typedef struct Pool Pool;struct Pool {	char*	name;	ulong	maxsize; 	ulong	cursize;	ulong	curfree;	ulong	curalloc; 	ulong	minarena;	/* smallest size of new arena */	ulong	quantum;	/* allocated blocks should be multiple of */	ulong	minblock;	/* smallest newly allocated block */ 	void*	freeroot;	/* actually Free* */	void*	arenalist;	/* actually Arena* */ 	void*	(*alloc)(ulong);	int		(*merge)(void*, void*);	void		(*move)(void* from, void* to); 	int		flags;	int		nfree;	int		lastcompact; 	void		(*lock)(Pool*);	void		(*unlock)(Pool*);	void		(*print)(Pool*, char*, ...);	void		(*panic)(Pool*, char*, ...);	void		(*logstack)(Pool*); 	void*	private;}; extern void*	poolalloc(Pool*, ulong);extern void	poolfree(Pool*, void*);extern ulong	poolmsize(Pool*, void*);extern void*	poolrealloc(Pool*, void*, ulong);extern void	poolcheck(Pool*);extern int		poolcompact(Pool*);extern void	poolblockcheck(Pool*, void*); extern Pool*	mainmem;extern Pool*	imagmem; enum {	/* flags */	POOL_ANTAGONISM	= 1<<0,	POOL_PARANOIA		= 1<<1,	POOL_VERBOSITY		= 1<<2,	POOL_DEBUGGING		= 1<<3,	POOL_LOGGING		= 1<<4,	POOL_TOLERANCE		= 1<<5,	POOL_NOREUSE		= 1<<6,};