[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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[93994fdb] | 83 | #if defined(RTEMS_MULTIPROCESSING) |
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[5e9b32b] | 84 | if ( pshared == PTHREAD_PROCESS_SHARED && |
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| 85 | !( _Objects_MP_Allocate_and_open( &_POSIX_Message_queue_Information, 0, |
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| 86 | the_mq->Object.id, FALSE ) ) ) { |
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| 87 | _POSIX_Message_queue_Free( the_mq ); |
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| 88 | _Thread_Enable_dispatch(); |
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[05ce4e09] | 89 | set_errno_and_return_minus_one( ENFILE ); |
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[5e9b32b] | 90 | } |
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[93994fdb] | 91 | #endif |
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[5e9b32b] | 92 | |
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| 93 | the_mq->process_shared = pshared; |
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| 94 | |
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| 95 | if ( name ) { |
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| 96 | the_mq->named = TRUE; |
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| 97 | the_mq->open_count = 1; |
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| 98 | the_mq->linked = TRUE; |
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| 99 | } |
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| 100 | else |
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| 101 | the_mq->named = FALSE; |
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| 102 | |
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| 103 | if ( oflag & O_NONBLOCK ) |
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| 104 | the_mq->blocking = FALSE; |
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| 105 | else |
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| 106 | the_mq->blocking = TRUE; |
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| 107 | |
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| 108 | /* XXX |
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| 109 | * |
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| 110 | * Note that this should be based on the current scheduling policy. |
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| 111 | */ |
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| 112 | |
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| 113 | /* XXX |
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| 114 | * |
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| 115 | * Message and waiting disciplines are not distinguished. |
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| 116 | */ |
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| 117 | /* |
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| 118 | the_mq_attr->message_discipline = CORE_MESSAGE_QUEUE_DISCIPLINES_FIFO; |
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| 119 | the_mq_attr->waiting_discipline = CORE_MESSAGE_QUEUE_DISCIPLINES_FIFO; |
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| 120 | */ |
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| 121 | |
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| 122 | the_mq->Message_queue.Attributes.discipline = |
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| 123 | CORE_MESSAGE_QUEUE_DISCIPLINES_FIFO; |
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| 124 | |
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| 125 | if ( ! _CORE_message_queue_Initialize( |
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| 126 | &the_mq->Message_queue, |
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| 127 | OBJECTS_POSIX_MESSAGE_QUEUES, |
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| 128 | &the_mq->Message_queue.Attributes, |
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| 129 | attr->mq_maxmsg, |
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| 130 | attr->mq_msgsize, |
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[93994fdb] | 131 | #if defined(RTEMS_MULTIPROCESSING) |
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| 132 | _POSIX_Message_queue_MP_Send_extract_proxy |
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| 133 | #else |
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| 134 | NULL |
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| 135 | #endif |
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| 136 | ) ) { |
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| 137 | |
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| 138 | #if defined(RTEMS_MULTIPROCESSING) |
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[5e9b32b] | 139 | if ( pshared == PTHREAD_PROCESS_SHARED ) |
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| 140 | _Objects_MP_Close( &_POSIX_Message_queue_Information, the_mq->Object.id ); |
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[93994fdb] | 141 | #endif |
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[5e9b32b] | 142 | |
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| 143 | _POSIX_Message_queue_Free( the_mq ); |
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| 144 | _Thread_Enable_dispatch(); |
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[05ce4e09] | 145 | set_errno_and_return_minus_one( ENOSPC ); |
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[5e9b32b] | 146 | } |
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| 147 | |
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| 148 | |
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| 149 | /* XXX - need Names to be a string!!! */ |
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| 150 | _Objects_Open( |
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| 151 | &_POSIX_Message_queue_Information, |
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| 152 | &the_mq->Object, |
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| 153 | (char *) name |
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| 154 | ); |
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| 155 | |
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| 156 | *message_queue = the_mq; |
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| 157 | |
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[93994fdb] | 158 | #if defined(RTEMS_MULTIPROCESSING) |
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[5e9b32b] | 159 | if ( pshared == PTHREAD_PROCESS_SHARED ) |
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| 160 | _POSIX_Message_queue_MP_Send_process_packet( |
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| 161 | POSIX_MESSAGE_QUEUE_MP_ANNOUNCE_CREATE, |
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| 162 | the_mq->Object.id, |
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| 163 | (char *) name, |
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| 164 | 0 /* Not used */ |
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| 165 | ); |
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[93994fdb] | 166 | #endif |
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[5e9b32b] | 167 | |
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| 168 | _Thread_Enable_dispatch(); |
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| 169 | return 0; |
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| 170 | } |
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| 171 | |
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| 172 | /*PAGE |
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| 173 | * |
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| 174 | * 15.2.2 Open a Message Queue, P1003.1b-1993, p. 272 |
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| 175 | */ |
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| 176 | |
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| 177 | mqd_t mq_open( |
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| 178 | const char *name, |
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| 179 | int oflag, |
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| 180 | ... |
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| 181 | /* mode_t mode, */ |
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| 182 | /* struct mq_attr attr */ |
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| 183 | ) |
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| 184 | { |
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| 185 | va_list arg; |
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| 186 | mode_t mode; |
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| 187 | struct mq_attr *attr; |
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| 188 | int status; |
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| 189 | Objects_Id the_mq_id; |
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| 190 | POSIX_Message_queue_Control *the_mq; |
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| 191 | |
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| 192 | if ( oflag & O_CREAT ) { |
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| 193 | va_start(arg, oflag); |
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| 194 | mode = (mode_t) va_arg( arg, mode_t * ); |
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| 195 | attr = (struct mq_attr *) va_arg( arg, struct mq_attr ** ); |
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| 196 | va_end(arg); |
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| 197 | } |
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| 198 | |
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| 199 | status = _POSIX_Message_queue_Name_to_id( name, &the_mq_id ); |
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| 200 | |
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| 201 | /* |
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| 202 | * If the name to id translation worked, then the message queue exists |
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| 203 | * and we can just return a pointer to the id. Otherwise we may |
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| 204 | * need to check to see if this is a "message queue does not exist" |
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| 205 | * or some other miscellaneous error on the name. |
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| 206 | */ |
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| 207 | |
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| 208 | if ( status ) { |
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| 209 | |
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| 210 | if ( status == EINVAL ) { /* name -> ID translation failed */ |
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| 211 | if ( !(oflag & O_CREAT) ) { /* willing to create it? */ |
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[93994fdb] | 212 | set_errno_and_return_minus_one( ENOENT ); |
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[5e9b32b] | 213 | return (mqd_t) -1; |
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| 214 | } |
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| 215 | /* we are willing to create it */ |
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| 216 | } |
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[93994fdb] | 217 | set_errno_and_return_minus_one( status ); /* some type of error */ |
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[5e9b32b] | 218 | return (mqd_t) -1; |
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| 219 | |
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| 220 | } else { /* name -> ID translation succeeded */ |
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| 221 | |
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| 222 | if ( (oflag & (O_CREAT | O_EXCL)) == (O_CREAT | O_EXCL) ) { |
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[93994fdb] | 223 | set_errno_and_return_minus_one( EEXIST ); |
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[5e9b32b] | 224 | return (mqd_t) -1; |
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| 225 | } |
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| 226 | |
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| 227 | /* |
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| 228 | * XXX In this case we need to do an ID->pointer conversion to |
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| 229 | * check the mode. This is probably a good place for a subroutine. |
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| 230 | */ |
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| 231 | |
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| 232 | the_mq->open_count += 1; |
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| 233 | |
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| 234 | return (mqd_t)&the_mq->Object.id; |
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| 235 | |
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| 236 | } |
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| 237 | |
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| 238 | /* XXX verify this comment... |
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| 239 | * |
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| 240 | * At this point, the message queue does not exist and everything has been |
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| 241 | * checked. We should go ahead and create a message queue. |
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| 242 | */ |
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| 243 | |
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| 244 | status = _POSIX_Message_queue_Create_support( |
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| 245 | name, |
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| 246 | TRUE, /* shared across processes */ |
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| 247 | oflag, |
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| 248 | attr, |
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| 249 | &the_mq |
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| 250 | ); |
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| 251 | |
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| 252 | if ( status == -1 ) |
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| 253 | return (mqd_t) -1; |
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| 254 | |
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| 255 | return (mqd_t) &the_mq->Object.id; |
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| 256 | } |
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| 257 | |
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| 258 | /*PAGE |
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| 259 | * |
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| 260 | * _POSIX_Message_queue_Delete |
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| 261 | */ |
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| 262 | |
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| 263 | void _POSIX_Message_queue_Delete( |
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| 264 | POSIX_Message_queue_Control *the_mq |
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| 265 | ) |
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| 266 | { |
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| 267 | if ( !the_mq->linked && !the_mq->open_count ) { |
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| 268 | _POSIX_Message_queue_Free( the_mq ); |
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| 269 | |
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[93994fdb] | 270 | #if defined(RTEMS_MULTIPROCESSING) |
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[5e9b32b] | 271 | if ( the_mq->process_shared == PTHREAD_PROCESS_SHARED ) { |
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| 272 | |
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| 273 | _Objects_MP_Close( |
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| 274 | &_POSIX_Message_queue_Information, |
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| 275 | the_mq->Object.id |
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| 276 | ); |
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| 277 | |
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| 278 | _POSIX_Message_queue_MP_Send_process_packet( |
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| 279 | POSIX_MESSAGE_QUEUE_MP_ANNOUNCE_DELETE, |
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| 280 | the_mq->Object.id, |
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| 281 | 0, /* Not used */ |
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| 282 | 0 /* Not used */ |
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| 283 | ); |
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| 284 | } |
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[93994fdb] | 285 | #endif |
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[5e9b32b] | 286 | |
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| 287 | } |
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| 288 | } |
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| 289 | |
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| 290 | /*PAGE |
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| 291 | * |
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| 292 | * 15.2.2 Close a Message Queue, P1003.1b-1993, p. 275 |
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| 293 | */ |
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| 294 | |
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| 295 | int mq_close( |
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| 296 | mqd_t mqdes |
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| 297 | ) |
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| 298 | { |
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| 299 | register POSIX_Message_queue_Control *the_mq; |
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| 300 | Objects_Locations location; |
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| 301 | |
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| 302 | the_mq = _POSIX_Message_queue_Get( mqdes, &location ); |
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| 303 | switch ( location ) { |
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| 304 | case OBJECTS_ERROR: |
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[93994fdb] | 305 | set_errno_and_return_minus_one( EINVAL ); |
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[5e9b32b] | 306 | case OBJECTS_REMOTE: |
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| 307 | _Thread_Dispatch(); |
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| 308 | return POSIX_MP_NOT_IMPLEMENTED(); |
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[93994fdb] | 309 | set_errno_and_return_minus_one( EINVAL ); |
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[5e9b32b] | 310 | case OBJECTS_LOCAL: |
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| 311 | the_mq->open_count -= 1; |
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| 312 | _POSIX_Message_queue_Delete( the_mq ); |
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| 313 | _Thread_Enable_dispatch(); |
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| 314 | return 0; |
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| 315 | } |
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| 316 | return POSIX_BOTTOM_REACHED(); |
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| 317 | } |
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| 318 | |
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| 319 | /*PAGE |
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| 320 | * |
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| 321 | * 15.2.2 Remove a Message Queue, P1003.1b-1993, p. 276 |
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| 322 | */ |
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| 323 | |
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| 324 | int mq_unlink( |
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| 325 | const char *name |
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| 326 | ) |
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| 327 | { |
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| 328 | int status; |
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| 329 | register POSIX_Message_queue_Control *the_mq; |
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| 330 | Objects_Id the_mq_id; |
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| 331 | Objects_Locations location; |
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| 332 | |
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| 333 | status = _POSIX_Message_queue_Name_to_id( name, &the_mq_id ); |
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| 334 | |
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[05ce4e09] | 335 | if ( !status ) |
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| 336 | set_errno_and_return_minus_one( status ); |
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[5e9b32b] | 337 | |
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| 338 | the_mq = _POSIX_Message_queue_Get( the_mq_id, &location ); |
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| 339 | switch ( location ) { |
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| 340 | case OBJECTS_ERROR: |
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[93994fdb] | 341 | set_errno_and_return_minus_one( EINVAL ); |
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[5e9b32b] | 342 | case OBJECTS_REMOTE: |
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| 343 | _Thread_Dispatch(); |
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| 344 | return POSIX_MP_NOT_IMPLEMENTED(); |
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[93994fdb] | 345 | set_errno_and_return_minus_one( EINVAL ); |
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[5e9b32b] | 346 | case OBJECTS_LOCAL: |
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| 347 | |
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[93994fdb] | 348 | #if defined(RTEMS_MULTIPROCESSING) |
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[5e9b32b] | 349 | _Objects_MP_Close( |
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| 350 | &_POSIX_Message_queue_Information, |
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| 351 | the_mq->Object.id |
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| 352 | ); |
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[93994fdb] | 353 | #endif |
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[5e9b32b] | 354 | |
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| 355 | the_mq->linked = FALSE; |
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| 356 | |
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| 357 | _POSIX_Message_queue_Delete( the_mq ); |
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| 358 | |
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| 359 | _Thread_Enable_dispatch(); |
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| 360 | return 0; |
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| 361 | } |
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| 362 | return POSIX_BOTTOM_REACHED(); |
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| 363 | } |
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| 364 | |
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| 365 | /*PAGE |
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| 366 | * |
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| 367 | * _POSIX_Message_queue_Send_support |
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| 368 | */ |
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| 369 | |
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| 370 | int _POSIX_Message_queue_Send_support( |
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| 371 | mqd_t mqdes, |
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| 372 | const char *msg_ptr, |
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| 373 | unsigned32 msg_len, |
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| 374 | Priority_Control msg_prio, |
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| 375 | Watchdog_Interval timeout |
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| 376 | ) |
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| 377 | { |
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| 378 | register POSIX_Message_queue_Control *the_mq; |
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| 379 | Objects_Locations location; |
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| 380 | |
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| 381 | the_mq = _POSIX_Message_queue_Get( mqdes, &location ); |
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| 382 | switch ( location ) { |
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| 383 | case OBJECTS_ERROR: |
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[93994fdb] | 384 | set_errno_and_return_minus_one( EINVAL ); |
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[5e9b32b] | 385 | case OBJECTS_REMOTE: |
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| 386 | _Thread_Dispatch(); |
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| 387 | return POSIX_MP_NOT_IMPLEMENTED(); |
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[93994fdb] | 388 | set_errno_and_return_minus_one( EINVAL ); |
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[5e9b32b] | 389 | case OBJECTS_LOCAL: |
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| 390 | /* XXX must add support for timeout and priority */ |
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| 391 | _CORE_message_queue_Send( |
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| 392 | &the_mq->Message_queue, |
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| 393 | (void *) msg_ptr, |
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| 394 | msg_len, |
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| 395 | mqdes, |
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[93994fdb] | 396 | #if defined(RTEMS_MULTIPROCESSING) |
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[5e9b32b] | 397 | NULL /* XXX _POSIX_Message_queue_Core_message_queue_mp_support*/ |
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[93994fdb] | 398 | #else |
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| 399 | NULL |
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| 400 | #endif |
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[5e9b32b] | 401 | ); |
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| 402 | _Thread_Enable_dispatch(); |
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| 403 | return _Thread_Executing->Wait.return_code; |
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| 404 | } |
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| 405 | return POSIX_BOTTOM_REACHED(); |
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| 406 | } |
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| 407 | |
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| 408 | /*PAGE |
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| 409 | * |
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| 410 | * 15.2.4 Send a Message to a Message Queue, P1003.1b-1993, p. 277 |
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| 411 | * |
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| 412 | * NOTE: P1003.4b/D8, p. 45 adds mq_timedsend(). |
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| 413 | */ |
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| 414 | |
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| 415 | int mq_send( |
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| 416 | mqd_t mqdes, |
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| 417 | const char *msg_ptr, |
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| 418 | size_t msg_len, |
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| 419 | unsigned int msg_prio |
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| 420 | ) |
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| 421 | { |
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| 422 | return _POSIX_Message_queue_Send_support( |
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| 423 | mqdes, |
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| 424 | msg_ptr, |
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| 425 | msg_len, |
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| 426 | msg_prio, |
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| 427 | THREAD_QUEUE_WAIT_FOREVER |
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| 428 | ); |
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| 429 | } |
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| 430 | |
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| 431 | /*PAGE |
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| 432 | * |
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| 433 | * 15.2.4 Send a Message to a Message Queue, P1003.1b-1993, p. 277 |
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| 434 | * |
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| 435 | * NOTE: P1003.4b/D8, p. 45 adds mq_timedsend(). |
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| 436 | */ |
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| 437 | |
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| 438 | int mq_timedsend( |
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| 439 | mqd_t mqdes, |
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| 440 | const char *msg_ptr, |
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| 441 | size_t msg_len, |
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| 442 | unsigned int msg_prio, |
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| 443 | const struct timespec *timeout |
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| 444 | ) |
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| 445 | { |
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| 446 | return _POSIX_Message_queue_Send_support( |
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| 447 | mqdes, |
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| 448 | msg_ptr, |
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| 449 | msg_len, |
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| 450 | msg_prio, |
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[5b748a1] | 451 | _POSIX_Timespec_to_interval( timeout ) |
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[5e9b32b] | 452 | ); |
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| 453 | } |
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| 454 | |
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| 455 | /*PAGE |
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| 456 | * |
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| 457 | * _POSIX_Message_queue_Receive_support |
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| 458 | */ |
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| 459 | |
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| 460 | /* XXX be careful ... watch the size going through all the layers ... */ |
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| 461 | |
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| 462 | ssize_t _POSIX_Message_queue_Receive_support( |
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| 463 | mqd_t mqdes, |
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| 464 | char *msg_ptr, |
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| 465 | size_t msg_len, |
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| 466 | unsigned int *msg_prio, |
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| 467 | Watchdog_Interval timeout |
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| 468 | ) |
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| 469 | { |
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| 470 | register POSIX_Message_queue_Control *the_mq; |
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| 471 | Objects_Locations location; |
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| 472 | unsigned32 status = 0; |
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| 473 | unsigned32 length_out; |
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| 474 | |
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| 475 | the_mq = _POSIX_Message_queue_Get( mqdes, &location ); |
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| 476 | switch ( location ) { |
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| 477 | case OBJECTS_ERROR: |
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[93994fdb] | 478 | set_errno_and_return_minus_one( EINVAL ); |
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[5e9b32b] | 479 | case OBJECTS_REMOTE: |
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| 480 | _Thread_Dispatch(); |
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| 481 | return POSIX_MP_NOT_IMPLEMENTED(); |
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[93994fdb] | 482 | set_errno_and_return_minus_one( EINVAL ); |
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[5e9b32b] | 483 | case OBJECTS_LOCAL: |
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| 484 | /* XXX need to define the options argument to this */ |
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| 485 | length_out = msg_len; |
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| 486 | _CORE_message_queue_Seize( |
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| 487 | &the_mq->Message_queue, |
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| 488 | mqdes, |
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| 489 | msg_ptr, |
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| 490 | &length_out, |
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| 491 | /* msg_prio, XXXX */ |
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| 492 | the_mq->blocking, |
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| 493 | timeout |
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| 494 | ); |
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| 495 | _Thread_Enable_dispatch(); |
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| 496 | if ( !status ) |
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| 497 | return length_out; |
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| 498 | /* XXX --- the return codes gotta be looked at .. fix this */ |
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| 499 | return _Thread_Executing->Wait.return_code; |
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| 500 | } |
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| 501 | return POSIX_BOTTOM_REACHED(); |
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| 502 | } |
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| 503 | |
---|
| 504 | /*PAGE |
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| 505 | * |
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| 506 | * 15.2.5 Receive a Message From a Message Queue, P1003.1b-1993, p. 279 |
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| 507 | * |
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| 508 | * NOTE: P1003.4b/D8, p. 45 adds mq_timedreceive(). |
---|
| 509 | */ |
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| 510 | |
---|
| 511 | ssize_t mq_receive( |
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| 512 | mqd_t mqdes, |
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| 513 | char *msg_ptr, |
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| 514 | size_t msg_len, |
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| 515 | unsigned int *msg_prio |
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| 516 | ) |
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| 517 | { |
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| 518 | return _POSIX_Message_queue_Receive_support( |
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| 519 | mqdes, |
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| 520 | msg_ptr, |
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| 521 | msg_len, |
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| 522 | msg_prio, |
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| 523 | THREAD_QUEUE_WAIT_FOREVER |
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| 524 | ); |
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| 525 | } |
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| 526 | |
---|
| 527 | /*PAGE |
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| 528 | * |
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| 529 | * 15.2.5 Receive a Message From a Message Queue, P1003.1b-1993, p. 279 |
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| 530 | * |
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| 531 | * NOTE: P1003.4b/D8, p. 45 adds mq_timedreceive(). |
---|
| 532 | */ |
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| 533 | |
---|
| 534 | int mq_timedreceive( /* XXX: should this be ssize_t */ |
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| 535 | mqd_t mqdes, |
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| 536 | char *msg_ptr, |
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| 537 | size_t msg_len, |
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| 538 | unsigned int *msg_prio, |
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| 539 | const struct timespec *timeout |
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| 540 | ) |
---|
| 541 | { |
---|
| 542 | return _POSIX_Message_queue_Receive_support( |
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| 543 | mqdes, |
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| 544 | msg_ptr, |
---|
| 545 | msg_len, |
---|
| 546 | msg_prio, |
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[5b748a1] | 547 | _POSIX_Timespec_to_interval( timeout ) |
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[5e9b32b] | 548 | ); |
---|
| 549 | } |
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| 550 | |
---|
| 551 | /*PAGE |
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| 552 | * |
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| 553 | * _POSIX_Message_queue_Notify_handler |
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| 554 | * |
---|
| 555 | */ |
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| 556 | |
---|
| 557 | void _POSIX_Message_queue_Notify_handler( |
---|
| 558 | void *user_data |
---|
| 559 | ) |
---|
| 560 | { |
---|
| 561 | POSIX_Message_queue_Control *the_mq; |
---|
| 562 | |
---|
| 563 | the_mq = user_data; |
---|
| 564 | |
---|
| 565 | /* XXX do something with signals here!!!! */ |
---|
| 566 | } |
---|
| 567 | |
---|
| 568 | /*PAGE |
---|
| 569 | * |
---|
| 570 | * 15.2.6 Notify Process that a Message is Available on a Queue, |
---|
| 571 | * P1003.1b-1993, p. 280 |
---|
| 572 | */ |
---|
| 573 | |
---|
| 574 | int mq_notify( |
---|
| 575 | mqd_t mqdes, |
---|
| 576 | const struct sigevent *notification |
---|
| 577 | ) |
---|
| 578 | { |
---|
| 579 | register POSIX_Message_queue_Control *the_mq; |
---|
| 580 | Objects_Locations location; |
---|
| 581 | |
---|
| 582 | the_mq = _POSIX_Message_queue_Get( mqdes, &location ); |
---|
| 583 | switch ( location ) { |
---|
| 584 | case OBJECTS_ERROR: |
---|
[93994fdb] | 585 | set_errno_and_return_minus_one( EBADF ); |
---|
[5e9b32b] | 586 | case OBJECTS_REMOTE: |
---|
| 587 | _Thread_Dispatch(); |
---|
| 588 | return POSIX_MP_NOT_IMPLEMENTED(); |
---|
[93994fdb] | 589 | set_errno_and_return_minus_one( EINVAL ); |
---|
[5e9b32b] | 590 | case OBJECTS_LOCAL: |
---|
| 591 | if ( notification ) { |
---|
| 592 | if ( _CORE_message_queue_Is_notify_enabled( &the_mq->Message_queue ) ) { |
---|
| 593 | _Thread_Enable_dispatch(); |
---|
[93994fdb] | 594 | set_errno_and_return_minus_one( EBUSY ); |
---|
[5e9b32b] | 595 | } |
---|
| 596 | |
---|
| 597 | _CORE_message_queue_Set_notify( &the_mq->Message_queue, NULL, NULL ); |
---|
| 598 | |
---|
| 599 | the_mq->notification = *notification; |
---|
| 600 | |
---|
| 601 | _CORE_message_queue_Set_notify( |
---|
| 602 | &the_mq->Message_queue, |
---|
| 603 | _POSIX_Message_queue_Notify_handler, |
---|
| 604 | the_mq |
---|
| 605 | ); |
---|
| 606 | } else { |
---|
| 607 | |
---|
| 608 | _CORE_message_queue_Set_notify( &the_mq->Message_queue, NULL, NULL ); |
---|
| 609 | |
---|
| 610 | } |
---|
| 611 | |
---|
| 612 | _Thread_Enable_dispatch(); |
---|
| 613 | return 0; |
---|
| 614 | } |
---|
| 615 | return POSIX_BOTTOM_REACHED(); |
---|
| 616 | } |
---|
| 617 | |
---|
| 618 | /*PAGE |
---|
| 619 | * |
---|
| 620 | * 15.2.7 Set Message Queue Attributes, P1003.1b-1993, p. 281 |
---|
| 621 | */ |
---|
| 622 | |
---|
| 623 | int mq_setattr( |
---|
| 624 | mqd_t mqdes, |
---|
| 625 | const struct mq_attr *mqstat, |
---|
| 626 | struct mq_attr *omqstat |
---|
| 627 | ) |
---|
| 628 | { |
---|
| 629 | register POSIX_Message_queue_Control *the_mq; |
---|
| 630 | Objects_Locations location; |
---|
| 631 | CORE_message_queue_Attributes *the_mq_attr; |
---|
| 632 | |
---|
| 633 | the_mq = _POSIX_Message_queue_Get( mqdes, &location ); |
---|
| 634 | switch ( location ) { |
---|
| 635 | case OBJECTS_ERROR: |
---|
[93994fdb] | 636 | set_errno_and_return_minus_one( EINVAL ); |
---|
[5e9b32b] | 637 | case OBJECTS_REMOTE: |
---|
| 638 | _Thread_Dispatch(); |
---|
| 639 | return POSIX_MP_NOT_IMPLEMENTED(); |
---|
[93994fdb] | 640 | set_errno_and_return_minus_one( EINVAL ); |
---|
[5e9b32b] | 641 | case OBJECTS_LOCAL: |
---|
| 642 | /* |
---|
| 643 | * Return the old values. |
---|
| 644 | */ |
---|
| 645 | |
---|
| 646 | /* XXX this is the same stuff as is in mq_getattr... and probably */ |
---|
| 647 | /* XXX should be in an inlined private routine */ |
---|
| 648 | |
---|
| 649 | the_mq_attr = &the_mq->Message_queue.Attributes; |
---|
| 650 | |
---|
| 651 | omqstat->mq_flags = the_mq->flags; |
---|
| 652 | omqstat->mq_msgsize = the_mq->Message_queue.maximum_message_size; |
---|
| 653 | omqstat->mq_maxmsg = the_mq->Message_queue.maximum_pending_messages; |
---|
| 654 | omqstat->mq_curmsgs = the_mq->Message_queue.number_of_pending_messages; |
---|
| 655 | |
---|
| 656 | /* |
---|
| 657 | * Ignore everything except the O_NONBLOCK bit. |
---|
| 658 | */ |
---|
| 659 | |
---|
| 660 | if ( mqstat->mq_flags & O_NONBLOCK ) |
---|
| 661 | the_mq->blocking = FALSE; |
---|
| 662 | else |
---|
| 663 | the_mq->blocking = TRUE; |
---|
| 664 | |
---|
| 665 | the_mq->flags = mqstat->mq_flags; |
---|
| 666 | |
---|
| 667 | _Thread_Enable_dispatch(); |
---|
| 668 | return 0; |
---|
| 669 | } |
---|
| 670 | return POSIX_BOTTOM_REACHED(); |
---|
| 671 | } |
---|
| 672 | |
---|
| 673 | /*PAGE |
---|
| 674 | * |
---|
| 675 | * 15.2.8 Get Message Queue Attributes, P1003.1b-1993, p. 283 |
---|
| 676 | */ |
---|
| 677 | |
---|
| 678 | int mq_getattr( |
---|
| 679 | mqd_t mqdes, |
---|
| 680 | struct mq_attr *mqstat |
---|
| 681 | ) |
---|
| 682 | { |
---|
| 683 | register POSIX_Message_queue_Control *the_mq; |
---|
| 684 | Objects_Locations location; |
---|
| 685 | CORE_message_queue_Attributes *the_mq_attr; |
---|
| 686 | |
---|
| 687 | the_mq = _POSIX_Message_queue_Get( mqdes, &location ); |
---|
| 688 | switch ( location ) { |
---|
| 689 | case OBJECTS_ERROR: |
---|
[93994fdb] | 690 | set_errno_and_return_minus_one( EINVAL ); |
---|
[5e9b32b] | 691 | case OBJECTS_REMOTE: |
---|
| 692 | _Thread_Dispatch(); |
---|
| 693 | return POSIX_MP_NOT_IMPLEMENTED(); |
---|
[93994fdb] | 694 | set_errno_and_return_minus_one( EINVAL ); |
---|
[5e9b32b] | 695 | case OBJECTS_LOCAL: |
---|
| 696 | /* |
---|
| 697 | * Return the old values. |
---|
| 698 | */ |
---|
| 699 | |
---|
| 700 | /* XXX this is the same stuff as is in mq_setattr... and probably */ |
---|
| 701 | /* XXX should be in an inlined private routine */ |
---|
| 702 | |
---|
| 703 | the_mq_attr = &the_mq->Message_queue.Attributes; |
---|
| 704 | |
---|
| 705 | mqstat->mq_flags = the_mq->flags; |
---|
| 706 | mqstat->mq_msgsize = the_mq->Message_queue.maximum_message_size; |
---|
| 707 | mqstat->mq_maxmsg = the_mq->Message_queue.maximum_pending_messages; |
---|
| 708 | mqstat->mq_curmsgs = the_mq->Message_queue.number_of_pending_messages; |
---|
| 709 | |
---|
| 710 | _Thread_Enable_dispatch(); |
---|
| 711 | return 0; |
---|
| 712 | } |
---|
| 713 | return POSIX_BOTTOM_REACHED(); |
---|
| 714 | } |
---|