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126 lines
4.5 KiB
126 lines
4.5 KiB
/**************************************************************************** |
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* sched/pg_internal.h |
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* |
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* Copyright (C) 2010 Gregory Nutt. All rights reserved. |
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* Author: Gregory Nutt <gnutt@nuttx.org> |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* 3. Neither the name NuttX nor the names of its contributors may be |
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* used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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* |
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****************************************************************************/ |
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#ifndef __SCHED_PG_INTERNAL_H |
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#define __SCHED_PG_INTERNAL_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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#ifdef CONFIG_DISABLE_SIGNALS |
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# warning "Page fill support requires signals" |
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#endif |
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/**************************************************************************** |
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* Public Types |
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****************************************************************************/ |
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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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* os_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 progess. |
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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 _TCB *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_PG_INTERNAL_H */
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