/*
*  defines that are only applicable to the IBM PC/ PC-DOS environment
*  other files will take this one's place for other machines
*/
typedef unsigned long u_long;
typedef unsigned short u_short;
typedef unsigned char u_char;

/*
 *	defines for pointers
 */
#undef NULL
#define NULL	((void *)0)

/*
 *	defines for clock related values
 */
#define TICKSPERSEC 18		/* actually 18.2 (91/5) ticks per second */
#define WRAPTIME 1572480L	/* in ticks, only for PC */

/*
 *	used by tcpport->flag
 */
#define	O_NDELAY	0x01
#define O_GOTALL	0x20
#define O_CLOSING	0x40
#define O_CLOSED	0x80
