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b168057a | 1 | /* Copyright (C) 2006-2015 Free Software Foundation, Inc. |
f17efcb4 UD |
2 | This file is part of the GNU C Library. |
3 | Contributed by Jakub Jelinek <jakub@redhat.com>, 2006. | |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
f17efcb4 UD |
18 | |
19 | #include <errno.h> | |
20 | #include <pthread.h> | |
21 | #include <sched.h> | |
22 | #include <stdio.h> | |
23 | #include <stdlib.h> | |
24 | #include <string.h> | |
25 | #include <unistd.h> | |
26 | #include <sys/syscall.h> | |
27 | ||
28 | /* This test is Linux specific. */ | |
29 | #define CHECK_TPP_PRIORITY(normal, boosted) \ | |
30 | do \ | |
31 | { \ | |
32 | pid_t tid = syscall (__NR_gettid); \ | |
33 | \ | |
34 | struct sched_param cep_sp; \ | |
35 | int cep_policy; \ | |
36 | if (pthread_getschedparam (pthread_self (), &cep_policy, \ | |
37 | &cep_sp) != 0) \ | |
38 | { \ | |
39 | puts ("getschedparam failed"); \ | |
40 | ret = 1; \ | |
41 | } \ | |
42 | else if (cep_sp.sched_priority != (normal)) \ | |
43 | { \ | |
44 | printf ("unexpected priority %d != %d\n", \ | |
45 | cep_sp.sched_priority, (normal)); \ | |
46 | } \ | |
47 | if (syscall (__NR_sched_getparam, tid, &cep_sp) == 0 \ | |
48 | && cep_sp.sched_priority != (boosted)) \ | |
49 | { \ | |
50 | printf ("unexpected boosted priority %d != %d\n", \ | |
51 | cep_sp.sched_priority, (boosted)); \ | |
52 | ret = 1; \ | |
53 | } \ | |
54 | } \ | |
55 | while (0) | |
56 | ||
57 | int fifo_min, fifo_max; | |
58 | ||
59 | void | |
60 | init_tpp_test (void) | |
61 | { | |
62 | fifo_min = sched_get_priority_min (SCHED_FIFO); | |
63 | if (fifo_min < 0) | |
64 | { | |
65 | printf ("couldn't get min priority for SCHED_FIFO: %m\n"); | |
66 | exit (1); | |
67 | } | |
68 | ||
69 | fifo_max = sched_get_priority_max (SCHED_FIFO); | |
70 | if (fifo_max < 0) | |
71 | { | |
72 | printf ("couldn't get max priority for SCHED_FIFO: %m\n"); | |
73 | exit (1); | |
74 | } | |
75 | ||
76 | if (fifo_min > 4 || fifo_max < 10) | |
77 | { | |
78 | printf ("%d..%d SCHED_FIFO priority interval not suitable for this test\n", | |
79 | fifo_min, fifo_max); | |
80 | exit (0); | |
81 | } | |
82 | ||
83 | struct sched_param sp; | |
84 | memset (&sp, 0, sizeof (sp)); | |
85 | sp.sched_priority = 4; | |
86 | int e = pthread_setschedparam (pthread_self (), SCHED_FIFO, &sp); | |
87 | if (e != 0) | |
88 | { | |
89 | errno = e; | |
90 | printf ("cannot set scheduling params: %m\n"); | |
91 | exit (0); | |
92 | } | |
93 | } |