#Unix itimer windows#

To get in and out of the box through the top: // time_t to sys_secondsĪuto n_seconds = std::chrono::sys_seconds(std::chrono::seconds(N)) Īuto unix_ticks = seconds.time_since_epoch().count() All lwps executing in user mode when the timer expires are inter- rupted into system mode. The counter corresponds to the state of the lwp at the time of the timer tick.

#Unix itimer windows#

Unix time is represented in the C++ standard library as a std:: chrono:: system_clock, so you can convert your Unix timestamps into a sys_time (or use one of the pre-made types like sys_seconds), and then do your work in the world of C++ std:: chrono before converting at the last moment to a Windows FILETIME. Each time the ITIMERREALPROF timer expires, one counter in a set of counters maintained by the system for each lightweight process (lwp) is incremented. auto datetime = winrt::clock::from_file_time(filetime) In PySpark SQL, unixtimestamp () is used to get the current time and to convert the time string in a format yyyy-MM-dd HH:mm:ss to Unix timestamp (in seconds) and fromunixtime () is used to convert the number of seconds from Unix epoch ( 00:00:00 UTC) to a string representation of the timestamp. Of course, once you reach the std:: chrono:: time_point, you can stop and enjoy the scenery before moving onward to your final destination. Time_t unix_time_seconds = winrt::clock::to_time_t(

Time_t unix_time_seconds = winrt::clock::to_time_t(datetime) from FILETIME to Unix timeĪuto datetime = winrt::clock::from_file_time(filetime)

Winrt::clock::from_time_t(unix_time_seconds)) Īnd you can just run everything in reverse to go the other way. from Unix time to FILETIMEĪuto datetime = winrt::clock::from_time_t(unix_time_seconds) įILETIME filetime = winrt::clock::to_file_time(datetime) įILETIME filetime = winrt::clock::to_file_time( And since C++/WinRT represents the Windows Runtime DateTime as a C++ std:: chrono:: time_point object, you have all of the C++ standard library facilities available. The Windows Runtime DateTime has the same internal format as a FILETIME, so you can treat them as basically the same thing, just in different wrapping. The winrt::clock class represents the Windows Runtime DateTime clock, and also provides a number of helpers to convert to and from other formats. Is there a way to do the conversion without having to hard-code these magic numbers? Maybe somebody else has written a conversion that we can use? The Windows documentation offers a helper function to perform the conversion from time_t to FILETIME: It converts the units from seconds to 100ns by multiplying against the magic number 10000000, and then adds the second magic number 116444736000000000. Is there an easy way to convert between them? Unix tracks time in 1s units since January 1, 1970. Windows tracks time in 100ns units since January 1, 1601.