#define DBG 			if(debug) print#define THNAMESZ		40	/* Maz size for thread name */ enum{	Xctl 	= 1,	Xdir,	Xapp,					/* application files */}; typedef struct Data Data;			/* user data */typedef struct Faux Faux;			/* file aux	 */typedef struct FauxList FauxList;	/* file aux list */typedef struct Ctl Ctl;				/* ctl data */ struct Data {	char *val;	int valsz;}; struct Faux {	ushort ftype;	/* Dchan File type */	Channel *chan;	/* Channel for file data */	uint chansize;	Reqqueue *rq;	/* queue for read requests */	Reqqueue *wq;	/* queue for write requests */	File *file;	char *fullpath;	uint open;		/* number of clients that have this file open */	QLock openl;	/* lock for open/clunk update */ 	/* statistics */	QLock slock;	ulong nwrites;	/* number of writes in interval */	ulong nreads;	/* number of reads in interval */ 	long rx;		/* receive rate (req/s) */	long tx;		/* transmission rate (req/s) */	long avgrx;		/* average receive rate */	long avgtx;		/* average transmission rate */ 	char rthreadname[THNAMESZ];	/* reader thread name */	char wthreadname[THNAMESZ];	/* writer thread name */	}; struct FauxList {	Faux *aux;	FauxList *next;}; /* data type used to synchronize access to file channels */struct Ctl {	Channel *rwok;	/* reader/writer threads notify channel */	Channel *done;	/* ctl notify successfull updates here */	int onctl; 	QLock l;}; static int debug;	/* enable debugging info */