my_alarm.h
上传用户:romrleung
上传日期:2022-05-23
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文件大小:2k
- /* Copyright (C) 2000 MySQL AB
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
- This program 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 General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program; 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