Matthias
373a8c32b2
git-svn-id: file:///srv/dev-disk-by-uuid-17e88007-4d0c-45e0-8757-cacfcc458630/repositories/svn/Diplomarbeit@55 9fe90eed-be63-e94b-8204-d34ff4c2ff93
125 lines
3.3 KiB
C
125 lines
3.3 KiB
C
/* ---------------------------------------------------------------------------
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* MessageQueue.c - v0.1 (c) 2008 Micro-key bv
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* ---------------------------------------------------------------------------
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* Micro-key bv
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* Industrieweg 28, 9804 TG Noordhorn
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* Postbus 92, 9800 AB Zuidhorn
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* The Netherlands
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* Tel: +31 594 503020
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* Fax: +31 594 505825
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* Email: support@microkey.nl
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* Web: www.microkey.nl
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* ---------------------------------------------------------------------------
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* Description:
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* ---------------------------------------------------------------------------
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* Version(s): 0.1, Jan 29, 2008, FSc
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* Creation.
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* ---------------------------------------------------------------------------
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*/
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/* ---------------------------------------------------------------------------
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* System include files
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* ---------------------------------------------------------------------------
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*/
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#include <stdlib.h>
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#include <string.h>
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/* ---------------------------------------------------------------------------
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* Application include files
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* ---------------------------------------------------------------------------
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*/
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#include "MessageQueue.h"
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#include "FreeRTOS.h"
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#include "task.h"
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/* ---------------------------------------------------------------------------
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* Local constant and macro definitions
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* ---------------------------------------------------------------------------
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*/
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/* ---------------------------------------------------------------------------
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* Global variable definitions
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* ---------------------------------------------------------------------------
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*/
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/* ---------------------------------------------------------------------------
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* Local variable definitions
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* ---------------------------------------------------------------------------
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*/
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/* ---------------------------------------------------------------------------
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* Local function definitions
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* ---------------------------------------------------------------------------
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*/
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t_mq_messagequeue *mqInit()
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{
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t_mq_messagequeue *newMessageQueue = (t_mq_messagequeue *)pvPortMalloc( sizeof(t_mq_messagequeue) );
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newMessageQueue->count = 0;
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newMessageQueue->head = 0;
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newMessageQueue->tail = 0;
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return newMessageQueue;
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}
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RESULT mqAdd( t_mq_messagequeue *queue, t_bpmsg_message *message)
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{
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RESULT result = OK;
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taskENTER_CRITICAL();
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{
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if(queue->count >= TX_QUEUE_SIZE)
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{
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result = ERROR;
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}
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else
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{
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memcpy( &(queue->messages[queue->tail]), message, sizeof(t_bpmsg_message) );
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queue->count++;
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queue->tail = (queue->tail + 1) % TX_QUEUE_SIZE;
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}
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}
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taskEXIT_CRITICAL();
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return result;
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}
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RESULT mqGet( t_mq_messagequeue *queue, t_bpmsg_message *message)
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{
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RESULT result = OK;
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taskENTER_CRITICAL();
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{
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if(queue->count > 0)
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{
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memcpy( message, &(queue->messages[queue->head]), sizeof(t_bpmsg_message) );
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queue->head = (queue->head + 1) % TX_QUEUE_SIZE;
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queue->count--;
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}
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else
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{
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result = ERROR;
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}
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}
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taskEXIT_CRITICAL();
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return result;
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}
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BOOLEAN mqEmpty( t_mq_messagequeue *queue )
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{
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UINT8 count;
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taskENTER_CRITICAL();
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{
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count = queue->count;
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}
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taskEXIT_CRITICAL();
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return ( count == 0 ? TRUE : FALSE);
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}
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