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Add on_exit(); Re-order some logic in the task shutdown sequence. Sometimes some complex logic needs to execute when closing file descriptors and this needs to happen early while the task is still healthy

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git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@4354 7fd9a85b-ad96-42d3-883c-3090e2eb8679
This commit is contained in:
patacongo
2012-01-31 23:39:12 +00:00
parent ed4ee27f70
commit 35a1f247c4
13 changed files with 267 additions and 84 deletions
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nuttx/sched/task_exithook.c
+33 -19
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@@ -1,8 +1,8 @@
/****************************************************************************
* sched/task_exithook.c
*
* Copyright (C) 2011 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
* Copyright (C) 2011-2012 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@@ -106,18 +106,23 @@ void task_exithook(FAR _TCB *tcb, int status)
sched_note_stop(tcb);
/* Flush all streams (File descriptors will be closed when
* the TCB is deallocated).
/* If an exit function was registered, call it now before we do any un-
* initialized. NOTE: In the case of task_delete(), the exit function
* will *not* be called on the thread execution of the task being deleted!
*/
#if CONFIG_NFILE_STREAMS > 0
(void)lib_flushall(tcb->streams);
#ifdef CONFIG_SCHED_ATEXIT
if (tcb->atexitfunc)
{
(*tcb->atexitfunc)();
}
#endif
/* Deallocate anything left in the TCB's queues */
#ifndef CONFIG_DISABLE_SIGNALS
sig_cleanup(tcb); /* Deallocate Signal lists */
#ifdef CONFIG_SCHED_ONEXIT
if (tcb->onexitfunc)
{
(*tcb->onexitfunc)(status, tcb->onexitarg);
}
#endif
/* Wakeup any tasks waiting for this task to exit */
@@ -142,16 +147,25 @@ void task_exithook(FAR _TCB *tcb, int status)
sem_post(&tcb->exitsem);
}
#endif
/* If an exit function was registered, call it now. NOTE: In the case
* of task_delete(), the exit function will *not* be called on the thread
* execution of the task being deleted!
/* Flush all streams (File descriptors will be closed when
* the TCB is deallocated).
*/
#ifdef CONFIG_SCHED_ATEXIT
if (tcb->exitfunc)
{
(*tcb->exitfunc)();
}
#if CONFIG_NFILE_STREAMS > 0
(void)lib_flushall(tcb->streams);
#endif
/* Free all file-related resources now. This gets called again
* just be be certain when the TCB is delallocated. However, we
* really need to close files as soon as possible while we still
* have a functioning task.
*/
(void)sched_releasefiles(tcb);
/* Deallocate anything left in the TCB's queues */
#ifndef CONFIG_DISABLE_SIGNALS
sig_cleanup(tcb); /* Deallocate Signal lists */
#endif
}