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/*******************************************************************************
* Copyright (c) 2011 protos software gmbh (http://www.protos.de).
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* CONTRIBUTORS:
* Thomas Schuetz (initial contribution)
*
*******************************************************************************/
#include "etMessageService.h"
#include "debugging/etLogger.h"
#include "debugging/etMSCLogger.h"
/*
* initialize message service with all needed data and initialize message queue and message pool
*
*/
void etMessageService_init(etMessageService* self, etUInt8* buffer, etUInt16 maxBlocks, etUInt16 blockSize, etDispatcherReceiveMessage msgDispatcher){
ET_MSC_LOGGER_SYNC_ENTRY("etMessageService", "init")
/* copy init data to self */
self->messageBuffer.buffer = buffer;
self->messageBuffer.maxBlocks = maxBlocks;
self->messageBuffer.blockSize = blockSize;
self->msgDispatcher = msgDispatcher;
/* copy init queue and pool */
etMessageQueue_init( &(self->messagePool) ); /* the pool is also a queue*/
etMessageQueue_init( &(self->messageQueue) );
etMessageService_initMessagePool(self);
/* init mutexes and semaphores */
etMutex_construct( &(self->poolMutex) );
etMutex_construct( &(self->queueMutex) );
etSema_construct( &(self->executionSemaphore) );
ET_MSC_LOGGER_SYNC_EXIT
}
void etMessageService_start(etMessageService* self){
ET_MSC_LOGGER_SYNC_ENTRY("etMessageService", "start")
etThread_construct( &(self->thread) );
ET_MSC_LOGGER_SYNC_EXIT
}
void etMessageService_stop(etMessageService* self){
ET_MSC_LOGGER_SYNC_ENTRY("etMessageService", "stop")
etThread_destruct( &(self->thread) );
ET_MSC_LOGGER_SYNC_EXIT
}
void etMessageService_destroy(etMessageService* self){
ET_MSC_LOGGER_SYNC_ENTRY("etMessageService", "destroy")
etMutex_destruct( &(self->poolMutex) );
etMutex_destruct( &(self->queueMutex) );
etSema_destruct( &(self->executionSemaphore) );
ET_MSC_LOGGER_SYNC_EXIT
}
/*
* initialize message pool with block buffer
* all blocks are added to pool
*/
void etMessageService_initMessagePool(etMessageService* self){
ET_MSC_LOGGER_SYNC_ENTRY("etMessageService", "initMessagePool")
etInt16 i;
for (i=0; i<self->messageBuffer.maxBlocks; i++){
etMessage* block = (etMessage*) &self->messageBuffer.buffer[i*self->messageBuffer.blockSize];
etMessageQueue_push(&self->messagePool, block);
}
ET_MSC_LOGGER_SYNC_EXIT
}
void etMessageService_pushMessage(etMessageService* self, etMessage* msg){
ET_MSC_LOGGER_SYNC_ENTRY("etMessageService", "pushMessage")
etMutex_enter(&self->queueMutex);
etMessageQueue_push(&self->messageQueue, msg);
etSema_wakeup(&self->executionSemaphore);
etMutex_leave(&self->queueMutex);
ET_MSC_LOGGER_SYNC_EXIT
}
etMessage* etMessageService_popMessage(etMessageService* self){
ET_MSC_LOGGER_SYNC_ENTRY("etMessageService", "popMessage")
etMutex_enter(&self->queueMutex);
etMessage* msg = etMessageQueue_pop(&self->messageQueue);
etMutex_leave(&self->queueMutex);
ET_MSC_LOGGER_SYNC_EXIT
return msg;
}
etMessage* etMessageService_getMessageBuffer(etMessageService* self, etUInt16 size){
ET_MSC_LOGGER_SYNC_ENTRY("etMessageService", "getMessageBuffer")
etMutex_enter(&self->poolMutex);
if (size<=self->messageBuffer.blockSize){
if (self->messagePool.size>0){
etMessage* msg = etMessageQueue_pop(&self->messagePool);
etMutex_leave(&self->poolMutex);
ET_MSC_LOGGER_SYNC_EXIT
return msg;
}
}
etMutex_leave(&self->poolMutex);
ET_MSC_LOGGER_SYNC_EXIT
return NULL;
}
void etMessageService_returnMessageBuffer(etMessageService* self, etMessage* buffer){
ET_MSC_LOGGER_SYNC_ENTRY("etMessageService", "returnMessageBuffer")
etMutex_enter(&self->poolMutex);
etMessageQueue_push(&self->messagePool, buffer);
etMutex_leave(&self->poolMutex);
ET_MSC_LOGGER_SYNC_EXIT
}
void etMessageService_deliverAllMessages(etMessageService* self){
ET_MSC_LOGGER_SYNC_ENTRY("etMessageService", "deliverAllMessages")
while (TRUE){
while (etMessageQueue_isNotEmpty(&self->messageQueue)){
etMessage* msg = etMessageService_popMessage(self);
self->msgDispatcher(msg);
etMessageService_returnMessageBuffer(self, msg);
}
etSema_waitForWakeup(&self->executionSemaphore);
}
ET_MSC_LOGGER_SYNC_EXIT
}
void etMessageService_execute(etMessageService* self){
ET_MSC_LOGGER_SYNC_ENTRY("etMessageService", "execute")
etMessageService_deliverAllMessages(self);
ET_MSC_LOGGER_SYNC_EXIT
}
etInt16 etMessageService_getMessagePoolLowWaterMark(etMessageService* self){
ET_MSC_LOGGER_SYNC_ENTRY("etMessageService", "getMessagePoolLowWaterMark")
etInt16 lowWaterMark = self->messageBuffer.maxBlocks - etMessageQueue_getHighWaterMark(&self->messageQueue);
ET_MSC_LOGGER_SYNC_EXIT
return lowWaterMark;
}
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