Current File : //usr/include/mysql/server/private/thr_alarm.h
/* Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.
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; version 2 of the License.
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */
/* Prototypes when using thr_alarm library functions */
#ifndef _thr_alarm_h
#define _thr_alarm_h
#ifdef __cplusplus
extern "C" {
#endif
#ifndef USE_ALARM_THREAD
#define USE_ONE_SIGNAL_HAND /* One must call process_alarm */
#endif
#ifdef HAVE_rts_threads
#undef USE_ONE_SIGNAL_HAND
#define USE_ALARM_THREAD
#define THR_SERVER_ALARM SIGUSR1
#else
#define THR_SERVER_ALARM SIGALRM
#endif
typedef struct st_alarm_info
{
time_t next_alarm_time;
uint active_alarms;
uint max_used_alarms;
} ALARM_INFO;
void thr_alarm_info(ALARM_INFO *info);
extern my_bool my_disable_thr_alarm;
#ifdef _WIN32
#define DONT_USE_THR_ALARM
#endif
#if defined(DONT_USE_THR_ALARM)
#define USE_ALARM_THREAD
#undef USE_ONE_SIGNAL_HAND
typedef my_bool thr_alarm_t;
typedef my_bool ALARM;
#define thr_alarm_init(A) (*(A))=0
#define thr_alarm_in_use(A) (*(A) != 0)
#define thr_end_alarm(A)
#define thr_alarm(A,B,C) ((*(A)=1)-1)
/* The following should maybe be (*(A)) */
#define thr_got_alarm(A) 0
#define init_thr_alarm(A)
#define thr_alarm_kill(A)
#define resize_thr_alarm(N)
#define end_thr_alarm(A)
#else
#if defined(_WIN32)
typedef struct st_thr_alarm_entry
{
UINT_PTR crono;
} thr_alarm_entry;
#else /* System with posix threads */
typedef int thr_alarm_entry;
#define thr_got_alarm(thr_alarm) (**(thr_alarm))
#endif /* _WIN32 */
typedef thr_alarm_entry* thr_alarm_t;
typedef struct st_alarm {
time_t expire_time;
thr_alarm_entry alarmed; /* set when alarm is due */
pthread_t thread;
my_thread_id thread_id;
uint index_in_queue;
my_bool malloced;
} ALARM;
extern uint thr_client_alarm;
extern pthread_t alarm_thread;
#define thr_alarm_init(A) (*(A))=0
#define thr_alarm_in_use(A) (*(A)!= 0)
void init_thr_alarm(uint max_alarm);
void resize_thr_alarm(uint max_alarms);
my_bool thr_alarm(thr_alarm_t *alarmed, uint sec, ALARM *buff);
void thr_alarm_kill(my_thread_id thread_id);
void thr_end_alarm(thr_alarm_t *alarmed);
void end_thr_alarm(my_bool free_structures);
sig_handler process_alarm(int);
#ifndef thr_got_alarm
my_bool thr_got_alarm(thr_alarm_t *alrm);
#endif
#endif /* DONT_USE_THR_ALARM */
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* _thr_alarm_h */
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