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