104 lines
3.5 KiB
C
104 lines
3.5 KiB
C
/****************************************************************************
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* sched/paging/paging.h
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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#ifndef __SCHED_PAGING_PAGING_H
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#define __SCHED_PAGING_PAGING_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <queue.h>
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#ifdef CONFIG_PAGING
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Configuration ************************************************************/
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/* Supply reasonable (but probably non-optimal) default settings if
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* configuration items are omitted.
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*/
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#ifndef CONFIG_PAGING_DEFPRIO
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# define CONFIG_PAGING_DEFPRIO 50
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#endif
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#ifndef CONFIG_PAGING_WORKPERIOD
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# define CONFIG_PAGING_WORKPERIOD (500*1000) /* 1/2 second */
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#endif
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#ifndef CONFIG_PAGING_STACKSIZE
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# define CONFIG_PAGING_STACKSIZE CONFIG_IDLETHREAD_STACKSIZE
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#endif
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/****************************************************************************
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* Public Data
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****************************************************************************/
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#ifndef __ASSEMBLY
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/* This is the task IDof the page fill worker thread. This value was set in
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* nx_start when the page fill worker thread was started.
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*/
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extern pid_t g_pgworker;
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/* The page fill worker thread maintains a static variable called g_pftcb.
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* If no page fill is in progress, g_pftcb will be NULL. Otherwise, g_pftcb
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* will point to the TCB of the task which is receiving the fill that is
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* in progress.
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*
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* NOTE: I think that this is the only state in which a TCB does not reside
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* in some list. Here is it in limbo, outside of the normally queuing while
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* the page file is in progress. Where here, it will be marked with
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* TSTATE_TASK_INVALID.
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*/
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extern FAR struct tcb_s *g_pftcb;
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Name: pg_worker
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*
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* Description:
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* This is the entry point of the worker thread that performs the actual
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* page file.
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*
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* Input Parameters:
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* argc, argv (not used)
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*
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* Returned Value:
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* Does not return
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*
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****************************************************************************/
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int pg_worker(int argc, char *argv[]);
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#endif /* __ASSEMBLY__ */
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#endif /* CONFIG_PAGING */
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#endif /* __SCHED_PAGING_PAGING_H */
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