libit

00001 /*
00002    libit - Library for basic source and channel coding functions
00003    Copyright (C) 2005-2006 Vivien Chappelier, Herve Jegou
00004 
00005    This library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Library General Public
00007    License as published by the Free Software Foundation; either
00008    version 2 of the License, or (at your option) any later version.
00009 
00010    This library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Library General Public License for more details.
00014 
00015    You should have received a copy of the GNU Library General Public
00016    License along with this library; if not, write to the Free
00017    Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
00018 */ 
00019 
00020 /*
00021   Timer, only for linux
00022   Copyright (C) 2006 Herve Jegou
00023 Thanks to Pierre-Hugues Joalland for the original code
00024 */
00025 
00026 #ifndef __timer_h_
00027 #define __timer_h_
00028 
00029 #include <sys/time.h>
00030 #include <sys/resource.h>
00031 
00032 typedef struct {
00033   unsigned short    status;           /* timing status : 0 <=> idle, 1 <=> active */
00034   
00035   struct timeval    time_now_wall;    /* now registered wall time */
00036   struct timeval    time_last_wall;   /* last registered wall time */
00037   double            amount_wall;      /* amount of wall time */
00038   
00039   struct rusage     time_now_cpu;     /* now registered cpu (user + syst) time  */
00040   struct rusage     time_last_cpu;    /* last registered cpu (user + syst) time */
00041   double            amount_user;      /* amount of user time */
00042   double            amount_system;    /* amount of system time */
00043 } it_timer_t;
00044 
00045 /* Initialization of the timer */
00046 it_timer_t * timer_new();
00047 
00048 /* Reinitialization of the timer */
00049 void timer_rtz( it_timer_t * timer );
00050   
00051 /* Free the timer */
00052 void timer_free( it_timer_t * timer );
00053   
00054 /* Set the timer on or off */
00055 void timer_on( it_timer_t * timer );
00056 void timer_off( it_timer_t * timer );
00057 
00058 /* Return the different kind of usages (CPU is system+user)*/
00059 double timer_wall( it_timer_t * timer );
00060 double timer_user( it_timer_t * timer );
00061 double timer_system( it_timer_t * timer );
00062 double timer_cpu( it_timer_t * timer );
00063 
00064 #endif
www/contrib/timer/timer.h
