1 | /* rtems/posix/key.h |
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2 | * |
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3 | * This include file contains all the private support information for |
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4 | * POSIX key. |
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5 | * |
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6 | * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. |
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7 | * On-Line Applications Research Corporation (OAR). |
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8 | * All rights assigned to U.S. Government, 1994. |
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9 | * |
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10 | * This material may be reproduced by or for the U.S. Government pursuant |
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11 | * to the copyright license under the clause at DFARS 252.227-7013. This |
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12 | * notice must appear in all copies of this file and its derivatives. |
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13 | * |
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14 | * $Id$ |
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15 | */ |
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16 | |
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17 | #ifndef __RTEMS_POSIX_KEY_h |
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18 | #define __RTEMS_POSIX_KEY_h |
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19 | |
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20 | #ifdef __cplusplus |
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21 | extern "C" { |
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22 | #endif |
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23 | |
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24 | /* |
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25 | * Data Structure used to manage a POSIX key |
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26 | * |
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27 | * NOTE: The Values is a table indexed by the index portion of the |
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28 | * ID of the currently executing thread. |
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29 | */ |
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30 | |
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31 | typedef struct { |
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32 | Objects_Control Object; |
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33 | boolean is_active; |
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34 | void (*destructor)( void * ); |
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35 | void **Values[ OBJECTS_CLASSES_LAST_THREAD_CLASS + 1 ]; |
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36 | } POSIX_Keys_Control; |
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37 | |
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38 | /* |
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39 | * The following defines the information control block used to manage |
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40 | * this class of objects. |
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41 | */ |
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42 | |
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43 | EXTERN Objects_Information _POSIX_Keys_Information; |
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44 | |
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45 | /* |
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46 | * _POSIX_Keys_Manager_initialization |
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47 | * |
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48 | * DESCRIPTION: |
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49 | * |
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50 | * This routine performs the initialization necessary for this manager. |
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51 | */ |
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52 | |
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53 | void _POSIX_Key_Manager_initialization( |
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54 | unsigned32 maximum_keys |
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55 | ); |
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56 | |
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57 | /* |
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58 | * _POSIX_Keys_Run_destructors |
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59 | * |
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60 | * DESCRIPTION: |
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61 | * |
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62 | * This function executes all the destructors associated with the thread's |
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63 | * keys. This function will execute until all values have been set to NULL. |
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64 | * |
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65 | * NOTE: This is the routine executed when a thread exits to |
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66 | * run through all the keys and do the destructor action. |
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67 | */ |
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68 | |
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69 | void _POSIX_Keys_Run_destructors( |
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70 | Thread_Control *thread |
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71 | ); |
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72 | |
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73 | /* |
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74 | * _POSIX_Keys_Allocate |
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75 | * |
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76 | * DESCRIPTION: |
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77 | * |
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78 | * This function allocates a keys control block from |
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79 | * the inactive chain of free keys control blocks. |
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80 | */ |
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81 | |
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82 | STATIC INLINE POSIX_Keys_Control *_POSIX_Keys_Allocate( void ); |
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83 | |
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84 | /* |
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85 | * _POSIX_Keys_Free |
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86 | * |
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87 | * DESCRIPTION: |
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88 | * |
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89 | * This routine frees a keys control block to the |
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90 | * inactive chain of free keys control blocks. |
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91 | */ |
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92 | |
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93 | STATIC INLINE void _POSIX_Keys_Free ( |
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94 | POSIX_Keys_Control *the_key |
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95 | ); |
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96 | |
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97 | /* |
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98 | * _POSIX_Keys_Get |
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99 | * |
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100 | * DESCRIPTION: |
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101 | * |
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102 | * This function maps key IDs to key control blocks. |
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103 | * If ID corresponds to a local keys, then it returns |
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104 | * the_key control pointer which maps to ID and location |
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105 | * is set to OBJECTS_LOCAL. if the keys ID is global and |
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106 | * resides on a remote node, then location is set to OBJECTS_REMOTE, |
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107 | * and the_key is undefined. Otherwise, location is set |
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108 | * to OBJECTS_ERROR and the_key is undefined. |
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109 | */ |
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110 | |
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111 | STATIC INLINE POSIX_Keys_Control *_POSIX_Keys_Get ( |
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112 | Objects_Id id, |
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113 | Objects_Locations *location |
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114 | ); |
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115 | |
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116 | /* |
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117 | * _POSIX_Keys_Is_null |
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118 | * |
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119 | * DESCRIPTION: |
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120 | * |
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121 | * This function returns TRUE if the_key is NULL and FALSE otherwise. |
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122 | */ |
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123 | |
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124 | STATIC INLINE boolean _POSIX_Keys_Is_null ( |
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125 | POSIX_Keys_Control *the_key |
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126 | ); |
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127 | |
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128 | #include <rtems/posix/key.inl> |
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129 | |
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130 | #ifdef __cplusplus |
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131 | } |
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132 | #endif |
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133 | |
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134 | #endif |
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135 | /* end of include file */ |
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136 | |
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