[52adc808] | 1 | /** |
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| 2 | * @file |
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[5f9b3db] | 3 | * |
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[52adc808] | 4 | * @brief Rate Monotonic Timeout |
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| 5 | * @ingroup ClassicRateMon |
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| 6 | */ |
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| 7 | |
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| 8 | /* |
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[94d9bee] | 9 | * COPYRIGHT (c) 1989-2009. |
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[5f9b3db] | 10 | * On-Line Applications Research Corporation (OAR). |
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| 11 | * |
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[3a46b72] | 12 | * COPYRIGHT (c) 2016 Kuan-Hsun Chen. |
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| 13 | * |
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[5f9b3db] | 14 | * The license and distribution terms for this file may be |
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| 15 | * found in the file LICENSE in this distribution or at |
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[c499856] | 16 | * http://www.rtems.org/license/LICENSE. |
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[5f9b3db] | 17 | */ |
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| 18 | |
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[1095ec1] | 19 | #if HAVE_CONFIG_H |
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| 20 | #include "config.h" |
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| 21 | #endif |
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| 22 | |
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[ecdcf01] | 23 | #include <rtems/rtems/ratemonimpl.h> |
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[5f9b3db] | 24 | |
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[1240aade] | 25 | static void _Rate_monotonic_Renew_deadline( |
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| 26 | Rate_monotonic_Control *the_period, |
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| 27 | Thread_Control *owner, |
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| 28 | ISR_lock_Context *lock_context |
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| 29 | ) |
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| 30 | { |
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| 31 | uint64_t deadline; |
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| 32 | |
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| 33 | ++the_period->postponed_jobs; |
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| 34 | the_period->state = RATE_MONOTONIC_EXPIRED; |
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| 35 | |
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| 36 | deadline = _Watchdog_Per_CPU_insert_relative( |
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| 37 | &the_period->Timer, |
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| 38 | _Per_CPU_Get(), |
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| 39 | the_period->next_length |
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| 40 | ); |
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| 41 | the_period->latest_deadline = deadline; |
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| 42 | |
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| 43 | _Rate_monotonic_Release( the_period, lock_context ); |
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| 44 | } |
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| 45 | |
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[90960bd] | 46 | void _Rate_monotonic_Timeout( Watchdog_Control *the_watchdog ) |
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[5f9b3db] | 47 | { |
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| 48 | Rate_monotonic_Control *the_period; |
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[90960bd] | 49 | Thread_Control *owner; |
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| 50 | ISR_lock_Context lock_context; |
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| 51 | Thread_Wait_flags wait_flags; |
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| 52 | |
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| 53 | the_period = RTEMS_CONTAINER_OF( the_watchdog, Rate_monotonic_Control, Timer ); |
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| 54 | owner = the_period->owner; |
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| 55 | |
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| 56 | _ISR_lock_ISR_disable( &lock_context ); |
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[ee0e4135] | 57 | _Rate_monotonic_Acquire_critical( the_period, &lock_context ); |
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[90960bd] | 58 | wait_flags = _Thread_Wait_flags_get( owner ); |
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| 59 | |
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| 60 | if ( |
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| 61 | ( wait_flags & THREAD_WAIT_CLASS_PERIOD ) != 0 |
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| 62 | && owner->Wait.return_argument == the_period |
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| 63 | ) { |
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| 64 | bool unblock; |
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| 65 | bool success; |
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| 66 | |
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| 67 | owner->Wait.return_argument = NULL; |
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| 68 | |
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[02987728] | 69 | success = _Thread_Wait_flags_try_change_release( |
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[90960bd] | 70 | owner, |
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| 71 | RATE_MONOTONIC_INTEND_TO_BLOCK, |
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| 72 | RATE_MONOTONIC_READY_AGAIN |
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| 73 | ); |
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| 74 | if ( success ) { |
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| 75 | unblock = false; |
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| 76 | } else { |
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| 77 | _Assert( _Thread_Wait_flags_get( owner ) == RATE_MONOTONIC_BLOCKED ); |
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| 78 | _Thread_Wait_flags_set( owner, RATE_MONOTONIC_READY_AGAIN ); |
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| 79 | unblock = true; |
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| 80 | } |
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| 81 | |
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| 82 | _Rate_monotonic_Restart( the_period, owner, &lock_context ); |
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| 83 | |
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| 84 | if ( unblock ) { |
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| 85 | _Thread_Unblock( owner ); |
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| 86 | } |
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[03b900d] | 87 | } else { |
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[3a46b72] | 88 | _Rate_monotonic_Renew_deadline( the_period, owner, &lock_context ); |
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[5f9b3db] | 89 | } |
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| 90 | } |
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