tests/xnu_quick_test_getsetpriority.c

   1 #include <darwintest.h>
   2
   3 #include <stdlib.h>
   4 #include <unistd.h>
   5 #include <sys/stat.h>
   6 #include <sys/wait.h>
   7
   8 T_GLOBAL_META(
   9         T_META_NAMESPACE("xnu.quicktest"),
  10         T_META_CHECK_LEAKS(false),
  11         T_META_RUN_CONCURRENTLY(true)
  12         );
  13
  14 T_DECL(getpriority_setpriority, "Tests getpriority and setpriority system calls", T_META_ASROOT(true))
  15 {
  16         int my_priority;
  17         int my_new_priority;
  18
  19         /* getpriority returns scheduling priority so -1 is a valid value */
  20         errno       = 0;
  21         my_priority = getpriority(PRIO_PROCESS, 0);
  22
  23         T_WITH_ERRNO;
  24         T_ASSERT_FALSE(my_priority == -1 && errno != 0, "Verify getpriority is successful", NULL);
  25
  26         /* change scheduling priority*/
  27         my_new_priority = (my_priority == PRIO_MIN) ? (my_priority + 10) : (PRIO_MIN);
  28
  29         T_WITH_ERRNO;
  30         T_ASSERT_POSIX_SUCCESS(setpriority(PRIO_PROCESS, 0, my_new_priority), "Change scheduling priority", NULL);
  31
  32         /* verify change */
  33         errno       = 0;
  34         my_priority = getpriority(PRIO_PROCESS, 0);
  35         T_WITH_ERRNO;
  36         T_ASSERT_FALSE(my_priority == -1 && errno != 0, "Verify getpriority change is successful", NULL);
  37
  38         T_WITH_ERRNO;
  39         T_ASSERT_EQ(my_priority, my_new_priority, "Verify setpriority correctly set scheduling priority", NULL);
  40
  41         /* reset scheduling priority */
  42         T_WITH_ERRNO;
  43         T_ASSERT_POSIX_SUCCESS(setpriority(PRIO_PROCESS, 0, 0), "Reset scheduling priority", NULL);
  44 }