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Viewing changes to mysys/thr_alarm.h

  • Committer: Lee
  • Date: 2008-10-30 22:02:01 UTC
  • mto: (572.1.2 devel)
  • mto: This revision was merged to the branch mainline in revision 573.
  • Revision ID: lbieber@lbieber-desktop-20081030220201-elb6qprbzpn7c5a4
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mysys/thr_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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/* Prototypes when using thr_alarm library functions */
 
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#ifndef _thr_alarm_h
 
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#define _thr_alarm_h
 
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#ifdef  __cplusplus
 
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extern "C" {
 
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#endif
 
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#ifndef USE_ALARM_THREAD
 
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#define USE_ONE_SIGNAL_HAND             /* One must call process_alarm */
 
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#endif
 
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#ifdef HAVE_rts_threads
 
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#undef USE_ONE_SIGNAL_HAND
 
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#define USE_ALARM_THREAD
 
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#define THR_SERVER_ALARM SIGUSR1
 
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#else
 
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#define THR_SERVER_ALARM SIGALRM
 
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#endif
 
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typedef struct st_alarm_info
 
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{
 
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  uint32_t next_alarm_time;
 
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  uint32_t active_alarms;
 
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  uint32_t max_used_alarms;
 
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} ALARM_INFO;
 
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void thr_alarm_info(ALARM_INFO *info);
 
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#if defined(DONT_USE_THR_ALARM)
 
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#define USE_ALARM_THREAD
 
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#undef USE_ONE_SIGNAL_HAND
 
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typedef bool thr_alarm_t;
 
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typedef bool ALARM;
 
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#define thr_alarm_init(A) (*(A))=0
 
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#define thr_alarm_in_use(A) (*(A) != 0)
 
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#define thr_end_alarm(A)
 
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#define thr_alarm(A,B,C) ((*(A)=1)-1)
 
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/* The following should maybe be (*(A)) */
 
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#define thr_got_alarm(A) 0
 
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#define init_thr_alarm(A)
 
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#define thr_alarm_kill(A)
 
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#define resize_thr_alarm(N)
 
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#define end_thr_alarm(A)
 
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#else
 
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typedef int thr_alarm_entry;
 
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#define thr_got_alarm(thr_alarm) (**(thr_alarm))
 
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typedef thr_alarm_entry* thr_alarm_t;
 
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typedef struct st_alarm {
 
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  uint32_t expire_time;
 
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  thr_alarm_entry alarmed;              /* set when alarm is due */
 
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  pthread_t thread;
 
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  my_thread_id thread_id;
 
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  bool malloced;
 
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} ALARM;
 
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extern uint32_t thr_client_alarm;
 
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extern pthread_t alarm_thread;
 
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#define thr_alarm_init(A) (*(A))=0
 
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#define thr_alarm_in_use(A) (*(A)!= 0)
 
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void init_thr_alarm(uint32_t max_alarm);
 
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void resize_thr_alarm(uint32_t max_alarms);
 
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bool thr_alarm(thr_alarm_t *alarmed, uint32_t sec, ALARM *buff);
 
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void thr_alarm_kill(my_thread_id thread_id);
 
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void thr_end_alarm(thr_alarm_t *alarmed);
 
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void end_thr_alarm(bool free_structures);
 
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RETSIGTYPE process_alarm(int);
 
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#ifndef thr_got_alarm
 
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bool thr_got_alarm(thr_alarm_t *alrm);
 
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#endif
 
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#endif /* DONT_USE_THR_ALARM */
 
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#ifdef  __cplusplus
 
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}
 
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#endif /* __cplusplus */
 
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#endif /* _thr_alarm_h */