summaryrefslogtreecommitdiffstats
path: root/JavaScriptCore/wtf/PassRefPtr.h
diff options
context:
space:
mode:
Diffstat (limited to 'JavaScriptCore/wtf/PassRefPtr.h')
-rw-r--r--JavaScriptCore/wtf/PassRefPtr.h162
1 files changed, 103 insertions, 59 deletions
diff --git a/JavaScriptCore/wtf/PassRefPtr.h b/JavaScriptCore/wtf/PassRefPtr.h
index 9c6e44f..b179cef 100644
--- a/JavaScriptCore/wtf/PassRefPtr.h
+++ b/JavaScriptCore/wtf/PassRefPtr.h
@@ -1,5 +1,5 @@
/*
- * Copyright (C) 2005, 2006, 2007 Apple Inc. All rights reserved.
+ * Copyright (C) 2005, 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
@@ -22,61 +22,67 @@
#define WTF_PassRefPtr_h
#include "AlwaysInline.h"
+#include "NullPtr.h"
namespace WTF {
template<typename T> class RefPtr;
template<typename T> class PassRefPtr;
- template <typename T> PassRefPtr<T> adoptRef(T*);
+ template<typename T> PassRefPtr<T> adoptRef(T*);
+ inline void adopted(const void*) { }
- // Remove inline for WINSCW compiler to prevent the compiler agressively resolving
+#if !COMPILER(WINSCW)
+#if !PLATFORM(QT)
+ #define REF_DEREF_INLINE ALWAYS_INLINE
+#else
+ // Using ALWAYS_INLINE broke the Qt build. This may be a GCC bug.
+ // See https://bugs.webkit.org/show_bug.cgi?id=37253 for details.
+ #define REF_DEREF_INLINE inline
+#endif
+#else
+ // No inlining for WINSCW compiler to prevent the compiler agressively resolving
// T::ref() and T::deref(), which will fail compiling when PassRefPtr<T> is used as
// a class member or function arguments before T is defined.
- template<typename T>
-#if !COMPILER(WINSCW)
- inline
+ #define REF_DEREF_INLINE
#endif
- void refIfNotNull(T* ptr)
+
+ template<typename T> REF_DEREF_INLINE void refIfNotNull(T* ptr)
{
- if (UNLIKELY(ptr != 0))
+ if (LIKELY(ptr != 0))
ptr->ref();
}
- template<typename T>
-#if !COMPILER(WINSCW)
- inline
-#endif
- void derefIfNotNull(T* ptr)
+ template<typename T> REF_DEREF_INLINE void derefIfNotNull(T* ptr)
{
- if (UNLIKELY(ptr != 0))
+ if (LIKELY(ptr != 0))
ptr->deref();
}
+ #undef REF_DEREF_INLINE
+
template<typename T> class PassRefPtr {
public:
- PassRefPtr() : m_ptr(0) {}
+ PassRefPtr() : m_ptr(0) { }
PassRefPtr(T* ptr) : m_ptr(ptr) { refIfNotNull(ptr); }
// It somewhat breaks the type system to allow transfer of ownership out of
// a const PassRefPtr. However, it makes it much easier to work with PassRefPtr
- // temporaries, and we don't really have a need to use real const PassRefPtrs
- // anyway.
- PassRefPtr(const PassRefPtr& o) : m_ptr(o.releaseRef()) {}
- template <typename U> PassRefPtr(const PassRefPtr<U>& o) : m_ptr(o.releaseRef()) { }
+ // temporaries, and we don't have a need to use real const PassRefPtrs anyway.
+ PassRefPtr(const PassRefPtr& o) : m_ptr(o.leakRef()) { }
+ template<typename U> PassRefPtr(const PassRefPtr<U>& o) : m_ptr(o.leakRef()) { }
ALWAYS_INLINE ~PassRefPtr() { derefIfNotNull(m_ptr); }
- template <class U>
- PassRefPtr(const RefPtr<U>& o) : m_ptr(o.get()) { T* ptr = m_ptr; refIfNotNull(ptr); }
+ template<typename U> PassRefPtr(const RefPtr<U>&);
T* get() const { return m_ptr; }
- void clear() { T* ptr = m_ptr; derefIfNotNull(ptr); m_ptr = 0; }
- T* releaseRef() const { T* tmp = m_ptr; m_ptr = 0; return tmp; }
+ void clear();
+ T* leakRef() const WARN_UNUSED_RETURN;
T& operator*() const { return *m_ptr; }
T* operator->() const { return m_ptr; }
-
+
bool operator!() const { return !m_ptr; }
// This conversion operator allows implicit conversion to bool but not to other integer types.
@@ -85,25 +91,31 @@ namespace WTF {
PassRefPtr& operator=(T*);
PassRefPtr& operator=(const PassRefPtr&);
- template <typename U> PassRefPtr& operator=(const PassRefPtr<U>&);
- template <typename U> PassRefPtr& operator=(const RefPtr<U>&);
+ PassRefPtr& operator=(std::nullptr_t) { clear(); return *this; }
+ template<typename U> PassRefPtr& operator=(const PassRefPtr<U>&);
+ template<typename U> PassRefPtr& operator=(const RefPtr<U>&);
friend PassRefPtr adoptRef<T>(T*);
+
+ // FIXME: Remove releaseRef once we change all callers to call leakRef instead.
+ T* releaseRef() const WARN_UNUSED_RETURN { return leakRef(); }
+
private:
// adopting constructor
- PassRefPtr(T* ptr, bool) : m_ptr(ptr) {}
+ PassRefPtr(T* ptr, bool) : m_ptr(ptr) { }
+
mutable T* m_ptr;
};
// NonNullPassRefPtr: Optimized for passing non-null pointers. A NonNullPassRefPtr
- // begins life non-null, and can only become null through a call to releaseRef()
+ // begins life non-null, and can only become null through a call to leakRef()
// or clear().
// FIXME: NonNullPassRefPtr could just inherit from PassRefPtr. However,
// if we use inheritance, GCC's optimizer fails to realize that destruction
// of a released NonNullPassRefPtr is a no-op. So, for now, just copy the
// most important code from PassRefPtr.
- template <typename T> class NonNullPassRefPtr {
+ template<typename T> class NonNullPassRefPtr {
public:
NonNullPassRefPtr(T* ptr)
: m_ptr(ptr)
@@ -112,7 +124,7 @@ namespace WTF {
m_ptr->ref();
}
- template <class U> NonNullPassRefPtr(const RefPtr<U>& o)
+ template<typename U> NonNullPassRefPtr(const RefPtr<U>& o)
: m_ptr(o.get())
{
ASSERT(m_ptr);
@@ -120,19 +132,19 @@ namespace WTF {
}
NonNullPassRefPtr(const NonNullPassRefPtr& o)
- : m_ptr(o.releaseRef())
+ : m_ptr(o.leakRef())
{
ASSERT(m_ptr);
}
- template <class U> NonNullPassRefPtr(const NonNullPassRefPtr<U>& o)
- : m_ptr(o.releaseRef())
+ template<typename U> NonNullPassRefPtr(const NonNullPassRefPtr<U>& o)
+ : m_ptr(o.leakRef())
{
ASSERT(m_ptr);
}
- template <class U> NonNullPassRefPtr(const PassRefPtr<U>& o)
- : m_ptr(o.releaseRef())
+ template<typename U> NonNullPassRefPtr(const PassRefPtr<U>& o)
+ : m_ptr(o.leakRef())
{
ASSERT(m_ptr);
}
@@ -141,17 +153,41 @@ namespace WTF {
T* get() const { return m_ptr; }
- void clear() { derefIfNotNull(m_ptr); m_ptr = 0; }
- T* releaseRef() const { T* tmp = m_ptr; m_ptr = 0; return tmp; }
+ void clear();
+ T* leakRef() const WARN_UNUSED_RETURN { T* tmp = m_ptr; m_ptr = 0; return tmp; }
T& operator*() const { return *m_ptr; }
T* operator->() const { return m_ptr; }
+ // FIXME: Remove releaseRef once we change all callers to call leakRef instead.
+ T* releaseRef() const WARN_UNUSED_RETURN { return leakRef(); }
+
private:
mutable T* m_ptr;
};
- template <typename T> template <typename U> inline PassRefPtr<T>& PassRefPtr<T>::operator=(const RefPtr<U>& o)
+ template<typename T> template<typename U> inline PassRefPtr<T>::PassRefPtr(const RefPtr<U>& o)
+ : m_ptr(o.get())
+ {
+ T* ptr = m_ptr;
+ refIfNotNull(ptr);
+ }
+
+ template<typename T> inline void PassRefPtr<T>::clear()
+ {
+ T* ptr = m_ptr;
+ m_ptr = 0;
+ derefIfNotNull(ptr);
+ }
+
+ template<typename T> inline T* PassRefPtr<T>::leakRef() const
+ {
+ T* ptr = m_ptr;
+ m_ptr = 0;
+ return ptr;
+ }
+
+ template<typename T> template<typename U> inline PassRefPtr<T>& PassRefPtr<T>::operator=(const RefPtr<U>& o)
{
T* optr = o.get();
refIfNotNull(optr);
@@ -161,7 +197,7 @@ namespace WTF {
return *this;
}
- template <typename T> inline PassRefPtr<T>& PassRefPtr<T>::operator=(T* optr)
+ template<typename T> inline PassRefPtr<T>& PassRefPtr<T>::operator=(T* optr)
{
refIfNotNull(optr);
T* ptr = m_ptr;
@@ -170,92 +206,100 @@ namespace WTF {
return *this;
}
- template <typename T> inline PassRefPtr<T>& PassRefPtr<T>::operator=(const PassRefPtr<T>& ref)
+ template<typename T> inline PassRefPtr<T>& PassRefPtr<T>::operator=(const PassRefPtr<T>& ref)
{
T* ptr = m_ptr;
- m_ptr = ref.releaseRef();
+ m_ptr = ref.leakRef();
derefIfNotNull(ptr);
return *this;
}
- template <typename T> template <typename U> inline PassRefPtr<T>& PassRefPtr<T>::operator=(const PassRefPtr<U>& ref)
+ template<typename T> template<typename U> inline PassRefPtr<T>& PassRefPtr<T>::operator=(const PassRefPtr<U>& ref)
{
T* ptr = m_ptr;
- m_ptr = ref.releaseRef();
+ m_ptr = ref.leakRef();
derefIfNotNull(ptr);
return *this;
}
- template <typename T, typename U> inline bool operator==(const PassRefPtr<T>& a, const PassRefPtr<U>& b)
+ template<typename T, typename U> inline bool operator==(const PassRefPtr<T>& a, const PassRefPtr<U>& b)
{
return a.get() == b.get();
}
- template <typename T, typename U> inline bool operator==(const PassRefPtr<T>& a, const RefPtr<U>& b)
+ template<typename T, typename U> inline bool operator==(const PassRefPtr<T>& a, const RefPtr<U>& b)
{
return a.get() == b.get();
}
- template <typename T, typename U> inline bool operator==(const RefPtr<T>& a, const PassRefPtr<U>& b)
+ template<typename T, typename U> inline bool operator==(const RefPtr<T>& a, const PassRefPtr<U>& b)
{
return a.get() == b.get();
}
- template <typename T, typename U> inline bool operator==(const PassRefPtr<T>& a, U* b)
+ template<typename T, typename U> inline bool operator==(const PassRefPtr<T>& a, U* b)
{
return a.get() == b;
}
- template <typename T, typename U> inline bool operator==(T* a, const PassRefPtr<U>& b)
+ template<typename T, typename U> inline bool operator==(T* a, const PassRefPtr<U>& b)
{
return a == b.get();
}
- template <typename T, typename U> inline bool operator!=(const PassRefPtr<T>& a, const PassRefPtr<U>& b)
+ template<typename T, typename U> inline bool operator!=(const PassRefPtr<T>& a, const PassRefPtr<U>& b)
{
return a.get() != b.get();
}
- template <typename T, typename U> inline bool operator!=(const PassRefPtr<T>& a, const RefPtr<U>& b)
+ template<typename T, typename U> inline bool operator!=(const PassRefPtr<T>& a, const RefPtr<U>& b)
{
return a.get() != b.get();
}
- template <typename T, typename U> inline bool operator!=(const RefPtr<T>& a, const PassRefPtr<U>& b)
+ template<typename T, typename U> inline bool operator!=(const RefPtr<T>& a, const PassRefPtr<U>& b)
{
return a.get() != b.get();
}
- template <typename T, typename U> inline bool operator!=(const PassRefPtr<T>& a, U* b)
+ template<typename T, typename U> inline bool operator!=(const PassRefPtr<T>& a, U* b)
{
return a.get() != b;
}
- template <typename T, typename U> inline bool operator!=(T* a, const PassRefPtr<U>& b)
+ template<typename T, typename U> inline bool operator!=(T* a, const PassRefPtr<U>& b)
{
return a != b.get();
}
- template <typename T> inline PassRefPtr<T> adoptRef(T* p)
+ template<typename T> inline PassRefPtr<T> adoptRef(T* p)
{
+ adopted(p);
return PassRefPtr<T>(p, true);
}
- template <typename T, typename U> inline PassRefPtr<T> static_pointer_cast(const PassRefPtr<U>& p)
+ template<typename T, typename U> inline PassRefPtr<T> static_pointer_cast(const PassRefPtr<U>& p)
{
- return adoptRef(static_cast<T*>(p.releaseRef()));
+ return adoptRef(static_cast<T*>(p.leakRef()));
}
- template <typename T, typename U> inline PassRefPtr<T> const_pointer_cast(const PassRefPtr<U>& p)
+ template<typename T, typename U> inline PassRefPtr<T> const_pointer_cast(const PassRefPtr<U>& p)
{
- return adoptRef(const_cast<T*>(p.releaseRef()));
+ return adoptRef(const_cast<T*>(p.leakRef()));
}
- template <typename T> inline T* getPtr(const PassRefPtr<T>& p)
+ template<typename T> inline T* getPtr(const PassRefPtr<T>& p)
{
return p.get();
}
+ template<typename T> inline void NonNullPassRefPtr<T>::clear()
+ {
+ T* ptr = m_ptr;
+ m_ptr = 0;
+ derefIfNotNull(ptr);
+ }
+
} // namespace WTF
using WTF::PassRefPtr;
generated by cgit v1.1 at 2025-11-12 05:00:14 +0000