37 lines
978 B
C++
37 lines
978 B
C++
#ifndef HV_SINGLETON_H_
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#define HV_SINGLETON_H_
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#include <mutex>
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#define DISABLE_COPY(Class) \
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Class(const Class&) = delete; \
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Class& operator=(const Class&) = delete;
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#define SINGLETON_DECL(Class) \
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public: \
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static Class* instance(); \
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static void exitInstance(); \
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private: \
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DISABLE_COPY(Class) \
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static Class* s_pInstance; \
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static std::once_flag s_initFlag; \
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static std::mutex s_mutex;
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#define SINGLETON_IMPL(Class) \
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Class* Class::s_pInstance = NULL; \
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std::once_flag Class::s_initFlag; \
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std::mutex Class::s_mutex; \
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Class* Class::instance() { \
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std::call_once(s_initFlag, []() {s_pInstance = new Class;}); \
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return s_pInstance; \
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} \
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void Class::exitInstance() { \
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std::lock_guard<std::mutex> lock(s_mutex); \
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if (s_pInstance) { \
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delete s_pInstance; \
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s_pInstance = nullptr; \
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} \
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}
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#endif // HV_SINGLETON_H_
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