+/* Licensed under BSD-MIT - see LICENSE file for details */
#include <ccan/time/time.h>
#include <stdlib.h>
#include <assert.h>
-struct timeval time_now(void)
+#if !HAVE_CLOCK_GETTIME && !HAVE_CLOCK_GETTIME_IN_LIBRT
+#include <sys/time.h>
+
+struct timespec time_now(void)
{
struct timeval now;
+ struct timespec ret;
gettimeofday(&now, NULL);
- return now;
+ ret.tv_sec = now.tv_sec;
+ ret.tv_nsec = now.tv_usec * 1000;
+ return ret;
+}
+#else
+#include <time.h>
+struct timespec time_now(void)
+{
+ struct timespec ret;
+ clock_gettime(CLOCK_REALTIME, &ret);
+ return ret;
}
+#endif /* HAVE_CLOCK_GETTIME || HAVE_CLOCK_GETTIME_IN_LIBRT */
-bool time_greater(struct timeval a, struct timeval b)
+bool time_greater(struct timespec a, struct timespec b)
{
if (a.tv_sec > b.tv_sec)
return true;
else if (a.tv_sec < b.tv_sec)
return false;
- return a.tv_usec > b.tv_usec;
+ return a.tv_nsec > b.tv_nsec;
}
-bool time_less(struct timeval a, struct timeval b)
+bool time_less(struct timespec a, struct timespec b)
{
if (a.tv_sec < b.tv_sec)
return true;
else if (a.tv_sec > b.tv_sec)
return false;
- return a.tv_usec < b.tv_usec;
+ return a.tv_nsec < b.tv_nsec;
}
-bool time_eq(struct timeval a, struct timeval b)
+bool time_eq(struct timespec a, struct timespec b)
{
- return a.tv_sec == b.tv_sec && a.tv_usec == b.tv_usec;
+ return a.tv_sec == b.tv_sec && a.tv_nsec == b.tv_nsec;
}
-struct timeval time_sub(struct timeval recent, struct timeval old)
+struct timespec time_sub(struct timespec recent, struct timespec old)
{
- struct timeval diff;
+ struct timespec diff;
diff.tv_sec = recent.tv_sec - old.tv_sec;
- if (old.tv_usec > recent.tv_usec) {
+ if (old.tv_nsec > recent.tv_nsec) {
diff.tv_sec--;
- diff.tv_usec = 1000000 + recent.tv_usec - old.tv_usec;
+ diff.tv_nsec = 1000000000 + recent.tv_nsec - old.tv_nsec;
} else
- diff.tv_usec = recent.tv_usec - old.tv_usec;
+ diff.tv_nsec = recent.tv_nsec - old.tv_nsec;
assert(diff.tv_sec >= 0);
return diff;
}
-struct timeval time_add(struct timeval a, struct timeval b)
+struct timespec time_add(struct timespec a, struct timespec b)
{
- struct timeval sum;
+ struct timespec sum;
sum.tv_sec = a.tv_sec + b.tv_sec;
- sum.tv_usec = a.tv_usec + b.tv_usec;
- if (sum.tv_usec > 1000000) {
+ sum.tv_nsec = a.tv_nsec + b.tv_nsec;
+ if (sum.tv_nsec >= 1000000000) {
sum.tv_sec++;
- sum.tv_usec -= 1000000;
+ sum.tv_nsec -= 1000000000;
}
return sum;
}
-struct timeval time_divide(struct timeval t, unsigned long div)
+struct timespec time_divide(struct timespec t, unsigned long div)
{
- return time_from_usec(time_to_usec(t) / div);
+ struct timespec res;
+ uint64_t rem, ns;
+
+ /* Dividing seconds is simple. */
+ res.tv_sec = t.tv_sec / div;
+ rem = t.tv_sec % div;
+
+ /* If we can't fit remainder * 1,000,000,000 in 64 bits? */
+#if 0 /* ilog is great, but we use fp for multiply anyway. */
+ bits = ilog64(rem);
+ if (bits + 30 >= 64) {
+ /* Reduce accuracy slightly */
+ rem >>= (bits - (64 - 30));
+ div >>= (bits - (64 - 30));
+ }
+#endif
+ if (rem & ~(((uint64_t)1 << 30) - 1)) {
+ /* FIXME: fp is cheating! */
+ double nsec = rem * 1000000000.0 + t.tv_nsec;
+ res.tv_nsec = nsec / div;
+ } else {
+ ns = rem * 1000000000 + t.tv_nsec;
+ res.tv_nsec = ns / div;
+ }
+ return res;
}
-struct timeval time_multiply(struct timeval t, unsigned long mult)
+struct timespec time_multiply(struct timespec t, unsigned long mult)
{
- return time_from_usec(time_to_usec(t) * mult);
+ struct timespec res;
+
+ /* Are we going to overflow if we multiply nsec? */
+ if (mult & ~((1UL << 30) - 1)) {
+ /* FIXME: fp is cheating! */
+ double nsec = (double)t.tv_nsec * mult;
+
+ res.tv_sec = nsec / 1000000000.0;
+ res.tv_nsec = nsec - (res.tv_sec * 1000000000.0);
+ } else {
+ uint64_t nsec = t.tv_nsec * mult;
+
+ res.tv_nsec = nsec % 1000000000;
+ res.tv_sec = nsec / 1000000000;
+ }
+ res.tv_sec += t.tv_sec * mult;
+ return res;
}
-uint64_t time_to_msec(struct timeval t)
+uint64_t time_to_msec(struct timespec t)
{
uint64_t msec;
- msec = t.tv_usec / 1000 + (uint64_t)t.tv_sec * 1000;
+ msec = t.tv_nsec / 1000000 + (uint64_t)t.tv_sec * 1000;
return msec;
}
-uint64_t time_to_usec(struct timeval t)
+uint64_t time_to_usec(struct timespec t)
{
uint64_t usec;
- usec = t.tv_usec + (uint64_t)t.tv_sec * 1000000;
+ usec = t.tv_nsec / 1000 + (uint64_t)t.tv_sec * 1000000;
return usec;
}
-struct timeval time_from_msec(uint64_t msec)
+uint64_t time_to_nsec(struct timespec t)
{
- struct timeval t;
+ uint64_t nsec;
- t.tv_usec = (msec % 1000) * 1000;
+ nsec = t.tv_nsec + (uint64_t)t.tv_sec * 1000000000;
+ return nsec;
+}
+
+struct timespec time_from_msec(uint64_t msec)
+{
+ struct timespec t;
+
+ t.tv_nsec = (msec % 1000) * 1000000;
t.tv_sec = msec / 1000;
return t;
}
-struct timeval time_from_usec(uint64_t usec)
+struct timespec time_from_usec(uint64_t usec)
{
- struct timeval t;
+ struct timespec t;
- t.tv_usec = usec % 1000000;
+ t.tv_nsec = (usec % 1000000) * 1000;
t.tv_sec = usec / 1000000;
return t;
}
+
+struct timespec time_from_nsec(uint64_t nsec)
+{
+ struct timespec t;
+
+ t.tv_nsec = nsec % 1000000000;
+ t.tv_sec = nsec / 1000000000;
+ return t;
+}
projects / ccan / blobdiff