86 lines
2.5 KiB
C++
86 lines
2.5 KiB
C++
#pragma once
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#ifndef NULLSOFT_UTILITY_SINGLETON_H
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#define NULLSOFT_UTILITY_SINGLETON_H
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#include <api/service/waservicefactoryi.h>
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#include <api/service/services.h>
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/*
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====== Usage ======
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disp_t: your Dispatchable base class
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implt_t: your implementation class
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SingletonServiceFactory<disp_t, impl_t> myFactory;
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impl_t myImplementation;
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//....
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//during service registration
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myFactory.Register(WASABI_API_SVC, &myImplementation);
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//during service deregistration
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myFactory.Deregister(WASABI_API_SVC, &myImplementation);
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==== Class requirements ====
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your base or implementation class requires the following three static methods
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static FOURCC getServiceType(); // return your type (e.g. WaSvc::UNIQUE)... might already be defined in the dispatchable base class
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static const char *getServiceName(); // return your service name
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static GUID getServiceGuid(); // return your service GUID
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*/
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template <class disp_t, class impl_t>
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class SingletonServiceFactory : public waServiceFactory
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{
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public:
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SingletonServiceFactory() : impl(0)
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{
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}
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~SingletonServiceFactory()
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{
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}
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void Register(api_service *serviceManager, impl_t *new_impl)
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{
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impl=new_impl;
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serviceManager->service_register(this);
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}
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void Deregister(api_service *serviceManager)
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{
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if (impl)
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{
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serviceManager->service_deregister(this);
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impl=0;
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}
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}
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private:
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FOURCC svc_serviceType() { return impl_t::getServiceType(); }
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const char *svc_getServiceName() { return impl_t::getServiceName(); }
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GUID svc_getGuid() { return impl_t::getServiceGuid(); } // GUID per service factory, can be INVALID_GUID
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void *svc_getInterface(int global_lock = TRUE) { return static_cast<disp_t *>(impl); }
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int svc_supportNonLockingGetInterface() { return 1; }
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int svc_releaseInterface(void *ifc) { return 0; }
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const wchar_t *svc_getTestString() { return 0; }
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int svc_notify(int msg, int param1 = 0, int param2 = 0) { return 0; }
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private:
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impl_t *impl;
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protected:
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#define CBCLASS SingletonServiceFactory<disp_t, impl_t>
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START_DISPATCH_INLINE;
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CB(WASERVICEFACTORY_GETSERVICETYPE, svc_serviceType);
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CB(WASERVICEFACTORY_GETSERVICENAME, svc_getServiceName);
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CB(WASERVICEFACTORY_GETGUID, svc_getGuid);
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CB(WASERVICEFACTORY_GETINTERFACE, svc_getInterface);
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CB(WASERVICEFACTORY_SUPPORTNONLOCKINGGETINTERFACE, svc_supportNonLockingGetInterface);
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CB(WASERVICEFACTORY_RELEASEINTERFACE, svc_releaseInterface);
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CB(WASERVICEFACTORY_GETTESTSTRING, svc_getTestString);
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CB(WASERVICEFACTORY_SERVICENOTIFY, svc_notify);
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END_DISPATCH;
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#undef CBCLASS
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};
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#endif |