summaryrefslogtreecommitdiffstats
path: root/JavaScriptCore/wtf/RetainPtr.h
diff options
context:
space:
mode:
Diffstat (limited to 'JavaScriptCore/wtf/RetainPtr.h')
-rw-r--r--JavaScriptCore/wtf/RetainPtr.h96
1 files changed, 74 insertions, 22 deletions
diff --git a/JavaScriptCore/wtf/RetainPtr.h b/JavaScriptCore/wtf/RetainPtr.h
index 77f25e0..8a14cfe 100644
--- a/JavaScriptCore/wtf/RetainPtr.h
+++ b/JavaScriptCore/wtf/RetainPtr.h
@@ -1,5 +1,5 @@
/*
- * Copyright (C) 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
+ * Copyright (C) 2005, 2006, 2007, 2008, 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
@@ -21,6 +21,8 @@
#ifndef RetainPtr_h
#define RetainPtr_h
+#include "HashTraits.h"
+#include "NullPtr.h"
#include "TypeTraits.h"
#include <algorithm>
#include <CoreFoundation/CoreFoundation.h>
@@ -47,7 +49,7 @@ namespace WTF {
}
#endif
- template <typename T> class RetainPtr {
+ template<typename T> class RetainPtr {
public:
typedef typename RemovePointer<T>::Type ValueType;
typedef ValueType* PtrType;
@@ -60,14 +62,19 @@ namespace WTF {
RetainPtr(const RetainPtr& o) : m_ptr(o.m_ptr) { if (PtrType ptr = m_ptr) CFRetain(ptr); }
+ // Hash table deleted values, which are only constructed and never copied or destroyed.
+ RetainPtr(HashTableDeletedValueType) : m_ptr(hashTableDeletedValue()) { }
+ bool isHashTableDeletedValue() const { return m_ptr == hashTableDeletedValue(); }
+
~RetainPtr() { if (PtrType ptr = m_ptr) CFRelease(ptr); }
- template <typename U> RetainPtr(const RetainPtr<U>& o) : m_ptr(o.get()) { if (PtrType ptr = m_ptr) CFRetain(ptr); }
+ template<typename U> RetainPtr(const RetainPtr<U>&);
PtrType get() const { return m_ptr; }
-
- PtrType releaseRef() { PtrType tmp = m_ptr; m_ptr = 0; return tmp; }
-
+
+ void clear();
+ PtrType leakRef() WARN_UNUSED_RETURN;
+
PtrType operator->() const { return m_ptr; }
bool operator!() const { return !m_ptr; }
@@ -77,20 +84,48 @@ namespace WTF {
operator UnspecifiedBoolType() const { return m_ptr ? &RetainPtr::m_ptr : 0; }
RetainPtr& operator=(const RetainPtr&);
- template <typename U> RetainPtr& operator=(const RetainPtr<U>&);
+ template<typename U> RetainPtr& operator=(const RetainPtr<U>&);
RetainPtr& operator=(PtrType);
- template <typename U> RetainPtr& operator=(U*);
+ template<typename U> RetainPtr& operator=(U*);
+ RetainPtr& operator=(std::nullptr_t) { clear(); return *this; }
void adoptCF(PtrType);
void adoptNS(PtrType);
void swap(RetainPtr&);
+ // FIXME: Remove releaseRef once we change all callers to call leakRef instead.
+ PtrType releaseRef() { return leakRef(); }
+
private:
+ static T* hashTableDeletedValue() { return reinterpret_cast<T*>(-1); }
+
PtrType m_ptr;
};
- template <typename T> inline RetainPtr<T>& RetainPtr<T>::operator=(const RetainPtr<T>& o)
+ template<typename T> template<typename U> inline RetainPtr<T>::RetainPtr(const RetainPtr<U>& o)
+ : m_ptr(o.get())
+ {
+ if (PtrType ptr = m_ptr)
+ CFRetain(ptr);
+ }
+
+ template<typename T> inline void RetainPtr<T>::clear()
+ {
+ if (PtrType ptr = m_ptr) {
+ m_ptr = 0;
+ CFRelease(ptr);
+ }
+ }
+
+ template<typename T> inline typename RetainPtr<T>::PtrType RetainPtr<T>::leakRef()
+ {
+ PtrType ptr = m_ptr;
+ m_ptr = 0;
+ return ptr;
+ }
+
+ template<typename T> inline RetainPtr<T>& RetainPtr<T>::operator=(const RetainPtr<T>& o)
{
PtrType optr = o.get();
if (optr)
@@ -102,7 +137,7 @@ namespace WTF {
return *this;
}
- template <typename T> template <typename U> inline RetainPtr<T>& RetainPtr<T>::operator=(const RetainPtr<U>& o)
+ template<typename T> template<typename U> inline RetainPtr<T>& RetainPtr<T>::operator=(const RetainPtr<U>& o)
{
PtrType optr = o.get();
if (optr)
@@ -114,7 +149,7 @@ namespace WTF {
return *this;
}
- template <typename T> inline RetainPtr<T>& RetainPtr<T>::operator=(PtrType optr)
+ template<typename T> inline RetainPtr<T>& RetainPtr<T>::operator=(PtrType optr)
{
if (optr)
CFRetain(optr);
@@ -125,7 +160,7 @@ namespace WTF {
return *this;
}
- template <typename T> inline void RetainPtr<T>::adoptCF(PtrType optr)
+ template<typename T> inline void RetainPtr<T>::adoptCF(PtrType optr)
{
PtrType ptr = m_ptr;
m_ptr = optr;
@@ -133,7 +168,7 @@ namespace WTF {
CFRelease(ptr);
}
- template <typename T> inline void RetainPtr<T>::adoptNS(PtrType optr)
+ template<typename T> inline void RetainPtr<T>::adoptNS(PtrType optr)
{
adoptNSReference(optr);
@@ -143,7 +178,7 @@ namespace WTF {
CFRelease(ptr);
}
- template <typename T> template <typename U> inline RetainPtr<T>& RetainPtr<T>::operator=(U* optr)
+ template<typename T> template<typename U> inline RetainPtr<T>& RetainPtr<T>::operator=(U* optr)
{
if (optr)
CFRetain(optr);
@@ -154,45 +189,62 @@ namespace WTF {
return *this;
}
- template <class T> inline void RetainPtr<T>::swap(RetainPtr<T>& o)
+ template<typename T> inline void RetainPtr<T>::swap(RetainPtr<T>& o)
{
std::swap(m_ptr, o.m_ptr);
}
- template <class T> inline void swap(RetainPtr<T>& a, RetainPtr<T>& b)
+ template<typename T> inline void swap(RetainPtr<T>& a, RetainPtr<T>& b)
{
a.swap(b);
}
- template <typename T, typename U> inline bool operator==(const RetainPtr<T>& a, const RetainPtr<U>& b)
+ template<typename T, typename U> inline bool operator==(const RetainPtr<T>& a, const RetainPtr<U>& b)
{
return a.get() == b.get();
}
- template <typename T, typename U> inline bool operator==(const RetainPtr<T>& a, U* b)
+ template<typename T, typename U> inline bool operator==(const RetainPtr<T>& a, U* b)
{
return a.get() == b;
}
- template <typename T, typename U> inline bool operator==(T* a, const RetainPtr<U>& b)
+ template<typename T, typename U> inline bool operator==(T* a, const RetainPtr<U>& b)
{
return a == b.get();
}
- template <typename T, typename U> inline bool operator!=(const RetainPtr<T>& a, const RetainPtr<U>& b)
+ template<typename T, typename U> inline bool operator!=(const RetainPtr<T>& a, const RetainPtr<U>& b)
{
return a.get() != b.get();
}
- template <typename T, typename U> inline bool operator!=(const RetainPtr<T>& a, U* b)
+ template<typename T, typename U> inline bool operator!=(const RetainPtr<T>& a, U* b)
{
return a.get() != b;
}
- template <typename T, typename U> inline bool operator!=(T* a, const RetainPtr<U>& b)
+ template<typename T, typename U> inline bool operator!=(T* a, const RetainPtr<U>& b)
{
return a != b.get();
}
+
+ template<typename P> struct HashTraits<RetainPtr<P> > : GenericHashTraits<RetainPtr<P> > {
+ static const bool emptyValueIsZero = true;
+ static void constructDeletedValue(RetainPtr<P>& slot) { new (&slot) RetainPtr<P>(HashTableDeletedValue); }
+ static bool isDeletedValue(const RetainPtr<P>& value) { return value == reinterpret_cast<P*>(-1); }
+ };
+
+ template<typename P> struct PtrHash<RetainPtr<P> > : PtrHash<P*> {
+ using PtrHash<P*>::hash;
+ static unsigned hash(const RetainPtr<P>& key) { return hash(key.get()); }
+ using PtrHash<P*>::equal;
+ static bool equal(const RetainPtr<P>& a, const RetainPtr<P>& b) { return a == b; }
+ static bool equal(P* a, const RetainPtr<P>& b) { return a == b; }
+ static bool equal(const RetainPtr<P>& a, P* b) { return a == b; }
+ };
+
+ template<typename P> struct DefaultHash<RetainPtr<P> > { typedef PtrHash<RetainPtr<P> > Hash; };
} // namespace WTF
generated by cgit v1.1 at 2025-11-12 01:27:00 +0000