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attempting to fix clock overflow

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This commit is contained in:
hyunghwan.chung 2018-11-30 14:18:35 +00:00
parent 1cffec34e8
commit 2cb844b8ce
1 changed files with 17 additions and 5 deletions
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22
moo/lib/std.c
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@ -295,6 +295,9 @@ struct xtn_t
#elif defined(__OS2__)
ULONG tc_last;
ULONG tc_overflow;
#elif defined(__DOS__)
clock_t tc_last;
clock_t tc_overflow;
#endif
#if defined(USE_DEVPOLL)
@ -2147,18 +2150,27 @@ static void vm_gettime (moo_t* moo, moo_ntime_t* now)
#elif defined(__DOS__) && (defined(_INTELC32_) || defined(__WATCOMC__))
clock_t c;
moo_uint64_t bigc;
/* TODO: handle overflow?? */
c = clock ();
now->sec = c / CLOCKS_PER_SEC;
if (c < xtn->tc_last)
{
xtn->tc_overflow++;
bigc= ((moo_uint64_t)MOO_TYPE_MAX(clock_t) * xtn->tc_overflow) + c;
}
else bigc = c;
xtn->tc_last = c;
now->sec = bigc / CLOCKS_PER_SEC;
#if (CLOCKS_PER_SEC == 100)
now->nsec = MOO_MSEC_TO_NSEC((c % CLOCKS_PER_SEC) * 10);
now->nsec = MOO_MSEC_TO_NSEC((bigc % CLOCKS_PER_SEC) * 10);
#elif (CLOCKS_PER_SEC == 1000)
now->nsec = MOO_MSEC_TO_NSEC(c % CLOCKS_PER_SEC);
now->nsec = MOO_MSEC_TO_NSEC(bigc % CLOCKS_PER_SEC);
#elif (CLOCKS_PER_SEC == 1000000L)
now->nsec = MOO_USEC_TO_NSEC(c % CLOCKS_PER_SEC);
now->nsec = MOO_USEC_TO_NSEC(bigc % CLOCKS_PER_SEC);
#elif (CLOCKS_PER_SEC == 1000000000L)
now->nsec = (c % CLOCKS_PER_SEC);
now->nsec = (bigc % CLOCKS_PER_SEC);
#else
# error UNSUPPORTED CLOCKS_PER_SEC
#endif