ppos/test/pingpong-sleep.c

   1 // PingPongOS - PingPong Operating System
   2 // Prof. Carlos A. Maziero, DINF UFPR
   3 // Versão 2.0 -- Junho de 2025
   4
   5 // ATENÇÃO: ESTE ARQUIVO NÃO DEVE SER ALTERADO;
   6 // ALTERAÇÕES SERÃO DESCARTADAS NA CORREÇÃO.
   7
   8 // Teste da função task_sleep()
   9
  10 #include <assert.h>
  11 #include "lib/libc.h"
  12 #include "ppos.h"
  13
  14 static struct task_t *pang, *peng, *ping, *pong, *pung;
  15
  16 // corpo das tarefas
  17 void body(void *arg)
  18 {
  19     int i, t_sleep, t_before, t_after;
  20     char *status;
  21
  22     printf("%5d ms: %s: inicio\n", systime(), (char *)arg);
  23     for (i = 0; i < 20; i++)
  24     {
  25         // sorteia tempo entre 0 e 2000 ms (2s), em saltos de 100 ms
  26         t_sleep = 100 * (randnum() % 21);
  27
  28         // informa o quanto vai dormir
  29         printf("%5d ms: %s vai dormir %d ms\n",
  30                systime(), (char *)arg, t_sleep);
  31
  32         // registra tempo antes e depois de dormir
  33         t_before = systime();
  34         task_sleep(t_sleep);
  35         t_after = systime();
  36
  37         // verifica se dormiu o intervalo especificado
  38         status = (t_after - t_before) == t_sleep ? "ok" : "ERRADO";
  39
  40         // informa o quanto efetivamente dormiu
  41         printf("%5d ms: %s dormiu     %d ms (%s)\n", systime(),
  42                (char *)arg, t_after - t_before, status);
  43     }
  44     printf("%5d ms: %s: fim\n", systime(), (char *)arg);
  45     task_exit(0);
  46 }
  47
  48 // corpo da tarefa principal
  49 void user_main(void *arg)
  50 {
  51     int status;
  52
  53     printf("%5d ms: user: inicio\n", systime());
  54
  55     // cria tarefas
  56     pang = task_create("pang", body, "\tPang");
  57     assert(pang);
  58     peng = task_create("peng", body, "\t\tPeng");
  59     assert(peng);
  60     ping = task_create("ping", body, "\t\t\tPing");
  61     assert(ping);
  62     pong = task_create("pong", body, "\t\t\t\tPong");
  63     assert(pong);
  64     pung = task_create("pung", body, "\t\t\t\t\tPung");
  65     assert(pung);
  66
  67     // aguarda tarefas concluirem
  68     printf("%5d ms: user: espera Pang...\n", systime());
  69     status = task_wait(pang);
  70     assert(status == NOERROR);
  71     printf("%5d ms: user: Pang acabou\n", systime());
  72
  73     printf("%5d ms: user: espera Peng...\n", systime());
  74     status = task_wait(peng);
  75     assert(status == NOERROR);
  76     printf("%5d ms: user: Peng acabou\n", systime());
  77
  78     printf("%5d ms: user: espera Ping...\n", systime());
  79     status = task_wait(ping);
  80     assert(status == NOERROR);
  81     printf("%5d ms: user: Ping acabou\n", systime());
  82
  83     printf("%5d ms: user: espera Pong...\n", systime());
  84     status = task_wait(pong);
  85     assert(status == NOERROR);
  86     printf("%5d ms: user: Pong acabou\n", systime());
  87
  88     printf("%5d ms: user: espera Pung...\n", systime());
  89     status = task_wait(pung);
  90     assert(status == NOERROR);
  91     printf("%5d ms: user: Pung acabou\n", systime());
  92
  93     // destroi descritores
  94     status = task_destroy(pang);
  95     assert(status == NOERROR);
  96     status = task_destroy(peng);
  97     assert(status == NOERROR);
  98     status = task_destroy(ping);
  99     assert(status == NOERROR);
 100     status = task_destroy(pong);
 101     assert(status == NOERROR);
 102     status = task_destroy(pung);
 103     assert(status == NOERROR);
 104
 105     printf("%5d ms: user: fim\n", systime());
 106
 107     task_exit(0);
 108 }