) MOZ_COUNTED_DTOR_META(_type, , final)
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#define MOZ_COUNTED_DTOR_VIRTUAL(_type) MOZ_COUNTED_DTOR_META(_type, virtual, )
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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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public:
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typedef void (*Suspect)(void* aPtr, nsCycleCollectionParticipant* aCp,
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nsCycleCollectingAutoRefCnt* aRefCnt,
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bool* aShouldDelete);
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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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nsCycleCollectingAutoRefCnt(const nsCycleCollectingAutoRefCnt&) = delete;
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void operator=(const nsCycleCollectingAutoRefCnt&) = delete;
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template <Suspect suspect = NS_CycleCollectorSuspect3>
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MOZ_ALWAYS_INLINE uintptr_t incr(nsISupports* aOwner) {
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return incr<suspect>(aOwner, nullptr);
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}
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template <Suspect suspect = NS_CycleCollectorSuspect3>
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MOZ_ALWAYS_INLINE uintptr_t incr(void* aOwner,
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nsCycleCollectionParticipant* aCp) {
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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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suspect(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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// 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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template <Suspect suspect = NS_CycleCollectorSuspect3>
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MOZ_ALWAYS_INLINE uintptr_t decr(nsISupports* aOwner,
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bool* aShouldDelete = nullptr) {
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return decr<suspect>(aOwner, nullptr, aShouldDelete);
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}
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template <Suspect suspect = NS_CycleCollectorSuspect3>
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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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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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suspect(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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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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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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return !!(mRefCntAndFlags & NS_IS_PURPLE);
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}
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MOZ_ALWAYS_INLINE bool IsInPurpleBuffer() const {
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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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return NS_REFCOUNT_VALUE(mRefCntAndFlags);
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}
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MOZ_ALWAYS_INLINE operator nsrefcnt() const { return get(); }
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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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public:
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nsAutoRefCnt() : mValue(0) {}
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explicit nsAutoRefCnt(nsrefcnt aValue) : mValue(aValue) {}
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nsAutoRefCnt(const nsAutoRefCnt&) = delete;
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void operator=(const nsAutoRefCnt&) = delete;
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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) = delete;
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nsrefcnt operator--(int) = delete;
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nsrefcnt mValue;
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};
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namespace mozilla {
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class ThreadSafeAutoRefCnt {
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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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ThreadSafeAutoRefCnt(const ThreadSafeAutoRefCnt&) = delete;
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void operator=(const ThreadSafeAutoRefCnt&) = delete;
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// only support prefix increment/decrement
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MOZ_ALWAYS_INLINE nsrefcnt operator++() {
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// Memory synchronization is not required when incrementing a
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// reference count. The first increment of a reference count on a
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// thread is not important, since the first use of the object on a
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// thread can happen before it. What is important is the transfer
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// of the pointer to that thread, which may happen prior to the
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// first increment on that thread. The necessary memory
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// synchronization is done by the mechanism that transfers the
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// pointer between threads.
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return mValue.fetch_add(1, std::memory_order_relaxed) + 1;
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}
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MOZ_ALWAYS_INLINE nsrefcnt operator--() {
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// Since this may be the last release on this thread, we need
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// release semantics so that prior writes on this thread are visible
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// to the thread that destroys the object when it reads mValue with
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// acquire semantics.
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nsrefcnt result = mValue.fetch_sub(1, std::memory_order_release) - 1;
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if (result == 0) {
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// We're going to destroy the object on this thread, so we need
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// acquire semantics to synchronize with the memory released by
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// the last release on other threads, that is, to ensure that
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// writes prior to that release are now visible on this thread.
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#ifdef MOZ_TSAN
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// TSan doesn't understand std::atomic_thread_fence, so in order
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// to avoid a false positive for every time a refcounted object
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// is deleted, we replace the fence with an atomic operation.
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mValue.load(std::memory_order_acquire);
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#else
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std::atomic_thread_fence(std::memory_order_acquire);
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#endif
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}
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return result;
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}
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MOZ_ALWAYS_INLINE nsrefcnt operator=(nsrefcnt aValue) {
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// Use release semantics since we're not sure what the caller is
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// doing.
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mValue.store(aValue, std::memory_order_release);
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return aValue;
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}
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MOZ_ALWAYS_INLINE operator nsrefcnt() const { return get(); }
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MOZ_ALWAYS_INLINE nsrefcnt get() const {
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// Use acquire semantics since we're not sure what the caller is
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// doing.
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return mValue.load(std::memory_order_acquire);
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}
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static const bool isThreadSafe = true;
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private:
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nsrefcnt operator++(int) = delete;
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nsrefcnt operator--(int) = delete;
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std::atomic<nsrefcnt> mValue;
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};
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} // namespace mozilla
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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, void** aInstancePtr) override; \
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NS_IMETHOD_(MozExternalRefCountType) AddRef(void) override; \
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NS_IMETHOD_(MozExternalRefCountType) Release(void) override; \
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using HasThreadSafeRefCnt = std::false_type; \
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\
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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, void** aInstancePtr) override; \
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NS_IMETHOD_(MozExternalRefCountType) AddRef(void) override; \
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NS_IMETHOD_(MozExternalRefCountType) Release(void) override; \
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using HasThreadSafeRefCnt = std::true_type; \
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\
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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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NS_DECL_CYCLE_COLLECTING_ISUPPORTS_META(override) \
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NS_IMETHOD_(void) DeleteCycleCollectable(void); \
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\
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public:
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#define NS_DECL_CYCLE_COLLECTING_ISUPPORTS_FINAL \
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS_META(final) \
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NS_IMETHOD_(void) DeleteCycleCollectable(void); \
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\
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public:
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#define NS_DECL_CYCLE_COLLECTING_ISUPPORTS_FINAL_DELETECYCLECOLLECTABLE \
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS_META(override) \
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NS_IMETHOD_(void) DeleteCycleCollectable(void) final; \
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\
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public:
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|
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#define NS_DECL_CYCLE_COLLECTING_ISUPPORTS_META(...) \
|
|
public: \
|
|
NS_IMETHOD QueryInterface(REFNSIID aIID, void** aInstancePtr) __VA_ARGS__; \
|
|
NS_IMETHOD_(MozExternalRefCountType) AddRef(void) __VA_ARGS__; \
|
|
NS_IMETHOD_(MozExternalRefCountType) Release(void) __VA_ARGS__; \
|
|
using HasThreadSafeRefCnt = std::false_type; \
|
|
\
|
|
protected: \
|
|
nsCycleCollectingAutoRefCnt mRefCnt; \
|
|
NS_DECL_OWNINGTHREAD \
|
|
public:
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
/*
|
|
* Implementation of AddRef and Release for non-nsISupports (ie "native")
|
|
* cycle-collected classes that use the purple buffer to avoid leaks.
|
|
*/
|
|
|
|
#define NS_IMPL_CC_NATIVE_ADDREF_BODY(_class) \
|
|
MOZ_ASSERT_TYPE_OK_FOR_REFCOUNTING(_class) \
|
|
MOZ_ASSERT(int32_t(mRefCnt) >= 0, "illegal refcnt"); \
|
|
NS_ASSERT_OWNINGTHREAD(_class); \
|
|
nsrefcnt count = \
|
|
mRefCnt.incr(static_cast<void*>(this), \
|
|
_class::NS_CYCLE_COLLECTION_INNERCLASS::GetParticipant()); \
|
|
NS_LOG_ADDREF(this, count, #_class, sizeof(*this)); \
|
|
return count;
|
|
|
|
#define NS_IMPL_CC_MAIN_THREAD_ONLY_NATIVE_ADDREF_BODY(_class) \
|
|
MOZ_ASSERT_TYPE_OK_FOR_REFCOUNTING(_class) \
|
|
MOZ_ASSERT(int32_t(mRefCnt) >= 0, "illegal refcnt"); \
|
|
NS_ASSERT_OWNINGTHREAD(_class); \
|
|
nsrefcnt count = mRefCnt.incr<NS_CycleCollectorSuspectUsingNursery>( \
|
|
static_cast<void*>(this), \
|
|
_class::NS_CYCLE_COLLECTION_INNERCLASS::GetParticipant()); \
|
|
NS_LOG_ADDREF(this, count, #_class, sizeof(*this)); \
|
|
return count;
|
|
|
|
#define NS_IMPL_CC_NATIVE_RELEASE_BODY(_class) \
|
|
MOZ_ASSERT(int32_t(mRefCnt) > 0, "dup release"); \
|
|
NS_ASSERT_OWNINGTHREAD(_class); \
|
|
nsrefcnt count = \
|
|
mRefCnt.decr(static_cast<void*>(this), \
|
|
_class::NS_CYCLE_COLLECTION_INNERCLASS::GetParticipant()); \
|
|
NS_LOG_RELEASE(this, count, #_class); \
|
|
return count;
|
|
|
|
#define NS_IMPL_CC_MAIN_THREAD_ONLY_NATIVE_RELEASE_BODY(_class) \
|
|
MOZ_ASSERT(int32_t(mRefCnt) > 0, "dup release"); \
|
|
NS_ASSERT_OWNINGTHREAD(_class); \
|
|
nsrefcnt count = mRefCnt.decr<NS_CycleCollectorSuspectUsingNursery>( \
|
|
static_cast<void*>(this), \
|
|
_class::NS_CYCLE_COLLECTION_INNERCLASS::GetParticipant()); \
|
|
NS_LOG_RELEASE(this, count, #_class); \
|
|
return count;
|
|
|
|
#define NS_IMPL_CYCLE_COLLECTING_NATIVE_ADDREF(_class) \
|
|
NS_METHOD_(MozExternalRefCountType) _class::AddRef(void) { \
|
|
NS_IMPL_CC_NATIVE_ADDREF_BODY(_class) \
|
|
}
|
|
|
|
#define NS_IMPL_CYCLE_COLLECTING_NATIVE_RELEASE_WITH_LAST_RELEASE(_class, \
|
|
_last) \
|
|
NS_METHOD_(MozExternalRefCountType) _class::Release(void) { \
|
|
MOZ_ASSERT(int32_t(mRefCnt) > 0, "dup release"); \
|
|
NS_ASSERT_OWNINGTHREAD(_class); \
|
|
bool shouldDelete = false; \
|
|
nsrefcnt count = \
|
|
mRefCnt.decr(static_cast<void*>(this), \
|
|
_class::NS_CYCLE_COLLECTION_INNERCLASS::GetParticipant(), \
|
|
&shouldDelete); \
|
|
NS_LOG_RELEASE(this, count, #_class); \
|
|
if (count == 0) { \
|
|
mRefCnt.incr(static_cast<void*>(this), \
|
|
_class::NS_CYCLE_COLLECTION_INNERCLASS::GetParticipant()); \
|
|
_last; \
|
|
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) \
|
|
NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING_META(_class, NS_METHOD_)
|
|
|
|
#define NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING_VIRTUAL(_class) \
|
|
NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING_META(_class, NS_IMETHOD_)
|
|
|
|
#define NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING_INHERITED(_class) \
|
|
NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING_META(_class, NS_METHOD_, \
|
|
override)
|
|
|
|
#define NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING_META(_class, _decl, \
|
|
...) \
|
|
public: \
|
|
_decl(MozExternalRefCountType) AddRef(void) __VA_ARGS__{ \
|
|
NS_IMPL_CC_NATIVE_ADDREF_BODY(_class)} _decl(MozExternalRefCountType) \
|
|
Release(void) __VA_ARGS__ { \
|
|
NS_IMPL_CC_NATIVE_RELEASE_BODY(_class) \
|
|
} \
|
|
using HasThreadSafeRefCnt = std::false_type; \
|
|
\
|
|
protected: \
|
|
nsCycleCollectingAutoRefCnt mRefCnt; \
|
|
NS_DECL_OWNINGTHREAD \
|
|
public:
|
|
|
|
#define NS_INLINE_DECL_MAIN_THREAD_ONLY_CYCLE_COLLECTING_NATIVE_REFCOUNTING( \
|
|
_class) \
|
|
public: \
|
|
NS_METHOD_(MozExternalRefCountType) \
|
|
AddRef(void){NS_IMPL_CC_MAIN_THREAD_ONLY_NATIVE_ADDREF_BODY( \
|
|
_class)} NS_METHOD_(MozExternalRefCountType) Release(void) { \
|
|
NS_IMPL_CC_MAIN_THREAD_ONLY_NATIVE_RELEASE_BODY(_class) \
|
|
} \
|
|
using HasThreadSafeRefCnt = std::false_type; \
|
|
\
|
|
protected: \
|
|
nsCycleCollectingAutoRefCnt mRefCnt; \
|
|
NS_DECL_OWNINGTHREAD \
|
|
public:
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
/**
|
|
* 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
|
|
* @param _destroy A statement that is executed when the object's
|
|
* refcount drops to zero.
|
|
* @param _decl Name of the macro to be used for the return type of the
|
|
* AddRef & Release methods (typically NS_IMETHOD_ or NS_METHOD_).
|
|
* @param optional override Mark the AddRef & Release methods as overrides.
|
|
*/
|
|
#define NS_INLINE_DECL_REFCOUNTING_META(_class, _decl, _destroy, _owning, ...) \
|
|
public: \
|
|
_decl(MozExternalRefCountType) AddRef(void) __VA_ARGS__ { \
|
|
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; \
|
|
} \
|
|
_decl(MozExternalRefCountType) Release(void) __VA_ARGS__ { \
|
|
MOZ_ASSERT(int32_t(mRefCnt) > 0, "dup release"); \
|
|
NS_ASSERT_OWNINGTHREAD(_class); \
|
|
--mRefCnt; \
|
|
NS_LOG_RELEASE(this, mRefCnt, #_class); \
|
|
if (mRefCnt == 0) { \
|
|
mRefCnt = 1; /* stabilize */ \
|
|
_destroy; \
|
|
return 0; \
|
|
} \
|
|
return mRefCnt; \
|
|
} \
|
|
using HasThreadSafeRefCnt = std::false_type; \
|
|
\
|
|
protected: \
|
|
nsAutoRefCnt mRefCnt; \
|
|
_owning public:
|
|
|
|
/**
|
|
* 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
|
|
* @param _destroy A statement that is executed when the object's
|
|
* refcount drops to zero.
|
|
* @param optional override Mark the AddRef & Release methods as overrides.
|
|
*/
|
|
#define NS_INLINE_DECL_REFCOUNTING_WITH_DESTROY(_class, _destroy, ...) \
|
|
NS_INLINE_DECL_REFCOUNTING_META(_class, NS_METHOD_, _destroy, \
|
|
NS_DECL_OWNINGTHREAD, __VA_ARGS__)
|
|
|
|
/**
|
|
* Like NS_INLINE_DECL_REFCOUNTING_WITH_DESTROY with AddRef & Release declared
|
|
* virtual.
|
|
*/
|
|
#define NS_INLINE_DECL_VIRTUAL_REFCOUNTING_WITH_DESTROY(_class, _destroy, ...) \
|
|
NS_INLINE_DECL_REFCOUNTING_META(_class, NS_IMETHOD_, _destroy, \
|
|
NS_DECL_OWNINGTHREAD, __VA_ARGS__)
|
|
|
|
/**
|
|
* 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
|
|
* @param optional override Mark the AddRef & Release methods as overrides.
|
|
*/
|
|
#define NS_INLINE_DECL_REFCOUNTING(_class, ...) \
|
|
NS_INLINE_DECL_REFCOUNTING_WITH_DESTROY(_class, delete (this), __VA_ARGS__)
|
|
|
|
/**
|
|
* Like NS_INLINE_DECL_REFCOUNTING, however the thread safety check will work
|
|
* with any nsISerialEventTarget. This is a workaround until bug 1648031 is
|
|
* properly resolved. Once this is done, it will be possible to use
|
|
* NS_INLINE_DECL_REFCOUNTING under all circumstances.
|
|
*/
|
|
#define NS_INLINE_DECL_REFCOUNTING_ONEVENTTARGET(_class, ...) \
|
|
NS_INLINE_DECL_REFCOUNTING_META(_class, NS_METHOD_, delete (this), \
|
|
NS_DECL_OWNINGEVENTTARGET, __VA_ARGS__)
|
|
|
|
#define NS_INLINE_DECL_THREADSAFE_REFCOUNTING_META(_class, _decl, _destroy, \
|
|
...) \
|
|
public: \
|
|
_decl(MozExternalRefCountType) AddRef(void) __VA_ARGS__ { \
|
|
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; \
|
|
} \
|
|
_decl(MozExternalRefCountType) Release(void) __VA_ARGS__ { \
|
|
MOZ_ASSERT(int32_t(mRefCnt) > 0, "dup release"); \
|
|
nsrefcnt count = --mRefCnt; \
|
|
NS_LOG_RELEASE(this, count, #_class); \
|
|
if (count == 0) { \
|
|
_destroy; \
|
|
return 0; \
|
|
} \
|
|
return count; \
|
|
} \
|
|
using HasThreadSafeRefCnt = std::true_type; \
|
|
\
|
|
protected: \
|
|
::mozilla::ThreadSafeAutoRefCnt mRefCnt; \
|
|
\
|
|
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
|
|
* @param _destroy A statement that is executed when the object's
|
|
* refcount drops to zero.
|
|
* @param optional override Mark the AddRef & Release methods as overrides.
|
|
*/
|
|
#define NS_INLINE_DECL_THREADSAFE_REFCOUNTING_WITH_DESTROY(_class, _destroy, \
|
|
...) \
|
|
NS_INLINE_DECL_THREADSAFE_REFCOUNTING_META(_class, NS_METHOD_, _destroy, \
|
|
__VA_ARGS__)
|
|
|
|
/**
|
|
* Like NS_INLINE_DECL_THREADSAFE_REFCOUNTING_WITH_DESTROY with AddRef & Release
|
|
* declared virtual.
|
|
*/
|
|
#define NS_INLINE_DECL_THREADSAFE_VIRTUAL_REFCOUNTING_WITH_DESTROY( \
|
|
_class, _destroy, ...) \
|
|
NS_INLINE_DECL_THREADSAFE_REFCOUNTING_META(_class, NS_IMETHOD_, _destroy, \
|
|
__VA_ARGS__)
|
|
|
|
/**
|
|
* 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
|
|
* @param optional override Mark the AddRef & Release methods as overrides.
|
|
*/
|
|
#define NS_INLINE_DECL_THREADSAFE_REFCOUNTING(_class, ...) \
|
|
NS_INLINE_DECL_THREADSAFE_REFCOUNTING_WITH_DESTROY(_class, delete (this), \
|
|
__VA_ARGS__)
|
|
|
|
/**
|
|
* Like NS_INLINE_DECL_THREADSAFE_REFCOUNTING with AddRef & Release declared
|
|
* virtual.
|
|
*/
|
|
#define NS_INLINE_DECL_THREADSAFE_VIRTUAL_REFCOUNTING(_class, ...) \
|
|
NS_INLINE_DECL_THREADSAFE_VIRTUAL_REFCOUNTING_WITH_DESTROY( \
|
|
_class, delete (this), __VA_ARGS__)
|
|
|
|
/**
|
|
* Use this macro in interface classes that you want to be able to reference
|
|
* using RefPtr, but don't want to provide a refcounting implemenation. The
|
|
* refcounting implementation can be provided by concrete subclasses that
|
|
* implement the interface.
|
|
*/
|
|
#define NS_INLINE_DECL_PURE_VIRTUAL_REFCOUNTING \
|
|
public: \
|
|
NS_IMETHOD_(MozExternalRefCountType) AddRef(void) = 0; \
|
|
NS_IMETHOD_(MozExternalRefCountType) Release(void) = 0; \
|
|
\
|
|
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
|
|
* @param _name The class name to be passed to XPCOM leak checking
|
|
*/
|
|
#define NS_IMPL_NAMED_ADDREF(_class, _name) \
|
|
NS_IMETHODIMP_(MozExternalRefCountType) _class::AddRef(void) { \
|
|
MOZ_ASSERT_TYPE_OK_FOR_REFCOUNTING(_class) \
|
|
MOZ_ASSERT(int32_t(mRefCnt) >= 0, "illegal refcnt"); \
|
|
MOZ_ASSERT(_name != nullptr, "Must specify a name"); \
|
|
if (!mRefCnt.isThreadSafe) NS_ASSERT_OWNINGTHREAD(_class); \
|
|
nsrefcnt count = ++mRefCnt; \
|
|
NS_LOG_ADDREF(this, count, _name, sizeof(*this)); \
|
|
return count; \
|
|
}
|
|
|
|
/**
|
|
* 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_IMPL_NAMED_ADDREF(_class, #_class)
|
|
|
|
/**
|
|
* 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) \
|
|
MOZ_ASSERT(_aggregator, "null aggregator"); \
|
|
return (_aggregator)->AddRef(); \
|
|
}
|
|
|
|
// We decrement the refcnt before logging the actual release, but when logging
|
|
// named things, accessing the name may not be valid after the refcnt
|
|
// decrement, because the object may have been destroyed on a different thread.
|
|
// Use this macro to ensure that we have a local copy of the name prior to
|
|
// the refcnt decrement. (We use a macro to make absolutely sure the name
|
|
// isn't loaded in builds where it wouldn't be used.)
|
|
#ifdef NS_BUILD_REFCNT_LOGGING
|
|
# define NS_LOAD_NAME_BEFORE_RELEASE(localname, _name) \
|
|
const char* const localname = _name
|
|
#else
|
|
# define NS_LOAD_NAME_BEFORE_RELEASE(localname, _name)
|
|
#endif
|
|
|
|
/**
|
|
* 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 _name The class name to be passed to XPCOM leak checking
|
|
* @param _destroy A statement that is executed when the object's
|
|
* refcount drops to zero.
|
|
*
|
|
* For example,
|
|
*
|
|
* NS_IMPL_RELEASE_WITH_DESTROY(Foo, "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_NAMED_RELEASE_WITH_DESTROY(_class, _name, _destroy) \
|
|
NS_IMETHODIMP_(MozExternalRefCountType) _class::Release(void) { \
|
|
MOZ_ASSERT(int32_t(mRefCnt) > 0, "dup release"); \
|
|
MOZ_ASSERT(_name != nullptr, "Must specify a name"); \
|
|
if (!mRefCnt.isThreadSafe) NS_ASSERT_OWNINGTHREAD(_class); \
|
|
NS_LOAD_NAME_BEFORE_RELEASE(nametmp, _name); \
|
|
nsrefcnt count = --mRefCnt; \
|
|
NS_LOG_RELEASE(this, count, nametmp); \
|
|
if (count == 0) { \
|
|
mRefCnt = 1; /* stabilize */ \
|
|
_destroy; \
|
|
return 0; \
|
|
} \
|
|
return count; \
|
|
}
|
|
|
|
#define NS_IMPL_RELEASE_WITH_DESTROY(_class, _destroy) \
|
|
NS_IMPL_NAMED_RELEASE_WITH_DESTROY(_class, #_class, _destroy)
|
|
|
|
/**
|
|
* 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))
|
|
|
|
#define NS_IMPL_NAMED_RELEASE(_class, _name) \
|
|
NS_IMPL_NAMED_RELEASE_WITH_DESTROY(_class, _name, 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) { \
|
|
MOZ_ASSERT(_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_MAIN_THREAD_ONLY_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<NS_CycleCollectorSuspectUsingNursery>(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; }
|
|
|
|
// This macro is same as NS_IMPL_CYCLE_COLLECTING_RELEASE_WITH_LAST_RELEASE
|
|
// except it doesn't have DeleteCycleCollectable.
|
|
#define NS_IMPL_CYCLE_COLLECTING_RELEASE_WITH_LAST_RELEASE_AND_DESTROY( \
|
|
_class, _last, _destroy) \
|
|
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) { _destroy; }
|
|
|
|
#define NS_IMPL_MAIN_THREAD_ONLY_CYCLE_COLLECTING_RELEASE(_class) \
|
|
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<NS_CycleCollectorSuspectUsingNursery>(base); \
|
|
NS_LOG_RELEASE(this, count, #_class); \
|
|
return count; \
|
|
} \
|
|
NS_IMETHODIMP_(void) _class::DeleteCycleCollectable(void) { 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_MAIN_THREAD_ONLY_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<NS_CycleCollectorSuspectUsingNursery>( \
|
|
base, &shouldDelete); \
|
|
NS_LOG_RELEASE(this, count, #_class); \
|
|
if (count == 0) { \
|
|
mRefCnt.incr<NS_CycleCollectorSuspectUsingNursery>(base); \
|
|
_last; \
|
|
mRefCnt.decr<NS_CycleCollectorSuspectUsingNursery>(base); \
|
|
if (shouldDelete) { \
|
|
mRefCnt.stabilizeForDeletion(); \
|
|
DeleteCycleCollectable(); \
|
|
} \
|
|
} \
|
|
return count; \
|
|
} \
|
|
NS_IMETHODIMP_(void) _class::DeleteCycleCollectable(void) { delete this; }
|
|
|
|
// _WITH_INTERRUPTABLE_LAST_RELEASE can be useful when certain resources
|
|
// should be released as soon as we know the object will be deleted and the
|
|
// instance may be cached for reuse.
|
|
// _last is performed for cleaning up its resources. Then, _maybeInterrupt is
|
|
// tested and when it returns true, this stops deleting the instance.
|
|
// (Note that it's not allowed to grab the instance with nsCOMPtr or RefPtr
|
|
// during _last is performed.)
|
|
// Therefore, when _maybeInterrupt returns true, the instance has to be grabbed
|
|
// by nsCOMPtr or RefPtr.
|
|
#define NS_IMPL_MAIN_THREAD_ONLY_CYCLE_COLLECTING_RELEASE_WITH_INTERRUPTABLE_LAST_RELEASE( \
|
|
_class, _last, _maybeInterrupt) \
|
|
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<NS_CycleCollectorSuspectUsingNursery>( \
|
|
base, &shouldDelete); \
|
|
NS_LOG_RELEASE(this, count, #_class); \
|
|
if (count == 0) { \
|
|
mRefCnt.incr<NS_CycleCollectorSuspectUsingNursery>(base); \
|
|
_last; \
|
|
mRefCnt.decr<NS_CycleCollectorSuspectUsingNursery>(base); \
|
|
if (_maybeInterrupt) { \
|
|
MOZ_ASSERT(mRefCnt.get() > 0); \
|
|
return mRefCnt.get(); \
|
|
} \
|
|
if (shouldDelete) { \
|
|
mRefCnt.stabilizeForDeletion(); \
|
|
DeleteCycleCollectable(); \
|
|
} \
|
|
} \
|
|
return count; \
|
|
} \
|
|
NS_IMETHODIMP_(void) _class::DeleteCycleCollectable(void) { 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_MAIN_THREAD_ONLY_CYCLE_COLLECTING_RELEASE_WITH_LAST_RELEASE_AND_DESTROY( \
|
|
_class, _last, _destroy) \
|
|
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<NS_CycleCollectorSuspectUsingNursery>( \
|
|
base, &shouldDelete); \
|
|
NS_LOG_RELEASE(this, count, #_class); \
|
|
if (count == 0) { \
|
|
mRefCnt.incr<NS_CycleCollectorSuspectUsingNursery>(base); \
|
|
_last; \
|
|
mRefCnt.decr<NS_CycleCollectorSuspectUsingNursery>(base); \
|
|
if (shouldDelete) { \
|
|
mRefCnt.stabilizeForDeletion(); \
|
|
DeleteCycleCollectable(); \
|
|
} \
|
|
} \
|
|
return count; \
|
|
} \
|
|
NS_IMETHODIMP_(void) _class::DeleteCycleCollectable(void) { _destroy; }
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
/**
|
|
* 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
|
|
|
|
// Use this for querying to concrete class types which cannot be unambiguously
|
|
// cast to nsISupports. See also nsQueryObject.h.
|
|
#define NS_IMPL_QUERY_BODY_CONCRETE(_class) \
|
|
if (aIID.Equals(NS_GET_IID(_class))) { \
|
|
*aInstancePtr = do_AddRef(static_cast<_class*>(this)).take(); \
|
|
return NS_OK; \
|
|
} 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_ENTRY_CONCRETE(_class) \
|
|
NS_IMPL_QUERY_BODY_CONCRETE(_class)
|
|
#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, ...) \
|
|
static_assert(MOZ_ARG_COUNT(__VA_ARGS__) > 0, \
|
|
"Need more arguments to NS_INTERFACE_TABLE"); \
|
|
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) override; \
|
|
NS_IMETHOD_(MozExternalRefCountType) AddRef(void) override; \
|
|
NS_IMETHOD_(MozExternalRefCountType) Release(void) override;
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/**
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* These macros can be used in conjunction with NS_DECL_ISUPPORTS_INHERITED
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* to implement the nsISupports methods, forwarding the invocations to a
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* superclass that already implements nsISupports. Don't do anything for
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* subclasses of Runnable because it deals with subclass logging in its own
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* way, using the mName field.
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*
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* Note that I didn't make these inlined because they're virtual methods.
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*/
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namespace mozilla {
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class Runnable;
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} // namespace mozilla
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#define NS_IMPL_ADDREF_INHERITED_GUTS(Class, Super) \
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MOZ_ASSERT_TYPE_OK_FOR_REFCOUNTING(Class) \
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nsrefcnt r = Super::AddRef(); \
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if (!std::is_convertible_v<Class*, mozilla::Runnable*>) { \
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NS_LOG_ADDREF(this, r, #Class, sizeof(*this)); \
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} \
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return r /* Purposefully no trailing semicolon */
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#define NS_IMPL_ADDREF_INHERITED(Class, Super) \
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NS_IMETHODIMP_(MozExternalRefCountType) Class::AddRef(void) { \
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NS_IMPL_ADDREF_INHERITED_GUTS(Class, Super); \
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}
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#define NS_IMPL_RELEASE_INHERITED_GUTS(Class, Super) \
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nsrefcnt r = Super::Release(); \
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if (!std::is_convertible_v<Class*, mozilla::Runnable*>) { \
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NS_LOG_RELEASE(this, r, #Class); \
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} \
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return r /* Purposefully no trailing semicolon */
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#define NS_IMPL_RELEASE_INHERITED(Class, Super) \
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NS_IMETHODIMP_(MozExternalRefCountType) Class::Release(void) { \
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NS_IMPL_RELEASE_INHERITED_GUTS(Class, Super); \
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}
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/**
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* As above but not logging the addref/release; needed if the base
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* class might be aggregated.
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*/
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#define NS_IMPL_NONLOGGING_ADDREF_INHERITED(Class, Super) \
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NS_IMETHODIMP_(MozExternalRefCountType) Class::AddRef(void) { \
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MOZ_ASSERT_TYPE_OK_FOR_REFCOUNTING(Class) \
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return Super::AddRef(); \
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}
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#define NS_IMPL_NONLOGGING_RELEASE_INHERITED(Class, Super) \
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NS_IMETHODIMP_(MozExternalRefCountType) Class::Release(void) { \
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return Super::Release(); \
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}
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#define NS_INTERFACE_TABLE_INHERITED0(Class) /* Nothing to do here */
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#define NS_INTERFACE_TABLE_INHERITED(aClass, ...) \
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static_assert(MOZ_ARG_COUNT(__VA_ARGS__) > 0, \
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"Need more arguments to NS_INTERFACE_TABLE_INHERITED"); \
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NS_INTERFACE_TABLE_BEGIN \
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MOZ_FOR_EACH(NS_INTERFACE_TABLE_ENTRY, (aClass, ), (__VA_ARGS__)) \
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NS_INTERFACE_TABLE_END
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#define NS_IMPL_QUERY_INTERFACE_INHERITED(aClass, aSuper, ...) \
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NS_INTERFACE_TABLE_HEAD(aClass) \
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NS_INTERFACE_TABLE_INHERITED(aClass, __VA_ARGS__) \
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NS_INTERFACE_TABLE_TAIL_INHERITING(aSuper)
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/**
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* Convenience macros for implementing all nsISupports methods for
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* a simple class.
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* @param _class The name of the class implementing the method
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* @param _classiiddef The name of the #define symbol that defines the IID
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* for the class (e.g. NS_ISUPPORTS_IID)
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*/
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#define NS_IMPL_ISUPPORTS0(_class) \
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NS_IMPL_ADDREF(_class) \
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NS_IMPL_RELEASE(_class) \
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NS_IMPL_QUERY_INTERFACE0(_class)
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#define NS_IMPL_ISUPPORTS(aClass, ...) \
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NS_IMPL_ADDREF(aClass) \
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NS_IMPL_RELEASE(aClass) \
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NS_IMPL_QUERY_INTERFACE(aClass, __VA_ARGS__)
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// When possible, prefer NS_INLINE_DECL_REFCOUNTING_INHERITED to
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// NS_IMPL_ISUPPORTS_INHERITED0.
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#define NS_IMPL_ISUPPORTS_INHERITED0(aClass, aSuper) \
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NS_INTERFACE_TABLE_HEAD(aClass) \
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NS_INTERFACE_TABLE_TAIL_INHERITING(aSuper) \
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NS_IMPL_ADDREF_INHERITED(aClass, aSuper) \
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NS_IMPL_RELEASE_INHERITED(aClass, aSuper)
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#define NS_IMPL_ISUPPORTS_INHERITED(aClass, aSuper, ...) \
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NS_IMPL_QUERY_INTERFACE_INHERITED(aClass, aSuper, __VA_ARGS__) \
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NS_IMPL_ADDREF_INHERITED(aClass, aSuper) \
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NS_IMPL_RELEASE_INHERITED(aClass, aSuper)
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/**
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* A macro to declare and implement addref/release for a class that does not
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* need to QI to any interfaces other than the ones its parent class QIs to.
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*/
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#if defined(NS_BUILD_REFCNT_LOGGING)
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# define NS_INLINE_DECL_REFCOUNTING_INHERITED(Class, Super) \
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NS_IMETHOD_(MozExternalRefCountType) AddRef() override { \
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NS_IMPL_ADDREF_INHERITED_GUTS(Class, Super); \
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} \
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NS_IMETHOD_(MozExternalRefCountType) Release() override { \
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NS_IMPL_RELEASE_INHERITED_GUTS(Class, Super); \
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}
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#else // NS_BUILD_REFCNT_LOGGING
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// Defining inheriting versions of functions in the refcount logging case has
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// the side effect of making qualified references to |AddRef| and |Release|
|
|
// on the containing class unambiguous, if |Super| isn't the only base class
|
|
// that provides these members. So if we're building without refcount
|
|
// logging, |using| in |Super|'s declarations to make the names similarly
|
|
// unambiguous.
|
|
# define NS_INLINE_DECL_REFCOUNTING_INHERITED(Class, Super) \
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using Super::AddRef; \
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using Super::Release;
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#endif // NS_BUILD_REFCNT_LOGGING
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|
|
/*
|
|
* 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 \
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if (rv == NS_OK) return rv; \
|
|
nsISupports* foundInterface;
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|
///////////////////////////////////////////////////////////////////////////////
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|
|
/**
|
|
* Macro to generate nsIClassInfo methods for classes which do not have
|
|
* corresponding nsIFactory implementations.
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|
*/
|
|
#define NS_IMPL_THREADSAFE_CI(_class) \
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NS_IMETHODIMP \
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_class::GetInterfaces(nsTArray<nsIID>& _array) { \
|
|
return NS_CI_INTERFACE_GETTER_NAME(_class)(_array); \
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|
} \
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\
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NS_IMETHODIMP \
|
|
_class::GetScriptableHelper(nsIXPCScriptable** _retval) { \
|
|
*_retval = nullptr; \
|
|
return NS_OK; \
|
|
} \
|
|
\
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|
NS_IMETHODIMP \
|
|
_class::GetContractID(nsACString& _contractID) { \
|
|
_contractID.SetIsVoid(true); \
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return NS_OK; \
|
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} \
|
|
\
|
|
NS_IMETHODIMP \
|
|
_class::GetClassDescription(nsACString& _classDescription) { \
|
|
_classDescription.SetIsVoid(true); \
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return NS_OK; \
|
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} \
|
|
\
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NS_IMETHODIMP \
|
|
_class::GetClassID(nsCID** _classID) { \
|
|
*_classID = nullptr; \
|
|
return NS_OK; \
|
|
} \
|
|
\
|
|
NS_IMETHODIMP \
|
|
_class::GetFlags(uint32_t* _flags) { \
|
|
*_flags = nsIClassInfo::THREADSAFE; \
|
|
return NS_OK; \
|
|
} \
|
|
\
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|
NS_IMETHODIMP \
|
|
_class::GetClassIDNoAlloc(nsCID* _classIDNoAlloc) { \
|
|
return NS_ERROR_NOT_AVAILABLE; \
|
|
}
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|
#endif
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