mirror of
https://github.com/Icinga/icinga2.git
synced 2025-08-21 01:28:21 +02:00
a49ec1015d
This allows using ref-counted pointers to const objects. Adds a second typedef so that T::ConstPtr can be used similar to how T::Ptr currently is.
59 lines
1.2 KiB
C++
59 lines
1.2 KiB
C++
/* Icinga 2 | (c) 2019 Icinga GmbH | GPLv2+ */
|
|
|
|
#ifndef SHARED_OBJECT_H
|
|
#define SHARED_OBJECT_H
|
|
|
|
#include "base/atomic.hpp"
|
|
#include "base/object.hpp"
|
|
#include <cstdint>
|
|
|
|
namespace icinga
|
|
{
|
|
|
|
class SharedObject;
|
|
|
|
inline void intrusive_ptr_add_ref(const SharedObject *object);
|
|
inline void intrusive_ptr_release(const SharedObject *object);
|
|
|
|
/**
|
|
* Seamless and polymorphistic base for any class to create shared pointers of.
|
|
* Saves a memory allocation compared to std::shared_ptr.
|
|
*
|
|
* @ingroup base
|
|
*/
|
|
class SharedObject
|
|
{
|
|
friend void intrusive_ptr_add_ref(const SharedObject *object);
|
|
friend void intrusive_ptr_release(const SharedObject *object);
|
|
|
|
protected:
|
|
inline SharedObject() : m_References(0)
|
|
{
|
|
}
|
|
|
|
SharedObject(const SharedObject&) = delete;
|
|
SharedObject& operator=(const SharedObject&) = delete;
|
|
|
|
inline virtual
|
|
~SharedObject() = default;
|
|
|
|
private:
|
|
mutable Atomic<uint_fast64_t> m_References;
|
|
};
|
|
|
|
inline void intrusive_ptr_add_ref(const SharedObject *object)
|
|
{
|
|
object->m_References.fetch_add(1);
|
|
}
|
|
|
|
inline void intrusive_ptr_release(const SharedObject *object)
|
|
{
|
|
if (object->m_References.fetch_sub(1) == 1u) {
|
|
delete object;
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
#endif /* SHARED_OBJECT_H */
|