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implements.h
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1 #ifndef GAUDIKERNEL_IMPLEMENTS_H
2 #define GAUDIKERNEL_IMPLEMENTS_H
3
4 #include "GaudiKernel/IInterface.h"
5 #include <atomic>
6
8 template <typename... Interfaces>
9 struct GAUDI_API implements: virtual public extend_interfaces<Interfaces...> {
11 using base_class = implements<Interfaces...>;
13 using extend_interfaces_base = extend_interfaces<Interfaces...>;
14 using iids = typename extend_interfaces_base::ext_iids;
15
16 public:
18 void *i_cast(const InterfaceID &tid) const override {
19 return Gaudi::iid_cast(tid,iids{},this);
20 }
22 StatusCode queryInterface(const InterfaceID &ti, void** pp) override {
23 if (!pp) return StatusCode::FAILURE;
24 *pp = Gaudi::iid_cast(ti,iids{},this);
25 if (!*pp) return StatusCode::FAILURE; /* cast failed */
26 this->addRef();
27 return StatusCode::SUCCESS;
28 }
30 std::vector<std::string> getInterfaceNames() const override {
31 return Gaudi::getInterfaceNames( iids{} );
32 }
34 implements() = default;
36 implements(const implements& /*other*/) : m_refCount{0} {}
38 implements& operator=(const implements& /*other*/) { return *this; }
40 ~implements() override = default;
41
42 public:
44 unsigned long addRef() override { return ++m_refCount; }
46 unsigned long release() override {
47 /* Avoid to decrement 0 */
48 auto count = ( m_refCount ? --m_refCount : m_refCount.load() );
49 if (count == 0) delete this;
50 return count;
51 }
53 unsigned long refCount() const override { return m_refCount.load(); }
54
55 protected:
57 std::atomic_ulong m_refCount = {0};
58 };
59
60
61 template <typename I1> using implements1 = implements<I1>;
62 template <typename I1,
63 typename I2> using implements2 = implements<I1,I2>;
64 template <typename I1,
65 typename I2,
66 typename I3> using implements3 = implements<I1,I2,I3>;
67 template <typename I1,
68 typename I2,
69 typename I3,
70 typename I4> using implements4 = implements<I1,I2,I3,I4>;
71
72 #endif /* GAUDIKERNEL_IMPLEMENTS_H_ */
StatusCode::SUCCESS
Definition: StatusCode.h:30
implements
Base class used to implement the interfaces.
Definition: implements.h:9
StatusCode::FAILURE
Definition: StatusCode.h:29
extend_interfaces< Interfaces... >::ext_iids
typename Gaudi::interface_list_cat< typename Interfaces::ext_iids... >::type ext_iids
take union of the ext_iids of all Interfaces...
Definition: extend_interfaces.h:14
implements::i_cast
void * i_cast(const InterfaceID &tid) const override
Implementation of IInterface::i_cast.
Definition: implements.h:18
implements::implements
implements(const implements &)
Copy constructor (zero the reference count)
Definition: implements.h:36
implements< IInterface >::iids
typename extend_interfaces_base::ext_iids iids
Definition: implements.h:14
implements::operator=
implements & operator=(const implements &)
Assignment operator (do not touch the reference count).
Definition: implements.h:38
InterfaceID
Interface ID class.
Definition: IInterface.h:30
implements::addRef
unsigned long addRef() override
Reference Interface instance.
Definition: implements.h:44
StatusCode
This class is used for returning status codes from appropriate routines.
Definition: StatusCode.h:26
extend_interfaces
Base class to be used to extend an interface.
Definition: extend_interfaces.h:11
implements::getInterfaceNames
std::vector< std::string > getInterfaceNames() const override
Implementation of IInterface::getInterfaceNames.
Definition: implements.h:30
std::vector< std::string >
implements::refCount
unsigned long refCount() const override
Current reference count.
Definition: implements.h:53
compareOutputFiles.pp
pp
Definition: compareOutputFiles.py:417
Gaudi::getInterfaceNames
std::vector< std::string > getInterfaceNames(Gaudi::interface_list< Is... >)
Definition: IInterface.h:177
implements::queryInterface
StatusCode queryInterface(const InterfaceID &ti, void **pp) override
Implementation of IInterface::queryInterface.
Definition: implements.h:22
Gaudi::iid_cast
void * iid_cast(const InterfaceID &tid, Gaudi::interface_list< Is... >, P *ptr)
Definition: IInterface.h:182
GAUDI_API
#define GAUDI_API
Definition: Kernel.h:107
IInterface.h
implements::release
unsigned long release() override
Release Interface instance.
Definition: implements.h:46