thr_alarm.c
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:28k
- /* 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 */
- /* To avoid problems with alarms in debug code, we disable DBUG here */
- #undef DBUG_OFF
- #define DBUG_OFF
- #include <my_global.h>
- #if defined(THREAD) && !defined(DONT_USE_THR_ALARM)
- #include <errno.h>
- #include <my_pthread.h>
- #include <signal.h>
- #include <my_sys.h>
- #include <m_string.h>
- #include <queues.h>
- #include "thr_alarm.h"
- #ifdef HAVE_SYS_SELECT_H
- #include <sys/select.h> /* AIX needs this for fd_set */
- #endif
- #ifndef ETIME
- #define ETIME ETIMEDOUT
- #endif
- static int alarm_aborted=1; /* No alarm thread */
- my_bool thr_alarm_inited= 0;
- volatile my_bool alarm_thread_running= 0;
- static sig_handler process_alarm_part2(int sig);
- #if !defined(__WIN__) && !defined(__EMX__) && !defined(OS2)
- static pthread_mutex_t LOCK_alarm;
- static pthread_cond_t COND_alarm;
- static sigset_t full_signal_set;
- static QUEUE alarm_queue;
- static uint max_used_alarms=0;
- pthread_t alarm_thread;
- #ifdef USE_ALARM_THREAD
- static void *alarm_handler(void *arg);
- #define reschedule_alarms() pthread_cond_signal(&COND_alarm)
- #else
- #define reschedule_alarms() pthread_kill(alarm_thread,THR_SERVER_ALARM)
- #endif
- #if THR_CLIENT_ALARM != SIGALRM || defined(USE_ALARM_THREAD)
- static sig_handler thread_alarm(int sig __attribute__((unused)));
- #endif
- static int compare_ulong(void *not_used __attribute__((unused)),
- byte *a_ptr,byte* b_ptr)
- {
- ulong a=*((ulong*) a_ptr),b= *((ulong*) b_ptr);
- return (a < b) ? -1 : (a == b) ? 0 : 1;
- }
- void init_thr_alarm(uint max_alarms)
- {
- sigset_t s;
- DBUG_ENTER("init_thr_alarm");
- alarm_aborted=0;
- init_queue(&alarm_queue,max_alarms+1,offsetof(ALARM,expire_time),0,
- compare_ulong,NullS);
- sigfillset(&full_signal_set); /* Neaded to block signals */
- pthread_mutex_init(&LOCK_alarm,MY_MUTEX_INIT_FAST);
- pthread_cond_init(&COND_alarm,NULL);
- #if THR_CLIENT_ALARM != SIGALRM || defined(USE_ALARM_THREAD)
- my_sigset(THR_CLIENT_ALARM,thread_alarm);
- #endif
- sigemptyset(&s);
- sigaddset(&s, THR_SERVER_ALARM);
- alarm_thread=pthread_self();
- #if defined(USE_ALARM_THREAD)
- {
- pthread_attr_t thr_attr;
- pthread_attr_init(&thr_attr);
- pthread_attr_setscope(&thr_attr,PTHREAD_SCOPE_PROCESS);
- pthread_attr_setdetachstate(&thr_attr,PTHREAD_CREATE_DETACHED);
- pthread_attr_setstacksize(&thr_attr,8196);
- my_pthread_attr_setprio(&thr_attr,100); /* Very high priority */
- VOID(pthread_create(&alarm_thread,&thr_attr,alarm_handler,NULL));
- VOID(pthread_attr_destroy(&thr_attr));
- }
- #elif defined(USE_ONE_SIGNAL_HAND)
- pthread_sigmask(SIG_BLOCK, &s, NULL); /* used with sigwait() */
- #if THR_SERVER_ALARM == THR_CLIENT_ALARM
- my_sigset(THR_CLIENT_ALARM,process_alarm); /* Linuxthreads */
- pthread_sigmask(SIG_UNBLOCK, &s, NULL);
- #endif
- #else
- my_sigset(THR_SERVER_ALARM, process_alarm);
- pthread_sigmask(SIG_UNBLOCK, &s, NULL);
- #endif
- DBUG_VOID_RETURN;
- }
- void resize_thr_alarm(uint max_alarms)
- {
- pthread_mutex_lock(&LOCK_alarm);
- /*
- It's ok not to shrink the queue as there may be more pending alarms than
- than max_alarms
- */
- if (alarm_queue.elements < max_alarms)
- resize_queue(&alarm_queue,max_alarms+1);
- pthread_mutex_unlock(&LOCK_alarm);
- }
- /*
- Request alarm after sec seconds.
- SYNOPSIS
- thr_alarm()
- alrm Pointer to alarm detection
- alarm_data Structure to store in alarm queue
- NOTES
- This function can't be called from the alarm-handling thread.
- RETURN VALUES
- 0 ok
- 1 If no more alarms are allowed (aborted by process)
- Stores in first argument a pointer to a non-zero int which is set to 0
- when the alarm has been given
- */
- my_bool thr_alarm(thr_alarm_t *alrm, uint sec, ALARM *alarm_data)
- {
- ulong now;
- sigset_t old_mask;
- my_bool reschedule;
- DBUG_ENTER("thr_alarm");
- DBUG_PRINT("enter",("thread: %s sec: %d",my_thread_name(),sec));
- now=(ulong) time((time_t*) 0);
- pthread_sigmask(SIG_BLOCK,&full_signal_set,&old_mask);
- pthread_mutex_lock(&LOCK_alarm); /* Lock from threads & alarms */
- if (alarm_aborted > 0)
- { /* No signal thread */
- DBUG_PRINT("info", ("alarm aborted"));
- *alrm= 0; /* No alarm */
- pthread_mutex_unlock(&LOCK_alarm);
- pthread_sigmask(SIG_SETMASK,&old_mask,NULL);
- DBUG_RETURN(1);
- }
- if (alarm_aborted < 0)
- sec= 1; /* Abort mode */
- if (alarm_queue.elements >= max_used_alarms)
- {
- if (alarm_queue.elements == alarm_queue.max_elements)
- {
- DBUG_PRINT("info", ("alarm queue full"));
- fprintf(stderr,"Warning: thr_alarm queue is fulln");
- *alrm= 0; /* No alarm */
- pthread_mutex_unlock(&LOCK_alarm);
- pthread_sigmask(SIG_SETMASK,&old_mask,NULL);
- DBUG_RETURN(1);
- }
- max_used_alarms=alarm_queue.elements+1;
- }
- reschedule= (!alarm_queue.elements ||
- (int) (((ALARM*) queue_top(&alarm_queue))->expire_time - now) >
- (int) sec);
- if (!alarm_data)
- {
- if (!(alarm_data=(ALARM*) my_malloc(sizeof(ALARM),MYF(MY_WME))))
- {
- DBUG_PRINT("info", ("failed my_malloc()"));
- *alrm= 0; /* No alarm */
- pthread_mutex_unlock(&LOCK_alarm);
- pthread_sigmask(SIG_SETMASK,&old_mask,NULL);
- DBUG_RETURN(1);
- }
- alarm_data->malloced=1;
- }
- else
- alarm_data->malloced=0;
- alarm_data->expire_time=now+sec;
- alarm_data->alarmed=0;
- alarm_data->thread=pthread_self();
- queue_insert(&alarm_queue,(byte*) alarm_data);
- /* Reschedule alarm if the current one has more than sec left */
- if (reschedule)
- {
- DBUG_PRINT("info", ("reschedule"));
- if (pthread_equal(pthread_self(),alarm_thread))
- alarm(sec); /* purecov: inspected */
- else
- reschedule_alarms(); /* Reschedule alarms */
- }
- pthread_mutex_unlock(&LOCK_alarm);
- pthread_sigmask(SIG_SETMASK,&old_mask,NULL);
- (*alrm)= &alarm_data->alarmed;
- DBUG_RETURN(0);
- }
- /*
- Remove alarm from list of alarms
- */
- void thr_end_alarm(thr_alarm_t *alarmed)
- {
- ALARM *alarm_data;
- sigset_t old_mask;
- uint i, found=0;
- DBUG_ENTER("thr_end_alarm");
- pthread_sigmask(SIG_BLOCK,&full_signal_set,&old_mask);
- pthread_mutex_lock(&LOCK_alarm);
- alarm_data= (ALARM*) ((byte*) *alarmed - offsetof(ALARM,alarmed));
- for (i=0 ; i < alarm_queue.elements ; i++)
- {
- if ((ALARM*) queue_element(&alarm_queue,i) == alarm_data)
- {
- queue_remove(&alarm_queue,i),MYF(0);
- if (alarm_data->malloced)
- my_free((gptr) alarm_data,MYF(0));
- found++;
- #ifdef DBUG_OFF
- break;
- #endif
- }
- }
- DBUG_ASSERT(!*alarmed || found == 1);
- if (!found)
- {
- if (*alarmed)
- fprintf(stderr,"Warning: Didn't find alarm 0x%lx in queue of %d alarmsn",
- (long) *alarmed, alarm_queue.elements);
- DBUG_PRINT("warning",("Didn't find alarm 0x%lx in queuen",
- (long) *alarmed));
- }
- pthread_mutex_unlock(&LOCK_alarm);
- pthread_sigmask(SIG_SETMASK,&old_mask,NULL);
- DBUG_VOID_RETURN;
- }
- /*
- Come here when some alarm in queue is due.
- Mark all alarms with are finnished in list.
- Shedule alarms to be sent again after 1-10 sec (many alarms at once)
- If alarm_aborted is set then all alarms are given and resent
- every second.
- */
- sig_handler process_alarm(int sig __attribute__((unused)))
- {
- sigset_t old_mask;
- /*
- This must be first as we can't call DBUG inside an alarm for a normal thread
- */
- #if THR_SERVER_ALARM == THR_CLIENT_ALARM
- if (!pthread_equal(pthread_self(),alarm_thread))
- {
- #if defined(MAIN) && !defined(__bsdi__)
- printf("thread_alarmn"); fflush(stdout);
- #endif
- #ifdef DONT_REMEMBER_SIGNAL
- my_sigset(THR_CLIENT_ALARM,process_alarm); /* int. thread system calls */
- #endif
- return;
- }
- #endif
- /*
- We have to do do the handling of the alarm in a sub function,
- because otherwise we would get problems with two threads calling
- DBUG_... functions at the same time (as two threads may call
- process_alarm() at the same time
- */
- #ifndef USE_ALARM_THREAD
- pthread_sigmask(SIG_SETMASK,&full_signal_set,&old_mask);
- pthread_mutex_lock(&LOCK_alarm);
- #endif
- process_alarm_part2(sig);
- #ifndef USE_ALARM_THREAD
- #if defined(DONT_REMEMBER_SIGNAL) && !defined(USE_ONE_SIGNAL_HAND)
- my_sigset(THR_SERVER_ALARM,process_alarm);
- #endif
- pthread_mutex_unlock(&LOCK_alarm);
- pthread_sigmask(SIG_SETMASK,&old_mask,NULL);
- #endif
- return;
- }
- static sig_handler process_alarm_part2(int sig __attribute__((unused)))
- {
- ALARM *alarm_data;
- DBUG_ENTER("process_alarm");
- DBUG_PRINT("info",("sig: %d active alarms: %d",sig,alarm_queue.elements));
- #if defined(MAIN) && !defined(__bsdi__)
- printf("process_alarmn"); fflush(stdout);
- #endif
- if (alarm_queue.elements)
- {
- if (alarm_aborted)
- {
- uint i;
- for (i=0 ; i < alarm_queue.elements ;)
- {
- alarm_data=(ALARM*) queue_element(&alarm_queue,i);
- alarm_data->alarmed=1; /* Info to thread */
- if (pthread_equal(alarm_data->thread,alarm_thread) ||
- pthread_kill(alarm_data->thread, THR_CLIENT_ALARM))
- {
- #ifdef MAIN
- printf("Warning: pthread_kill couldn't find thread!!!n");
- #endif
- queue_remove(&alarm_queue,i); /* No thread. Remove alarm */
- }
- else
- i++; /* Signal next thread */
- }
- #ifndef USE_ALARM_THREAD
- if (alarm_queue.elements)
- alarm(1); /* Signal soon again */
- #endif
- }
- else
- {
- ulong now=(ulong) time((time_t*) 0);
- ulong next=now+10-(now%10);
- while ((alarm_data=(ALARM*) queue_top(&alarm_queue))->expire_time <= now)
- {
- alarm_data->alarmed=1; /* Info to thread */
- DBUG_PRINT("info",("sending signal to waiting thread"));
- if (pthread_equal(alarm_data->thread,alarm_thread) ||
- pthread_kill(alarm_data->thread, THR_CLIENT_ALARM))
- {
- #ifdef MAIN
- printf("Warning: pthread_kill couldn't find thread!!!n");
- #endif
- queue_remove(&alarm_queue,0); /* No thread. Remove alarm */
- if (!alarm_queue.elements)
- break;
- }
- else
- {
- alarm_data->expire_time=next;
- queue_replaced(&alarm_queue);
- }
- }
- #ifndef USE_ALARM_THREAD
- if (alarm_queue.elements)
- {
- #ifdef __bsdi__
- alarm(0); /* Remove old alarm */
- #endif
- alarm((uint) (alarm_data->expire_time-now));
- }
- #endif
- }
- }
- DBUG_VOID_RETURN;
- }
- /*
- Schedule all alarms now and optionally free all structures
- SYNPOSIS
- end_thr_alarm()
- free_structures Set to 1 if we should free memory used for
- the alarm queue.
- When we call this we should KNOW that there
- is no active alarms
- IMPLEMENTATION
- Set alarm_abort to -1 which will change the behavior of alarms as follows:
- - All old alarms will be rescheduled at once
- - All new alarms will be rescheduled to one second
- */
- void end_thr_alarm(my_bool free_structures)
- {
- DBUG_ENTER("end_thr_alarm");
- if (alarm_aborted != 1) /* If memory not freed */
- {
- pthread_mutex_lock(&LOCK_alarm);
- DBUG_PRINT("info",("Resheduling %d waiting alarms",alarm_queue.elements));
- alarm_aborted= -1; /* mark aborted */
- if (alarm_queue.elements || (alarm_thread_running && free_structures))
- {
- if (pthread_equal(pthread_self(),alarm_thread))
- alarm(1); /* Shut down everything soon */
- else
- reschedule_alarms();
- }
- if (free_structures)
- {
- struct timespec abstime;
- /*
- The following test is just for safety, the caller should not
- depend on this
- */
- DBUG_ASSERT(!alarm_queue.elements);
- /* Wait until alarm thread dies */
- set_timespec(abstime, 10); /* Wait up to 10 seconds */
- while (alarm_thread_running)
- {
- int error= pthread_cond_timedwait(&COND_alarm, &LOCK_alarm, &abstime);
- if (error == ETIME || error == ETIMEDOUT)
- break; /* Don't wait forever */
- }
- if (!alarm_queue.elements)
- {
- delete_queue(&alarm_queue);
- alarm_aborted= 1;
- pthread_mutex_unlock(&LOCK_alarm);
- if (!alarm_thread_running) /* Safety */
- {
- pthread_mutex_destroy(&LOCK_alarm);
- pthread_cond_destroy(&COND_alarm);
- }
- }
- }
- else
- pthread_mutex_unlock(&LOCK_alarm);
- }
- DBUG_VOID_RETURN;
- }
- /*
- Remove another thread from the alarm
- */
- void thr_alarm_kill(pthread_t thread_id)
- {
- uint i;
- if (alarm_aborted)
- return;
- pthread_mutex_lock(&LOCK_alarm);
- for (i=0 ; i < alarm_queue.elements ; i++)
- {
- if (pthread_equal(((ALARM*) queue_element(&alarm_queue,i))->thread,
- thread_id))
- {
- ALARM *tmp=(ALARM*) queue_remove(&alarm_queue,i);
- tmp->expire_time=0;
- queue_insert(&alarm_queue,(byte*) tmp);
- reschedule_alarms();
- break;
- }
- }
- pthread_mutex_unlock(&LOCK_alarm);
- }
- void thr_alarm_info(ALARM_INFO *info)
- {
- pthread_mutex_lock(&LOCK_alarm);
- info->next_alarm_time= 0;
- info->max_used_alarms= max_used_alarms;
- if ((info->active_alarms= alarm_queue.elements))
- {
- ulong now=(ulong) time((time_t*) 0);
- long time_diff;
- ALARM *alarm_data= (ALARM*) queue_top(&alarm_queue);
- time_diff= (long) (alarm_data->expire_time - now);
- info->next_alarm_time= (ulong) (time_diff < 0 ? 0 : time_diff);
- }
- pthread_mutex_unlock(&LOCK_alarm);
- }
- /*
- This is here for thread to get interruptet from read/write/fcntl
- ARGSUSED
- */
- #if THR_CLIENT_ALARM != SIGALRM || defined(USE_ALARM_THREAD)
- static sig_handler thread_alarm(int sig)
- {
- #ifdef MAIN
- printf("thread_alarmn"); fflush(stdout);
- #endif
- #ifdef DONT_REMEMBER_SIGNAL
- my_sigset(sig,thread_alarm); /* int. thread system calls */
- #endif
- }
- #endif
- #ifdef HAVE_TIMESPEC_TS_SEC
- #define tv_sec ts_sec
- #define tv_nsec ts_nsec
- #endif
- /* set up a alarm thread with uses 'sleep' to sleep between alarms */
- #ifdef USE_ALARM_THREAD
- static void *alarm_handler(void *arg __attribute__((unused)))
- {
- int error;
- struct timespec abstime;
- #ifdef MAIN
- puts("Starting alarm thread");
- #endif
- my_thread_init();
- alarm_thread_running= 1;
- pthread_mutex_lock(&LOCK_alarm);
- for (;;)
- {
- if (alarm_queue.elements)
- {
- ulong sleep_time,now=time((time_t*) 0);
- if (alarm_aborted)
- sleep_time=now+1;
- else
- sleep_time= ((ALARM*) queue_top(&alarm_queue))->expire_time;
- if (sleep_time > now)
- {
- abstime.tv_sec=sleep_time;
- abstime.tv_nsec=0;
- if ((error=pthread_cond_timedwait(&COND_alarm,&LOCK_alarm,&abstime)) &&
- error != ETIME && error != ETIMEDOUT)
- {
- #ifdef MAIN
- printf("Got error: %d from ptread_cond_timedwait (errno: %d)n",
- error,errno);
- #endif
- }
- }
- }
- else if (alarm_aborted == -1)
- break;
- else if ((error=pthread_cond_wait(&COND_alarm,&LOCK_alarm)))
- {
- #ifdef MAIN
- printf("Got error: %d from ptread_cond_wait (errno: %d)n",
- error,errno);
- #endif
- }
- process_alarm(0);
- }
- bzero((char*) &alarm_thread,sizeof(alarm_thread)); /* For easy debugging */
- alarm_thread_running= 0;
- pthread_cond_signal(&COND_alarm);
- pthread_mutex_unlock(&LOCK_alarm);
- pthread_exit(0);
- return 0; /* Impossible */
- }
- #endif /* USE_ALARM_THREAD */
- /*****************************************************************************
- thr_alarm for OS/2
- *****************************************************************************/
- #elif defined(__EMX__) || defined(OS2)
- #define INCL_BASE
- #define INCL_NOPMAPI
- #include <os2.h>
- static pthread_mutex_t LOCK_alarm;
- static sigset_t full_signal_set;
- static QUEUE alarm_queue;
- pthread_t alarm_thread;
- #ifdef USE_ALARM_THREAD
- static pthread_cond_t COND_alarm;
- static void *alarm_handler(void *arg);
- #define reschedule_alarms() pthread_cond_signal(&COND_alarm)
- #else
- #define reschedule_alarms() pthread_kill(alarm_thread,THR_SERVER_ALARM)
- #endif
- sig_handler process_alarm(int sig __attribute__((unused)))
- {
- sigset_t old_mask;
- ALARM *alarm_data;
- DBUG_PRINT("info",("sig: %d active alarms: %d",sig,alarm_queue.elements));
- }
- /*
- Remove another thread from the alarm
- */
- void thr_alarm_kill(pthread_t thread_id)
- {
- uint i;
- pthread_mutex_lock(&LOCK_alarm);
- for (i=0 ; i < alarm_queue.elements ; i++)
- {
- if (pthread_equal(((ALARM*) queue_element(&alarm_queue,i))->thread,
- thread_id))
- {
- ALARM *tmp=(ALARM*) queue_remove(&alarm_queue,i);
- tmp->expire_time=0;
- queue_insert(&alarm_queue,(byte*) tmp);
- reschedule_alarms();
- break;
- }
- }
- pthread_mutex_unlock(&LOCK_alarm);
- }
- bool thr_alarm(thr_alarm_t *alrm, uint sec, ALARM *alarm)
- {
- APIRET rc;
- if (alarm_aborted)
- {
- alarm->alarmed.crono=0;
- alarm->alarmed.event=0;
- return 1;
- }
- if (rc = DosCreateEventSem(NULL,(HEV *) &alarm->alarmed.event,
- DC_SEM_SHARED,FALSE))
- {
- printf("Error creating event semaphore! [%d] n",rc);
- alarm->alarmed.crono=0;
- alarm->alarmed.event=0;
- return 1;
- }
- if (rc = DosAsyncTimer((long) sec*1000L, (HSEM) alarm->alarmed.event,
- (HTIMER *) &alarm->alarmed.crono))
- {
- printf("Error starting async timer! [%d] n",rc);
- DosCloseEventSem((HEV) alarm->alarmed.event);
- alarm->alarmed.crono=0;
- alarm->alarmed.event=0;
- return 1;
- } /* endif */
- (*alrm)= &alarm->alarmed;
- return 1;
- }
- bool thr_got_alarm(thr_alarm_t *alrm_ptr)
- {
- thr_alarm_t alrm= *alrm_ptr;
- APIRET rc;
- if (alrm->crono)
- {
- rc = DosWaitEventSem((HEV) alrm->event, SEM_IMMEDIATE_RETURN);
- if (rc == 0) {
- DosCloseEventSem((HEV) alrm->event);
- alrm->crono = 0;
- alrm->event = 0;
- } /* endif */
- }
- return !alrm->crono || alarm_aborted;
- }
- void thr_end_alarm(thr_alarm_t *alrm_ptr)
- {
- thr_alarm_t alrm= *alrm_ptr;
- if (alrm->crono)
- {
- DosStopTimer((HTIMER) alrm->crono);
- DosCloseEventSem((HEV) alrm->event);
- alrm->crono = 0;
- alrm->event = 0;
- }
- }
- void end_thr_alarm(my_bool free_structures)
- {
- DBUG_ENTER("end_thr_alarm");
- alarm_aborted=1; /* No more alarms */
- DBUG_VOID_RETURN;
- }
- void init_thr_alarm(uint max_alarm)
- {
- DBUG_ENTER("init_thr_alarm");
- alarm_aborted=0; /* Yes, Gimmie alarms */
- DBUG_VOID_RETURN;
- }
- void thr_alarm_info(ALARM_INFO *info)
- {
- bzero((char*) info, sizeof(*info));
- }
- void resize_thr_alarm(uint max_alarms)
- {
- }
- /*****************************************************************************
- thr_alarm for win95
- *****************************************************************************/
- #else /* __WIN__ */
- void thr_alarm_kill(pthread_t thread_id)
- {
- /* Can't do this yet */
- }
- sig_handler process_alarm(int sig __attribute__((unused)))
- {
- /* Can't do this yet */
- }
- my_bool thr_alarm(thr_alarm_t *alrm, uint sec, ALARM *alarm)
- {
- (*alrm)= &alarm->alarmed;
- if (alarm_aborted)
- {
- alarm->alarmed.crono=0;
- return 1;
- }
- if (!(alarm->alarmed.crono=SetTimer((HWND) NULL,0, sec*1000,
- (TIMERPROC) NULL)))
- return 1;
- return 0;
- }
- bool thr_got_alarm(thr_alarm_t *alrm_ptr)
- {
- thr_alarm_t alrm= *alrm_ptr;
- MSG msg;
- if (alrm->crono)
- {
- PeekMessage(&msg,NULL,WM_TIMER,WM_TIMER,PM_REMOVE) ;
- if (msg.message == WM_TIMER || alarm_aborted)
- {
- KillTimer(NULL, alrm->crono);
- alrm->crono = 0;
- }
- }
- return !alrm->crono || alarm_aborted;
- }
- void thr_end_alarm(thr_alarm_t *alrm_ptr)
- {
- thr_alarm_t alrm= *alrm_ptr;
- /* alrm may be zero if thr_alarm aborted with an error */
- if (alrm && alrm->crono)
- {
- KillTimer(NULL, alrm->crono);
- alrm->crono = 0;
- }
- }
- void end_thr_alarm(my_bool free_structures)
- {
- DBUG_ENTER("end_thr_alarm");
- alarm_aborted=1; /* No more alarms */
- DBUG_VOID_RETURN;
- }
- void init_thr_alarm(uint max_alarm)
- {
- DBUG_ENTER("init_thr_alarm");
- alarm_aborted=0; /* Yes, Gimmie alarms */
- DBUG_VOID_RETURN;
- }
- void thr_alarm_info(ALARM_INFO *info)
- {
- bzero((char*) info, sizeof(*info));
- }
- void resize_thr_alarm(uint max_alarms)
- {
- }
- #endif /* __WIN__ */
- #endif /* THREAD */
- /****************************************************************************
- Handling of test case (when compiled with -DMAIN)
- ***************************************************************************/
- #ifdef MAIN
- #if defined(THREAD) && !defined(DONT_USE_THR_ALARM)
- static pthread_cond_t COND_thread_count;
- static pthread_mutex_t LOCK_thread_count;
- static uint thread_count;
- #ifdef HPUX10
- typedef int * fd_set_ptr;
- #else
- typedef fd_set * fd_set_ptr;
- #endif /* HPUX10 */
- static void *test_thread(void *arg)
- {
- int i,param=*((int*) arg),wait_time,retry;
- time_t start_time;
- thr_alarm_t got_alarm;
- fd_set fd;
- FD_ZERO(&fd);
- my_thread_init();
- printf("Thread %d (%s) startedn",param,my_thread_name()); fflush(stdout);
- for (i=1 ; i <= 10 ; i++)
- {
- wait_time=param ? 11-i : i;
- start_time=time((time_t*) 0);
- if (thr_alarm(&got_alarm,wait_time,0))
- {
- printf("Thread: %s Alarms abortedn",my_thread_name());
- break;
- }
- if (wait_time == 3)
- {
- printf("Thread: %s Simulation of no alarm neededn",my_thread_name());
- fflush(stdout);
- }
- else
- {
- for (retry=0 ; !thr_got_alarm(&got_alarm) && retry < 10 ; retry++)
- {
- printf("Thread: %s Waiting %d secn",my_thread_name(),wait_time);
- select(0,(fd_set_ptr) &fd,0,0,0);
- }
- if (!thr_got_alarm(&got_alarm))
- {
- printf("Thread: %s didn't get an alarm. Aborting!n",
- my_thread_name());
- break;
- }
- if (wait_time == 7)
- { /* Simulate alarm-miss */
- fd_set readFDs;
- uint max_connection=fileno(stdin);
- FD_ZERO(&readFDs);
- FD_SET(max_connection,&readFDs);
- retry=0;
- for (;;)
- {
- printf("Thread: %s Simulating alarm missn",my_thread_name());
- fflush(stdout);
- if (select(max_connection+1, (fd_set_ptr) &readFDs,0,0,0) < 0)
- {
- if (errno == EINTR)
- break; /* Got new interrupt */
- printf("Got errno: %d from select. Retrying..n",errno);
- if (retry++ >= 3)
- {
- printf("Warning: Interrupt of select() doesn't set errno!n");
- break;
- }
- }
- else /* This shouldn't happen */
- {
- if (!FD_ISSET(max_connection,&readFDs))
- {
- printf("Select interrupted, but errno not setn");
- fflush(stdout);
- if (retry++ >= 3)
- break;
- continue;
- }
- VOID(getchar()); /* Somebody was playing */
- }
- }
- }
- }
- printf("Thread: %s Slept for %d (%d) secn",my_thread_name(),
- (int) (time((time_t*) 0)-start_time), wait_time); fflush(stdout);
- thr_end_alarm(&got_alarm);
- fflush(stdout);
- }
- pthread_mutex_lock(&LOCK_thread_count);
- thread_count--;
- VOID(pthread_cond_signal(&COND_thread_count)); /* Tell main we are ready */
- pthread_mutex_unlock(&LOCK_thread_count);
- free((gptr) arg);
- return 0;
- }
- #ifdef USE_ONE_SIGNAL_HAND
- static sig_handler print_signal_warning(int sig)
- {
- printf("Warning: Got signal %d from thread %sn",sig,my_thread_name());
- fflush(stdout);
- #ifdef DONT_REMEMBER_SIGNAL
- my_sigset(sig,print_signal_warning); /* int. thread system calls */
- #endif
- #ifndef OS2
- if (sig == SIGALRM)
- alarm(2); /* reschedule alarm */
- #endif
- }
- #endif /* USE_ONE_SIGNAL_HAND */
- static void *signal_hand(void *arg __attribute__((unused)))
- {
- sigset_t set;
- int sig,error,err_count=0;;
- my_thread_init();
- pthread_detach_this_thread();
- init_thr_alarm(10); /* Setup alarm handler */
- pthread_mutex_lock(&LOCK_thread_count); /* Required by bsdi */
- VOID(pthread_cond_signal(&COND_thread_count)); /* Tell main we are ready */
- pthread_mutex_unlock(&LOCK_thread_count);
- #ifndef OS2
- sigemptyset(&set); /* Catch all signals */
- sigaddset(&set,SIGINT);
- sigaddset(&set,SIGQUIT);
- sigaddset(&set,SIGTERM);
- #if THR_CLIENT_ALARM != SIGHUP
- sigaddset(&set,SIGHUP);
- #endif
- #ifdef SIGTSTP
- sigaddset(&set,SIGTSTP);
- #endif
- #ifdef USE_ONE_SIGNAL_HAND
- sigaddset(&set,THR_SERVER_ALARM); /* For alarms */
- puts("Starting signal and alarm handling thread");
- #else
- puts("Starting signal handling thread");
- #endif
- #endif /* OS2 */
- printf("server alarm: %d thread alarm: %dn",
- THR_SERVER_ALARM,THR_CLIENT_ALARM);
- DBUG_PRINT("info",("Starting signal and alarm handling thread"));
- for(;;)
- {
- while ((error=my_sigwait(&set,&sig)) == EINTR)
- printf("sigwait restartedn");
- if (error)
- {
- fprintf(stderr,"Got error %d from sigwaitn",error);
- if (err_count++ > 5)
- exit(1); /* Too many errors in test */
- continue;
- }
- #ifdef USE_ONE_SIGNAL_HAND
- if (sig != THR_SERVER_ALARM)
- #endif
- printf("Main thread: Got signal %dn",sig);
- switch (sig) {
- case SIGINT:
- case SIGQUIT:
- case SIGTERM:
- #ifndef OS2
- case SIGHUP:
- #endif
- printf("Aborting nicelyn");
- end_thr_alarm(0);
- break;
- #ifdef SIGTSTP
- case SIGTSTP:
- printf("Abortingn");
- exit(1);
- return 0; /* Keep some compilers happy */
- #endif
- #ifndef OS2
- #ifdef USE_ONE_SIGNAL_HAND
- case THR_SERVER_ALARM:
- process_alarm(sig);
- break;
- #endif
- #endif /* OS2 */
- }
- }
- }
- int main(int argc __attribute__((unused)),char **argv __attribute__((unused)))
- {
- pthread_t tid;
- pthread_attr_t thr_attr;
- int i,*param,error;
- sigset_t set;
- ALARM_INFO alarm_info;
- MY_INIT(argv[0]);
- if (argc > 1 && argv[1][0] == '-' && argv[1][1] == '#')
- DBUG_PUSH(argv[1]+2);
- pthread_mutex_init(&LOCK_thread_count,MY_MUTEX_INIT_FAST);
- pthread_cond_init(&COND_thread_count,NULL);
- /* Start a alarm handling thread */
- #ifndef OS2
- sigemptyset(&set);
- sigaddset(&set,SIGINT);
- sigaddset(&set,SIGQUIT);
- sigaddset(&set,SIGTERM);
- sigaddset(&set,SIGHUP);
- signal(SIGTERM,SIG_DFL); /* If it's blocked by parent */
- #ifdef SIGTSTP
- sigaddset(&set,SIGTSTP);
- #endif
- sigaddset(&set,THR_SERVER_ALARM);
- sigdelset(&set,THR_CLIENT_ALARM);
- (void) pthread_sigmask(SIG_SETMASK,&set,NULL);
- #ifdef NOT_USED
- sigemptyset(&set);
- sigaddset(&set,THR_CLIENT_ALARM);
- VOID(pthread_sigmask(SIG_UNBLOCK, &set, (sigset_t*) 0));
- #endif
- #endif /* OS2 */
- pthread_attr_init(&thr_attr);
- pthread_attr_setscope(&thr_attr,PTHREAD_SCOPE_PROCESS);
- pthread_attr_setdetachstate(&thr_attr,PTHREAD_CREATE_DETACHED);
- pthread_attr_setstacksize(&thr_attr,65536L);
- /* Start signal thread and wait for it to start */
- VOID(pthread_mutex_lock(&LOCK_thread_count));
- pthread_create(&tid,&thr_attr,signal_hand,NULL);
- VOID(pthread_cond_wait(&COND_thread_count,&LOCK_thread_count));
- VOID(pthread_mutex_unlock(&LOCK_thread_count));
- DBUG_PRINT("info",("signal thread created"));
- thr_setconcurrency(3);
- pthread_attr_setscope(&thr_attr,PTHREAD_SCOPE_PROCESS);
- printf("Main thread: %sn",my_thread_name());
- for (i=0 ; i < 2 ; i++)
- {
- param=(int*) malloc(sizeof(int));
- *param= i;
- pthread_mutex_lock(&LOCK_thread_count);
- if ((error=pthread_create(&tid,&thr_attr,test_thread,(void*) param)))
- {
- printf("Can't create thread %d, error: %dn",i,error);
- exit(1);
- }
- thread_count++;
- pthread_mutex_unlock(&LOCK_thread_count);
- }
- pthread_attr_destroy(&thr_attr);
- pthread_mutex_lock(&LOCK_thread_count);
- thr_alarm_info(&alarm_info);
- printf("Main_thread: Alarms: %u max_alarms: %u next_alarm_time: %lun",
- alarm_info.active_alarms, alarm_info.max_used_alarms,
- alarm_info.next_alarm_time);
- while (thread_count)
- {
- VOID(pthread_cond_wait(&COND_thread_count,&LOCK_thread_count));
- if (thread_count == 1)
- {
- printf("Calling end_thr_alarm. This should cancel the last threadn");
- end_thr_alarm(0);
- }
- }
- pthread_mutex_unlock(&LOCK_thread_count);
- end_thr_alarm(1);
- thr_alarm_info(&alarm_info);
- printf("Main_thread: Alarms: %u max_alarms: %u next_alarm_time: %lun",
- alarm_info.active_alarms, alarm_info.max_used_alarms,
- alarm_info.next_alarm_time);
- printf("Test succeededn");
- return 0;
- }
- #else /* THREAD */
- int main(int argc __attribute__((unused)),char **argv __attribute__((unused)))
- {
- #ifndef THREAD
- printf("thr_alarm disabled because we are not using threadsn");
- #else
- printf("thr_alarm disabled with DONT_USE_THR_ALARMn");
- #endif
- exit(1);
- }
- #endif /* THREAD */
- #endif /* MAIN */