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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_VariableSize.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); \
}
typedef struct etVariableSizeMemory {
etMemory base; /** the "base class" */
etUInt8* current; /**< next free position on the heap */
} etVariableSizeMemory;
void* etMemory_VariableSize_alloc(etMemory* heap, etUInt16 size) {
etVariableSizeMemory* self = (etVariableSizeMemory*) heap;
void* mem = NULL;
size = MEM_CEIL(size);
DO_LOCK
if (self->current + size < ((etUInt8*)self) + self->base.size) {
etUInt32 used;
mem = (void*) self->current;
self->current += size;
used = ((etUInt8*)self) + self->base.size - self->current;
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_VariableSize_free(etMemory* heap, void* obj) {
ET_MSC_LOGGER_SYNC_ENTRY("etMemory", "free")
/* do nothing */
ET_MSC_LOGGER_SYNC_EXIT
}
/*
* the public interface
*/
etMemory* etMemory_VariableSize_init(void* heap, etUInt32 size) {
etVariableSizeMemory* self = (etVariableSizeMemory*) heap;
etUInt32 data_size = MEM_CEIL(sizeof(etVariableSizeMemory));
etUInt32 actual_size = size - data_size;
etMemory* result = NULL;
ET_MSC_LOGGER_SYNC_ENTRY("etMemory", "init")
if (heap!=NULL && size > data_size) {
result = &self->base;
etMemory_init(result, actual_size, etMemory_VariableSize_alloc, etMemory_VariableSize_free);
self->current = ((etUInt8*)self)+data_size;
}
ET_MSC_LOGGER_SYNC_EXIT
return result;
}
etUInt8 etMemory_VariableSize_freeHeapMem(etMemory* mem) {
etVariableSizeMemory* self = (etVariableSizeMemory*) mem;
return ((etUInt8*) self) + self->base.size - self->current;
}
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