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call C11's timespec_get()

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gettimeofday() is an obsolescent POSIX function which may be removed in
a future version. POSIX recommends using clock_gettime() (also POSIX)
instead, but it isn't available on OS X or Windows (at least with MSVC
and older MinGW versions).

Whereas timespec_get() is part of ISO C11 and mruby uses some small
other C11 features too. It isn't universally available yet either, but
it might be in the future. And Visual C++ 2015 implements it! Since
mruby strives for ISO C and not POSIX compatibility, I think it's a
reasonable choice.

TIME_UTC is used instead of __STDC_VERSION__, because if TIME_UTC is
defined, then most likely timespec_get() is too. This isn't true in case
of  __STDC_VERSION__ (see MSVC).
This commit is contained in:
cremno
2015-03-22 22:52:12 +01:00
parent 17b7745593
commit c47cc0c3bb
1 changed files with 11 additions and 1 deletions
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mrbgems/mruby-time/src/time.c
+11 -1
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@@ -235,7 +235,17 @@ current_mrb_time(mrb_state *mrb)
struct mrb_time *tm;
tm = (struct mrb_time *)mrb_malloc(mrb, sizeof(*tm));
#ifdef NO_GETTIMEOFDAY
#if defined(TIME_UTC)
{
struct timespec ts;
if (timespec_get(&ts, TIME_UTC) == 0) {
mrb_free(mrb, tm);
mrb_raise(mrb, E_RUNTIME_ERROR, "timespec_get() failed for unknown reasons");
}
tm->sec = ts.tv_sec;
tm->usec = ts.tv_nsec / 1000;
}
#elif defined(NO_GETTIMEOFDAY)
{
static time_t last_sec = 0, last_usec = 0;