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https://github.com/apache/nuttx.git
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Implement user-mode work queues
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5712 42af7a65-404d-4744-a932-0658087f49c3
This commit is contained in:
patacongo
+211
-47
@@ -61,6 +61,10 @@
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* (which runs at the lowest of priority and may not be appropriate
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* if memory reclamation is of high priority). If CONFIG_SCHED_WORKQUEUE
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* is enabled, then the following options can also be used:
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* CONFIG_SCHED_HPWORK - Build the high priority work queue. To preserve
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* legacy behavior, CONFIG_SCHED_HPWORK is assumed to be true in a flat
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* build (CONFIG_SCHED_KERNEL=n) but must be defined in kernel mode
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* in order to build the high priority work queue.
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* CONFIG_SCHED_WORKPRIORITY - The execution priority of the worker
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* thread. Default: 192
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* CONFIG_SCHED_WORKPERIOD - How often the worker thread checks for
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@@ -83,23 +87,85 @@
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* priority worker thread. Default: CONFIG_IDLETHREAD_STACKSIZE.
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*/
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/* Is this a kernel build (CONFIG_NUTTX_KERNEL=y) */
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#ifdef CONFIG_NUTTX_KERNEL
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/* Yes.. kernel worker threads are not built in a kernel build when we are
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* building the user-space libraries.
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*/
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# ifndef __KERNEL__
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# undef CONFIG_SCHED_HPWORK
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# undef CONFIG_SCHED_LPWORK
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/* User-space worker threads are not built in a kernel build when we are
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* building the kernel-space libraries.
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*/
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# else
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# undef CONFIG_SCHED_USRWORK
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# endif
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/* User-space worker threads are not built in a flat build
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* (CONFIG_NUTTX_KERNEL=n)
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*/
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#else
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/* To preserve legacy behavior, CONFIG_SCHED_HPWORK is assumed to be true
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* in a flat build (CONFIG_SCHED_KERNEL=n) but must be defined in kernel
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* mode in order to build the high priority work queue.
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*/
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# undef CONFIG_SCHED_HPWORK
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# undef CONFIG_SCHED_USRWORK
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# define CONFIG_SCHED_HPWORK 1
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#endif
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/* We never build the low priority work queue without building the high
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* priority work queue.
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*/
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#if defined(CONFIG_SCHED_LPWORK) && !defined(CONFIG_SCHED_HPWORK)
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# error "CONFIG_SCHED_LPWORK defined, but CONFIG_SCHED_HPWORK not defined"
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# undef CONFIG_SCHED_LPWORK
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#endif
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/* We might not be building any work queue support in this context */
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#if !defined(CONFIG_SCHED_HPWORK) && !defined(CONFIG_SCHED_LPWORK) && !defined(CONFIG_SCHED_USRWORK)
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# undef CONFIG_SCHED_WORKQUEUE
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#endif
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#ifdef CONFIG_SCHED_WORKQUEUE
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/* We are building work queues... Work queues need signal support */
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#if defined(CONFIG_SCHED_WORKQUEUE) && defined(CONFIG_DISABLE_SIGNALS)
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# warning "Worker thread support requires signals"
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#endif
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#ifndef CONFIG_SCHED_WORKPRIORITY
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# define CONFIG_SCHED_WORKPRIORITY 192
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#endif
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/* High priority, kernel work queue configuration ***************************/
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#ifndef CONFIG_SCHED_WORKPERIOD
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# define CONFIG_SCHED_WORKPERIOD (50*1000) /* 50 milliseconds */
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#endif
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#ifdef CONFIG_SCHED_HPWORK
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#ifndef CONFIG_SCHED_WORKSTACKSIZE
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# define CONFIG_SCHED_WORKSTACKSIZE CONFIG_IDLETHREAD_STACKSIZE
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#endif
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# ifndef CONFIG_SCHED_WORKPRIORITY
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# define CONFIG_SCHED_WORKPRIORITY 192
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# endif
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# ifndef CONFIG_SCHED_WORKPERIOD
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# define CONFIG_SCHED_WORKPERIOD (50*1000) /* 50 milliseconds */
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# endif
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# ifndef CONFIG_SCHED_WORKSTACKSIZE
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# define CONFIG_SCHED_WORKSTACKSIZE CONFIG_IDLETHREAD_STACKSIZE
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# endif
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/* Low priority kernel work queue configuration *****************************/
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#ifdef CONFIG_SCHED_LPWORK
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# ifndef CONFIG_SCHED_LPWORKPRIORITY
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# define CONFIG_SCHED_LPWORKPRIORITY 50
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# endif
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@@ -111,44 +177,88 @@
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# ifndef CONFIG_SCHED_LPWORKSTACKSIZE
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# define CONFIG_SCHED_LPWORKSTACKSIZE CONFIG_IDLETHREAD_STACKSIZE
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# endif
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#endif
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/* How many worker threads are there? */
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#ifdef CONFIG_SCHED_LPWORK
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# define NWORKERS 2
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#else
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# define NWORKERS 1
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#endif
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/* Work queue IDs (indices):
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*
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* Kernel Work Queues:
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* HPWORK: This ID of the high priority work queue that should only be used for
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* hi-priority, time-critical, driver bottom-half functions.
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*
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* LPWORK: This is the ID of the low priority work queue that can be used for any
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* purpose. if CONFIG_SCHED_LPWORK is not defined, then there is only one kernel
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* work queue and LPWORK == HPWORK.
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*
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* User Work Queue:
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* USRWORK: CONFIG_NUTTX_KERNEL and CONFIG_SCHED_USRWORK are defined, then NuttX
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* will also support a user-accessible work queue. Otherwise, USRWORK == LPWORK.
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/* The high priority worker thread should be higher priority than the low
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* priority worker thread.
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*/
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#define HPWORK 0
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#ifdef CONFIG_SCHED_LPWORK
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# define LPWORK (HPWORK+1)
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#else
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# define LPWORK HPWORK
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#if CONFIG_SCHED_LPWORKPRIORITY > CONFIG_SCHED_WORKPRIORITY
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# warning "The Lower priority worker thread has the higher priority"
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#endif
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#if defined(CONFIG_NUTTX_KERNEL) && defined(CONFIG_SCHED_USRWORK)
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# warning "Feature not implemented"
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# define USRWORK (LPWORK+1)
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#endif /* CONFIG_SCHED_LPWORK */
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#endif /* CONFIG_SCHED_HPWORK */
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/* User space work queue configuration **************************************/
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#ifdef CONFIG_SCHED_USRWORK
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# ifndef CONFIG_SCHED_USRWORKPRIORITY
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# define CONFIG_SCHED_USRWORKPRIORITY 50
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# endif
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# ifndef CONFIG_SCHED_USRWORKPERIOD
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# define CONFIG_SCHED_USRWORKPERIOD (50*1000) /* 50 milliseconds */
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# endif
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# ifndef CONFIG_SCHED_USRWORKSTACKSIZE
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# define CONFIG_SCHED_USRWORKSTACKSIZE CONFIG_IDLETHREAD_STACKSIZE
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# endif
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#endif /* CONFIG_SCHED_USRWORK */
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/* How many worker threads are there? In the user-space phase of a kernel
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* build, there will be no more than one.
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*
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* Work queue IDs (indices):
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*
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* Kernel Work Queues: There are none and any attempts to use them
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* should generate errors.
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*
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* User Work Queue: Will be available if CONFIG_SCHED_USRWORK is defined
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*/
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#if defined(CONFIG_NUTTX_KERNEL) && !defined(__KERNEL__)
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# ifdef CONFIG_SCHED_USRWORK
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# define NWORKERS 1
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# define USRWORK 0
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# endif
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#else
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# define USRWORK LPWORK
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#endif
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/* In a flat build (CONFIG_NUTTX_KERNEL=n) or during the kernel phase of
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* the kernel build, there may be 0, 1, or 2 work queues.
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*
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* Work queue IDs (indices):
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*
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* Kernel Work Queues:
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* HPWORK: This ID of the high priority work queue that should only be
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* used for hi-priority, time-critical, driver bottom-half functions.
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*
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* LPWORK: This is the ID of the low priority work queue that can be
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* used for any purpose. if CONFIG_SCHED_LPWORK is not defined, then
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* there is only one kernel work queue and LPWORK == HPWORK.
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*
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* User Work Queue:
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* USRWORK: In the kernel phase a a kernel build, there should be no
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* references to user-space work queues. That would be an error.
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* Otherwise, in a flat build, user applications will use the lower
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* priority work queue (if there is one).
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*/
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# define HPWORK 0
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# ifdef CONFIG_SCHED_LPWORK
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# define LPWORK (HPWORK+1)
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# define NWORKERS 2
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# else
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# define LPWORK HPWORK
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# define NWORKERS 1
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# endif
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# ifndef CONFIG_NUTTX_KERNEL
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# define USRWORK LPWORK
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# endif
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#endif /* CONFIG_NUTTX_KERNEL && !__KERNEL__ */
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/****************************************************************************
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* Public Types
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@@ -202,22 +312,50 @@ extern "C"
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* logic.
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*/
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#ifdef CONFIG_NUTTX_KERNEL
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/* Play some games in the kernel mode build to assure that different
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* naming is used for the global work queue data structures. This may
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* not be necessary but it safer.
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*/
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# ifdef __KERNEL__
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EXTERN struct wqueue_s g_kernelwork[NWORKERS];
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# define g_work g_kernelwork
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# else
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EXTERN struct wqueue_s g_usrwork[NWORKERS];
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# define g_work g_usrwork
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# endif
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#else /* CONFIG_NUTTX_KERNEL */
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EXTERN struct wqueue_s g_work[NWORKERS];
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#endif /* CONFIG_NUTTX_KERNEL */
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Name: work_hpthread and work_lpthread
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* Name: work_hpthread, work_lpthread, and work_usrthread
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*
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* Description:
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* These are the main worker threads that performs actions placed on the
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* work lists. One thread also performs periodic garbage collection (that
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* is performed by the idle thread if CONFIG_SCHED_WORKQUEUE is not defined).
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* These are the worker threads that performs actions placed on the work
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* lists.
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*
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* These entrypoints are referenced by OS internally and should not be
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* accessed by application logic.
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* work_hpthread and work_lpthread: These are the kernel mode work queues
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* (also build in the flat build). One of these threads also performs
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* periodic garbage collection (that is otherwise performed by the idle
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* thread if CONFIG_SCHED_WORKQUEUE is not defined).
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*
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* These worker threads are started by the OS during normal bringup.
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*
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* work_usrthread: This is a user mode work queue. It must be started
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* by application code by calling work_usrstart().
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*
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* All of these entrypoints are referenced by OS internally and should not
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* not be accessed by application logic.
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*
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* Input parameters:
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* argc, argv (not used)
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@@ -227,12 +365,37 @@ EXTERN struct wqueue_s g_work[NWORKERS];
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*
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****************************************************************************/
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#ifdef CONFIG_SCHED_HPWORK
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int work_hpthread(int argc, char *argv[]);
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#endif
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#ifdef CONFIG_SCHED_LPWORK
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int work_lpthread(int argc, char *argv[]);
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#endif
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#ifdef CONFIG_SCHED_USRWORK
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int work_usrthread(int argc, char *argv[]);
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#endif
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/****************************************************************************
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* Name: work_usrstart
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*
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* Description:
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* Start the user mode work queue.
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*
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* Input parameters:
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* None
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*
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* Returned Value:
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* The task ID of the worker thread is returned on success. A negated
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* errno value is returned on failure.
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*
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****************************************************************************/
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#ifdef CONFIG_SCHED_USRWORK
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int work_usrstart(void);
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#endif
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/****************************************************************************
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* Name: work_queue
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*
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@@ -324,4 +487,5 @@ int work_signal(int qid);
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* CONFIG_SCHED_WORKQUEUE */
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#endif /* __INCLUDE_NUTTX_WQUEUE_H */
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