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use clock_gettime() instead of gettimeofday() for isc_itme functions

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This commit is contained in:
Witold Kręcicki
2018-12-09 00:41:21 +01:00
committed by Evan Hunt
parent a85a65f96e
commit 33bf90331b
1 changed files with 20 additions and 75 deletions
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95
lib/isc/unix/time.c
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@@ -36,15 +36,10 @@
#define NS_PER_MS 1000000 /*%< Nanoseconds per millisecond. */
#define US_PER_S 1000000 /*%< Microseconds per second. */
/*
* All of the INSIST()s checks of nanoseconds < NS_PER_S are for
* consistency checking of the type. In lieu of magic numbers, it
* is the best we've got. The check is only performed on functions which
* need an initialized type.
*/
#ifndef ISC_FIX_TV_USEC
#define ISC_FIX_TV_USEC 1
#ifdef CLOCK_REALTIME_COARSE
#define CLOCKSOURCE CLOCK_REALTIME_COARSE
#else
#define CLOCKSOURCE CLOCK_REALTIME
#endif
/*%
@@ -54,32 +49,6 @@
static const isc_interval_t zero_interval = { 0, 0 };
const isc_interval_t * const isc_interval_zero = &zero_interval;
#if ISC_FIX_TV_USEC
static inline void
fix_tv_usec(struct timeval *tv) {
bool fixed = false;
if (tv->tv_usec < 0) {
fixed = true;
do {
tv->tv_sec -= 1;
tv->tv_usec += US_PER_S;
} while (tv->tv_usec < 0);
} else if (tv->tv_usec >= US_PER_S) {
fixed = true;
do {
tv->tv_sec += 1;
tv->tv_usec -= US_PER_S;
} while (tv->tv_usec >=US_PER_S);
}
/*
* Call syslog directly as was are called from the logging functions.
*/
if (fixed)
(void)syslog(LOG_ERR, "gettimeofday returned bad tv_usec: corrected");
}
#endif
void
isc_interval_set(isc_interval_t *i,
unsigned int seconds, unsigned int nanoseconds)
@@ -141,76 +110,52 @@ isc_time_isepoch(const isc_time_t *t) {
isc_result_t
isc_time_now(isc_time_t *t) {
struct timeval tv;
struct timespec ts;
char strbuf[ISC_STRERRORSIZE];
REQUIRE(t != NULL);
if (gettimeofday(&tv, NULL) == -1) {
if (clock_gettime(CLOCKSOURCE, &ts) == -1) {
strerror_r(errno, strbuf, sizeof(strbuf));
UNEXPECTED_ERROR(__FILE__, __LINE__, "%s", strbuf);
return (ISC_R_UNEXPECTED);
}
/*
* Does POSIX guarantee the signedness of tv_sec and tv_usec? If not,
* then this test will generate warnings for platforms on which it is
* unsigned. In any event, the chances of any of these problems
* happening are pretty much zero, but since the libisc library ensures
* certain things to be true ...
*/
#if ISC_FIX_TV_USEC
fix_tv_usec(&tv);
if (tv.tv_sec < 0)
if (ts.tv_sec < 0 || ts.tv_nsec < 0 || ts.tv_nsec >= NS_PER_S) {
return (ISC_R_UNEXPECTED);
#else
if (tv.tv_sec < 0 || tv.tv_usec < 0 || tv.tv_usec >= US_PER_S)
return (ISC_R_UNEXPECTED);
#endif
}
/*
* Ensure the tv_sec value fits in t->seconds.
*/
if (sizeof(tv.tv_sec) > sizeof(t->seconds) &&
((tv.tv_sec | (unsigned int)-1) ^ (unsigned int)-1) != 0U)
if (sizeof(ts.tv_sec) > sizeof(t->seconds) &&
((ts.tv_sec | (unsigned int)-1) ^ (unsigned int)-1) != 0U)
return (ISC_R_RANGE);
t->seconds = tv.tv_sec;
t->nanoseconds = tv.tv_usec * NS_PER_US;
t->seconds = ts.tv_sec;
t->nanoseconds = ts.tv_nsec;
return (ISC_R_SUCCESS);
}
isc_result_t
isc_time_nowplusinterval(isc_time_t *t, const isc_interval_t *i) {
struct timeval tv;
struct timespec ts;
char strbuf[ISC_STRERRORSIZE];
REQUIRE(t != NULL);
REQUIRE(i != NULL);
INSIST(i->nanoseconds < NS_PER_S);
if (gettimeofday(&tv, NULL) == -1) {
if (clock_gettime(CLOCKSOURCE, &ts) == -1) {
strerror_r(errno, strbuf, sizeof(strbuf));
UNEXPECTED_ERROR(__FILE__, __LINE__, "%s", strbuf);
return (ISC_R_UNEXPECTED);
}
/*
* Does POSIX guarantee the signedness of tv_sec and tv_usec? If not,
* then this test will generate warnings for platforms on which it is
* unsigned. In any event, the chances of any of these problems
* happening are pretty much zero, but since the libisc library ensures
* certain things to be true ...
*/
#if ISC_FIX_TV_USEC
fix_tv_usec(&tv);
if (tv.tv_sec < 0)
if (ts.tv_sec < 0 || ts.tv_nsec < 0 || ts.tv_nsec >= NS_PER_S) {
return (ISC_R_UNEXPECTED);
#else
if (tv.tv_sec < 0 || tv.tv_usec < 0 || tv.tv_usec >= US_PER_S)
return (ISC_R_UNEXPECTED);
#endif
}
/*
* Ensure the resulting seconds value fits in the size of an
@@ -218,12 +163,12 @@ isc_time_nowplusinterval(isc_time_t *t, const isc_interval_t *i) {
* note that even if both values == INT_MAX, then when added
* and getting another 1 added below the result is UINT_MAX.)
*/
if ((tv.tv_sec > INT_MAX || i->seconds > INT_MAX) &&
((long long)tv.tv_sec + i->seconds > UINT_MAX))
if ((ts.tv_sec > INT_MAX || i->seconds > INT_MAX) &&
((long long)ts.tv_sec + i->seconds > UINT_MAX))
return (ISC_R_RANGE);
t->seconds = tv.tv_sec + i->seconds;
t->nanoseconds = tv.tv_usec * NS_PER_US + i->nanoseconds;
t->seconds = ts.tv_sec + i->seconds;
t->nanoseconds = ts.tv_nsec + i->nanoseconds;
if (t->nanoseconds >= NS_PER_S) {
t->seconds++;
t->nanoseconds -= NS_PER_S;