[7f72217e] | 1 | /* |
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[5e9b32b] | 2 | * NOTE: The structure of the routines is identical to that of POSIX |
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| 3 | * Message_queues to leave the option of having unnamed message |
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| 4 | * queues at a future date. They are currently not part of the |
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| 5 | * POSIX standard but unnamed message_queues are. This is also |
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| 6 | * the reason for the apparently unnecessary tracking of |
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| 7 | * the process_shared attribute. [In addition to the fact that |
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| 8 | * it would be trivial to add pshared to the mq_attr structure |
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| 9 | * and have process private message queues.] |
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| 10 | * |
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| 11 | * This code ignores the O_RDONLY/O_WRONLY/O_RDWR flag at open |
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| 12 | * time. |
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[eb5a7e07] | 13 | * |
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| 14 | * $Id$ |
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[5e9b32b] | 15 | */ |
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| 16 | |
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| 17 | #include <stdarg.h> |
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| 18 | |
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| 19 | #include <pthread.h> |
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| 20 | #include <limits.h> |
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| 21 | #include <errno.h> |
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| 22 | #include <fcntl.h> |
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| 23 | #include <mqueue.h> |
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[f4719d5a] | 24 | |
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[5e9b32b] | 25 | #include <rtems/system.h> |
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| 26 | #include <rtems/score/watchdog.h> |
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[05ce4e09] | 27 | #include <rtems/posix/seterr.h> |
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[5e9b32b] | 28 | #include <rtems/posix/mqueue.h> |
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| 29 | #include <rtems/posix/time.h> |
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| 30 | |
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| 31 | /*PAGE |
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| 32 | * |
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| 33 | * _POSIX_Message_queue_Manager_initialization |
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| 34 | * |
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| 35 | * This routine initializes all message_queue manager related data structures. |
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| 36 | * |
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| 37 | * Input parameters: |
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| 38 | * maximum_message_queues - maximum configured message_queues |
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| 39 | * |
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| 40 | * Output parameters: NONE |
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| 41 | */ |
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| 42 | |
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| 43 | void _POSIX_Message_queue_Manager_initialization( |
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| 44 | unsigned32 maximum_message_queues |
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| 45 | ) |
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| 46 | { |
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| 47 | _Objects_Initialize_information( |
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| 48 | &_POSIX_Message_queue_Information, |
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| 49 | OBJECTS_POSIX_MESSAGE_QUEUES, |
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| 50 | TRUE, |
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| 51 | maximum_message_queues, |
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| 52 | sizeof( POSIX_Message_queue_Control ), |
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| 53 | TRUE, |
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| 54 | _POSIX_PATH_MAX, |
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| 55 | FALSE |
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| 56 | ); |
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| 57 | } |
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| 58 | |
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| 59 | /*PAGE |
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| 60 | * |
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| 61 | * _POSIX_Message_queue_Create_support |
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| 62 | */ |
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| 63 | |
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| 64 | int _POSIX_Message_queue_Create_support( |
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| 65 | const char *name, |
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| 66 | int pshared, |
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| 67 | unsigned int oflag, |
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| 68 | struct mq_attr *attr, |
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| 69 | POSIX_Message_queue_Control **message_queue |
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| 70 | ) |
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| 71 | { |
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| 72 | POSIX_Message_queue_Control *the_mq; |
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| 73 | |
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| 74 | _Thread_Disable_dispatch(); |
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| 75 | |
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| 76 | the_mq = _POSIX_Message_queue_Allocate(); |
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| 77 | |
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| 78 | if ( !the_mq ) { |
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| 79 | _Thread_Enable_dispatch(); |
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[05ce4e09] | 80 | set_errno_and_return_minus_one( ENFILE ); |
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[5e9b32b] | 81 | } |
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| 82 | |
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| 83 | if ( pshared == PTHREAD_PROCESS_SHARED && |
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| 84 | !( _Objects_MP_Allocate_and_open( &_POSIX_Message_queue_Information, 0, |
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| 85 | the_mq->Object.id, FALSE ) ) ) { |
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| 86 | _POSIX_Message_queue_Free( the_mq ); |
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| 87 | _Thread_Enable_dispatch(); |
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[05ce4e09] | 88 | set_errno_and_return_minus_one( ENFILE ); |
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[5e9b32b] | 89 | } |
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| 90 | |
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| 91 | the_mq->process_shared = pshared; |
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| 92 | |
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| 93 | if ( name ) { |
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| 94 | the_mq->named = TRUE; |
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| 95 | the_mq->open_count = 1; |
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| 96 | the_mq->linked = TRUE; |
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| 97 | } |
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| 98 | else |
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| 99 | the_mq->named = FALSE; |
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| 100 | |
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| 101 | if ( oflag & O_NONBLOCK ) |
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| 102 | the_mq->blocking = FALSE; |
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| 103 | else |
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| 104 | the_mq->blocking = TRUE; |
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| 105 | |
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| 106 | /* XXX |
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| 107 | * |
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| 108 | * Note that this should be based on the current scheduling policy. |
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| 109 | */ |
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| 110 | |
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| 111 | /* XXX |
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| 112 | * |
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| 113 | * Message and waiting disciplines are not distinguished. |
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| 114 | */ |
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| 115 | /* |
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| 116 | the_mq_attr->message_discipline = CORE_MESSAGE_QUEUE_DISCIPLINES_FIFO; |
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| 117 | the_mq_attr->waiting_discipline = CORE_MESSAGE_QUEUE_DISCIPLINES_FIFO; |
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| 118 | */ |
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| 119 | |
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| 120 | the_mq->Message_queue.Attributes.discipline = |
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| 121 | CORE_MESSAGE_QUEUE_DISCIPLINES_FIFO; |
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| 122 | |
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| 123 | if ( ! _CORE_message_queue_Initialize( |
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| 124 | &the_mq->Message_queue, |
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| 125 | OBJECTS_POSIX_MESSAGE_QUEUES, |
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| 126 | &the_mq->Message_queue.Attributes, |
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| 127 | attr->mq_maxmsg, |
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| 128 | attr->mq_msgsize, |
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| 129 | _POSIX_Message_queue_MP_Send_extract_proxy ) ) { |
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| 130 | |
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| 131 | if ( pshared == PTHREAD_PROCESS_SHARED ) |
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| 132 | _Objects_MP_Close( &_POSIX_Message_queue_Information, the_mq->Object.id ); |
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| 133 | |
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| 134 | _POSIX_Message_queue_Free( the_mq ); |
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| 135 | _Thread_Enable_dispatch(); |
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[05ce4e09] | 136 | set_errno_and_return_minus_one( ENOSPC ); |
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[5e9b32b] | 137 | } |
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| 138 | |
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| 139 | |
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| 140 | /* XXX - need Names to be a string!!! */ |
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| 141 | _Objects_Open( |
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| 142 | &_POSIX_Message_queue_Information, |
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| 143 | &the_mq->Object, |
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| 144 | (char *) name |
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| 145 | ); |
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| 146 | |
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| 147 | *message_queue = the_mq; |
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| 148 | |
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| 149 | if ( pshared == PTHREAD_PROCESS_SHARED ) |
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| 150 | _POSIX_Message_queue_MP_Send_process_packet( |
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| 151 | POSIX_MESSAGE_QUEUE_MP_ANNOUNCE_CREATE, |
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| 152 | the_mq->Object.id, |
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| 153 | (char *) name, |
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| 154 | 0 /* Not used */ |
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| 155 | ); |
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| 156 | |
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| 157 | _Thread_Enable_dispatch(); |
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| 158 | return 0; |
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| 159 | } |
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| 160 | |
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| 161 | /*PAGE |
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| 162 | * |
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| 163 | * 15.2.2 Open a Message Queue, P1003.1b-1993, p. 272 |
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| 164 | */ |
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| 165 | |
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| 166 | mqd_t mq_open( |
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| 167 | const char *name, |
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| 168 | int oflag, |
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| 169 | ... |
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| 170 | /* mode_t mode, */ |
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| 171 | /* struct mq_attr attr */ |
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| 172 | ) |
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| 173 | { |
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| 174 | va_list arg; |
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| 175 | mode_t mode; |
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| 176 | struct mq_attr *attr; |
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| 177 | int status; |
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| 178 | Objects_Id the_mq_id; |
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| 179 | POSIX_Message_queue_Control *the_mq; |
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| 180 | |
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| 181 | if ( oflag & O_CREAT ) { |
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| 182 | va_start(arg, oflag); |
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| 183 | mode = (mode_t) va_arg( arg, mode_t * ); |
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| 184 | attr = (struct mq_attr *) va_arg( arg, struct mq_attr ** ); |
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| 185 | va_end(arg); |
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| 186 | } |
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| 187 | |
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| 188 | status = _POSIX_Message_queue_Name_to_id( name, &the_mq_id ); |
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| 189 | |
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| 190 | /* |
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| 191 | * If the name to id translation worked, then the message queue exists |
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| 192 | * and we can just return a pointer to the id. Otherwise we may |
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| 193 | * need to check to see if this is a "message queue does not exist" |
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| 194 | * or some other miscellaneous error on the name. |
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| 195 | */ |
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| 196 | |
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| 197 | if ( status ) { |
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| 198 | |
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| 199 | if ( status == EINVAL ) { /* name -> ID translation failed */ |
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| 200 | if ( !(oflag & O_CREAT) ) { /* willing to create it? */ |
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| 201 | seterrno( ENOENT ); |
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| 202 | return (mqd_t) -1; |
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| 203 | } |
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| 204 | /* we are willing to create it */ |
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| 205 | } |
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| 206 | seterrno( status ); /* some type of error */ |
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| 207 | return (mqd_t) -1; |
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| 208 | |
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| 209 | } else { /* name -> ID translation succeeded */ |
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| 210 | |
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| 211 | if ( (oflag & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL) ) { |
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| 212 | seterrno( EEXIST ); |
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| 213 | return (mqd_t) -1; |
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| 214 | } |
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| 215 | |
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| 216 | /* |
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| 217 | * XXX In this case we need to do an ID->pointer conversion to |
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| 218 | * check the mode. This is probably a good place for a subroutine. |
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| 219 | */ |
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| 220 | |
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| 221 | the_mq->open_count += 1; |
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| 222 | |
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| 223 | return (mqd_t)&the_mq->Object.id; |
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| 224 | |
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| 225 | } |
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| 226 | |
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| 227 | /* XXX verify this comment... |
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| 228 | * |
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| 229 | * At this point, the message queue does not exist and everything has been |
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| 230 | * checked. We should go ahead and create a message queue. |
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| 231 | */ |
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| 232 | |
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| 233 | status = _POSIX_Message_queue_Create_support( |
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| 234 | name, |
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| 235 | TRUE, /* shared across processes */ |
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| 236 | oflag, |
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| 237 | attr, |
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| 238 | &the_mq |
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| 239 | ); |
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| 240 | |
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| 241 | if ( status == -1 ) |
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| 242 | return (mqd_t) -1; |
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| 243 | |
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| 244 | return (mqd_t) &the_mq->Object.id; |
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| 245 | } |
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| 246 | |
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| 247 | /*PAGE |
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| 248 | * |
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| 249 | * _POSIX_Message_queue_Delete |
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| 250 | */ |
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| 251 | |
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| 252 | void _POSIX_Message_queue_Delete( |
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| 253 | POSIX_Message_queue_Control *the_mq |
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| 254 | ) |
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| 255 | { |
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| 256 | if ( !the_mq->linked && !the_mq->open_count ) { |
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| 257 | _POSIX_Message_queue_Free( the_mq ); |
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| 258 | |
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| 259 | if ( the_mq->process_shared == PTHREAD_PROCESS_SHARED ) { |
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| 260 | |
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| 261 | _Objects_MP_Close( |
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| 262 | &_POSIX_Message_queue_Information, |
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| 263 | the_mq->Object.id |
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| 264 | ); |
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| 265 | |
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| 266 | _POSIX_Message_queue_MP_Send_process_packet( |
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| 267 | POSIX_MESSAGE_QUEUE_MP_ANNOUNCE_DELETE, |
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| 268 | the_mq->Object.id, |
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| 269 | 0, /* Not used */ |
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| 270 | 0 /* Not used */ |
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| 271 | ); |
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| 272 | } |
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| 273 | |
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| 274 | } |
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| 275 | } |
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| 276 | |
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| 277 | /*PAGE |
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| 278 | * |
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| 279 | * 15.2.2 Close a Message Queue, P1003.1b-1993, p. 275 |
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| 280 | */ |
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| 281 | |
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| 282 | int mq_close( |
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| 283 | mqd_t mqdes |
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| 284 | ) |
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| 285 | { |
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| 286 | register POSIX_Message_queue_Control *the_mq; |
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| 287 | Objects_Locations location; |
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| 288 | |
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| 289 | the_mq = _POSIX_Message_queue_Get( mqdes, &location ); |
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| 290 | switch ( location ) { |
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| 291 | case OBJECTS_ERROR: |
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| 292 | seterrno( EINVAL ); |
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| 293 | return( -1 ); |
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| 294 | case OBJECTS_REMOTE: |
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| 295 | _Thread_Dispatch(); |
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| 296 | return POSIX_MP_NOT_IMPLEMENTED(); |
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| 297 | seterrno( EINVAL ); |
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| 298 | return( -1 ); |
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| 299 | case OBJECTS_LOCAL: |
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| 300 | the_mq->open_count -= 1; |
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| 301 | _POSIX_Message_queue_Delete( the_mq ); |
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| 302 | _Thread_Enable_dispatch(); |
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| 303 | return 0; |
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| 304 | } |
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| 305 | return POSIX_BOTTOM_REACHED(); |
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| 306 | } |
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| 307 | |
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| 308 | /*PAGE |
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| 309 | * |
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| 310 | * 15.2.2 Remove a Message Queue, P1003.1b-1993, p. 276 |
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| 311 | */ |
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| 312 | |
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| 313 | int mq_unlink( |
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| 314 | const char *name |
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| 315 | ) |
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| 316 | { |
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| 317 | int status; |
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| 318 | register POSIX_Message_queue_Control *the_mq; |
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| 319 | Objects_Id the_mq_id; |
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| 320 | Objects_Locations location; |
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| 321 | |
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| 322 | status = _POSIX_Message_queue_Name_to_id( name, &the_mq_id ); |
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| 323 | |
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[05ce4e09] | 324 | if ( !status ) |
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| 325 | set_errno_and_return_minus_one( status ); |
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[5e9b32b] | 326 | |
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| 327 | the_mq = _POSIX_Message_queue_Get( the_mq_id, &location ); |
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| 328 | switch ( location ) { |
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| 329 | case OBJECTS_ERROR: |
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| 330 | seterrno( EINVAL ); |
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| 331 | return( -1 ); |
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| 332 | case OBJECTS_REMOTE: |
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| 333 | _Thread_Dispatch(); |
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| 334 | return POSIX_MP_NOT_IMPLEMENTED(); |
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| 335 | seterrno( EINVAL ); |
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| 336 | return( -1 ); |
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| 337 | case OBJECTS_LOCAL: |
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| 338 | |
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| 339 | _Objects_MP_Close( |
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| 340 | &_POSIX_Message_queue_Information, |
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| 341 | the_mq->Object.id |
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| 342 | ); |
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| 343 | |
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| 344 | the_mq->linked = FALSE; |
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| 345 | |
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| 346 | _POSIX_Message_queue_Delete( the_mq ); |
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| 347 | |
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| 348 | _Thread_Enable_dispatch(); |
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| 349 | return 0; |
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| 350 | } |
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| 351 | return POSIX_BOTTOM_REACHED(); |
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| 352 | } |
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| 353 | |
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| 354 | /*PAGE |
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| 355 | * |
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| 356 | * _POSIX_Message_queue_Send_support |
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| 357 | */ |
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| 358 | |
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| 359 | int _POSIX_Message_queue_Send_support( |
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| 360 | mqd_t mqdes, |
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| 361 | const char *msg_ptr, |
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| 362 | unsigned32 msg_len, |
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| 363 | Priority_Control msg_prio, |
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| 364 | Watchdog_Interval timeout |
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| 365 | ) |
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| 366 | { |
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| 367 | register POSIX_Message_queue_Control *the_mq; |
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| 368 | Objects_Locations location; |
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| 369 | |
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| 370 | the_mq = _POSIX_Message_queue_Get( mqdes, &location ); |
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| 371 | switch ( location ) { |
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| 372 | case OBJECTS_ERROR: |
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| 373 | seterrno( EINVAL ); |
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| 374 | return( -1 ); |
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| 375 | case OBJECTS_REMOTE: |
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| 376 | _Thread_Dispatch(); |
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| 377 | return POSIX_MP_NOT_IMPLEMENTED(); |
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| 378 | seterrno( EINVAL ); |
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| 379 | return( -1 ); |
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| 380 | case OBJECTS_LOCAL: |
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| 381 | /* XXX must add support for timeout and priority */ |
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| 382 | _CORE_message_queue_Send( |
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| 383 | &the_mq->Message_queue, |
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| 384 | (void *) msg_ptr, |
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| 385 | msg_len, |
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| 386 | mqdes, |
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| 387 | NULL /* XXX _POSIX_Message_queue_Core_message_queue_mp_support*/ |
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| 388 | ); |
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| 389 | _Thread_Enable_dispatch(); |
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| 390 | return _Thread_Executing->Wait.return_code; |
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| 391 | } |
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| 392 | return POSIX_BOTTOM_REACHED(); |
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| 393 | } |
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| 394 | |
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| 395 | /*PAGE |
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| 396 | * |
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| 397 | * 15.2.4 Send a Message to a Message Queue, P1003.1b-1993, p. 277 |
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| 398 | * |
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| 399 | * NOTE: P1003.4b/D8, p. 45 adds mq_timedsend(). |
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| 400 | */ |
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| 401 | |
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| 402 | int mq_send( |
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| 403 | mqd_t mqdes, |
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| 404 | const char *msg_ptr, |
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| 405 | size_t msg_len, |
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| 406 | unsigned int msg_prio |
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| 407 | ) |
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| 408 | { |
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| 409 | return _POSIX_Message_queue_Send_support( |
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| 410 | mqdes, |
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| 411 | msg_ptr, |
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| 412 | msg_len, |
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| 413 | msg_prio, |
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| 414 | THREAD_QUEUE_WAIT_FOREVER |
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| 415 | ); |
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| 416 | } |
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| 417 | |
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| 418 | /*PAGE |
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| 419 | * |
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| 420 | * 15.2.4 Send a Message to a Message Queue, P1003.1b-1993, p. 277 |
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| 421 | * |
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| 422 | * NOTE: P1003.4b/D8, p. 45 adds mq_timedsend(). |
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| 423 | */ |
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| 424 | |
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| 425 | int mq_timedsend( |
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| 426 | mqd_t mqdes, |
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| 427 | const char *msg_ptr, |
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| 428 | size_t msg_len, |
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| 429 | unsigned int msg_prio, |
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| 430 | const struct timespec *timeout |
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| 431 | ) |
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| 432 | { |
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| 433 | return _POSIX_Message_queue_Send_support( |
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| 434 | mqdes, |
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| 435 | msg_ptr, |
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| 436 | msg_len, |
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| 437 | msg_prio, |
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[5b748a1] | 438 | _POSIX_Timespec_to_interval( timeout ) |
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[5e9b32b] | 439 | ); |
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| 440 | } |
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| 441 | |
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| 442 | /*PAGE |
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| 443 | * |
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| 444 | * _POSIX_Message_queue_Receive_support |
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| 445 | */ |
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| 446 | |
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| 447 | /* XXX be careful ... watch the size going through all the layers ... */ |
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| 448 | |
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| 449 | ssize_t _POSIX_Message_queue_Receive_support( |
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| 450 | mqd_t mqdes, |
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| 451 | char *msg_ptr, |
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| 452 | size_t msg_len, |
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| 453 | unsigned int *msg_prio, |
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| 454 | Watchdog_Interval timeout |
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| 455 | ) |
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| 456 | { |
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| 457 | register POSIX_Message_queue_Control *the_mq; |
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| 458 | Objects_Locations location; |
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| 459 | unsigned32 status = 0; |
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| 460 | unsigned32 length_out; |
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| 461 | |
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| 462 | the_mq = _POSIX_Message_queue_Get( mqdes, &location ); |
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| 463 | switch ( location ) { |
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| 464 | case OBJECTS_ERROR: |
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| 465 | seterrno( EINVAL ); |
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| 466 | return( -1 ); |
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| 467 | case OBJECTS_REMOTE: |
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| 468 | _Thread_Dispatch(); |
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| 469 | return POSIX_MP_NOT_IMPLEMENTED(); |
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| 470 | seterrno( EINVAL ); |
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| 471 | return( -1 ); |
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| 472 | case OBJECTS_LOCAL: |
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| 473 | /* XXX need to define the options argument to this */ |
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| 474 | length_out = msg_len; |
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| 475 | _CORE_message_queue_Seize( |
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| 476 | &the_mq->Message_queue, |
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| 477 | mqdes, |
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| 478 | msg_ptr, |
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| 479 | &length_out, |
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| 480 | /* msg_prio, XXXX */ |
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| 481 | the_mq->blocking, |
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| 482 | timeout |
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| 483 | ); |
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| 484 | _Thread_Enable_dispatch(); |
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| 485 | if ( !status ) |
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| 486 | return length_out; |
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| 487 | /* XXX --- the return codes gotta be looked at .. fix this */ |
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| 488 | return _Thread_Executing->Wait.return_code; |
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| 489 | } |
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| 490 | return POSIX_BOTTOM_REACHED(); |
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| 491 | } |
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| 492 | |
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| 493 | /*PAGE |
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| 494 | * |
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| 495 | * 15.2.5 Receive a Message From a Message Queue, P1003.1b-1993, p. 279 |
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| 496 | * |
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| 497 | * NOTE: P1003.4b/D8, p. 45 adds mq_timedreceive(). |
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| 498 | */ |
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| 499 | |
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| 500 | ssize_t mq_receive( |
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| 501 | mqd_t mqdes, |
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| 502 | char *msg_ptr, |
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| 503 | size_t msg_len, |
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| 504 | unsigned int *msg_prio |
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| 505 | ) |
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| 506 | { |
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| 507 | return _POSIX_Message_queue_Receive_support( |
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| 508 | mqdes, |
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| 509 | msg_ptr, |
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| 510 | msg_len, |
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| 511 | msg_prio, |
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| 512 | THREAD_QUEUE_WAIT_FOREVER |
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| 513 | ); |
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| 514 | } |
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| 515 | |
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| 516 | /*PAGE |
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| 517 | * |
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| 518 | * 15.2.5 Receive a Message From a Message Queue, P1003.1b-1993, p. 279 |
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| 519 | * |
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| 520 | * NOTE: P1003.4b/D8, p. 45 adds mq_timedreceive(). |
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| 521 | */ |
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| 522 | |
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| 523 | int mq_timedreceive( /* XXX: should this be ssize_t */ |
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| 524 | mqd_t mqdes, |
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| 525 | char *msg_ptr, |
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| 526 | size_t msg_len, |
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| 527 | unsigned int *msg_prio, |
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| 528 | const struct timespec *timeout |
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| 529 | ) |
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| 530 | { |
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| 531 | return _POSIX_Message_queue_Receive_support( |
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| 532 | mqdes, |
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| 533 | msg_ptr, |
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| 534 | msg_len, |
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| 535 | msg_prio, |
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[5b748a1] | 536 | _POSIX_Timespec_to_interval( timeout ) |
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[5e9b32b] | 537 | ); |
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| 538 | } |
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| 539 | |
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| 540 | /*PAGE |
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| 541 | * |
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| 542 | * _POSIX_Message_queue_Notify_handler |
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| 543 | * |
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| 544 | */ |
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| 545 | |
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| 546 | void _POSIX_Message_queue_Notify_handler( |
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| 547 | void *user_data |
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| 548 | ) |
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| 549 | { |
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| 550 | POSIX_Message_queue_Control *the_mq; |
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| 551 | |
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| 552 | the_mq = user_data; |
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| 553 | |
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| 554 | /* XXX do something with signals here!!!! */ |
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| 555 | } |
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| 556 | |
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| 557 | /*PAGE |
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| 558 | * |
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| 559 | * 15.2.6 Notify Process that a Message is Available on a Queue, |
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| 560 | * P1003.1b-1993, p. 280 |
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| 561 | */ |
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| 562 | |
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| 563 | int mq_notify( |
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| 564 | mqd_t mqdes, |
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| 565 | const struct sigevent *notification |
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| 566 | ) |
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| 567 | { |
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| 568 | register POSIX_Message_queue_Control *the_mq; |
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| 569 | Objects_Locations location; |
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| 570 | |
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| 571 | the_mq = _POSIX_Message_queue_Get( mqdes, &location ); |
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| 572 | switch ( location ) { |
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| 573 | case OBJECTS_ERROR: |
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| 574 | seterrno( EBADF ); |
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| 575 | return( -1 ); |
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| 576 | case OBJECTS_REMOTE: |
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| 577 | _Thread_Dispatch(); |
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| 578 | return POSIX_MP_NOT_IMPLEMENTED(); |
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| 579 | seterrno( EINVAL ); |
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| 580 | return( -1 ); |
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| 581 | case OBJECTS_LOCAL: |
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| 582 | if ( notification ) { |
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| 583 | if ( _CORE_message_queue_Is_notify_enabled( &the_mq->Message_queue ) ) { |
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| 584 | _Thread_Enable_dispatch(); |
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| 585 | seterrno( EBUSY ); |
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| 586 | return( -1 ); |
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| 587 | } |
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| 588 | |
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| 589 | _CORE_message_queue_Set_notify( &the_mq->Message_queue, NULL, NULL ); |
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| 590 | |
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| 591 | the_mq->notification = *notification; |
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| 592 | |
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| 593 | _CORE_message_queue_Set_notify( |
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| 594 | &the_mq->Message_queue, |
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| 595 | _POSIX_Message_queue_Notify_handler, |
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| 596 | the_mq |
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| 597 | ); |
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| 598 | } else { |
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| 599 | |
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| 600 | _CORE_message_queue_Set_notify( &the_mq->Message_queue, NULL, NULL ); |
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| 601 | |
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| 602 | } |
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| 603 | |
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| 604 | _Thread_Enable_dispatch(); |
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| 605 | return 0; |
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| 606 | } |
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| 607 | return POSIX_BOTTOM_REACHED(); |
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| 608 | } |
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| 609 | |
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| 610 | /*PAGE |
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| 611 | * |
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| 612 | * 15.2.7 Set Message Queue Attributes, P1003.1b-1993, p. 281 |
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| 613 | */ |
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| 614 | |
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| 615 | int mq_setattr( |
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| 616 | mqd_t mqdes, |
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| 617 | const struct mq_attr *mqstat, |
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| 618 | struct mq_attr *omqstat |
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| 619 | ) |
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| 620 | { |
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| 621 | register POSIX_Message_queue_Control *the_mq; |
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| 622 | Objects_Locations location; |
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| 623 | CORE_message_queue_Attributes *the_mq_attr; |
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| 624 | |
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| 625 | the_mq = _POSIX_Message_queue_Get( mqdes, &location ); |
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| 626 | switch ( location ) { |
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| 627 | case OBJECTS_ERROR: |
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| 628 | seterrno( EINVAL ); |
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| 629 | return( -1 ); |
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| 630 | case OBJECTS_REMOTE: |
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| 631 | _Thread_Dispatch(); |
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| 632 | return POSIX_MP_NOT_IMPLEMENTED(); |
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| 633 | seterrno( EINVAL ); |
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| 634 | return( -1 ); |
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| 635 | case OBJECTS_LOCAL: |
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| 636 | /* |
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| 637 | * Return the old values. |
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| 638 | */ |
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| 639 | |
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| 640 | /* XXX this is the same stuff as is in mq_getattr... and probably */ |
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| 641 | /* XXX should be in an inlined private routine */ |
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| 642 | |
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| 643 | the_mq_attr = &the_mq->Message_queue.Attributes; |
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| 644 | |
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| 645 | omqstat->mq_flags = the_mq->flags; |
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| 646 | omqstat->mq_msgsize = the_mq->Message_queue.maximum_message_size; |
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| 647 | omqstat->mq_maxmsg = the_mq->Message_queue.maximum_pending_messages; |
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| 648 | omqstat->mq_curmsgs = the_mq->Message_queue.number_of_pending_messages; |
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| 649 | |
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| 650 | /* |
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| 651 | * Ignore everything except the O_NONBLOCK bit. |
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| 652 | */ |
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| 653 | |
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| 654 | if ( mqstat->mq_flags & O_NONBLOCK ) |
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| 655 | the_mq->blocking = FALSE; |
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| 656 | else |
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| 657 | the_mq->blocking = TRUE; |
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| 658 | |
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| 659 | the_mq->flags = mqstat->mq_flags; |
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| 660 | |
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| 661 | _Thread_Enable_dispatch(); |
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| 662 | return 0; |
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| 663 | } |
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| 664 | return POSIX_BOTTOM_REACHED(); |
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| 665 | } |
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| 666 | |
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| 667 | /*PAGE |
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| 668 | * |
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| 669 | * 15.2.8 Get Message Queue Attributes, P1003.1b-1993, p. 283 |
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| 670 | */ |
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| 671 | |
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| 672 | int mq_getattr( |
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| 673 | mqd_t mqdes, |
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| 674 | struct mq_attr *mqstat |
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| 675 | ) |
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| 676 | { |
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| 677 | register POSIX_Message_queue_Control *the_mq; |
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| 678 | Objects_Locations location; |
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| 679 | CORE_message_queue_Attributes *the_mq_attr; |
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| 680 | |
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| 681 | the_mq = _POSIX_Message_queue_Get( mqdes, &location ); |
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| 682 | switch ( location ) { |
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| 683 | case OBJECTS_ERROR: |
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| 684 | seterrno( EINVAL ); |
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| 685 | return( -1 ); |
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| 686 | case OBJECTS_REMOTE: |
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| 687 | _Thread_Dispatch(); |
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| 688 | return POSIX_MP_NOT_IMPLEMENTED(); |
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| 689 | seterrno( EINVAL ); |
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| 690 | return( -1 ); |
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| 691 | case OBJECTS_LOCAL: |
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| 692 | /* |
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| 693 | * Return the old values. |
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| 694 | */ |
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| 695 | |
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| 696 | /* XXX this is the same stuff as is in mq_setattr... and probably */ |
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| 697 | /* XXX should be in an inlined private routine */ |
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| 698 | |
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| 699 | the_mq_attr = &the_mq->Message_queue.Attributes; |
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| 700 | |
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| 701 | mqstat->mq_flags = the_mq->flags; |
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| 702 | mqstat->mq_msgsize = the_mq->Message_queue.maximum_message_size; |
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| 703 | mqstat->mq_maxmsg = the_mq->Message_queue.maximum_pending_messages; |
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| 704 | mqstat->mq_curmsgs = the_mq->Message_queue.number_of_pending_messages; |
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| 705 | |
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| 706 | _Thread_Enable_dispatch(); |
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| 707 | return 0; |
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| 708 | } |
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| 709 | return POSIX_BOTTOM_REACHED(); |
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| 710 | } |
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