1 /* Copyright (C) 2002-2023 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18 #include <errno.h>
19 #include <pthread.h>
20 #include <stdlib.h>
21 #include <stdio.h>
22 #include <string.h>
23 #include <sys/time.h>
24 #include <support/check.h>
25 #include <support/test-driver.h>
26 #include <support/timespec.h>
27 #include <support/xthread.h>
28 #include <support/xtime.h>
29
30
31 /* A bogus clock value that tells run_test to use pthread_rwlock_timedrdlock
32 and pthread_rwlock_timedwrlock rather than pthread_rwlock_clockrdlock and
33 pthread_rwlock_clockwrlock. */
34 #define CLOCK_USE_TIMEDLOCK (-1)
35
36 static int kind[] =
37 {
38 PTHREAD_RWLOCK_PREFER_READER_NP,
39 PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP,
40 PTHREAD_RWLOCK_PREFER_WRITER_NP,
41 };
42
43 struct thread_args
44 {
45 pthread_rwlock_t *rwlock;
46 clockid_t clockid;
47 const char *fnname;
48 };
49
50 static void *
51 tf (void *arg)
52 {
53 struct thread_args *args = arg;
54 pthread_rwlock_t *r = args->rwlock;
55 const clockid_t clockid = args->clockid;
56 const clockid_t clockid_for_get =
57 (clockid == CLOCK_USE_TIMEDLOCK) ? CLOCK_REALTIME : clockid;
58 const char *fnname = args->fnname;
59
60 /* Timeout: 0.3 secs. */
61 struct timespec ts_start;
62 xclock_gettime (clockid_for_get, &ts_start);
63
64 struct timespec ts_timeout = timespec_add (ts_start,
65 make_timespec (0, 300000000));
66
67 verbose_printf ("child calling %srdlock\n", fnname);
68
69 if (clockid == CLOCK_USE_TIMEDLOCK)
70 TEST_COMPARE (pthread_rwlock_timedrdlock (r, &ts_timeout), ETIMEDOUT);
71 else
72 TEST_COMPARE (pthread_rwlock_clockrdlock (r, clockid, &ts_timeout),
73 ETIMEDOUT);
74
75 verbose_printf ("1st child %srdlock done\n", fnname);
76
77 TEST_TIMESPEC_NOW_OR_AFTER (CLOCK_REALTIME, ts_timeout);
78
79 xclock_gettime (clockid_for_get, &ts_timeout);
80 ts_timeout.tv_sec += 10;
81 /* Note that the following operation makes ts invalid. */
82 ts_timeout.tv_nsec += 1000000000;
83
84 if (clockid == CLOCK_USE_TIMEDLOCK)
85 TEST_COMPARE (pthread_rwlock_timedrdlock (r, &ts_timeout), EINVAL);
86 else
87 TEST_COMPARE (pthread_rwlock_clockrdlock (r, clockid, &ts_timeout), EINVAL);
88
89 verbose_printf ("2nd child %srdlock done\n", fnname);
90
91 return NULL;
92 }
93
94
95 static int
96 do_test_clock (clockid_t clockid, const char *fnname)
97 {
98 const clockid_t clockid_for_get =
99 (clockid == CLOCK_USE_TIMEDLOCK) ? CLOCK_REALTIME : clockid;
100 size_t cnt;
101 for (cnt = 0; cnt < sizeof (kind) / sizeof (kind[0]); ++cnt)
102 {
103 pthread_rwlock_t r;
104 pthread_rwlockattr_t a;
105
106 if (pthread_rwlockattr_init (&a) != 0)
107 FAIL_EXIT1 ("round %zu: rwlockattr_t failed\n", cnt);
108
109 if (pthread_rwlockattr_setkind_np (&a, kind[cnt]) != 0)
110 FAIL_EXIT1 ("round %zu: rwlockattr_setkind failed\n", cnt);
111
112 if (pthread_rwlock_init (&r, &a) != 0)
113 FAIL_EXIT1 ("round %zu: rwlock_init failed\n", cnt);
114
115 if (pthread_rwlockattr_destroy (&a) != 0)
116 FAIL_EXIT1 ("round %zu: rwlockattr_destroy failed\n", cnt);
117
118 struct timespec ts;
119 xclock_gettime (clockid_for_get, &ts);
120 ++ts.tv_sec;
121
122 /* Get a write lock. */
123 int e = (clockid == CLOCK_USE_TIMEDLOCK)
124 ? pthread_rwlock_timedwrlock (&r, &ts)
125 : pthread_rwlock_clockwrlock (&r, clockid, &ts);
126 if (e != 0)
127 FAIL_EXIT1 ("round %zu: %swrlock failed (%d)\n",
128 cnt, fnname, e);
129
130 verbose_printf ("1st %swrlock done\n", fnname);
131
132 xclock_gettime (clockid_for_get, &ts);
133 ++ts.tv_sec;
134 if (clockid == CLOCK_USE_TIMEDLOCK)
135 TEST_COMPARE (pthread_rwlock_timedrdlock (&r, &ts), EDEADLK);
136 else
137 TEST_COMPARE (pthread_rwlock_clockrdlock (&r, clockid, &ts), EDEADLK);
138
139 verbose_printf ("1st %srdlock done\n", fnname);
140
141 xclock_gettime (clockid_for_get, &ts);
142 ++ts.tv_sec;
143 if (clockid == CLOCK_USE_TIMEDLOCK)
144 TEST_COMPARE (pthread_rwlock_timedwrlock (&r, &ts), EDEADLK);
145 else
146 TEST_COMPARE (pthread_rwlock_clockwrlock (&r, clockid, &ts), EDEADLK);
147
148 verbose_printf ("2nd %swrlock done\n", fnname);
149
150 struct thread_args args;
151 args.rwlock = &r;
152 args.clockid = clockid;
153 args.fnname = fnname;
154 pthread_t th = xpthread_create (NULL, tf, &args);
155
156 puts ("started thread");
157
158 (void) xpthread_join (th);
159
160 puts ("joined thread");
161
162 if (pthread_rwlock_destroy (&r) != 0)
163 FAIL_EXIT1 ("round %zu: rwlock_destroy failed\n", cnt);
164 }
165
166 return 0;
167 }
168
169 static int do_test (void)
170 {
171 do_test_clock (CLOCK_USE_TIMEDLOCK, "timed");
172 do_test_clock (CLOCK_REALTIME, "clock(realtime)");
173 do_test_clock (CLOCK_MONOTONIC, "clock(monotonic)");
174 return 0;
175 }
176
177 #include <support/test-driver.c>