AZ::Interface< T > Class Template Reference

#include <Interface.h>

Classes
class	Registrar

Public Types
using	ErrorString = InterfaceErrorString
using	RegisterOutcome = InterfaceRegisterOutcome

Static Public Member Functions
static RegisterOutcome	Register (T *type)
static RegisterOutcome	Unregister (T *type)
static T *	Get ()

Detailed Description

template<typename T>
class AZ::Interface< T >

Interface class for accessing registered singletons across module boundaries. The raw interface pointer is handed to you; the assumption is that the registered system will outlive cached references. A system must register itself with the interface at initialization time by calling Register(); and unregister at shutdown by calling Unregister(). The provided Registrar class will do this for you automatically. Registration will only succeed after the AZ::Environment has been attached and is ready.

Example Usage:

class ISystem
{
public:
    virtual ~ISystem();
 
    virtual void DoSomething() = 0;
};
 
class System
    : public AZ::Interface<ISystem>::Registrar
{
public:
    void DoSomething() override;
};
 
// In client code.
 
// Check that the pointer is valid before use.
if (ISystem* system = AZ::Interface<ISystem>::Get())
{
    system->DoSomething();
}

Member Function Documentation

Get()

template<typename T >

T * AZ::Interface< T >::Get ( )

static

Returns the registered interface pointer, if it exists. This method is thread-safe in that you can call Get from multiple threads. Likewise, calls to Register / Unregister are guarded, but it is highly recommended to restrict Register / Unregister to a dedicated serial code path.

Register()

template<typename T >

auto AZ::Interface< T >::Register ( T * type )

static

Registers an instance pointer to the interface. Only one instance is allowed to register at a time.

Unregister()

template<typename T >

auto AZ::Interface< T >::Unregister ( T * type )

static

Unregisters from the interface. An unregister must occur in the same module as the original Register call; the pointer must match the original call to Register.

---

The documentation for this class was generated from the following file:

• Code/Framework/AzCore/AzCore/Interface/Interface.h