1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief RTEMS Delete Semaphore |
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5 | * @ingroup ClassicSem |
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6 | */ |
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7 | |
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8 | /* |
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9 | * COPYRIGHT (c) 1989-2007. |
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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 <rtems/system.h> |
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22 | #include <rtems/rtems/status.h> |
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23 | #include <rtems/rtems/support.h> |
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24 | #include <rtems/rtems/attrimpl.h> |
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25 | #include <rtems/score/isr.h> |
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26 | #include <rtems/rtems/options.h> |
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27 | #include <rtems/rtems/semimpl.h> |
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28 | #include <rtems/score/coremuteximpl.h> |
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29 | #include <rtems/score/coresemimpl.h> |
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30 | #include <rtems/score/thread.h> |
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31 | |
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32 | #include <rtems/score/interr.h> |
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33 | |
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34 | #if defined(RTEMS_MULTIPROCESSING) |
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35 | #define SEMAPHORE_MP_OBJECT_WAS_DELETED _Semaphore_MP_Send_object_was_deleted |
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36 | #else |
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37 | #define SEMAPHORE_MP_OBJECT_WAS_DELETED NULL |
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38 | #endif |
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39 | |
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40 | rtems_status_code rtems_semaphore_delete( |
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41 | rtems_id id |
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42 | ) |
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43 | { |
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44 | register Semaphore_Control *the_semaphore; |
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45 | Objects_Locations location; |
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46 | |
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47 | the_semaphore = _Semaphore_Get( id, &location ); |
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48 | switch ( location ) { |
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49 | |
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50 | case OBJECTS_LOCAL: |
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51 | if ( !_Attributes_Is_counting_semaphore(the_semaphore->attribute_set) ) { |
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52 | if ( _CORE_mutex_Is_locked( &the_semaphore->Core_control.mutex ) && |
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53 | !_Attributes_Is_simple_binary_semaphore( |
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54 | the_semaphore->attribute_set ) ) { |
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55 | _Objects_Put( &the_semaphore->Object ); |
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56 | return RTEMS_RESOURCE_IN_USE; |
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57 | } |
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58 | _CORE_mutex_Flush( |
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59 | &the_semaphore->Core_control.mutex, |
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60 | SEMAPHORE_MP_OBJECT_WAS_DELETED, |
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61 | CORE_MUTEX_WAS_DELETED |
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62 | ); |
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63 | } else { |
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64 | _CORE_semaphore_Flush( |
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65 | &the_semaphore->Core_control.semaphore, |
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66 | SEMAPHORE_MP_OBJECT_WAS_DELETED, |
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67 | CORE_SEMAPHORE_WAS_DELETED |
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68 | ); |
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69 | } |
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70 | |
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71 | _Objects_Close( &_Semaphore_Information, &the_semaphore->Object ); |
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72 | |
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73 | _Semaphore_Free( the_semaphore ); |
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74 | |
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75 | #if defined(RTEMS_MULTIPROCESSING) |
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76 | if ( _Attributes_Is_global( the_semaphore->attribute_set ) ) { |
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77 | |
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78 | _Objects_MP_Close( &_Semaphore_Information, the_semaphore->Object.id ); |
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79 | |
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80 | _Semaphore_MP_Send_process_packet( |
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81 | SEMAPHORE_MP_ANNOUNCE_DELETE, |
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82 | the_semaphore->Object.id, |
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83 | 0, /* Not used */ |
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84 | 0 /* Not used */ |
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85 | ); |
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86 | } |
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87 | #endif |
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88 | _Objects_Put( &the_semaphore->Object ); |
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89 | return RTEMS_SUCCESSFUL; |
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90 | |
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91 | #if defined(RTEMS_MULTIPROCESSING) |
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92 | case OBJECTS_REMOTE: |
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93 | _Thread_Dispatch(); |
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94 | return RTEMS_ILLEGAL_ON_REMOTE_OBJECT; |
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95 | #endif |
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96 | |
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97 | case OBJECTS_ERROR: |
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98 | break; |
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99 | } |
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100 | |
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101 | return RTEMS_INVALID_ID; |
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102 | } |
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