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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/* ZenTimer
* Copyright (C) 2000-2012 Jeffrey Stedfast
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#ifndef __ZENTIMER_H__
#define __ZENTIMER_H__
#ifdef ENABLE_ZENTIMER
#include <stdio.h>
#ifdef WIN32
#include <windows.h>
#else
#include <sys/time.h>
#endif
#ifdef HAVE_STDINT_H
#include <stdint.h>
#elif HAVE_INTTYPES_H
#include <inttypes.h>
#else
typedef unsigned char uint8_t;
typedef unsigned long int uint32_t;
typedef unsigned long long uint64_t;
#endif
#ifdef __cplusplus
extern "C" {
#pragma }
#endif /* __cplusplus */
#define ZTIME_USEC_PER_SEC 1000000
/* ztime_t represents usec */
typedef uint64_t ztime_t;
#ifdef WIN32
static uint64_t ztimer_freq = 0;
#endif
static void
ztime (ztime_t *ztimep)
{
#ifdef WIN32
QueryPerformanceCounter ((LARGE_INTEGER *) ztimep);
#else
struct timeval tv;
gettimeofday (&tv, NULL);
*ztimep = ((uint64_t) tv.tv_sec * ZTIME_USEC_PER_SEC) + tv.tv_usec;
#endif
}
enum {
ZTIMER_INACTIVE = 0,
ZTIMER_ACTIVE = (1 << 0),
ZTIMER_PAUSED = (1 << 1),
};
typedef struct {
ztime_t start;
ztime_t stop;
int state;
} ztimer_t;
#define ZTIMER_INITIALIZER { 0, 0, 0 }
/* default timer */
static ztimer_t __ztimer = ZTIMER_INITIALIZER;
static void
ZenTimerStart (ztimer_t *ztimer)
{
ztimer = ztimer ? ztimer : &__ztimer;
ztimer->state = ZTIMER_ACTIVE;
ztime (&ztimer->start);
}
static void
ZenTimerStop (ztimer_t *ztimer)
{
ztimer = ztimer ? ztimer : &__ztimer;
ztime (&ztimer->stop);
ztimer->state = ZTIMER_INACTIVE;
}
static void
ZenTimerPause (ztimer_t *ztimer)
{
ztimer = ztimer ? ztimer : &__ztimer;
ztime (&ztimer->stop);
ztimer->state |= ZTIMER_PAUSED;
}
static void
ZenTimerResume (ztimer_t *ztimer)
{
ztime_t now, delta;
ztimer = ztimer ? ztimer : &__ztimer;
/* unpause */
ztimer->state &= ~ZTIMER_PAUSED;
ztime (&now);
/* calculate time since paused */
delta = now - ztimer->stop;
/* adjust start time to account for time elapsed since paused */
ztimer->start += delta;
}
static double
ZenTimerElapsed (ztimer_t *ztimer, uint64_t *usec)
{
#ifdef WIN32
static uint64_t freq = 0;
ztime_t delta, stop;
if (freq == 0)
QueryPerformanceFrequency ((LARGE_INTEGER *) &freq);
#else
static uint64_t freq = ZTIME_USEC_PER_SEC;
ztime_t delta, stop;
#endif
ztimer = ztimer ? ztimer : &__ztimer;
if (ztimer->state != ZTIMER_ACTIVE)
stop = ztimer->stop;
else
ztime (&stop);
delta = stop - ztimer->start;
if (usec != NULL)
*usec = (uint64_t) (delta * ((double) ZTIME_USEC_PER_SEC / (double) freq));
return (double) delta / (double) freq;
}
static void
ZenTimerReport (ztimer_t *ztimer, const char *oper)
{
fprintf (stderr, "ZenTimer: %s took %.6f seconds\n", oper, ZenTimerElapsed (ztimer, NULL));
}
#ifdef __cplusplus
}
#endif /* __cplusplus */
#else /* ! ENABLE_ZENTIMER */
#define ZenTimerStart(ztimerp)
#define ZenTimerStop(ztimerp)
#define ZenTimerPause(ztimerp)
#define ZenTimerResume(ztimerp)
#define ZenTimerElapsed(ztimerp, usec)
#define ZenTimerReport(ztimerp, oper)
#endif /* ENABLE_ZENTIMER */
#endif /* __ZENTIMER_H__ */
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