icinga2/lib/base/shared.hpp
Yonas Habteab 91c7e60df8 Replace all existing copyright headers with SPDX headers
I've used the following command to replace the original copyright header
lines in a C-style comment block:

```
$ find . \( -type d \( -name '\..*' -o -name third-party -o -name scripts -o -name prefix -o -name malloc -o -name server -o -name docker -o -name build -o -name doc \) -prune \) -o -type f -exec perl -pi -e 's{/\*[^*]*\(\s*c\s*\)\s*(\d{4})\s*Icinga\s+GmbH[^*]*\*/}{// SPDX-FileCopyrightText: \1 Icinga GmbH <https://icinga.com>\n// SPDX-License-Identifier: GPL-2.0-or-later}gi' {} +
```

For files that use shell-style comments (#) like CMakeLists.txt, I've
used this command:

```
$ find . \( -type d \( -name '\..*' -o -name third-party -o -name scripts -o -name prefix -o -name malloc -o -name server -o -name docker -o -name build -o -name doc \) -prune \) -o -type f -exec perl -pi -e 's{#.*\(\s*c\s*\)\s(\d{4})\sIcinga\s+GmbH.*}{# SPDX-FileCopyrightText: \1 Icinga GmbH <https://icinga.com>\n# SPDX-License-Identifier: GPL-2.0-or-later}gi' {} +
```

And for SQL files:

```
$ find . \( -type d \( -name '\..*' -o -name third-party -o -name scripts -o -name prefix -o -name malloc -o -name server -o -name docker -o -name build -o -name doc \) -prune \) -o -type f \( -name '*.sql' \) -exec perl -pi -e 's{--.*\(c\)\s(\d{4})\sIcinga\sGmbH.*}{-- SPDX-FileCopyrightText: \1 Icinga GmbH <https://icinga.com>\n-- SPDX-License-Identifier: GPL-2.0-or-later}gi' {} +
$ find . \( -type d \( -name '\..*' -o -name third-party -o -name scripts -o -name prefix -o -name malloc -o -name server -o -name docker -o -name build -o -name doc \) -prune \) -o -type f \( -name '*.sql' \) -exec perl -pi -e 's{-- Copyright \(c\)\s(\d{4})\sIcinga\s+Development\sTeam.*}{-- SPDX-FileCopyrightText: \1 Icinga GmbH <https://icinga.com>\n-- SPDX-License-Identifier: GPL-2.0-or-later}gi' {} +
```
2026-02-04 14:00:05 +01:00

104 lines
1.9 KiB
C++

// SPDX-FileCopyrightText: 2019 Icinga GmbH <https://icinga.com>
// SPDX-License-Identifier: GPL-2.0-or-later
#ifndef SHARED_H
#define SHARED_H
#include "base/atomic.hpp"
#include "base/intrusive-ptr.hpp"
#include <boost/smart_ptr/intrusive_ptr.hpp>
#include <cstdint>
#include <utility>
namespace icinga
{
template<class T>
class Shared;
template<class T>
inline void intrusive_ptr_add_ref(const Shared<T> *object)
{
object->m_References.fetch_add(1);
}
template<class T>
inline void intrusive_ptr_release(const Shared<T> *object)
{
if (object->m_References.fetch_sub(1) == 1u) {
delete object;
}
}
/**
* Seamless wrapper for any class to create shared pointers of.
* Saves a memory allocation compared to std::shared_ptr.
*
* @ingroup base
*/
template<class T>
class Shared : public T
{
friend void intrusive_ptr_add_ref<>(const Shared<T> *object);
friend void intrusive_ptr_release<>(const Shared<T> *object);
public:
typedef boost::intrusive_ptr<Shared> Ptr;
typedef boost::intrusive_ptr<const Shared> ConstPtr;
/**
* Like std::make_shared, but for this class.
*
* @param args Constructor arguments
*
* @return Ptr
*/
template<class... Args>
static inline
Ptr Make(Args&&... args)
{
return new Shared(std::forward<Args>(args)...);
}
inline Shared(const Shared& origin) : Shared((const T&)origin)
{
}
inline Shared(Shared&& origin) : Shared((T&&)origin)
{
}
template<class... Args>
inline Shared(Args&&... args) : T(std::forward<Args>(args)...), m_References(0)
{
}
inline Shared& operator=(const Shared& rhs)
{
return operator=((const T&)rhs);
}
inline Shared& operator=(Shared&& rhs)
{
return operator=((T&&)rhs);
}
inline Shared& operator=(const T& rhs)
{
T::operator=(rhs);
return *this;
}
inline Shared& operator=(T&& rhs)
{
T::operator=(std::move(rhs));
return *this;
}
private:
mutable Atomic<uint_fast64_t> m_References;
};
}
#endif /* SHARED_H */