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monty@mashka.mysql.fi 2003-10-15 16:55:24 +03:00
parent 35c09b8082
commit 4897c6649d
2 changed files with 29 additions and 5 deletions
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26
mysys/queues.c
View file

@ -61,6 +61,24 @@ int reinit_queue(QUEUE *queue, uint max_elements, uint offset_to_key,
DBUG_RETURN(0);
}
/*
Resize queue
SYNOPSIS
resize_queue()
queue Queue
max_elements New max size for queue
NOTES
If you resize queue to be less than the elements you have in it,
the extra elements will be deleted
RETURN
0 ok
1 Error. In this case the queue is unchanged
*/
int resize_queue(QUEUE *queue, uint max_elements)
{
byte **new_root;
@ -68,14 +86,16 @@ int resize_queue(QUEUE *queue, uint max_elements)
if (queue->max_elements == max_elements)
DBUG_RETURN(0);
if ((new_root= (byte **) my_realloc((void *)queue->root,
(max_elements+1)*sizeof(void*), MYF(MY_WME))) == 0)
(max_elements+1)*sizeof(void*),
MYF(MY_WME))) == 0)
DBUG_RETURN(1);
set_if_smaller(queue->elements, max_elements);
queue->max_elements=max_elements;
queue->root=new_root;
queue->max_elements= max_elements;
queue->root= new_root;
DBUG_RETURN(0);
}
void delete_queue(QUEUE *queue)
{
DBUG_ENTER("delete_queue");

8
mysys/thr_alarm.c
View file

@ -120,16 +120,20 @@ void init_thr_alarm(uint max_alarms)
DBUG_VOID_RETURN;
}
void resize_thr_alarm(uint max_alarms)
{
pthread_mutex_lock(&LOCK_alarm);
/* it's ok not to shrink the queue sometimes */
/*
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);
return;
}
/*
Request alarm after sec seconds.