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Add support for priority inheritance on the low priority worker queue

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This commit is contained in:
Gregory Nutt
2014-10-07 07:41:52 -06:00
parent 03b0dc12c7
commit d7843c8e24
5 changed files with 428 additions and 10 deletions
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include/nuttx/wqueue.h
+43 -1
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@@ -1,7 +1,7 @@
/****************************************************************************
* include/nuttx/wqueue.h
*
* Copyright (C) 2009, 2011-2013 Gregory Nutt. All rights reserved.
* Copyright (C) 2009, 2011-2014 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
@@ -486,6 +486,48 @@ int work_signal(int qid);
#define work_available(work) ((work)->worker == NULL)
/****************************************************************************
* Name: lpwork_boostpriority
*
* Description:
* Called by the work queue client to assure that the priority of the low-
* priority worker thread is at least at the requested level, reqprio. This
* function would normally be called just before calling work_queue().
*
* Parameters:
* reqprio - Requested minimum worker thread priority
*
* Return Value:
* None
*
****************************************************************************/
#if defined(CONFIG_SCHED_LPWORK) && defined(CONFIG_PRIORITY_INHERITANCE)
void lpwork_boostpriority(uint8_t reqprio);
#endif
/****************************************************************************
* Name: lpwork_restorepriority
*
* Description:
* This function is called to restore the priority after it was previously
* boosted. This is often done by client logic on the worker thread when
* the scheduled work completes. It will check if we need to drop the
* priority of the worker thread.
*
* Parameters:
* reqprio - Previously requested minimum worker thread priority to be
* "unboosted"
*
* Return Value:
* None
*
****************************************************************************/
#if defined(CONFIG_SCHED_LPWORK) && defined(CONFIG_PRIORITY_INHERITANCE)
void lpwork_restorepriority(uint8_t reqprio);
#endif
#undef EXTERN
#ifdef __cplusplus
}