File: tst-nice.c

package info (click to toggle)
glibc 2.19-18+deb8u9
  • links: PTS, VCS
  • area: main
  • in suites: jessie
  • size: 204,712 kB
  • ctags: 145,148
  • sloc: ansic: 970,427; asm: 241,207; sh: 10,069; makefile: 8,476; cpp: 3,595; perl: 2,077; pascal: 1,839; awk: 1,704; yacc: 317; sed: 73
file content (65 lines) | stat: -rw-r--r-- 1,858 bytes parent folder | download | duplicates (10)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
/* Copyright (C) 2003-2014 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#include <errno.h>
#include <stdio.h>
#include <unistd.h>


/* Test that nice() does not incorrectly return 0.  */
static int
do_test (void)
{
  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;
}

#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"