diff options
Diffstat (limited to 'Source/JavaScriptCore/heap/PassWeak.h')
| -rw-r--r-- | Source/JavaScriptCore/heap/PassWeak.h | 203 |
1 files changed, 0 insertions, 203 deletions
diff --git a/Source/JavaScriptCore/heap/PassWeak.h b/Source/JavaScriptCore/heap/PassWeak.h deleted file mode 100644 index 506a63970..000000000 --- a/Source/JavaScriptCore/heap/PassWeak.h +++ /dev/null @@ -1,203 +0,0 @@ -/* - * Copyright (C) 2012, 2013 Apple Inc. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY - * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR - * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR - * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, - * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, - * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR - * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY - * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -#ifndef PassWeak_h -#define PassWeak_h - -#include "JSCell.h" -#include "WeakSetInlines.h" -#include <wtf/Assertions.h> -#include <wtf/NullPtr.h> -#include <wtf/TypeTraits.h> - -namespace JSC { - -template<typename T> class PassWeak; -template<typename T> PassWeak<T> adoptWeak(WeakImpl*); - -template<typename T> class PassWeak { -public: - PassWeak(); - PassWeak(std::nullptr_t); - PassWeak(T*, WeakHandleOwner* = 0, void* context = 0); - - // It somewhat breaks the type system to allow transfer of ownership out of - // a const PassWeak. However, it makes it much easier to work with PassWeak - // temporaries, and we don't have a need to use real const PassWeaks anyway. - PassWeak(const PassWeak&); - template<typename U> PassWeak(const PassWeak<U>&); - - ~PassWeak(); - - T* operator->() const; - T& operator*() const; - T* get() const; - - bool operator!() const; - - // This conversion operator allows implicit conversion to bool but not to other integer types. - typedef void* (PassWeak::*UnspecifiedBoolType); - operator UnspecifiedBoolType*() const; - - WeakImpl* leakImpl() const WARN_UNUSED_RETURN; - -private: - friend PassWeak adoptWeak<T>(WeakImpl*); - explicit PassWeak(WeakImpl*); - - WeakImpl* m_impl; -}; - -template<typename T> inline PassWeak<T>::PassWeak() - : m_impl(0) -{ -} - -template<typename T> inline PassWeak<T>::PassWeak(std::nullptr_t) - : m_impl(0) -{ -} - -template<typename T> inline PassWeak<T>::PassWeak(T* cell, WeakHandleOwner* weakOwner, void* context) - : m_impl(cell ? WeakSet::allocate(cell, weakOwner, context) : 0) -{ -} - -template<typename T> inline PassWeak<T>::PassWeak(const PassWeak& o) - : m_impl(o.leakImpl()) -{ -} - -template<typename T> template<typename U> inline PassWeak<T>::PassWeak(const PassWeak<U>& o) - : m_impl(o.leakImpl()) -{ -} - -template<typename T> inline PassWeak<T>::~PassWeak() -{ - if (!m_impl) - return; - WeakSet::deallocate(m_impl); -} - -template<typename T> inline T* PassWeak<T>::operator->() const -{ - ASSERT(m_impl && m_impl->state() == WeakImpl::Live); - return jsCast<T*>(m_impl->jsValue().asCell()); -} - -template<typename T> inline T& PassWeak<T>::operator*() const -{ - ASSERT(m_impl && m_impl->state() == WeakImpl::Live); - return *jsCast<T*>(m_impl->jsValue().asCell()); -} - -template<typename T> inline T* PassWeak<T>::get() const -{ - if (!m_impl || m_impl->state() != WeakImpl::Live) - return 0; - return jsCast<T*>(m_impl->jsValue().asCell()); -} - -template<typename T> inline bool PassWeak<T>::operator!() const -{ - return !m_impl || m_impl->state() != WeakImpl::Live || !m_impl->jsValue(); -} - -template<typename T> inline PassWeak<T>::operator UnspecifiedBoolType*() const -{ - return reinterpret_cast<UnspecifiedBoolType*>(!!*this); -} - -template<typename T> inline PassWeak<T>::PassWeak(WeakImpl* impl) -: m_impl(impl) -{ -} - -template<typename T> inline WeakImpl* PassWeak<T>::leakImpl() const -{ - WeakImpl* tmp = 0; - std::swap(tmp, const_cast<WeakImpl*&>(m_impl)); - return tmp; -} - -template<typename T> PassWeak<T> inline adoptWeak(WeakImpl* impl) -{ - return PassWeak<T>(impl); -} - -template<typename T, typename U> inline bool operator==(const PassWeak<T>& a, const PassWeak<U>& b) -{ - return a.get() == b.get(); -} - -template<typename T, typename U> inline bool operator==(const PassWeak<T>& a, const Weak<U>& b) -{ - return a.get() == b.get(); -} - -template<typename T, typename U> inline bool operator==(const Weak<T>& a, const PassWeak<U>& b) -{ - return a.get() == b.get(); -} - -template<typename T, typename U> inline bool operator==(const PassWeak<T>& a, U* b) -{ - return a.get() == b; -} - -template<typename T, typename U> inline bool operator==(T* a, const PassWeak<U>& b) -{ - return a == b.get(); -} - -template<typename T, typename U> inline bool operator!=(const PassWeak<T>& a, const PassWeak<U>& b) -{ - return a.get() != b.get(); -} - -template<typename T, typename U> inline bool operator!=(const PassWeak<T>& a, const Weak<U>& b) -{ - return a.get() != b.get(); -} - -template<typename T, typename U> inline bool operator!=(const Weak<T>& a, const PassWeak<U>& b) -{ - return a.get() != b.get(); -} - -template<typename T, typename U> inline bool operator!=(const PassWeak<T>& a, U* b) -{ - return a.get() != b; -} - -template<typename T, typename U> inline bool operator!=(T* a, const PassWeak<U>& b) -{ - return a != b.get(); -} - -} // namespace JSC - -#endif // PassWeak_h |