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      1 /*
      2  * Copyright (c) 2004 Michael David Adams.
      3  * All rights reserved.
      4  */
      5 
      6 /* __START_OF_JASPER_LICENSE__
      7  *
      8  * JasPer License Version 2.0
      9  *
     10  * Copyright (c) 2001-2006 Michael David Adams
     11  * Copyright (c) 1999-2000 Image Power, Inc.
     12  * Copyright (c) 1999-2000 The University of British Columbia
     13  *
     14  * All rights reserved.
     15  *
     16  * Permission is hereby granted, free of charge, to any person (the
     17  * "User") obtaining a copy of this software and associated documentation
     18  * files (the "Software"), to deal in the Software without restriction,
     19  * including without limitation the rights to use, copy, modify, merge,
     20  * publish, distribute, and/or sell copies of the Software, and to permit
     21  * persons to whom the Software is furnished to do so, subject to the
     22  * following conditions:
     23  *
     24  * 1.  The above copyright notices and this permission notice (which
     25  * includes the disclaimer below) shall be included in all copies or
     26  * substantial portions of the Software.
     27  *
     28  * 2.  The name of a copyright holder shall not be used to endorse or
     29  * promote products derived from the Software without specific prior
     30  * written permission.
     31  *
     32  * THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS
     33  * LICENSE.  NO USE OF THE SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER
     34  * THIS DISCLAIMER.  THE SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS
     35  * "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
     36  * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
     37  * PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.  IN NO
     38  * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
     39  * INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
     40  * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
     41  * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
     42  * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.  NO ASSURANCES ARE
     43  * PROVIDED BY THE COPYRIGHT HOLDERS THAT THE SOFTWARE DOES NOT INFRINGE
     44  * THE PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OF ANY OTHER ENTITY.
     45  * EACH COPYRIGHT HOLDER DISCLAIMS ANY LIABILITY TO THE USER FOR CLAIMS
     46  * BROUGHT BY ANY OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL
     47  * PROPERTY RIGHTS OR OTHERWISE.  AS A CONDITION TO EXERCISING THE RIGHTS
     48  * GRANTED HEREUNDER, EACH USER HEREBY ASSUMES SOLE RESPONSIBILITY TO SECURE
     49  * ANY OTHER INTELLECTUAL PROPERTY RIGHTS NEEDED, IF ANY.  THE SOFTWARE
     50  * IS NOT FAULT-TOLERANT AND IS NOT INTENDED FOR USE IN MISSION-CRITICAL
     51  * SYSTEMS, SUCH AS THOSE USED IN THE OPERATION OF NUCLEAR FACILITIES,
     52  * AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL
     53  * SYSTEMS, DIRECT LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH
     54  * THE FAILURE OF THE SOFTWARE OR SYSTEM COULD LEAD DIRECTLY TO DEATH,
     55  * PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH
     56  * RISK ACTIVITIES").  THE COPYRIGHT HOLDERS SPECIFICALLY DISCLAIM ANY
     57  * EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES.
     58  *
     59  * __END_OF_JASPER_LICENSE__
     60  */
     61 
     62 /*
     63  * Timing Routines
     64  *
     65  * $Id: jas_tmr.c,v 1.1 2008-05-26 09:40:51 vp153 Exp $
     66  */
     67 
     68 /******************************************************************************\
     69 * Includes.
     70 \******************************************************************************/
     71 
     72 #include <stdio.h>
     73 #include <stdlib.h>
     74 #include <time.h>
     75 
     76 #include "jasper/jas_tmr.h"
     77 
     78 /******************************************************************************\
     79 * Code.
     80 \******************************************************************************/
     81 
     82 #if defined(HAVE_GETTIMEOFDAY)
     83 
     84 void jas_tmr_start(jas_tmr_t *tmr)
     85 {
     86     if (gettimeofday(&tmr->start, 0)) {
     87         abort();
     88     }
     89 }
     90 
     91 void jas_tmr_stop(jas_tmr_t *tmr)
     92 {
     93     if (gettimeofday(&tmr->stop, 0)) {
     94         abort();
     95     }
     96 }
     97 
     98 double jas_tmr_get(jas_tmr_t *tmr)
     99 {
    100     double t0;
    101     double t1;
    102     t0 = ((double) tmr->start.tv_sec) + ((double) tmr->start.tv_usec) / 1e6;
    103     t1 = ((double) tmr->stop.tv_sec) + ((double) tmr->stop.tv_usec) / 1e6;
    104     return t1 - t0;
    105 }
    106 
    107 #elif defined(HAVE_GETRUSAGE)
    108 
    109 void jas_tmr_start(jas_tmr_t *tmr)
    110 {
    111     if (getrusage(RUSAGE_SELF, &tmr->start) < 0) {
    112         abort();
    113     }
    114 }
    115 
    116 void jas_tmr_stop(jas_tmr_t *tmr)
    117 {
    118     if (getrusage(RUSAGE_SELF, &tmr->stop) < 0) {
    119         abort();
    120     }
    121 }
    122 
    123 double jas_tmr_get(jas_tmr_t *tmr)
    124 {
    125     double t;
    126     t = ((tmr->stop.ru_utime.tv_sec * 1e6 + tmr->stop.ru_utime.tv_usec) -
    127       (tmr->start.ru_utime.tv_sec * 1e6 + tmr->start.ru_utime.tv_usec)) / 1e6;
    128     t += ((tmr->stop.ru_stime.tv_sec * 1e6 + tmr->stop.ru_stime.tv_usec) -
    129       (tmr->start.ru_stime.tv_sec * 1e6 + tmr->start.ru_stime.tv_usec)) / 1e6;
    130     return t;
    131 }
    132 
    133 #else
    134 
    135 void jas_tmr_start(jas_tmr_t *tmr)
    136 {
    137 }
    138 
    139 void jas_tmr_stop(jas_tmr_t *tmr)
    140 {
    141 }
    142 
    143 double jas_tmr_get(jas_tmr_t *tmr)
    144 {
    145     return 0.0;
    146 }
    147 
    148 #endif
    149 
    150