energy/tm_stat.h

   1 #ifndef _TM_STAT_H
   2 #define _TM_STAT_H
   3
   4 /**
   5  * @file energy/tm_stat.h
   6  * @author Vyacheslav Cherkashin <v.cherkashin@samsung.com>
   7  *
   8  * @section LICENSE
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  22  *
  23  * @section COPYFIGHT
  24  * Copyright (C) Samsung Electronics, 2013
  25  *
  26  */
  27
  28
  29 #include <linux/types.h>
  30 #include <linux/time.h>
  31
  32
  33 /**
  34  * @struct tm_stat
  35  * @brief Description of statistic time
  36  */
  37 struct tm_stat {
  38         u64 timestamp;          /**< Time stamp */
  39         u64 running;            /**< Running time */
  40 };
  41
  42 /**
  43  * @def DEFINE_TM_STAT
  44  * Initialize of tm_stat struct @hideinitializer
  45  */
  46 #define DEFINE_TM_STAT(tm_name)         \
  47         struct tm_stat tm_name = {      \
  48                 .timestamp = 0,         \
  49                 .running = 0            \
  50         }
  51
  52
  53 static inline u64 get_ntime(void)
  54 {
  55         struct timespec ts;
  56         getnstimeofday(&ts);
  57         return timespec_to_ns(&ts);
  58 }
  59
  60 static inline void tm_stat_init(struct tm_stat *tm)
  61 {
  62         tm->timestamp = 0;
  63         tm->running = 0;
  64 }
  65
  66 static inline void tm_stat_set_timestamp(struct tm_stat *tm, u64 time)
  67 {
  68         tm->timestamp = time;
  69 }
  70
  71 static inline u64 tm_stat_timestamp(struct tm_stat *tm)
  72 {
  73         return tm->timestamp;
  74 }
  75
  76 static inline void tm_stat_update(struct tm_stat *tm, u64 time)
  77 {
  78         tm->running += time - tm->timestamp;
  79 }
  80
  81 static inline u64 tm_stat_running(struct tm_stat *tm)
  82 {
  83         return tm->running;
  84 }
  85
  86 static inline u64 tm_stat_current_running(struct tm_stat *tm, u64 now)
  87 {
  88         if (unlikely(now < tm->timestamp))
  89                 printk("XXX %p WARNING now(%llu) < tmstmp(%llu)\n",
  90                        tm, now, tm->timestamp);
  91         return tm->timestamp ? tm->running + now - tm->timestamp: tm->running;
  92 }
  93
  94 #endif /* _TM_STAT_H */