1 /* vi: set sw=4 ts=4: */
5 * Copyright (C) 2007 Denis Vlasenko
7 * Licensed under GPL version 2, see file LICENSE in this tarball for details.
12 #if ENABLE_MONOTONIC_SYSCALL
13 #include <sys/syscall.h>
15 /* libc has incredibly messy way of doing this,
16 * typically requiring -lrt. We just skip all this mess */
17 unsigned long long monotonic_us(void)
20 if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &ts))
21 bb_error_msg_and_die("clock_gettime(MONOTONIC) failed");
22 return ts.tv_sec * 1000000ULL + ts.tv_nsec/1000;
24 unsigned monotonic_sec(void)
27 if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &ts))
28 bb_error_msg_and_die("clock_gettime(MONOTONIC) failed");
32 unsigned long long monotonic_us(void)
35 gettimeofday(&tv, NULL);
36 return tv.tv_sec * 1000000ULL + tv.tv_usec;
39 unsigned monotonic_sec(void)