/*
- * Copyright (C) 1996-2016 The Squid Software Foundation and contributors
+ * Copyright (C) 1996-2023 The Squid Software Foundation and contributors
*
* Squid software is distributed under GPLv2+ license and includes
* contributions from numerous individuals and organizations.
/* DEBUG: section -- Refcount allocator */
-#ifndef SQUID_REFCOUNT_H_
-#define SQUID_REFCOUNT_H_
+#ifndef SQUID_SRC_BASE_REFCOUNT_H
+#define SQUID_SRC_BASE_REFCOUNT_H
// reference counting requires the Lock API on base classes
#include "base/Lock.h"
#include <iostream>
+#include <utility>
/**
* Template for Reference Counting pointers.
{
public:
- RefCount () : p_ (NULL) {}
+ /// creates a new C object using given C constructor arguments (if any)
+ /// \returns a refcounting pointer to the created object
+ template<typename... Args>
+ inline static auto Make(Args&&... args) {
+ return RefCount<C>(new C(std::forward<Args>(args)...));
+ }
+ RefCount () : p_ (nullptr) {}
RefCount (C const *p) : p_(p) { reference (*this); }
reference (p);
}
-#if __cplusplus >= 201103L
RefCount (RefCount &&p) : p_(std::move(p.p_)) {
- p.p_=NULL;
+ p.p_=nullptr;
+ }
+
+ /// Base::Pointer = Derived::Pointer
+ template <class Other>
+ RefCount(const RefCount<Other> &p): p_(p.getRaw()) {
+ reference(*this);
}
-#endif
RefCount& operator = (const RefCount& p) {
// DO NOT CHANGE THE ORDER HERE!!!
return *this;
}
-#if __cplusplus >= 201103L
RefCount& operator = (RefCount&& p) {
if (this != &p) {
dereference(p.p_);
- p.p_ = NULL;
+ p.p_ = nullptr;
}
return *this;
}
-#endif
+
+ RefCount &operator =(std::nullptr_t) { dereference(); return *this; }
explicit operator bool() const { return p_; }
C * operator-> () const {return const_cast<C *>(p_); }
- C & operator * () const {return *const_cast<C *>(p_); }
-
- C const * getRaw() const {return p_; }
+ C & operator * () const {
+ assert(p_);
+ return *const_cast<C *>(p_);
+ }
- C * getRaw() {return const_cast<C *>(p_); }
+ C * getRaw() const { return const_cast<C *>(p_); }
bool operator == (const RefCount& p) const {
return p.p_ == p_;
return p.p_ != p_;
}
+ template <class Other>
+ bool operator ==(const Other * const p) const
+ {
+ return p == p_;
+ }
+
+ template <class Other>
+ bool operator !=(const Other * const p) const
+ {
+ return p != p_;
+ }
+
private:
- void dereference(C const *newP = NULL) {
+ void dereference(C const *newP = nullptr) {
/* Setting p_ first is important:
* we may be freed ourselves as a result of
* delete p_;
template <class C>
inline std::ostream &operator <<(std::ostream &os, const RefCount<C> &p)
{
- if (p != NULL)
+ if (p != nullptr)
return os << p.getRaw() << '*' << p->LockCount();
else
return os << "NULL";
}
-#endif /* SQUID_REFCOUNT_H_ */
+#endif /* SQUID_SRC_BASE_REFCOUNT_H */