[1e1b3e00] | 1 | /* |
---|
| 2 | * Message Queue Manager |
---|
| 3 | * |
---|
| 4 | * |
---|
[08311cc3] | 5 | * COPYRIGHT (c) 1989-1999. |
---|
[1e1b3e00] | 6 | * On-Line Applications Research Corporation (OAR). |
---|
| 7 | * |
---|
| 8 | * The license and distribution terms for this file may be |
---|
| 9 | * found in the file LICENSE in this distribution or at |
---|
| 10 | * http://www.OARcorp.com/rtems/license.html. |
---|
| 11 | * |
---|
| 12 | * $Id$ |
---|
| 13 | */ |
---|
| 14 | |
---|
| 15 | #include <rtems/system.h> |
---|
| 16 | #include <rtems/score/sysstate.h> |
---|
| 17 | #include <rtems/score/chain.h> |
---|
| 18 | #include <rtems/score/isr.h> |
---|
| 19 | #include <rtems/score/coremsg.h> |
---|
| 20 | #include <rtems/score/object.h> |
---|
| 21 | #include <rtems/score/states.h> |
---|
| 22 | #include <rtems/score/thread.h> |
---|
| 23 | #include <rtems/score/wkspace.h> |
---|
| 24 | #if defined(RTEMS_MULTIPROCESSING) |
---|
| 25 | #include <rtems/score/mpci.h> |
---|
| 26 | #endif |
---|
| 27 | #include <rtems/rtems/status.h> |
---|
| 28 | #include <rtems/rtems/attr.h> |
---|
| 29 | #include <rtems/rtems/message.h> |
---|
| 30 | #include <rtems/rtems/options.h> |
---|
| 31 | #include <rtems/rtems/support.h> |
---|
| 32 | |
---|
| 33 | /*PAGE |
---|
| 34 | * |
---|
| 35 | * rtems_message_queue_receive |
---|
| 36 | * |
---|
| 37 | * This directive dequeues a message from the designated message queue |
---|
| 38 | * and copies it into the requesting thread's buffer. |
---|
| 39 | * |
---|
| 40 | * Input parameters: |
---|
| 41 | * id - queue id |
---|
| 42 | * buffer - pointer to message buffer |
---|
| 43 | * size - size of message receive |
---|
| 44 | * option_set - options on receive |
---|
| 45 | * timeout - number of ticks to wait |
---|
| 46 | * |
---|
| 47 | * Output parameters: |
---|
| 48 | * RTEMS_SUCCESSFUL - if successful |
---|
| 49 | * error code - if unsuccessful |
---|
| 50 | */ |
---|
| 51 | |
---|
| 52 | rtems_status_code rtems_message_queue_receive( |
---|
| 53 | Objects_Id id, |
---|
| 54 | void *buffer, |
---|
| 55 | unsigned32 *size, |
---|
| 56 | unsigned32 option_set, |
---|
| 57 | rtems_interval timeout |
---|
| 58 | ) |
---|
| 59 | { |
---|
| 60 | register Message_queue_Control *the_message_queue; |
---|
| 61 | Objects_Locations location; |
---|
| 62 | boolean wait; |
---|
| 63 | |
---|
| 64 | the_message_queue = _Message_queue_Get( id, &location ); |
---|
| 65 | switch ( location ) { |
---|
| 66 | |
---|
| 67 | case OBJECTS_REMOTE: |
---|
| 68 | #if defined(RTEMS_MULTIPROCESSING) |
---|
| 69 | return _Message_queue_MP_Send_request_packet( |
---|
| 70 | MESSAGE_QUEUE_MP_RECEIVE_REQUEST, |
---|
| 71 | id, |
---|
| 72 | buffer, |
---|
| 73 | size, |
---|
| 74 | option_set, |
---|
| 75 | timeout |
---|
| 76 | ); |
---|
| 77 | #endif |
---|
| 78 | |
---|
| 79 | case OBJECTS_ERROR: |
---|
| 80 | return RTEMS_INVALID_ID; |
---|
| 81 | |
---|
| 82 | case OBJECTS_LOCAL: |
---|
| 83 | if ( _Options_Is_no_wait( option_set ) ) |
---|
| 84 | wait = FALSE; |
---|
| 85 | else |
---|
| 86 | wait = TRUE; |
---|
| 87 | |
---|
| 88 | _CORE_message_queue_Seize( |
---|
| 89 | &the_message_queue->message_queue, |
---|
| 90 | the_message_queue->Object.id, |
---|
| 91 | buffer, |
---|
| 92 | size, |
---|
| 93 | wait, |
---|
| 94 | timeout |
---|
| 95 | ); |
---|
| 96 | _Thread_Enable_dispatch(); |
---|
| 97 | return( _Message_queue_Translate_core_message_queue_return_code( |
---|
| 98 | _Thread_Executing->Wait.return_code ) ); |
---|
| 99 | |
---|
| 100 | } |
---|
| 101 | |
---|
| 102 | return RTEMS_INTERNAL_ERROR; /* unreached - only to remove warnings */ |
---|
| 103 | } |
---|