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/* |
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* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd). |
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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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/*! \file balloc.h |
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* \brief A block allocator |
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* \version $Id$ |
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* \todo Get rid of all typedefs in this file |
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*/ |
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#ifndef INCLUDED_balloc_h |
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#define INCLUDED_balloc_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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/*! \brief Block contains status information for |
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* an allocated block in our 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; /*!< Size of data space for each block */ |
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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; /*!< Chain of free memory blocks */ |
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dlink_list used_list; /*!< Chain of used memory blocks */ |
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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; /*!< Node for linking into free_list or used_list */ |
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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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/*! \brief 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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const char *name; /*!< Name of the heap */ |
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struct BlockHeap *next; /*!< Pointer to next heap */ |
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}; |
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typedef struct BlockHeap BlockHeap; |
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extern int BlockHeapFree(BlockHeap *, void *); |
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extern void * BlockHeapAlloc(BlockHeap *); |
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extern BlockHeap* BlockHeapCreate(const char *const, size_t, int); |
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extern int BlockHeapDestroy(BlockHeap *); |
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extern void initBlockHeap(void); |
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extern size_t block_heap_get_used_mem(const BlockHeap *); |
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extern size_t block_heap_get_free_mem(const BlockHeap *); |
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extern size_t block_heap_get_size_mem(const BlockHeap *); |
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extern unsigned int block_heap_get_used_elm(const BlockHeap *); |
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extern unsigned int block_heap_get_free_elm(const BlockHeap *); |
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extern unsigned int block_heap_get_size_elm(const BlockHeap *); |
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#else /* NOBALLOC */ |
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typedef struct BlockHeap BlockHeap; |
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/* This is really kludgy, passing ints as pointers is always bad. */ |
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#define BlockHeapCreate(blah, es, epb) ((BlockHeap*)(es)) |
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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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extern BlockHeap *heap_list; |
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#endif /* INCLUDED_balloc_h */ |
