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/*
* This file is part of libFirm.
* Copyright (C) 2012 University of Karlsruhe.
*/
/**
* @file
* @brief OS abstraction from time measurement
* @author Sebastian Hack, Michael Beck, Matthias Braun
*/
#ifndef FIRM_STAT_TIMING_H
#define FIRM_STAT_TIMING_H
#include <stddef.h>
#include <sys/time.h>
typedef unsigned long long timing_ticks_t;
/**
* returns time in micro seconds.
* The time is relative to an unspecified start, so it can only be used to
* measure relative time/timespans.
*/
static inline timing_ticks_t timing_ticks(void)
{
#if defined(__i386__) || defined(_M_IX86) || defined(_M_X64)
unsigned h;
unsigned l;
__asm__ volatile("rdtsc" : "=a" (l), "=d" (h));
return (timing_ticks_t)h << 32 | l;
#else
struct timeval tval;
gettimeofday(&tval, NULL);
return (unsigned long) (tval.tv_usec + 1000000 * tval.tv_sec);
#endif
}
void timing_enter_max_prio(void);
void timing_leave_max_prio(void);
#endif
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