1 | /** |
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2 | * @file rtems/rtems/asr.inl |
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3 | * |
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4 | * This include file contains the implemenation of all routines |
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5 | * associated with the asynchronous signal handler which are inlined. |
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6 | */ |
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7 | |
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8 | /* COPYRIGHT (c) 1989-2008. |
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9 | * On-Line Applications Research Corporation (OAR). |
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10 | * |
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11 | * The license and distribution terms for this file may be |
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12 | * found in the file LICENSE in this distribution or at |
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13 | * http://www.rtems.com/license/LICENSE. |
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14 | * |
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15 | * $Id$ |
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16 | */ |
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17 | |
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18 | #ifndef _RTEMS_RTEMS_ASR_H |
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19 | # error "Never use <rtems/rtems/asr.inl> directly; include <rtems/rtems/asr.h> instead." |
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20 | #endif |
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21 | |
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22 | #ifndef _RTEMS_RTEMS_ASR_INL |
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23 | #define _RTEMS_RTEMS_ASR_INL |
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24 | |
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25 | #include <rtems/score/isr.h> |
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26 | |
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27 | /** |
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28 | * @addtogroup ClassicASR |
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29 | * @{ |
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30 | */ |
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31 | |
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32 | /** |
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33 | * @brief ASR_Initialize |
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34 | * |
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35 | * This routine initializes the given RTEMS_ASR information record. |
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36 | */ |
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37 | RTEMS_INLINE_ROUTINE void _ASR_Initialize ( |
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38 | ASR_Information *information |
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39 | ) |
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40 | { |
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41 | information->is_enabled = TRUE; |
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42 | information->handler = NULL; |
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43 | information->mode_set = RTEMS_DEFAULT_MODES; |
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44 | information->signals_posted = 0; |
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45 | information->signals_pending = 0; |
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46 | information->nest_level = 0; |
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47 | } |
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48 | |
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49 | /** |
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50 | * @brief ASR_Swap_signals |
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51 | * |
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52 | * This routine atomically swaps the pending and posted signal |
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53 | * sets. This is done when the thread alters its mode in such a |
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54 | * way that the RTEMS_ASR disable/enable flag changes. |
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55 | */ |
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56 | RTEMS_INLINE_ROUTINE void _ASR_Swap_signals ( |
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57 | ASR_Information *information |
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58 | ) |
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59 | { |
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60 | rtems_signal_set _signals; |
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61 | ISR_Level _level; |
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62 | |
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63 | _ISR_Disable( _level ); |
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64 | _signals = information->signals_pending; |
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65 | information->signals_pending = information->signals_posted; |
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66 | information->signals_posted = _signals; |
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67 | _ISR_Enable( _level ); |
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68 | } |
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69 | |
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70 | /** |
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71 | * @brief ASR_Is_null_handler |
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72 | * |
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73 | * This function returns TRUE if the given asr_handler is NULL and |
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74 | * FALSE otherwise. |
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75 | */ |
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76 | RTEMS_INLINE_ROUTINE boolean _ASR_Is_null_handler ( |
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77 | rtems_asr_entry asr_handler |
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78 | ) |
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79 | { |
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80 | return asr_handler == NULL; |
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81 | } |
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82 | |
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83 | /** |
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84 | * @brief ASR_Are_signals_pending |
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85 | * |
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86 | * This function returns TRUE if there are signals pending in the |
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87 | * given RTEMS_ASR information record and FALSE otherwise. |
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88 | */ |
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89 | RTEMS_INLINE_ROUTINE boolean _ASR_Are_signals_pending ( |
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90 | ASR_Information *information |
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91 | ) |
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92 | { |
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93 | return information->signals_posted != 0; |
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94 | } |
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95 | |
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96 | /** |
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97 | * @brief ASR_Post_signals |
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98 | * |
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99 | * This routine posts the given signals into the signal_set |
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100 | * passed in. The result is returned to the user in signal_set. |
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101 | * |
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102 | * NOTE: This must be implemented as a macro. |
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103 | */ |
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104 | RTEMS_INLINE_ROUTINE void _ASR_Post_signals( |
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105 | rtems_signal_set signals, |
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106 | rtems_signal_set *signal_set |
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107 | ) |
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108 | { |
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109 | ISR_Level _level; |
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110 | |
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111 | _ISR_Disable( _level ); |
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112 | *signal_set |= signals; |
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113 | _ISR_Enable( _level ); |
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114 | } |
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115 | |
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116 | /**@}*/ |
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117 | |
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118 | #endif |
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119 | /* end of include file */ |
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