1 | /* |
---|
2 | * CORE Message Queue Handler |
---|
3 | * |
---|
4 | * DESCRIPTION: |
---|
5 | * |
---|
6 | * This package is the implementation of the CORE Message Queue Handler. |
---|
7 | * This core object provides task synchronization and communication functions |
---|
8 | * via messages passed to queue objects. |
---|
9 | * |
---|
10 | * COPYRIGHT (c) 1989-1999. |
---|
11 | * On-Line Applications Research Corporation (OAR). |
---|
12 | * |
---|
13 | * The license and distribution terms for this file may be |
---|
14 | * found in the file LICENSE in this distribution or at |
---|
15 | * http://www.rtems.com/license/LICENSE. |
---|
16 | * |
---|
17 | * $Id$ |
---|
18 | */ |
---|
19 | |
---|
20 | #if HAVE_CONFIG_H |
---|
21 | #include "config.h" |
---|
22 | #endif |
---|
23 | |
---|
24 | #include <rtems/system.h> |
---|
25 | #include <rtems/score/chain.h> |
---|
26 | #include <rtems/score/isr.h> |
---|
27 | #include <rtems/score/object.h> |
---|
28 | #include <rtems/score/coremsg.h> |
---|
29 | #include <rtems/score/states.h> |
---|
30 | #include <rtems/score/thread.h> |
---|
31 | #include <rtems/score/wkspace.h> |
---|
32 | #if defined(RTEMS_MULTIPROCESSING) |
---|
33 | #include <rtems/score/mpci.h> |
---|
34 | #endif |
---|
35 | |
---|
36 | /*PAGE |
---|
37 | * |
---|
38 | * _CORE_message_queue_Flush |
---|
39 | * |
---|
40 | * This function flushes the message_queue's pending message queue. The |
---|
41 | * number of messages flushed from the queue is returned. |
---|
42 | * |
---|
43 | * Input parameters: |
---|
44 | * the_message_queue - the message_queue to be flushed |
---|
45 | * |
---|
46 | * Output parameters: |
---|
47 | * returns - the number of messages flushed from the queue |
---|
48 | */ |
---|
49 | |
---|
50 | uint32_t _CORE_message_queue_Flush( |
---|
51 | CORE_message_queue_Control *the_message_queue |
---|
52 | ) |
---|
53 | { |
---|
54 | if ( the_message_queue->number_of_pending_messages != 0 ) |
---|
55 | return _CORE_message_queue_Flush_support( the_message_queue ); |
---|
56 | else |
---|
57 | return 0; |
---|
58 | } |
---|