2.11BSD#431 - /usr/src/sys/h/callout.h

   1: /*
   2:  * Copyright (c) 1986 Regents of the University of California.
   3:  * All rights reserved.  The Berkeley software License Agreement
   4:  * specifies the terms and conditions for redistribution.
   5:  *
   6:  *	@(#)callout.h	1.1 (2.10BSD Berkeley) 12/1/86
   7:  */
   8: 
   9: /*
  10:  * The callout structure is for
  11:  * a routine arranging
  12:  * to be called by the clock interrupt
  13:  * (clock.c) with a specified argument,
  14:  * in a specified amount of time.
  15:  * Used, for example, to time tab
  16:  * delays on typewriters.
  17:  *
  18:  * The c_time field is stored in terms of ticks.  Therefore, no callout
  19:  * may be scheduled past around 8 minutes on a 60 HZ machine.  This is
  20:  * good as it avoids long operations on clock ticks.  If you are ever
  21:  * forced to use a long, you might as well start doing the real-time
  22:  * timer as a timeout like 4.3BSD.
  23:  */
  24: 
  25: struct  callout {
  26:     int c_time;     /* incremental time */
  27:     caddr_t c_arg;      /* argument to routine */
  28:     int (*c_func)();    /* routine */
  29:     struct  callout *c_next;
  30: };
  31: #if defined(KERNEL) && !defined(SUPERVISOR)
  32: struct  callout *callfree, callout[], calltodo;
  33: int ncallout;
  34: #endif

Defined variables

Defined struct's

Usage of this include