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(T_META_NAMESPACE("xnu.quicktest"), T_META_CHECK_LEAKS(false));
   9
  10 T_DECL(getpriority_setpriority, "Tests getpriority and setpriority system calls", T_META_ASROOT(true))
  11 {
  12         int my_priority;
  13         int my_new_priority;
  14
  15         /* getpriority returns scheduling priority so -1 is a valid value */
  16         errno       = 0;
  17         my_priority = getpriority(PRIO_PROCESS, 0);
  18
  19         T_WITH_ERRNO;
  20         T_ASSERT_FALSE(my_priority == -1 && errno != 0, "Verify getpriority is successful", NULL);
  21
  22         /* change scheduling priority*/
  23         my_new_priority = (my_priority == PRIO_MIN) ? (my_priority + 10) : (PRIO_MIN);
  24
  25         T_WITH_ERRNO;
  26         T_ASSERT_POSIX_SUCCESS(setpriority(PRIO_PROCESS, 0, my_new_priority), "Change scheduling priority", NULL);
  27
  28         /* verify change */
  29         errno       = 0;
  30         my_priority = getpriority(PRIO_PROCESS, 0);
  31         T_WITH_ERRNO;
  32         T_ASSERT_FALSE(my_priority == -1 && errno != 0, "Verify getpriority change is successful", NULL);
  33
  34         T_WITH_ERRNO;
  35         T_ASSERT_EQ(my_priority, my_new_priority, "Verify setpriority correctly set scheduling priority", NULL);
  36
  37         /* reset scheduling priority */
  38         T_WITH_ERRNO;
  39         T_ASSERT_POSIX_SUCCESS(setpriority(PRIO_PROCESS, 0, 0), "Reset scheduling priority", NULL);
  40 }