/* (-lgl * Coherent 386 release 4.2 * Copyright (c) 1982, 1993 by Mark Williams Company. * All rights reserved. May not be copied without permission. * For copying permission and licensing info, write licensing@mwc.com -lgl) */ #ifndef __KERNEL__TOID_H__ #define __KERNEL__TOID_H__ /* * This internal header file defines the DDI/DKI data type 'toid_t'. This * type is used as a handle (or 'cookie') for timeout events so that they * can be cancelled after being scheduled. The format of the handle data * is opaque. * * Handles are never explicitly released in the DDI/DKI, so using a pointer to * an event cell may not be a good idea (that's the theory; in practice, most * clients of the DDI/DKI timeout system do not use a timeout handle once * the timeout has run). * * Because clients need to pass these items as parameters and assign them to * variables, a pointer to an incomplete type would be a natural * representation. However, since a pointer is inappropriate here, we use a * large scalar type. Clients are cautioned not to perform any operation * other than assignment on such items, however. */ typedef unsigned long toid_t; /* * The maximum-value defined below can't be used without <limits.h>, but we * define it here because it depends critically on the type of toid_t. */ #define TOID_MAX ULONG_MAX #endif /* ! defined (__KERNEL__TOID_H__) */