release/src/router/mysql/storage/ndb/include/portlib/NdbTick.h

   1 /* Copyright (c) 2003-2007 MySQL AB
   2
   3    This program is free software; you can redistribute it and/or modify
   4    it under the terms of the GNU General Public License as published by
   5    the Free Software Foundation; version 2 of the License.
   6
   7    This program is distributed in the hope that it will be useful,
   8    but WITHOUT ANY WARRANTY; without even the implied warranty of
   9    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10    GNU General Public License for more details.
  11
  12    You should have received a copy of the GNU General Public License
  13    along with this program; if not, write to the Free Software
  14    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA */
  15
  16 #ifndef NDB_TICK_H
  17 #define NDB_TICK_H
  18
  19 #include <ndb_types.h>
  20
  21 #ifdef  __cplusplus
  22 extern "C" {
  23 #endif
  24
  25 typedef Uint64 NDB_TICKS;
  26
  27 /**
  28  * Returns the current millisecond since 1970
  29  */
  30 NDB_TICKS NdbTick_CurrentMillisecond(void);
  31
  32 /**
  33  * Get current micro second
  34  * Second method is simply abstraction on top of the first
  35  *
  36  * Returns 0 - Success
  37  */
  38 int NdbTick_CurrentMicrosecond(NDB_TICKS * secs, Uint32 * micros);
  39
  40 struct MicroSecondTimer {
  41   NDB_TICKS seconds;
  42   NDB_TICKS micro_seconds;
  43 };
  44
  45 /**
  46  * Get time between start and stop time in microseconds
  47  * Abstraction to get time in struct
  48  *
  49  * 0 means stop happened at or before start time
  50  */
  51 NDB_TICKS NdbTick_getMicrosPassed(struct MicroSecondTimer start,
  52                             struct MicroSecondTimer stop);
  53 int NdbTick_getMicroTimer(struct MicroSecondTimer* time_now);
  54
  55 #ifdef  __cplusplus
  56 }
  57 #endif
  58
  59 #endif
  60