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Add support for priority inheritance

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1581 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo
2009-03-08 23:33:41 +00:00
parent 84ec1dd3a3
commit 6b22b2c441
6 changed files with 135 additions and 39 deletions
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arch/sh/src/common/up_reprioritizertr.c
+20 -4
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@@ -1,7 +1,7 @@
/****************************************************************************
* arch/sh/src/common/up_reprioritizertr.c
*
* Copyright (C) 2008 Gregory Nutt. All rights reserved.
* Copyright (C) 2008-2009 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* Redistribution and use in source and binary forms, with or without
@@ -85,14 +85,27 @@ void up_reprioritize_rtr(_TCB *tcb, ubyte priority)
{
/* Verify that the caller is sane */
if (tcb->task_state < FIRST_READY_TO_RUN_STATE ||
tcb->task_state > LAST_READY_TO_RUN_STATE ||
priority < SCHED_PRIORITY_MIN ||
#if CONFIG_DEBUG /* We only check parameters when debug is enabled */
if (priority < SCHED_PRIORITY_MIN ||
priority > SCHED_PRIORITY_MAX)
{
PANIC(OSERR_BADREPRIORITIZESTATE);
}
else
#endif
if (tcb->task_state < FIRST_READY_TO_RUN_STATE ||
tcb->task_state > LAST_READY_TO_RUN_STATE)
{
/* This is a hack and needs to be fixed.. here some taks is reprioritizing
* another task that is not running. Here we just set the priority of
* the task -- BUT some of the other states are also prioritized and the
* waiting task should also be re-ordered in the prioritized wiating list.
* As a consequence, the other task is still waiting at the lower priority.
*/
tcb->sched_priority = priority;
}
else
{
_TCB *rtcb = (_TCB*)g_readytorun.head;
boolean switch_needed;
@@ -109,6 +122,9 @@ void up_reprioritize_rtr(_TCB *tcb, ubyte priority)
/* Setup up the new task priority */
tcb->sched_priority = (ubyte)priority;
#ifdef CONFIG_PRIORITY_INHERITANCE
tcb->base_priority = (ubyte)priority;
#endif
/* Return the task to the specified blocked task list.
* sched_addreadytorun will return TRUE if the task was