1 | /** |
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2 | * @file |
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3 | * |
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4 | * This include file contains the static inline implementation of the private |
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5 | * inlined routines for POSIX condition variables. |
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6 | */ |
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7 | |
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8 | /* |
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9 | * COPYRIGHT (c) 1989-2013. |
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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.org/license/LICENSE. |
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15 | */ |
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16 | |
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17 | #ifndef _RTEMS_POSIX_CONDIMPL_H |
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18 | #define _RTEMS_POSIX_CONDIMPL_H |
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19 | |
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20 | #include <rtems/posix/cond.h> |
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21 | #include <rtems/score/objectimpl.h> |
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22 | #include <rtems/score/threadqimpl.h> |
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23 | |
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24 | #include <errno.h> |
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25 | |
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26 | #ifdef __cplusplus |
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27 | extern "C" { |
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28 | #endif |
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29 | |
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30 | /** |
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31 | * Constant to indicate condition variable does not currently have |
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32 | * a mutex assigned to it. |
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33 | */ |
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34 | #define POSIX_CONDITION_VARIABLES_NO_MUTEX 0 |
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35 | |
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36 | #define POSIX_CONDITION_VARIABLES_TQ_OPERATIONS &_Thread_queue_Operations_FIFO |
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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 | extern Objects_Information _POSIX_Condition_variables_Information; |
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43 | |
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44 | /** |
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45 | * The default condition variable attributes structure. |
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46 | */ |
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47 | extern const pthread_condattr_t _POSIX_Condition_variables_Default_attributes; |
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48 | |
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49 | RTEMS_INLINE_ROUTINE void _POSIX_Condition_variables_Initialize( |
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50 | POSIX_Condition_variables_Control *the_cond |
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51 | ) |
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52 | { |
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53 | _Thread_queue_Initialize( &the_cond->Wait_queue ); |
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54 | the_cond->mutex = POSIX_CONDITION_VARIABLES_NO_MUTEX; |
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55 | } |
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56 | |
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57 | RTEMS_INLINE_ROUTINE void _POSIX_Condition_variables_Destroy( |
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58 | POSIX_Condition_variables_Control *the_cond |
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59 | ) |
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60 | { |
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61 | _Thread_queue_Destroy( &the_cond->Wait_queue ); |
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62 | } |
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63 | |
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64 | RTEMS_INLINE_ROUTINE void _POSIX_Condition_variables_Acquire_critical( |
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65 | POSIX_Condition_variables_Control *the_cond, |
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66 | Thread_queue_Context *queue_context |
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67 | ) |
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68 | { |
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69 | _Thread_queue_Acquire_critical( |
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70 | &the_cond->Wait_queue, |
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71 | &queue_context->Lock_context |
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72 | ); |
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73 | } |
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74 | |
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75 | RTEMS_INLINE_ROUTINE void _POSIX_Condition_variables_Release( |
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76 | POSIX_Condition_variables_Control *the_cond, |
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77 | Thread_queue_Context *queue_context |
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78 | ) |
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79 | { |
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80 | _Thread_queue_Release( &the_cond->Wait_queue, &queue_context->Lock_context ); |
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81 | } |
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82 | |
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83 | /** |
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84 | * @brief POSIX Condition Variable Allocate |
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85 | * |
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86 | * This function allocates a condition variable control block from |
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87 | * the inactive chain of free condition variable control blocks. |
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88 | */ |
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89 | RTEMS_INLINE_ROUTINE POSIX_Condition_variables_Control * |
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90 | _POSIX_Condition_variables_Allocate( void ) |
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91 | { |
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92 | return (POSIX_Condition_variables_Control *) |
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93 | _Objects_Allocate( &_POSIX_Condition_variables_Information ); |
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94 | } |
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95 | |
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96 | /** |
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97 | * @brief POSIX Condition Variable Free |
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98 | * |
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99 | * This routine frees a condition variable control block to the |
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100 | * inactive chain of free condition variable control blocks. |
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101 | */ |
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102 | RTEMS_INLINE_ROUTINE void _POSIX_Condition_variables_Free ( |
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103 | POSIX_Condition_variables_Control *the_condition_variable |
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104 | ) |
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105 | { |
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106 | _Objects_Free( |
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107 | &_POSIX_Condition_variables_Information, |
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108 | &the_condition_variable->Object |
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109 | ); |
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110 | } |
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111 | |
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112 | POSIX_Condition_variables_Control *_POSIX_Condition_variables_Get( |
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113 | pthread_cond_t *cond, |
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114 | Thread_queue_Context *queue_context |
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115 | ); |
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116 | |
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117 | /** |
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118 | * @brief Implements wake up version of the "signal" operation. |
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119 | * |
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120 | * A support routine which implements guts of the broadcast and single task |
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121 | * wake up version of the "signal" operation. |
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122 | */ |
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123 | int _POSIX_Condition_variables_Signal_support( |
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124 | pthread_cond_t *cond, |
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125 | bool is_broadcast |
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126 | ); |
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127 | |
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128 | /** |
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129 | * @brief POSIX condition variables wait support. |
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130 | * |
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131 | * A support routine which implements guts of the blocking, non-blocking, and |
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132 | * timed wait version of condition variable wait routines. |
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133 | */ |
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134 | int _POSIX_Condition_variables_Wait_support( |
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135 | pthread_cond_t *cond, |
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136 | pthread_mutex_t *mutex, |
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137 | const struct timespec *abstime |
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138 | ); |
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139 | |
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140 | #ifdef __cplusplus |
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141 | } |
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142 | #endif |
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143 | |
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144 | #endif |
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145 | /* end of include file */ |
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