53 lines
1.1 KiB
C++
53 lines
1.1 KiB
C++
#pragma once
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#include "singleton_manager.h"
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class singleton_initliazer;
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template<class T>
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class CORE_API singleton_impl {
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public:
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singleton_impl() {
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instance_ = static_cast<T*>(this);
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}
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static void set(T* instance) {
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instance_ = instance;
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}
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static T* get() {
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return instance_;
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}
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static bool exists() {
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return instance_ != nullptr;
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}
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protected:
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static inline T* instance_ = nullptr;
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};
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class CORE_API singleton {
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public:
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virtual ~singleton() = default;
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virtual void init(singleton_initliazer& initliazer) {}
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virtual void post_init() {}
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virtual void begin_release() {}
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virtual void release() {}
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virtual const char* get_name() = 0;
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};
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template<class T>
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class CORE_API singleton_t : public singleton, public singleton_impl<T> {
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public:
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singleton_t() {
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singleton_manager::get()->add(this);
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}
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};
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#if defined(core_EXPORTS)
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#define DEFINE_SINGLETON_INSTANCE(T) \
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inline T g_##T; \
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extern "C" CORE_API inline T& get_##T() { return g_##T; }
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#else
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#define DEFINE_SINGLETON_INSTANCE(T) \
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extern "C" CORE_API inline T& get_##T();
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#endif
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