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I am porting some Unix code into Windows Visual Studio 2010. I have run into the following line
gmtime_r(&now, &tm_time);
I found that gmtime_r() is a standard Unix function, but I am hoping to find the Windows equivalent. I found quite a few gmtime functions in time.h, but I am having trouble finding which one is equivalent, if it even exists. Could someone point me in the right direction?
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The gmtime_r() function breaks down the time value, in seconds, and stores it in result. result is a pointer to the tm structure, defined in <time. h>. The value time is usually obtained by a call to the time() function.
APPLICATION USAGE. The gmtime_r() function is thread-safe and returns values in a user-supplied buffer instead of possibly using a static data area that may be overwritten by each call.
gmtime_r() is the thread-safe version of gmtime(). The MSVC implementation of gmtime() is already thread safe, the returned struct tm* is allocated in thread-local storage.
That doesn't make it immune from trouble if the function is called multiple times on the same thread and the returned pointer is stored. You can use gmtime_s() instead. Closest to gmtime_r() but with the arguments reversed ;)
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