Gaudi::BootSvcLocator Class Reference

A dual-stage boostrap mechanism is used to ensure an orderly startup of the ApplicationMgr. More...

Inheritance diagram for Gaudi::BootSvcLocator:

Collaboration diagram for Gaudi::BootSvcLocator:

Public Member Functions
const std::list< IService * > &	getServices () const override
bool	existsService (std::string_view name) const override
SmartIF< IService > &	service (const Gaudi::Utils::TypeNameString &typeName, const bool createIf=true) override
	Returns a smart pointer to a service.
Public Member Functions inherited from implements< ISvcLocator >
void const *	i_cast (const InterfaceID &tid) const override
	Implementation of IInterface::i_cast.
StatusCode	queryInterface (const InterfaceID &ti, void **pp) override
	Implementation of IInterface::queryInterface.
std::vector< std::string >	getInterfaceNames () const override
	Implementation of IInterface::getInterfaceNames.
	implements ()=default
	Default constructor.
	implements (const implements &)
	Copy constructor (zero the reference count)
implements &	operator= (const implements &)
	Assignment operator (do not touch the reference count).
unsigned long	addRef () const override
	Reference Interface instance.
unsigned long	release () const override
	Release Interface instance.
unsigned long	refCount () const override
	Current reference count.

Additional Inherited Members
Public Types inherited from implements< ISvcLocator >
using	base_class
	Typedef to this class.
using	extend_interfaces_base
	Typedef to the base of this class.
using	iids
Public Types inherited from extend_interfaces< Interfaces... >
using	ext_iids
	take union of the ext_iids of all Interfaces...
Protected Member Functions inherited from implements< ISvcLocator >
unsigned long	decRef () const override
Protected Attributes inherited from implements< ISvcLocator >
std::atomic_ulong	m_refCount
	Reference counter.

Detailed Description

A dual-stage boostrap mechanism is used to ensure an orderly startup of the ApplicationMgr.

If this function is called before the singleton ApplicationMgr instance exists, a BootstrapAppMgr singleton instance is created. This responds to any subsequent requests for services by returning StatusCode::FAILURE, unless the ApplicationMgr singleton instance has been created in the interim. In this case, the BootstrapAppMgr forwards the request to the ApplicationMgr instance. The motivation for this is to handle static object instances where the constructor attempts to locate services and would otherwise instantiate the ApplicationMgr instance in an unorderly manner. This logic requires that the ApplicationMgr instance is created explicitly.

Definition at line 50 of file Bootstrap.cpp.

Member Function Documentation

existsService()

bool Gaudi::BootSvcLocator::existsService ( std::string_view name ) const

override

Definition at line 192 of file Bootstrap.cpp.

                                                                   {
  return s_appmgrInstance && s_svclocInstance->existsService( name );
}

getServices()

const std::list< IService * > & Gaudi::BootSvcLocator::getServices ( ) const

override

Definition at line 189 of file Bootstrap.cpp.

                                                                 {
  return s_appmgrInstance ? s_svclocInstance->getServices() : s_bootServices;
}

service()

SmartIF< IService > & Gaudi::BootSvcLocator::service ( const Gaudi::Utils::TypeNameString & typeName, const bool createIf = true )

override

Returns a smart pointer to a service.

Definition at line 196 of file Bootstrap.cpp.

                                                                                                               {
  return s_appmgrInstance ? s_svclocInstance->service( typeName, createIf ) : s_bootService;
}

---

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

• GaudiKernel/src/Lib/Bootstrap.cpp