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/*******************************************************************************
* Copyright (c) 2012 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:
* Henrik Rentz-Reichert (initial contribution)
*
*******************************************************************************/
#include "base/etMemory_FixedSize.h"
#include "base/etQueue.h"
#include "debugging/etLogger.h"
#include "debugging/etMSCLogger.h"
#define DO_LOCK \
if (self->base.lock!=NULL) { \
self->base.lock->lockFct(self->base.lock->lockData); \
}
#define DO_UNLOCK \
if (self->base.lock!=NULL) { \
self->base.lock->unlockFct(self->base.lock->lockData); \
}
#define GET_FREE (etQueue_getSize(&self->blockPool) * self->blockSize)
typedef struct etFixedSizeMemory {
etMemory base;
etUInt8 *buffer; /**< the heap to be allocated from */
etUInt16 maxBlocks; /**< the maximum number of blocks */
etUInt16 blockSize; /**< block size */
etQueue blockPool; /**< pool of free blocks */
} etFixedSizeMemory;
void* etMemory_FixedSize_alloc(etMemory* heap, etUInt16 size) {
etFixedSizeMemory* self = (etFixedSizeMemory*) heap;
void* mem = NULL;
size = MEM_CEIL(size);
ET_MSC_LOGGER_SYNC_ENTRY("etMemory_FixedSize", "alloc")
DO_LOCK
if (size<=self->blockSize){
if (self->blockPool.size>0) {
etUInt32 used;
mem = etQueue_pop(&self->blockPool);
used = self->base.size - GET_FREE;
if (used > self->base.statistics.maxUsed) {
self->base.statistics.maxUsed = used;
}
}
}
if (mem==NULL) {
self->base.statistics.nFailingRequests++;
}
DO_UNLOCK
ET_MSC_LOGGER_SYNC_EXIT
return mem;
}
void etMemory_FixedSize_free(etMemory* heap, void* obj) {
etFixedSizeMemory* self = (etFixedSizeMemory*) heap;
ET_MSC_LOGGER_SYNC_ENTRY("etMemory_FixedSize", "free")
DO_LOCK
etQueue_push(&self->blockPool, obj);
DO_UNLOCK
ET_MSC_LOGGER_SYNC_EXIT
}
/*
* the public interface
*/
etMemory* etMemory_FixedSize_init(void* heap, etUInt32 size, etUInt16 blockSize) {
etFixedSizeMemory* self = (etFixedSizeMemory*) heap;
etUInt32 data_size = MEM_CEIL(sizeof(etFixedSizeMemory));
etUInt32 actual_size = size - data_size;
etMemory* result = NULL;
int i;
ET_MSC_LOGGER_SYNC_ENTRY("etMemory_FixedSize", "init")
if (heap!=NULL && size > data_size) {
result = &self->base;
etMemory_init(result, actual_size, etMemory_FixedSize_alloc, etMemory_FixedSize_free);
self->buffer = ((etUInt8*) self) + data_size;
self->blockSize = blockSize;
self->maxBlocks = (size - data_size) / self->blockSize;
etQueue_init(&self->blockPool);
for (i=0; i<self->maxBlocks; i++){
void* block = &(self->buffer[i*self->blockSize]);
etQueue_push(&self->blockPool, block);
}
}
ET_MSC_LOGGER_SYNC_EXIT
return result;
}
etUInt32 etMemory_FixedSize_getFreeHeapMem(etMemory* mem) {
etFixedSizeMemory* self = (etFixedSizeMemory*) mem;
etUInt32 result;
ET_MSC_LOGGER_SYNC_ENTRY("etMemory_FixedSize", "getFreeHeapMem")
DO_LOCK
result = GET_FREE;
DO_UNLOCK
ET_MSC_LOGGER_SYNC_EXIT
return result;
}
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