[4dc89814] | 1 | /* |
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| 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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| 13 | * |
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| 14 | * $Id$ |
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| 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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| 24 | |
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| 25 | #include <rtems/system.h> |
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| 26 | #include <rtems/score/watchdog.h> |
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| 27 | #include <rtems/posix/seterr.h> |
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| 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_Create_support |
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| 34 | */ |
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| 35 | |
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| 36 | int _POSIX_Message_queue_Create_support( |
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| 37 | const char *name, |
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| 38 | int pshared, |
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| 39 | unsigned int oflag, |
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[d4548d1] | 40 | struct mq_attr *attr_ptr, |
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[4dc89814] | 41 | POSIX_Message_queue_Control **message_queue |
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| 42 | ) |
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| 43 | { |
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| 44 | POSIX_Message_queue_Control *the_mq; |
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[d4548d1] | 45 | CORE_message_queue_Attributes *the_mq_attr; |
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| 46 | struct mq_attr attr; |
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| 47 | |
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[4dc89814] | 48 | _Thread_Disable_dispatch(); |
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| 49 | |
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[d4548d1] | 50 | if ( attr_ptr == NULL ) { |
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| 51 | attr.mq_maxmsg = 0; /* XXX */ |
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| 52 | attr.mq_msgsize = 0; /* XXX */ |
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| 53 | } else { |
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| 54 | if ( attr_ptr->mq_maxmsg < 0 ){ |
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| 55 | _Thread_Enable_dispatch(); |
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| 56 | set_errno_and_return_minus_one( EINVAL ); |
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| 57 | } |
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| 58 | |
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| 59 | if ( attr_ptr->mq_msgsize < 0 ){ |
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| 60 | _Thread_Enable_dispatch(); |
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| 61 | set_errno_and_return_minus_one( EINVAL ); |
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| 62 | } |
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| 63 | |
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| 64 | attr = *attr_ptr; |
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[4dc89814] | 65 | } |
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[d4548d1] | 66 | |
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[4dc89814] | 67 | #if defined(RTEMS_MULTIPROCESSING) |
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| 68 | if ( pshared == PTHREAD_PROCESS_SHARED && |
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| 69 | !( _Objects_MP_Allocate_and_open( &_POSIX_Message_queue_Information, 0, |
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| 70 | the_mq->Object.id, FALSE ) ) ) { |
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| 71 | _POSIX_Message_queue_Free( the_mq ); |
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| 72 | _Thread_Enable_dispatch(); |
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| 73 | set_errno_and_return_minus_one( ENFILE ); |
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| 74 | } |
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| 75 | #endif |
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| 76 | |
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[d4548d1] | 77 | if ( name ) { |
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| 78 | |
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| 79 | if( strlen(name) > PATH_MAX ) { /* XXX - Is strlen ok to use here ? */ |
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| 80 | _Thread_Enable_dispatch(); |
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| 81 | set_errno_and_return_minus_one( ENAMETOOLONG ); |
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| 82 | } |
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| 83 | |
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| 84 | /* |
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| 85 | * XXX Greater than NAME_MAX while POSIX_NO_TRUNC in effect. |
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| 86 | * XXX Error description in POSIX book different for mq_open and mq_unlink |
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| 87 | * Why??? |
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| 88 | */ |
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| 89 | } |
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| 90 | |
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| 91 | the_mq = _POSIX_Message_queue_Allocate(); |
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| 92 | if ( !the_mq ) { |
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| 93 | _Thread_Enable_dispatch(); |
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| 94 | set_errno_and_return_minus_one( ENFILE ); |
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| 95 | } |
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| 96 | |
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[4dc89814] | 97 | the_mq->process_shared = pshared; |
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| 98 | |
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| 99 | if ( name ) { |
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| 100 | the_mq->named = TRUE; |
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| 101 | the_mq->open_count = 1; |
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| 102 | the_mq->linked = TRUE; |
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[d4548d1] | 103 | } |
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| 104 | else { |
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[4dc89814] | 105 | the_mq->named = FALSE; |
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[d4548d1] | 106 | |
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| 107 | } |
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| 108 | |
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[4dc89814] | 109 | if ( oflag & O_NONBLOCK ) |
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| 110 | the_mq->blocking = FALSE; |
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| 111 | else |
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| 112 | the_mq->blocking = TRUE; |
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| 113 | |
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| 114 | /* XXX |
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| 115 | * |
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| 116 | * Note that this should be based on the current scheduling policy. |
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| 117 | */ |
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| 118 | |
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| 119 | /* XXX |
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| 120 | * |
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| 121 | * Message and waiting disciplines are not distinguished. |
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| 122 | */ |
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| 123 | /* |
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| 124 | the_mq_attr->message_discipline = CORE_MESSAGE_QUEUE_DISCIPLINES_FIFO; |
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| 125 | the_mq_attr->waiting_discipline = CORE_MESSAGE_QUEUE_DISCIPLINES_FIFO; |
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| 126 | */ |
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[d4548d1] | 127 | |
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[4dc89814] | 128 | |
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| 129 | the_mq->Message_queue.Attributes.discipline = |
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| 130 | CORE_MESSAGE_QUEUE_DISCIPLINES_FIFO; |
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[d4548d1] | 131 | the_mq_attr = &the_mq->Message_queue.Attributes; |
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| 132 | |
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[4dc89814] | 133 | if ( ! _CORE_message_queue_Initialize( |
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| 134 | &the_mq->Message_queue, |
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| 135 | OBJECTS_POSIX_MESSAGE_QUEUES, |
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[d4548d1] | 136 | the_mq_attr, |
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| 137 | attr.mq_maxmsg, |
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| 138 | attr.mq_msgsize, |
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[4dc89814] | 139 | #if defined(RTEMS_MULTIPROCESSING) |
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| 140 | _POSIX_Message_queue_MP_Send_extract_proxy |
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| 141 | #else |
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| 142 | NULL |
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| 143 | #endif |
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| 144 | ) ) { |
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| 145 | |
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| 146 | #if defined(RTEMS_MULTIPROCESSING) |
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| 147 | if ( pshared == PTHREAD_PROCESS_SHARED ) |
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| 148 | _Objects_MP_Close( &_POSIX_Message_queue_Information, the_mq->Object.id ); |
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| 149 | #endif |
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| 150 | |
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| 151 | _POSIX_Message_queue_Free( the_mq ); |
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| 152 | _Thread_Enable_dispatch(); |
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| 153 | set_errno_and_return_minus_one( ENOSPC ); |
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| 154 | } |
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| 155 | |
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| 156 | |
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| 157 | /* XXX - need Names to be a string!!! */ |
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| 158 | _Objects_Open( |
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| 159 | &_POSIX_Message_queue_Information, |
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| 160 | &the_mq->Object, |
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| 161 | (char *) name |
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| 162 | ); |
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| 163 | |
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| 164 | *message_queue = the_mq; |
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| 165 | |
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| 166 | #if defined(RTEMS_MULTIPROCESSING) |
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| 167 | if ( pshared == PTHREAD_PROCESS_SHARED ) |
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| 168 | _POSIX_Message_queue_MP_Send_process_packet( |
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| 169 | POSIX_MESSAGE_QUEUE_MP_ANNOUNCE_CREATE, |
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| 170 | the_mq->Object.id, |
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| 171 | (char *) name, |
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| 172 | 0 /* Not used */ |
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| 173 | ); |
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| 174 | #endif |
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| 175 | |
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| 176 | _Thread_Enable_dispatch(); |
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| 177 | return 0; |
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| 178 | } |
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| 179 | |
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[d4548d1] | 180 | |
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| 181 | |
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| 182 | |
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| 183 | |
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