98 lines
2.8 KiB
C
98 lines
2.8 KiB
C
/*
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* NeoIRCd: NeoStats Group. Based on Hybird7
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* balloc.h: The ircd block allocator header.
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*
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* Copyright (C) 2002 by the past and present ircd coders, and others.
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*
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* This program 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 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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 this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA
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*
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* $Id: balloc.h,v 1.3 2002/09/13 06:50:06 fishwaldo Exp $
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*/
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#ifndef INCLUDED_blalloc_h
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#define INCLUDED_blalloc_h
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#include "setup.h"
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#ifndef NOBALLOC
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#include "tools.h"
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#include "memory.h"
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#include "ircd_defs.h"
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/*
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* Block contains status information for an allocated block in our
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* heap.
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*/
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struct Block {
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int freeElems; /* Number of available elems */
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size_t alloc_size;
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struct Block* next; /* Next in our chain of blocks */
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void* elems; /* Points to allocated memory */
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dlink_list free_list;
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dlink_list used_list;
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};
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typedef struct Block Block;
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struct MemBlock {
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dlink_node self;
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Block *block; /* Which block we belong to */
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};
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typedef struct MemBlock MemBlock;
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/*
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* BlockHeap contains the information for the root node of the
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* memory heap.
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*/
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struct BlockHeap {
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size_t elemSize; /* Size of each element to be stored */
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int elemsPerBlock; /* Number of elements per block */
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int blocksAllocated; /* Number of blocks allocated */
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int freeElems; /* Number of free elements */
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Block* base; /* Pointer to first block */
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};
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typedef struct BlockHeap BlockHeap;
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extern int BlockHeapFree(BlockHeap *bh, void *ptr);
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extern void * BlockHeapAlloc(BlockHeap *bh);
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extern BlockHeap* BlockHeapCreate(size_t elemsize, int elemsperblock);
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extern int BlockHeapDestroy(BlockHeap *bh);
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extern int BlockHeapGarbageCollect(BlockHeap *);
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extern void initBlockHeap(void);
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#else /* NOBALLOC */
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typedef struct BlockHeap BlockHeap;
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#define initBlockHeap()
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#define BlockHeapGarbageCollect(x)
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/* This is really kludgy, passing ints as pointers is always bad. */
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#define BlockHeapCreate(es, epb) ((BlockHeap*)(es))
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#define BlockHeapDestroy(x)
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#define BlockHeapAlloc(x) MyMalloc((int)x)
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#define BlockHeapFree(x,y) MyFree(y)
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#endif /* NOBALLOC */
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#endif /* INCLUDED_blalloc_h */
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