1 | /* |
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2 | * Semaphore Manager |
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3 | * |
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4 | * DESCRIPTION: |
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5 | * |
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6 | * This package is the implementation of the Semaphore Manager. |
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7 | * This manager utilizes standard Dijkstra counting semaphores to provide |
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8 | * synchronization and mutual exclusion capabilities. |
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9 | * |
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10 | * Directives provided are: |
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11 | * |
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12 | * + create a semaphore |
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13 | * + get an ID of a semaphore |
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14 | * + delete a semaphore |
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15 | * + acquire a semaphore |
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16 | * + release a semaphore |
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17 | * |
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18 | * COPYRIGHT (c) 1989-1999. |
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19 | * On-Line Applications Research Corporation (OAR). |
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20 | * |
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21 | * The license and distribution terms for this file may be |
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22 | * found in the file LICENSE in this distribution or at |
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23 | * http://www.OARcorp.com/rtems/license.html. |
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24 | * |
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25 | * $Id$ |
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26 | */ |
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27 | |
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28 | #include <rtems/system.h> |
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29 | #include <rtems/rtems/status.h> |
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30 | #include <rtems/rtems/support.h> |
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31 | #include <rtems/rtems/attr.h> |
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32 | #include <rtems/score/isr.h> |
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33 | #include <rtems/score/object.h> |
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34 | #include <rtems/rtems/options.h> |
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35 | #include <rtems/rtems/sem.h> |
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36 | #include <rtems/score/coremutex.h> |
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37 | #include <rtems/score/coresem.h> |
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38 | #include <rtems/score/states.h> |
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39 | #include <rtems/score/thread.h> |
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40 | #include <rtems/score/threadq.h> |
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41 | #if defined(RTEMS_MULTIPROCESSING) |
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42 | #include <rtems/score/mpci.h> |
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43 | #endif |
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44 | #include <rtems/score/sysstate.h> |
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45 | |
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46 | #include <rtems/score/interr.h> |
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47 | |
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48 | /*PAGE |
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49 | * |
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50 | * _Semaphore_Translate_core_mutex_return_code |
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51 | * |
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52 | * Input parameters: |
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53 | * the_mutex_status - mutex status code to translate |
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54 | * |
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55 | * Output parameters: |
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56 | * rtems status code - translated RTEMS status code |
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57 | * |
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58 | */ |
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59 | |
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60 | rtems_status_code _Semaphore_Translate_core_mutex_return_code ( |
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61 | unsigned32 the_mutex_status |
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62 | ) |
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63 | { |
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64 | switch ( the_mutex_status ) { |
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65 | case CORE_MUTEX_STATUS_SUCCESSFUL: |
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66 | return RTEMS_SUCCESSFUL; |
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67 | case CORE_MUTEX_STATUS_UNSATISFIED_NOWAIT: |
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68 | return RTEMS_UNSATISFIED; |
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69 | case CORE_MUTEX_STATUS_NESTING_NOT_ALLOWED: |
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70 | return RTEMS_UNSATISFIED; |
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71 | case CORE_MUTEX_STATUS_NOT_OWNER_OF_RESOURCE: |
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72 | return RTEMS_NOT_OWNER_OF_RESOURCE; |
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73 | case CORE_MUTEX_WAS_DELETED: |
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74 | return RTEMS_OBJECT_WAS_DELETED; |
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75 | case CORE_MUTEX_TIMEOUT: |
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76 | return RTEMS_TIMEOUT; |
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77 | case THREAD_STATUS_PROXY_BLOCKING: |
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78 | return RTEMS_PROXY_BLOCKING; |
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79 | } |
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80 | return RTEMS_INTERNAL_ERROR; /* unreached - only to remove warnings */ |
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81 | } |
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82 | |
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83 | /*PAGE |
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84 | * |
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85 | * _Semaphore_Translate_core_semaphore_return_code |
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86 | * |
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87 | * Input parameters: |
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88 | * the_semaphore_status - semaphore status code to translate |
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89 | * |
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90 | * Output parameters: |
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91 | * rtems status code - translated RTEMS status code |
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92 | * |
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93 | */ |
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94 | |
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95 | rtems_status_code _Semaphore_Translate_core_semaphore_return_code ( |
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96 | unsigned32 the_semaphore_status |
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97 | ) |
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98 | { |
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99 | switch ( the_semaphore_status ) { |
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100 | case CORE_SEMAPHORE_STATUS_SUCCESSFUL: |
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101 | return RTEMS_SUCCESSFUL; |
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102 | case CORE_SEMAPHORE_STATUS_UNSATISFIED_NOWAIT: |
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103 | return RTEMS_UNSATISFIED; |
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104 | case CORE_SEMAPHORE_WAS_DELETED: |
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105 | return RTEMS_OBJECT_WAS_DELETED; |
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106 | case CORE_SEMAPHORE_TIMEOUT: |
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107 | return RTEMS_TIMEOUT; |
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108 | |
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109 | /* |
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110 | * An overflow should not occur in the Classic API. |
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111 | */ |
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112 | |
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113 | case CORE_SEMAPHORE_MAXIMUM_COUNT_EXCEEDED: |
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114 | return RTEMS_INTERNAL_ERROR; |
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115 | |
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116 | case THREAD_STATUS_PROXY_BLOCKING: |
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117 | return RTEMS_PROXY_BLOCKING; |
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118 | } |
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119 | return RTEMS_INTERNAL_ERROR; /* unreached - only to remove warnings */ |
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120 | } |
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