1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief Call to Function Enables Reinitializing of the Barrier |
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5 | * @ingroup POSIXAPI |
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6 | */ |
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7 | |
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8 | /* |
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9 | * POSIX Barrier Manager -- Initialize a Barrier Instance |
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10 | * |
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11 | * COPYRIGHT (c) 1989-2006. |
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12 | * On-Line Applications Research Corporation (OAR). |
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13 | * |
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14 | * Copyright (c) 2017 embedded brains GmbH |
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15 | * |
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16 | * The license and distribution terms for this file may be |
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17 | * found in the file LICENSE in this distribution or at |
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18 | * http://www.rtems.org/license/LICENSE. |
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19 | */ |
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20 | |
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21 | #if HAVE_CONFIG_H |
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22 | #include "config.h" |
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23 | #endif |
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24 | |
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25 | #include <rtems/posix/barrierimpl.h> |
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26 | #include <rtems/posix/posixapi.h> |
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27 | |
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28 | RTEMS_STATIC_ASSERT( |
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29 | offsetof( POSIX_Barrier_Control, flags ) |
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30 | == offsetof( pthread_barrier_t, _flags ), |
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31 | POSIX_BARRIER_CONTROL_FLAGS |
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32 | ); |
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33 | |
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34 | RTEMS_STATIC_ASSERT( |
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35 | offsetof( POSIX_Barrier_Control, count ) |
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36 | == offsetof( pthread_barrier_t, _count ), |
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37 | POSIX_BARRIER_CONTROL_COUNT |
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38 | ); |
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39 | |
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40 | RTEMS_STATIC_ASSERT( |
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41 | offsetof( POSIX_Barrier_Control, waiting_threads ) |
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42 | == offsetof( pthread_barrier_t, _waiting_threads ), |
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43 | POSIX_BARRIER_CONTROL_WAITING_THREADS |
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44 | ); |
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45 | |
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46 | RTEMS_STATIC_ASSERT( |
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47 | offsetof( POSIX_Barrier_Control, Queue ) |
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48 | == offsetof( pthread_barrier_t, _Queue ), |
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49 | POSIX_BARRIER_CONTROL_QUEUE |
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50 | ); |
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51 | |
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52 | RTEMS_STATIC_ASSERT( |
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53 | sizeof( POSIX_Barrier_Control ) == sizeof( pthread_barrier_t ), |
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54 | POSIX_BARRIER_CONTROL_SIZE |
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55 | ); |
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56 | |
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57 | int pthread_barrier_init( |
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58 | pthread_barrier_t *_barrier, |
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59 | const pthread_barrierattr_t *attr, |
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60 | unsigned int count |
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61 | ) |
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62 | { |
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63 | POSIX_Barrier_Control *barrier; |
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64 | |
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65 | barrier = _POSIX_Barrier_Get( _barrier ); |
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66 | |
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67 | /* |
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68 | * Error check parameters |
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69 | */ |
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70 | if ( barrier == NULL ) { |
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71 | return EINVAL; |
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72 | } |
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73 | |
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74 | if ( count == 0 ) { |
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75 | return EINVAL; |
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76 | } |
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77 | |
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78 | if ( attr != NULL ) { |
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79 | /* |
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80 | * Now start error checking the attributes that we are going to use |
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81 | */ |
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82 | if ( !attr->is_initialized ) |
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83 | return EINVAL; |
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84 | |
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85 | if ( !_POSIX_Is_valid_pshared( attr->process_shared ) ) { |
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86 | return EINVAL; |
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87 | } |
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88 | } |
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89 | |
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90 | barrier->flags = (uintptr_t) barrier ^ POSIX_BARRIER_MAGIC; |
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91 | barrier->count = count; |
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92 | barrier->waiting_threads = 0; |
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93 | _Thread_queue_Queue_initialize( &barrier->Queue.Queue, NULL ); |
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94 | return 0; |
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95 | } |
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