C++ localtime unsafe

inline std::tm localtime_xp(std::time_t timer)
{
    std::tm bt {};
#if defined(__unix__)
    localtime_r(&timer, &bt);
#elif defined(_MSC_VER)
    localtime_s(&bt, &timer);
#else
    static std::mutex mtx;
    std::lock_guard<std::mutex> lock(mtx);
    bt = *std::localtime(&timer);
#endif
    return bt;
}

// default = "YYYY-MM-DD HH:MM:SS"
inline std::string time_stamp(const std::string& fmt = "%F %T")
{
    auto bt = localtime_xp(std::time(0));
    char buf[64];
    return {buf, std::strftime(buf, sizeof(buf), fmt.c_str(), &bt)};
}

Source: stackoverflow.com

Similar codes

3 votes170 views1 answer
What language was c+ written in
C++
1 vote146 views1 answer
How to create a struct in c++
C++
0 vote149 views1 answer
How to define global array in c++ in a scope
C++
0 vote146 views3 answers
Online c++ compiler
C++
0 vote153 views1 answer
Faster solutions
C++
-1 vote143 views1 answer
Permutation c++
C++
1 vote137 views1 answer
Operator overloading
C++
1 vote94 views1 answer
Cheak a number is positive are negative in c ++ in loop
C++
3 votes146 views1 answer
C++ program to reverse an array
C++
6 votes123 views2 answers
Index string c++
C++