client/task.c

   1 #include <stdlib.h>
   2 #include <string.h>
   3
   4 #include "task.h"
   5 #include "spec.h"
   6 #include "interface.h"
   7
   8 struct task tasks[MAXTASKS];
   9
  10 void task_init(void)
  11 {
  12         memset(&tasks, 0, sizeof(struct task)*MAXTASKS);
  13 }
  14
  15 void task_register(void)
  16 {
  17         uint8_t ct;
  18         uint16_t i;
  19
  20         for(ct = 0; ct<MAXTASKS; ct++)
  21                 if(!tasks[ct].used)
  22                         break;
  23         if(ct == MAXTASKS)
  24                 die("Trying to add too much tasks...");
  25
  26         memset(&tasks[ct], 0, sizeof(struct task));
  27         //Read interval
  28         tasks[ct].interval = read16();
  29
  30         //Interrupt task
  31         if(is_interrupt_task(&tasks[ct])) {
  32
  33         }
  34
  35         //Read tasklength
  36         tasks[ct].tlen = read16();
  37         debug("task interval: %d, length: %d\n",
  38               tasks[ct].interval, tasks[ct].tlen);
  39
  40         if(tasks[ct].tlen > MAXTASKSIZE)
  41                 die("Task is too long: %d", tasks[ct].tlen);
  42         //Read task bytecode
  43         for(i = 0; i<tasks[ct].tlen; i++){
  44                 tasks[ct].bc[i] = read_byte();
  45         }
  46         //Return the task number for later removal
  47         debug("Received a task of length %d", tasks[ct].tlen);
  48         tasks[ct].used = true;
  49         tasks[ct].lastrun = 0L;
  50
  51         write_byte('t');
  52         write16(ct);
  53         write_byte('\n');
  54 }
  55
  56 bool is_interrupt_task(struct task *t)
  57 {
  58         return t->interval & (2 <<14);
  59 }
  60
  61 bool had_interrupt(struct task* t)
  62 {
  63         //Not implemented yet...
  64         return false;
  65         (void)t;
  66 }
  67
  68 void task_delete(void)
  69 {
  70         uint8_t c = read16();
  71         tasks[c].used = false;
  72         write_byte('d');
  73         write16(c);
  74         write_byte('\n');
  75 }
  76
  77 struct task *task_get(int num)
  78 {
  79         return tasks[num].used ? &tasks[num] : NULL;
  80 }