1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief Insert a Message into the Message Queue |
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5 | * @ingroup ScoreMessageQueue |
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6 | */ |
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7 | |
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8 | /* |
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9 | * COPYRIGHT (c) 1989-2005. |
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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 | #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/score/chain.h> |
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23 | #include <rtems/score/isr.h> |
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24 | #include <rtems/score/coremsgimpl.h> |
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25 | #include <rtems/score/thread.h> |
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26 | #include <rtems/score/wkspace.h> |
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27 | |
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28 | void _CORE_message_queue_Insert_message( |
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29 | CORE_message_queue_Control *the_message_queue, |
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30 | CORE_message_queue_Buffer_control *the_message, |
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31 | CORE_message_queue_Submit_types submit_type |
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32 | ) |
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33 | { |
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34 | ISR_Level level; |
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35 | #if defined(RTEMS_SCORE_COREMSG_ENABLE_NOTIFICATION) |
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36 | bool notify = false; |
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37 | #define SET_NOTIFY() \ |
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38 | do { \ |
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39 | if ( the_message_queue->number_of_pending_messages == 0 ) \ |
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40 | notify = true; \ |
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41 | } while (0) |
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42 | #else |
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43 | #define SET_NOTIFY() |
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44 | #endif |
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45 | |
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46 | _CORE_message_queue_Set_message_priority( the_message, submit_type ); |
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47 | |
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48 | #if !defined(RTEMS_SCORE_COREMSG_ENABLE_MESSAGE_PRIORITY) |
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49 | _ISR_Disable( level ); |
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50 | SET_NOTIFY(); |
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51 | the_message_queue->number_of_pending_messages++; |
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52 | if ( submit_type == CORE_MESSAGE_QUEUE_SEND_REQUEST ) |
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53 | _CORE_message_queue_Append_unprotected(the_message_queue, the_message); |
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54 | else |
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55 | _CORE_message_queue_Prepend_unprotected(the_message_queue, the_message); |
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56 | _ISR_Enable( level ); |
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57 | #else |
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58 | if ( submit_type == CORE_MESSAGE_QUEUE_SEND_REQUEST ) { |
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59 | _ISR_Disable( level ); |
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60 | SET_NOTIFY(); |
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61 | the_message_queue->number_of_pending_messages++; |
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62 | _CORE_message_queue_Append_unprotected(the_message_queue, the_message); |
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63 | _ISR_Enable( level ); |
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64 | } else if ( submit_type == CORE_MESSAGE_QUEUE_URGENT_REQUEST ) { |
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65 | _ISR_Disable( level ); |
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66 | SET_NOTIFY(); |
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67 | the_message_queue->number_of_pending_messages++; |
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68 | _CORE_message_queue_Prepend_unprotected(the_message_queue, the_message); |
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69 | _ISR_Enable( level ); |
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70 | } else { |
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71 | CORE_message_queue_Buffer_control *this_message; |
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72 | Chain_Node *the_node; |
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73 | Chain_Control *the_header; |
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74 | int the_priority; |
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75 | |
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76 | the_priority = _CORE_message_queue_Get_message_priority(the_message); |
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77 | the_header = &the_message_queue->Pending_messages; |
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78 | the_node = _Chain_First( the_header ); |
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79 | while ( !_Chain_Is_tail( the_header, the_node ) ) { |
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80 | int this_priority; |
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81 | |
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82 | this_message = (CORE_message_queue_Buffer_control *) the_node; |
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83 | |
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84 | this_priority = _CORE_message_queue_Get_message_priority(this_message); |
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85 | |
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86 | if ( this_priority <= the_priority ) { |
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87 | the_node = the_node->next; |
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88 | continue; |
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89 | } |
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90 | break; |
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91 | } |
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92 | _ISR_Disable( level ); |
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93 | SET_NOTIFY(); |
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94 | the_message_queue->number_of_pending_messages++; |
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95 | _Chain_Insert_unprotected( the_node->previous, &the_message->Node ); |
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96 | _ISR_Enable( level ); |
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97 | } |
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98 | #endif |
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99 | |
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100 | #if defined(RTEMS_SCORE_COREMSG_ENABLE_NOTIFICATION) |
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101 | /* |
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102 | * According to POSIX, does this happen before or after the message |
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103 | * is actually enqueued. It is logical to think afterwards, because |
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104 | * the message is actually in the queue at this point. |
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105 | */ |
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106 | if ( notify && the_message_queue->notify_handler ) |
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107 | (*the_message_queue->notify_handler)(the_message_queue->notify_argument); |
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108 | #endif |
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109 | } |
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