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replace gettimeofday with clock_gettime

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POSIX.1-2008 has marked gettimeofday(2) as obsolete, recommending the
use of clock_gettime(2) instead.

CLOCK_MONOTONIC has been used instead of CLOCK_REALTIME because it is
unaffected by manual changes in the system clock. This makes it better
for our purposes, namely, measuring the difference between two points in
time.

tv_sec has been casted to long in most places since POSIX does not
define the actual type of time_t.
This commit is contained in:
Pranjal Kole 2022-01-15 14:56:13 +05:30
parent 0d649408a0
commit 0da19a81bc
12 changed files with 123 additions and 103 deletions
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13
misc.c
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@ -13,3 +13,16 @@ isword(wchar_t wc, bool spaces_only, const wchar_t *delimiters)
return iswgraph(wc);
}
void
timespec_sub(const struct timespec *a, const struct timespec *b,
struct timespec *res)
{
res->tv_sec = a->tv_sec - b->tv_sec;
res->tv_nsec = a->tv_nsec - b->tv_nsec;
/* tv_nsec may be negative */
if (res->tv_nsec < 0) {
res->tv_sec--;
res->tv_nsec += 1000 * 1000 * 1000;
}
}