1 /* SPDX-License-Identifier: GPL-2.0 */
8 #include "gcc-compat.h"
15 * Compute the difference of two time values.
18 * \param a Subtrahend.
19 * \param diff Result pointer.
21 * If \a diff is not \p NULL, it contains the absolute value |\a b - \a a| on
24 * \return If \a b < \a a, this function returns -1, otherwise it returns 1.
26 int tv_diff(const struct timeval *b, const struct timeval *a, struct timeval *diff)
30 if ((b->tv_sec < a->tv_sec) ||
31 ((b->tv_sec == a->tv_sec) && (b->tv_usec < a->tv_usec))) {
32 const struct timeval *tmp = a;
39 diff->tv_sec = b->tv_sec - a->tv_sec;
40 if (b->tv_usec < a->tv_usec) {
42 diff->tv_usec = 1000 * 1000 - a->tv_usec + b->tv_usec;
44 diff->tv_usec = b->tv_usec - a->tv_usec;
48 int64_t get_current_time(void)