my_alarm.h
上传用户:tsgydb
上传日期:2007-04-14
资源大小:10674k
文件大小:2k
- /* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
-
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public
- License as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later version.
-
- This library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
-
- You should have received a copy of the GNU Library General Public
- License along with this library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
- MA 02111-1307, USA */
- /*
- File to include when we want to use alarm or a loop_counter to display
- some information when a program is running
- */
- #ifndef _my_alarm_h
- #define _my_alarm_h
- #ifdef __cplusplus
- extern "C" {
- #endif
- extern int volatile my_have_got_alarm;
- extern ulong my_time_to_wait_for_lock;
- #if defined(HAVE_ALARM) && !defined(NO_ALARM_LOOP)
- #include <signal.h>
- #define ALARM_VARIABLES uint alarm_old=0;
- sig_return alarm_signal=0
- #define ALARM_INIT my_have_got_alarm=0 ;
- alarm_old=(uint) alarm(MY_HOW_OFTEN_TO_ALARM);
- alarm_signal=signal(SIGALRM,my_set_alarm_variable);
- #define ALARM_END VOID(signal(SIGALRM,alarm_signal));
- VOID(alarm(alarm_old));
- #define ALARM_TEST my_have_got_alarm
- #ifdef DONT_REMEMBER_SIGNAL
- #define ALARM_REINIT VOID(alarm(MY_HOW_OFTEN_TO_ALARM));
- VOID(signal(SIGALRM,my_set_alarm_variable));
- my_have_got_alarm=0;
- #else
- #define ALARM_REINIT VOID(alarm((uint) MY_HOW_OFTEN_TO_ALARM));
- my_have_got_alarm=0;
- #endif /* DONT_REMEMBER_SIGNAL */
- #else
- #define ALARM_VARIABLES long alarm_pos=0,alarm_end_pos=MY_HOW_OFTEN_TO_WRITE-1
- #define ALARM_INIT
- #define ALARM_END
- #define ALARM_TEST (alarm_pos++ >= alarm_end_pos)
- #define ALARM_REINIT alarm_end_pos+=MY_HOW_OFTEN_TO_WRITE
- #endif /* HAVE_ALARM */
- #ifdef __cplusplus
- }
- #endif
- #endif