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c++stltimerresolution

Capturing a time in milliseconds

The following piece of code is used to print the time in the logs:

#define PRINTTIME() struct tm  * tmptime;
time_t     tmpGetTime;
time(&tmpGetTime);
tmptime = localtime(&tmpGetTime);
cout << tmptime->tm_mday << "/" <<tmptime->tm_mon+1 << "/" << 1900+tmptime->tm_year << " " << tmptime->tm_hour << ":" << tmptime->tm_min << ":" << tmptime->tm_sec<<">>";

Is there any way to add milliseconds to this?

Solution

  • To have millisecond precision you have to use system calls specific to your OS.

    In Linux you can use 

    #include <sys/time.h>

timeval tv;
gettimeofday(&tv, 0);
// then convert struct tv to your needed ms precision

    timeval has microsecond precision.

    In Windows you can use:

    #include <Windows.h>

SYSTEMTIME st;
GetSystemTime(&st);
// then convert st to your precision needs

    Of course you can use Boost to do that for you :)