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1/* Copyright (C) 2002-2019 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
18
19#include <errno.h>
20#include <pthread.h>
21#include <stdio.h>
22#include <stdlib.h>
23#include <time.h>
24
25/* This test is a template for other tests to use. Other tests define
26 the following macros to change the behaviour of the template test.
27 The test is very simple, it configures N threads given the parameters
28 below and then proceeds to go through mutex lock and unlock
29 operations in each thread as described before for the thread
30 function. */
31#ifndef TYPE
32# define TYPE PTHREAD_MUTEX_DEFAULT
33#endif
34#ifndef ROBUST
35# define ROBUST PTHREAD_MUTEX_STALLED
36#endif
37#ifndef DELAY_NSEC
38# define DELAY_NSEC 11000
39#endif
40#ifndef ROUNDS
41# define ROUNDS 1000
42#endif
43#ifndef N
44# define N 100
45#endif
46
47static pthread_mutex_t lock;
48
49/* Each thread locks and the subsequently unlocks the lock, yielding
50 the smallest critical section possible. After the unlock the thread
51 waits DELAY_NSEC nanoseconds before doing the lock and unlock again.
52 Every thread does this ROUNDS times. The lock and unlock are
53 checked for errors. */
54static void *
55tf (void *arg)
56{
57 int nr = (long int) arg;
58 int cnt;
59 struct timespec ts = { .tv_sec = 0, .tv_nsec = DELAY_NSEC };
60
61 for (cnt = 0; cnt < ROUNDS; ++cnt)
62 {
63 if (pthread_mutex_lock (&lock) != 0)
64 {
65 printf ("thread %d: failed to get the lock\n", nr);
66 return (void *) 1l;
67 }
68
69 if (pthread_mutex_unlock (&lock) != 0)
70 {
71 printf ("thread %d: failed to release the lock\n", nr);
72 return (void *) 1l;
73 }
74
75 if ((ts.tv_sec > 0) || (ts.tv_nsec > 0))
76 nanosleep (&ts, NULL);
77 }
78
79 return NULL;
80}
81
82/* Setup and run N threads, where each thread does as described
83 in the above thread function. The threads are given a minimal 1MiB
84 stack since they don't do anything between the lock and unlock. */
85static int
86do_test (void)
87{
88 pthread_mutexattr_t a;
89
90 if (pthread_mutexattr_init (&a) != 0)
91 {
92 puts ("mutexattr_init failed");
93 exit (1);
94 }
95
96 if (pthread_mutexattr_settype (&a, TYPE) != 0)
97 {
98 puts ("mutexattr_settype failed");
99 exit (1);
100 }
101
102 if (pthread_mutexattr_setrobust (&a, ROBUST) != 0)
103 {
104 puts ("mutexattr_setrobust failed");
105 exit (1);
106 }
107
108#ifdef ENABLE_PI
109 if (pthread_mutexattr_setprotocol (&a, PTHREAD_PRIO_INHERIT) != 0)
110 {
111 puts ("pthread_mutexattr_setprotocol failed");
112 return 1;
113 }
114#endif
115
116 int e = pthread_mutex_init (&lock, &a);
117 if (e != 0)
118 {
119#ifdef ENABLE_PI
120 if (e == ENOTSUP)
121 {
122 puts ("PI mutexes unsupported");
123 return 0;
124 }
125#endif
126 puts ("mutex_init failed");
127 return 1;
128 }
129
130 if (pthread_mutexattr_destroy (&a) != 0)
131 {
132 puts ("mutexattr_destroy failed");
133 return 1;
134 }
135
136 pthread_attr_t at;
137 pthread_t th[N];
138 int cnt;
139
140 if (pthread_attr_init (&at) != 0)
141 {
142 puts ("attr_init failed");
143 return 1;
144 }
145
146 if (pthread_attr_setstacksize (&at, 1 * 1024 * 1024) != 0)
147 {
148 puts ("attr_setstacksize failed");
149 return 1;
150 }
151
152 if (pthread_mutex_lock (&lock) != 0)
153 {
154 puts ("locking in parent failed");
155 return 1;
156 }
157
158 for (cnt = 0; cnt < N; ++cnt)
159 if (pthread_create (&th[cnt], &at, tf, (void *) (long int) cnt) != 0)
160 {
161 printf ("creating thread %d failed\n", cnt);
162 return 1;
163 }
164
165 if (pthread_attr_destroy (&at) != 0)
166 {
167 puts ("attr_destroy failed");
168 return 1;
169 }
170
171 if (pthread_mutex_unlock (&lock) != 0)
172 {
173 puts ("unlocking in parent failed");
174 return 1;
175 }
176
177 for (cnt = 0; cnt < N; ++cnt)
178 if (pthread_join (th[cnt], NULL) != 0)
179 {
180 printf ("joining thread %d failed\n", cnt);
181 return 1;
182 }
183
184 return 0;
185}
186
187#define TIMEOUT 60
188#define TEST_FUNCTION do_test ()
189#include "../test-skeleton.c"
190

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