[5e9b32b] | 1 | /* mqueue.h |
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| 2 | * |
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| 3 | */ |
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| 4 | |
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| 5 | #ifndef __POSIX_MESSAGE_QUEUE_h |
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| 6 | #define __POSIX_MESSAGE_QUEUE_h |
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| 7 | |
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| 8 | #include <rtems/posix/features.h> |
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| 9 | |
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| 10 | #if defined(_POSIX_MESSAGE_PASSING) |
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| 11 | |
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| 12 | #include <sys/types.h> |
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| 13 | |
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| 14 | #include <rtems/system.h> |
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| 15 | #include <rtems/score/object.h> |
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| 16 | |
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| 17 | /* |
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| 18 | * 15.1.1 Data Structures, P1003.1b-1993, p. 271 |
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| 19 | */ |
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| 20 | |
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| 21 | typedef Objects_Id mqd_t; |
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| 22 | |
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| 23 | struct mq_attr { |
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| 24 | long mq_flags; /* Message queue flags */ |
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| 25 | long mq_maxmsg; /* Maximum number of messages */ |
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| 26 | long mq_msgsize; /* Maximum message size */ |
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| 27 | long mq_curmsgs; /* Number of messages currently queued */ |
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| 28 | }; |
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| 29 | |
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| 30 | /* |
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| 31 | * 15.2.2 Open a Message Queue, P1003.1b-1993, p. 272 |
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| 32 | */ |
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| 33 | |
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| 34 | mqd_t mq_open( |
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| 35 | const char *name, |
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| 36 | int oflag, |
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| 37 | ... |
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| 38 | ); |
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| 39 | |
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| 40 | /* |
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| 41 | * 15.2.2 Close a Message Queue, P1003.1b-1993, p. 275 |
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| 42 | */ |
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| 43 | |
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| 44 | int mq_close( |
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| 45 | mqd_t mqdes |
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| 46 | ); |
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| 47 | |
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| 48 | /* |
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| 49 | * 15.2.2 Remove a Message Queue, P1003.1b-1993, p. 276 |
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| 50 | */ |
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| 51 | |
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| 52 | int mq_unlink( |
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| 53 | const char *name |
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| 54 | ); |
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| 55 | |
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| 56 | /* |
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| 57 | * 15.2.4 Send a Message to a Message Queue, P1003.1b-1993, p. 277 |
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| 58 | * |
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| 59 | * NOTE: P1003.4b/D8, p. 45 adds mq_timedsend(). |
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| 60 | */ |
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| 61 | |
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| 62 | int mq_send( |
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| 63 | mqd_t mqdes, |
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| 64 | const char *msg_ptr, |
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| 65 | size_t msg_len, |
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| 66 | unsigned int msg_prio |
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| 67 | ); |
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| 68 | |
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| 69 | #if defined(_POSIX_TIMEOUTS) |
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| 70 | |
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| 71 | #include <time.h> |
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| 72 | |
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| 73 | int mq_timedsend( |
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| 74 | mqd_t mqdes, |
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| 75 | const char *msg_ptr, |
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| 76 | size_t msg_len, |
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| 77 | unsigned int msg_prio, |
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| 78 | const struct timespec *timeout |
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| 79 | ); |
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| 80 | |
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| 81 | #endif /* _POSIX_TIMEOUTS */ |
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| 82 | |
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| 83 | /* |
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| 84 | * 15.2.5 Receive a Message From a Message Queue, P1003.1b-1993, p. 279 |
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| 85 | * |
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| 86 | * NOTE: P1003.4b/D8, p. 45 adds mq_timedreceive(). |
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| 87 | */ |
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| 88 | |
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| 89 | ssize_t mq_receive( |
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| 90 | mqd_t mqdes, |
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| 91 | char *msg_ptr, |
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| 92 | size_t msg_len, |
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| 93 | unsigned int *msg_prio |
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| 94 | ); |
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| 95 | |
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| 96 | #if defined(_POSIX_TIMEOUTS) |
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| 97 | |
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| 98 | int mq_timedreceive( /* XXX: should this be ssize_t */ |
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| 99 | mqd_t mqdes, |
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| 100 | char *msg_ptr, |
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| 101 | size_t msg_len, |
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| 102 | unsigned int *msg_prio, |
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| 103 | const struct timespec *timeout |
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| 104 | ); |
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| 105 | |
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| 106 | #endif /* _POSIX_TIMEOUTS */ |
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| 107 | |
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| 108 | #if defined(_POSIX_REALTIME_SIGNALS) |
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| 109 | |
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| 110 | /* |
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| 111 | * 15.2.6 Notify Process that a Message is Available on a Queue, |
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| 112 | * P1003.1b-1993, p. 280 |
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| 113 | */ |
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| 114 | |
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| 115 | int mq_notify( |
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| 116 | mqd_t mqdes, |
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| 117 | const struct sigevent *notification |
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| 118 | ); |
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| 119 | |
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| 120 | #endif /* _POSIX_REALTIME_SIGNALS */ |
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| 121 | |
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| 122 | /* |
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| 123 | * 15.2.7 Set Message Queue Attributes, P1003.1b-1993, p. 281 |
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| 124 | */ |
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| 125 | |
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| 126 | int mq_setattr( |
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| 127 | mqd_t mqdes, |
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| 128 | const struct mq_attr *mqstat, |
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| 129 | struct mq_attr *omqstat |
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| 130 | ); |
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| 131 | |
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| 132 | /* |
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| 133 | * 15.2.8 Get Message Queue Attributes, P1003.1b-1993, p. 283 |
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| 134 | */ |
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| 135 | |
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| 136 | int mq_getattr( |
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| 137 | mqd_t mqdes, |
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| 138 | struct mq_attr *mqstat |
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| 139 | ); |
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| 140 | |
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| 141 | #endif /* _POSIX_MESSAGE_PASSING */ |
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| 142 | |
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| 143 | #endif |
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| 144 | /* end of include file */ |
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