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Simultaneous exit/thread_destroy working

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Reiterating again to simplify:

Working:
 - Pager issues destroy, client also issues exit
   they work in sync.

Missing
 - Pager killing itself
 - Pager killing all children while killing itself
 - Pager waiting on children
This commit is contained in:
Bahadir Balban
2009-10-31 18:45:22 +02:00
parent 09197d1fb1
commit 638df9e238
5 changed files with 42 additions and 81 deletions
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27
src/generic/scheduler.c
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@@ -229,7 +229,7 @@ void sched_resume_async(struct ktcb *task)
* A self-paging thread deletes itself,
* schedules and disappears from the system.
*/
void sched_pager_exit(void)
void sched_exit_pager(void)
{
// printk("Pager (%d) Exiting...\n", current->tid);
/* Remove from its list, callers get -ESRCH */
@@ -269,13 +269,6 @@ void sched_exit_sync(void)
{
struct ktcb *pager = tcb_find(current->pagerid);
/* Quit global list */
tcb_remove(current);
/* Wake up waiters */
wake_up_all(&current->wqh_send, 0);
wake_up_all(&current->wqh_recv, 0);
/* Go to exit list */
ktcb_list_add(current, &pager->child_exit_list);
@@ -285,8 +278,8 @@ void sched_exit_sync(void)
wake_up(&current->wqh_pager, 0);
sched_rq_remove_task(current);
current->state = TASK_INACTIVE;
current->flags &= ~TASK_SUSPENDING;
current->state = TASK_DEAD;
current->flags &= ~TASK_EXITING;
preempt_enable();
/* Quit */
@@ -294,16 +287,6 @@ void sched_exit_sync(void)
BUG();
}
/*
* TODO:
* Instead of sched_suspend_sync()
* call sched_die_sync() on killer suspends:
* (e.g. if also kill flag set, call sched_die_sync instead)
* and handle dying on its own and dying over a pager
* in there. (e.g. put yourself in a task_dead queue, take
* care of pager calling destroy on you, calling wait on you etc.)
*/
/*
* NOTE: Could do these as sched_prepare_suspend()
* + schedule() or need_resched = 1
@@ -328,12 +311,10 @@ void sched_suspend_async(void)
sched_rq_remove_task(current);
current->state = TASK_INACTIVE;
current->flags &= ~TASK_SUSPENDING;
/* This will make sure we yield soon */
preempt_enable();
if (current->pagerid != current->tid)
wake_up_task(tcb_find(current->pagerid), 0);
wake_up(&current->wqh_pager, 0);
need_resched = 1;
}