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58 lines
1.5 KiB
C
58 lines
1.5 KiB
C
/*
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* simple_allocator.c
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*
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* Copyright 2013, 2014 Michael Zillgith
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*
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* This file is part of libIEC61850.
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*
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* libIEC61850 is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* libIEC61850 is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with libIEC61850. If not, see <http://www.gnu.org/licenses/>.
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*
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* See COPYING file for the complete license text.
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*/
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#include <stdlib.h>
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#include "simple_allocator.h"
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void
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MemoryAllocator_init(MemoryAllocator* self, char* memoryBlock, int size)
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{
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self->memoryBlock = memoryBlock;
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self->currentPtr = memoryBlock;
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self->size = size;
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}
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static int
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getAlignedSize(int size)
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{
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if ((size % sizeof(void*)) > 0)
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return sizeof(void*) * ((size + sizeof(void*)) / sizeof(void*));
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else
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return size;
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}
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char*
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MemoryAllocator_allocate(MemoryAllocator* self, int size)
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{
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size = getAlignedSize(size);
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if (((self->currentPtr - self->memoryBlock) + size) <= self->size) {
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char* ptr = self->currentPtr;
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self->currentPtr += size;
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return ptr;
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}
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else
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return NULL;
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}
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