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 RTEMSImplClassicRateMonotonic |
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7 | * |
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8 | * @brief This source file contains the implementation of |
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9 | * _Rate_monotonic_Timeout(). |
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10 | */ |
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11 | |
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12 | /* |
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13 | * COPYRIGHT (c) 1989-2009. |
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14 | * On-Line Applications Research Corporation (OAR). |
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15 | * |
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16 | * COPYRIGHT (c) 2016-2017 Kuan-Hsun Chen. |
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17 | * |
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18 | * Redistribution and use in source and binary forms, with or without |
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19 | * modification, are permitted provided that the following conditions |
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20 | * are met: |
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21 | * 1. Redistributions of source code must retain the above copyright |
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22 | * notice, this list of conditions and the following disclaimer. |
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23 | * 2. Redistributions in binary form must reproduce the above copyright |
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24 | * notice, this list of conditions and the following disclaimer in the |
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25 | * documentation and/or other materials provided with the distribution. |
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26 | * |
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27 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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28 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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29 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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30 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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31 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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32 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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33 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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34 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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35 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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36 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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37 | * POSSIBILITY OF SUCH DAMAGE. |
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38 | */ |
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39 | |
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40 | #ifdef HAVE_CONFIG_H |
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41 | #include "config.h" |
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42 | #endif |
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43 | |
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44 | #include <rtems/rtems/ratemonimpl.h> |
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45 | |
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46 | static void _Rate_monotonic_Renew_deadline( |
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47 | Rate_monotonic_Control *the_period, |
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48 | ISR_lock_Context *lock_context |
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49 | ) |
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50 | { |
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51 | uint64_t deadline; |
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52 | |
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53 | /* stay at 0xffffffff if postponed_jobs is going to overflow */ |
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54 | if ( the_period->postponed_jobs != UINT32_MAX ) { |
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55 | ++the_period->postponed_jobs; |
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56 | } |
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57 | |
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58 | the_period->state = RATE_MONOTONIC_EXPIRED; |
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59 | |
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60 | deadline = _Watchdog_Per_CPU_insert_ticks( |
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61 | &the_period->Timer, |
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62 | _Per_CPU_Get(), |
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63 | the_period->next_length |
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64 | ); |
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65 | the_period->latest_deadline = deadline; |
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66 | |
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67 | _Rate_monotonic_Release( the_period, lock_context ); |
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68 | } |
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69 | |
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70 | void _Rate_monotonic_Timeout( Watchdog_Control *the_watchdog ) |
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71 | { |
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72 | Rate_monotonic_Control *the_period; |
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73 | Thread_Control *owner; |
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74 | ISR_lock_Context lock_context; |
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75 | Thread_Wait_flags wait_flags; |
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76 | |
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77 | the_period = RTEMS_CONTAINER_OF( the_watchdog, Rate_monotonic_Control, Timer ); |
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78 | owner = the_period->owner; |
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79 | |
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80 | _ISR_lock_ISR_disable( &lock_context ); |
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81 | _Rate_monotonic_Acquire_critical( the_period, &lock_context ); |
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82 | wait_flags = _Thread_Wait_flags_get( owner ); |
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83 | |
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84 | if ( |
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85 | ( wait_flags & THREAD_WAIT_CLASS_PERIOD ) != 0 |
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86 | && owner->Wait.return_argument == the_period |
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87 | ) { |
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88 | bool unblock; |
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89 | bool success; |
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90 | |
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91 | owner->Wait.return_argument = NULL; |
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92 | |
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93 | success = _Thread_Wait_flags_try_change_release( |
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94 | owner, |
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95 | RATE_MONOTONIC_INTEND_TO_BLOCK, |
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96 | THREAD_WAIT_STATE_READY |
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97 | ); |
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98 | if ( success ) { |
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99 | unblock = false; |
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100 | } else { |
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101 | _Assert( _Thread_Wait_flags_get( owner ) == RATE_MONOTONIC_BLOCKED ); |
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102 | _Thread_Wait_flags_set( owner, THREAD_WAIT_STATE_READY ); |
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103 | unblock = true; |
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104 | } |
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105 | |
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106 | _Rate_monotonic_Restart( the_period, owner, &lock_context ); |
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107 | |
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108 | if ( unblock ) { |
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109 | _Thread_Unblock( owner ); |
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110 | } |
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111 | } else { |
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112 | _Rate_monotonic_Renew_deadline( the_period, &lock_context ); |
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113 | } |
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114 | } |
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