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glibc  2.9
Defines | Functions
tst-nice.c File Reference
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include "../test-skeleton.c"

Go to the source code of this file.

Defines

#define TEST_FUNCTION   do_test ()

Functions

static int do_test (void)

Define Documentation

#define TEST_FUNCTION   do_test ()

Definition at line 65 of file tst-nice.c.


Function Documentation

static int do_test ( void  ) [static]

Definition at line 26 of file tst-nice.c.

{
  int ret;
  const int incr = 10;
  int old;

  /* Discover current nice value.  */
  errno = 0;
  old = nice (0);
  if (old == -1 && errno != 0)
    {
      printf ("break: nice(%d) return: %d, %m\n", 0, old);
      return 1;
    }

  /* Nice ourselves up.  */
  errno = 0;
  ret = nice (incr);
  if (ret == -1 && errno != 0)
    {
      printf ("break: nice(%d) return: %d, %m\n", incr, ret);
      return 1;
    }

  /* Check for return value being zero when it shouldn't.  Cannot simply
     check for expected value since nice values are capped at 2^n-1.
     But we assume that we didn't start at the cap and so should have
     increased some.  */
  if (ret <= old)
    {
      printf ("FAIL: retval (%d) of nice(%d) != %d\n", ret, incr, old + incr);
      return 1;
    }

  printf ("PASS: nice(%d) from %d return: %d\n", incr, old, ret);

  return 0;
}

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