1 | /* SPDX-License-Identifier: BSD-2-Clause */ |
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2 | |
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3 | /** |
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4 | * @file |
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5 | * |
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6 | * @ingroup ClassicTasks |
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7 | * |
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8 | * @brief Implementation of rtems_scheduler_map_priority_to_posix(). |
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9 | */ |
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10 | |
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11 | /* |
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12 | * Copyright (C) 2020 embedded brains GmbH (http://www.embedded-brains.de) |
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13 | * |
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14 | * Redistribution and use in source and binary forms, with or without |
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15 | * modification, are permitted provided that the following conditions |
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16 | * are met: |
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17 | * 1. Redistributions of source code must retain the above copyright |
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18 | * notice, this list of conditions and the following disclaimer. |
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19 | * 2. Redistributions in binary form must reproduce the above copyright |
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20 | * notice, this list of conditions and the following disclaimer in the |
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21 | * documentation and/or other materials provided with the distribution. |
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22 | * |
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23 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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24 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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25 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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26 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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27 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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28 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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29 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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30 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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31 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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32 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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33 | * POSSIBILITY OF SUCH DAMAGE. |
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34 | */ |
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35 | |
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36 | #ifdef HAVE_CONFIG_H |
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37 | #include "config.h" |
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38 | #endif |
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39 | |
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40 | #include <rtems/rtems/tasks.h> |
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41 | #include <rtems/score/schedulerimpl.h> |
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42 | |
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43 | rtems_status_code rtems_scheduler_map_priority_to_posix( |
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44 | rtems_id scheduler_id, |
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45 | rtems_task_priority priority, |
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46 | int *posix_priority |
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47 | ) |
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48 | { |
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49 | const Scheduler_Control *scheduler; |
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50 | |
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51 | if ( posix_priority == NULL ) { |
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52 | return RTEMS_INVALID_ADDRESS; |
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53 | } |
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54 | |
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55 | scheduler = _Scheduler_Get_by_id( scheduler_id ); |
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56 | if ( scheduler == NULL ) { |
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57 | return RTEMS_INVALID_ID; |
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58 | } |
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59 | |
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60 | if ( priority < 1 ) { |
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61 | return RTEMS_INVALID_PRIORITY; |
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62 | } |
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63 | |
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64 | if ( priority >= scheduler->maximum_priority ) { |
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65 | return RTEMS_INVALID_PRIORITY; |
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66 | } |
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67 | |
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68 | *posix_priority = (int) ( scheduler->maximum_priority - priority ); |
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69 | return RTEMS_SUCCESSFUL; |
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70 | } |
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