1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief Translate sched_param into SuperCore Terms |
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5 | * @ingroup POSIX_PTHREAD Private POSIX Threads |
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6 | */ |
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7 | |
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8 | /* |
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9 | * COPYRIGHT (c) 1989-2009. |
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10 | * On-Line Applications Research Corporation (OAR). |
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11 | * |
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12 | * The license and distribution terms for this file may be |
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13 | * found in the file LICENSE in this distribution or at |
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14 | * http://www.rtems.com/license/LICENSE. |
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15 | */ |
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16 | |
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17 | #if HAVE_CONFIG_H |
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18 | #include "config.h" |
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19 | #endif |
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20 | |
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21 | #include <pthread.h> |
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22 | #include <errno.h> |
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23 | |
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24 | #include <rtems/system.h> |
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25 | #include <rtems/posix/pthreadimpl.h> |
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26 | #include <rtems/posix/priorityimpl.h> |
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27 | #include <rtems/posix/time.h> |
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28 | |
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29 | int _POSIX_Thread_Translate_sched_param( |
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30 | int policy, |
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31 | struct sched_param *param, |
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32 | Thread_CPU_budget_algorithms *budget_algorithm, |
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33 | Thread_CPU_budget_algorithm_callout *budget_callout |
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34 | ) |
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35 | { |
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36 | if ( !_POSIX_Priority_Is_valid( param->sched_priority ) ) |
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37 | return EINVAL; |
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38 | |
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39 | *budget_algorithm = THREAD_CPU_BUDGET_ALGORITHM_NONE; |
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40 | *budget_callout = NULL; |
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41 | |
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42 | if ( policy == SCHED_OTHER ) { |
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43 | *budget_algorithm = THREAD_CPU_BUDGET_ALGORITHM_RESET_TIMESLICE; |
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44 | return 0; |
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45 | } |
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46 | |
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47 | if ( policy == SCHED_FIFO ) { |
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48 | *budget_algorithm = THREAD_CPU_BUDGET_ALGORITHM_NONE; |
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49 | return 0; |
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50 | } |
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51 | |
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52 | if ( policy == SCHED_RR ) { |
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53 | *budget_algorithm = THREAD_CPU_BUDGET_ALGORITHM_EXHAUST_TIMESLICE; |
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54 | return 0; |
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55 | } |
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56 | |
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57 | if ( policy == SCHED_SPORADIC ) { |
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58 | if ( (param->sched_ss_repl_period.tv_sec == 0) && |
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59 | (param->sched_ss_repl_period.tv_nsec == 0) ) |
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60 | return EINVAL; |
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61 | |
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62 | if ( (param->sched_ss_init_budget.tv_sec == 0) && |
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63 | (param->sched_ss_init_budget.tv_nsec == 0) ) |
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64 | return EINVAL; |
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65 | |
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66 | if ( _Timespec_To_ticks( ¶m->sched_ss_repl_period ) < |
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67 | _Timespec_To_ticks( ¶m->sched_ss_init_budget ) ) |
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68 | return EINVAL; |
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69 | |
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70 | if ( !_POSIX_Priority_Is_valid( param->sched_ss_low_priority ) ) |
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71 | return EINVAL; |
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72 | |
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73 | *budget_algorithm = THREAD_CPU_BUDGET_ALGORITHM_CALLOUT; |
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74 | *budget_callout = _POSIX_Threads_Sporadic_budget_callout; |
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75 | return 0; |
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76 | } |
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77 | |
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78 | return EINVAL; |
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79 | } |
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