Index: Source/WTF/wtf/RefCounted.h |
diff --git a/Source/WTF/wtf/RefCounted.h b/Source/WTF/wtf/RefCounted.h |
deleted file mode 100644 |
index 0504b9ed2818d7ad9fd164fd9c5a256ab6036c9e..0000000000000000000000000000000000000000 |
--- a/Source/WTF/wtf/RefCounted.h |
+++ /dev/null |
@@ -1,253 +0,0 @@ |
-/* |
- * Copyright (C) 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved. |
- * |
- * This library is free software; you can redistribute it and/or |
- * modify it under the terms of the GNU Library General Public |
- * License as published by the Free Software Foundation; either |
- * version 2 of the License, or (at your option) any later version. |
- * |
- * This library is distributed in the hope that it will be useful, |
- * but WITHOUT ANY WARRANTY; without even the implied warranty of |
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
- * Library General Public License for more details. |
- * |
- * You should have received a copy of the GNU Library General Public License |
- * along with this library; see the file COPYING.LIB. If not, write to |
- * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
- * Boston, MA 02110-1301, USA. |
- * |
- */ |
- |
-#ifndef RefCounted_h |
-#define RefCounted_h |
- |
-#include <wtf/Assertions.h> |
-#include <wtf/FastAllocBase.h> |
-#include <wtf/Noncopyable.h> |
-#include <wtf/OwnPtr.h> |
-#include <wtf/ThreadRestrictionVerifier.h> |
-#include <wtf/UnusedParam.h> |
- |
-namespace WTF { |
- |
-#ifdef NDEBUG |
-#define CHECK_REF_COUNTED_LIFECYCLE 0 |
-#else |
-#define CHECK_REF_COUNTED_LIFECYCLE 1 |
-#endif |
- |
-// This base class holds the non-template methods and attributes. |
-// The RefCounted class inherits from it reducing the template bloat |
-// generated by the compiler (technique called template hoisting). |
-class RefCountedBase { |
-public: |
- void ref() |
- { |
-#if CHECK_REF_COUNTED_LIFECYCLE |
- // Start thread verification as soon as the ref count gets to 2. This |
- // heuristic reflects the fact that items are often created on one thread |
- // and then given to another thread to be used. |
- // FIXME: Make this restriction tigher. Especially as we move to more |
- // common methods for sharing items across threads like CrossThreadCopier.h |
- // We should be able to add a "detachFromThread" method to make this explicit. |
- if (m_refCount == 1) |
- m_verifier.setShared(true); |
- // If this assert fires, it either indicates a thread safety issue or |
- // that the verification needs to change. See ThreadRestrictionVerifier for |
- // the different modes. |
- ASSERT(m_verifier.isSafeToUse()); |
- ASSERT(!m_deletionHasBegun); |
- ASSERT(!m_adoptionIsRequired); |
-#endif |
- ++m_refCount; |
- } |
- |
- bool hasOneRef() const |
- { |
-#if CHECK_REF_COUNTED_LIFECYCLE |
- ASSERT(m_verifier.isSafeToUse()); |
- ASSERT(!m_deletionHasBegun); |
-#endif |
- return m_refCount == 1; |
- } |
- |
- int refCount() const |
- { |
-#if CHECK_REF_COUNTED_LIFECYCLE |
- ASSERT(m_verifier.isSafeToUse()); |
-#endif |
- return m_refCount; |
- } |
- |
- void setMutexForVerifier(Mutex&); |
- |
-#if HAVE(DISPATCH_H) |
- void setDispatchQueueForVerifier(dispatch_queue_t); |
-#endif |
- |
- // Turns off verification. Use of this method is discouraged (instead extend |
- // ThreadRestrictionVerifier to verify your case). |
- // NB. It is necessary to call this in the constructor of many objects in |
- // JavaScriptCore, because JavaScriptCore objects may be used from multiple |
- // threads even if the reference counting is done in a racy manner. This is |
- // because a JSC instance may be used from multiple threads so long as all |
- // accesses into that instance are protected by a per-instance lock. It would |
- // be absolutely wrong to prohibit this pattern, and it would be a disastrous |
- // regression to require that the objects within that instance use a thread- |
- // safe version of reference counting. |
- void turnOffVerifier() |
- { |
-#if CHECK_REF_COUNTED_LIFECYCLE |
- m_verifier.turnOffVerification(); |
-#endif |
- } |
- |
- void relaxAdoptionRequirement() |
- { |
-#if CHECK_REF_COUNTED_LIFECYCLE |
- ASSERT(!m_deletionHasBegun); |
- ASSERT(m_adoptionIsRequired); |
- m_adoptionIsRequired = false; |
-#endif |
- } |
- |
- // Helper for generating JIT code. Please do not use for non-JIT purposes. |
- const int* addressOfCount() const |
- { |
- return &m_refCount; |
- } |
- |
-protected: |
- RefCountedBase() |
- : m_refCount(1) |
-#if CHECK_REF_COUNTED_LIFECYCLE |
- , m_deletionHasBegun(false) |
- , m_adoptionIsRequired(true) |
-#endif |
- { |
- } |
- |
- ~RefCountedBase() |
- { |
-#if CHECK_REF_COUNTED_LIFECYCLE |
- ASSERT(m_deletionHasBegun); |
- ASSERT(!m_adoptionIsRequired); |
-#endif |
- } |
- |
- // Returns whether the pointer should be freed or not. |
- bool derefBase() |
- { |
-#if CHECK_REF_COUNTED_LIFECYCLE |
- ASSERT(m_verifier.isSafeToUse()); |
- ASSERT(!m_deletionHasBegun); |
- ASSERT(!m_adoptionIsRequired); |
-#endif |
- |
- ASSERT(m_refCount > 0); |
- if (m_refCount == 1) { |
-#if CHECK_REF_COUNTED_LIFECYCLE |
- m_deletionHasBegun = true; |
-#endif |
- return true; |
- } |
- |
- --m_refCount; |
-#if CHECK_REF_COUNTED_LIFECYCLE |
- // Stop thread verification when the ref goes to 1 because it |
- // is safe to be passed to another thread at this point. |
- if (m_refCount == 1) |
- m_verifier.setShared(false); |
-#endif |
- return false; |
- } |
- |
-#if CHECK_REF_COUNTED_LIFECYCLE |
- bool deletionHasBegun() const |
- { |
- return m_deletionHasBegun; |
- } |
-#endif |
- |
-private: |
- |
-#if CHECK_REF_COUNTED_LIFECYCLE |
- friend void adopted(RefCountedBase*); |
-#endif |
- |
- int m_refCount; |
-#if CHECK_REF_COUNTED_LIFECYCLE |
- bool m_deletionHasBegun; |
- bool m_adoptionIsRequired; |
- ThreadRestrictionVerifier m_verifier; |
-#endif |
-}; |
- |
-#if CHECK_REF_COUNTED_LIFECYCLE |
-inline void adopted(RefCountedBase* object) |
-{ |
- if (!object) |
- return; |
- ASSERT(!object->m_deletionHasBegun); |
- object->m_adoptionIsRequired = false; |
-} |
-#endif |
- |
-template<typename T> class RefCounted : public RefCountedBase { |
- WTF_MAKE_NONCOPYABLE(RefCounted); WTF_MAKE_FAST_ALLOCATED; |
-public: |
- void deref() |
- { |
- if (derefBase()) |
- delete static_cast<T*>(this); |
- } |
- |
-protected: |
- RefCounted() { } |
- ~RefCounted() |
- { |
- } |
-}; |
- |
-template<typename T> class RefCountedCustomAllocated : public RefCountedBase { |
- WTF_MAKE_NONCOPYABLE(RefCountedCustomAllocated); |
- |
-public: |
- void deref() |
- { |
- if (derefBase()) |
- delete static_cast<T*>(this); |
- } |
- |
-protected: |
- ~RefCountedCustomAllocated() |
- { |
- } |
-}; |
- |
-#if CHECK_REF_COUNTED_LIFECYCLE |
-inline void RefCountedBase::setMutexForVerifier(Mutex& mutex) |
-{ |
- m_verifier.setMutexMode(mutex); |
-} |
-#else |
-inline void RefCountedBase::setMutexForVerifier(Mutex&) { } |
-#endif |
- |
-#if HAVE(DISPATCH_H) |
-#if CHECK_REF_COUNTED_LIFECYCLE |
-inline void RefCountedBase::setDispatchQueueForVerifier(dispatch_queue_t queue) |
-{ |
- m_verifier.setDispatchQueueMode(queue); |
-} |
-#else |
-inline void RefCountedBase::setDispatchQueueForVerifier(dispatch_queue_t) { } |
-#endif |
-#endif // HAVE(DISPATCH_H) |
- |
-} // namespace WTF |
- |
-using WTF::RefCounted; |
-using WTF::RefCountedCustomAllocated; |
- |
-#endif // RefCounted_h |