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  • Committer: brian
  • Date: 2008-06-25 05:29:13 UTC
  • Revision ID: brian@localhost.localdomain-20080625052913-6upwo0jsrl4lnapl
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include/my_alarm.h
 
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/* Copyright (C) 2000 MySQL AB
 
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   This program is free software; you can redistribute it and/or modify
 
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   it under the terms of the GNU General Public License as published by
 
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   the Free Software Foundation; version 2 of the License.
 
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   This program is distributed in the hope that it will be useful,
 
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
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   GNU General Public License for more details.
 
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   You should have received a copy of the GNU General Public License
 
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   along with this program; if not, write to the Free Software
 
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   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
 
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/*
 
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  File to include when we want to use alarm or a loop_counter to display
 
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  some information when a program is running
 
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*/
 
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#ifndef _my_alarm_h
 
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#define _my_alarm_h
 
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#ifdef  __cplusplus
 
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extern "C" {
 
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#endif
 
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extern int volatile my_have_got_alarm;
 
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extern ulong my_time_to_wait_for_lock;
 
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#if defined(HAVE_ALARM) && !defined(NO_ALARM_LOOP)
 
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#include <signal.h>
 
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#define ALARM_VARIABLES uint alarm_old=0; \
 
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                        sig_return alarm_signal=0
 
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#define ALARM_INIT      my_have_got_alarm=0 ; \
 
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                        alarm_old=(uint) alarm(MY_HOW_OFTEN_TO_ALARM); \
 
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                        alarm_signal=signal(SIGALRM,my_set_alarm_variable);
 
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#define ALARM_END       VOID(signal(SIGALRM,alarm_signal)); \
 
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                        VOID(alarm(alarm_old));
 
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#define ALARM_TEST      my_have_got_alarm
 
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#ifdef DONT_REMEMBER_SIGNAL
 
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#define ALARM_REINIT    VOID(alarm(MY_HOW_OFTEN_TO_ALARM)); \
 
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                        VOID(signal(SIGALRM,my_set_alarm_variable));\
 
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                        my_have_got_alarm=0;
 
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#else
 
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#define ALARM_REINIT    VOID(alarm((uint) MY_HOW_OFTEN_TO_ALARM)); \
 
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                        my_have_got_alarm=0;
 
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#endif /* DONT_REMEMBER_SIGNAL */
 
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#else
 
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#define ALARM_VARIABLES long alarm_pos=0,alarm_end_pos=MY_HOW_OFTEN_TO_WRITE-1
 
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#define ALARM_INIT
 
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#define ALARM_END
 
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#define ALARM_TEST (alarm_pos++ >= alarm_end_pos)
 
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#define ALARM_REINIT alarm_end_pos+=MY_HOW_OFTEN_TO_WRITE
 
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#endif /* HAVE_ALARM */
 
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#ifdef  __cplusplus
 
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}
 
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#endif
 
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#endif