minix/servers/pm/const.h

   1 /* Constants used by the Process Manager. */
   2
   3 #define NR_PIDS        30000    /* process ids range from 0 to NR_PIDS-1.
   4                                  * (magic constant: some old applications use
   5                                  * a 'short' instead of pid_t.)
   6                                  */
   7
   8 #define NO_PID             0    /* pid value indicating no process */
   9 #define INIT_PID           1    /* INIT's process id number */
  10
  11 #define NO_TRACER          0    /* process is not being traced */
  12
  13 #define MAX_CLOCK_T     ((unsigned long) 1 << ((sizeof(clock_t) * 8) - 1))
  14 #define MAX_SECS        ( (clock_t) (MAX_CLOCK_T/system_hz) )
  15                                 /* max.secs for setitimer() ((2^31-1)/HZ) */
  16 #define NR_ITIMERS         3    /* number of supported interval timers */
  17
  18 #define SEND_PRIORITY      1    /* send current priority queue to scheduler */
  19 #define SEND_TIME_SLICE    2    /* send current time slice to scheduler */