core/schedulealloc.c

   1 /* schedulealloc.c */
   2
   3 #include "schedule.h"
   4 #include <stdlib.h>
   5
   6 #define ALLOCUNIT 100
   7
   8 schedule *freescheds;
   9
  10 void initschedulealloc() {
  11   freescheds=NULL;
  12 }
  13
  14 schedule *getschedule() {
  15   int i;
  16   schedule *sp;
  17
  18   if (freescheds==NULL) {
  19     freescheds=(schedule *)malloc(ALLOCUNIT*sizeof(schedule));
  20     for (i=0;i<ALLOCUNIT-1;i++) {
  21       freescheds[i].callbackparam=(void *)&(freescheds[i+1]);
  22     }
  23     freescheds[ALLOCUNIT-1].callbackparam=NULL;
  24   }
  25
  26   sp=freescheds;
  27   freescheds=(schedule *)sp->callbackparam;
  28
  29   return sp;
  30 }
  31
  32 void freeschedule(schedule *sp) {
  33   sp->callbackparam=(void *)freescheds;
  34   sp->callback=NULL;
  35   freescheds=sp;
  36 }
  37