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/* vi: set sw=4 ts=4: */
/*
* Utility routines.
*
* Copyright (C) 2007 Denis Vlasenko
*
* Licensed under GPL version 2, see file LICENSE in this tarball for details.
*/
#include "libbb.h"
#if ENABLE_MONOTONIC_SYSCALL
#include <sys/syscall.h>
/* libc has incredibly messy way of doing this,
* typically requiring -lrt. We just skip all this mess */
unsigned long long monotonic_us(void)
{
struct timespec ts;
if (syscall(__NR_clock_gettime, CLOCK_MONOTONIC, &ts))
bb_error_msg_and_die("clock_gettime(MONOTONIC) failed");
return ts.tv_sec * 1000000ULL + ts.tv_nsec/1000;
}
#else
unsigned long long monotonic_us(void)
{
struct timeval tv;
if (gettimeofday(&tv, NULL))
bb_error_msg_and_die("gettimeofday failed");
return tv.tv_sec * 1000000ULL + tv_usec;
}
#endif
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