31 lines
1.5 KiB
C
31 lines
1.5 KiB
C
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#pragma once
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#include <iomanip>
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#include <memory>
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#include <mutex>
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// format timestamp
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#define FMT_TIMESTAMP(timestamp) \
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std::fixed << std::setprecision(3) << timestamp;
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#define DISALLOW_COPY_AND_ASSIGN(classname) \
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classname(const classname &) = delete; \
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classname &operator=(const classname &) = delete;
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// adapted form baidu apollo cyber/common/macros.h
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#define DECLARE_SINGLETON(classname) \
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public: \
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static classname *Instance() { \
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static std::unique_ptr<classname> instance{nullptr}; \
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if (!instance) { \
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static std::once_flag flag; \
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std::call_once(flag, \
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[&] { instance.reset(new (std::nothrow) classname()); }); \
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} \
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return instance.get(); \
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} \
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\
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private: \
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classname() = default; \
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DISALLOW_COPY_AND_ASSIGN(classname)
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