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b910f788 | 1 | /* Copyright (C) 2002, 2003 Free Software Foundation, Inc. |
76a50749 UD |
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, write to the Free | |
17 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
18 | 02111-1307 USA. */ | |
19 | ||
20 | #include <errno.h> | |
21 | #include <pthread.h> | |
22 | #include <stdint.h> | |
23 | #include <stdio.h> | |
24 | #include <stdlib.h> | |
25 | #include <string.h> | |
26 | #include <unistd.h> | |
27 | #include <sys/mman.h> | |
28 | #include <sys/wait.h> | |
29 | ||
30 | ||
b910f788 RM |
31 | static int |
32 | do_test (void) | |
76a50749 | 33 | { |
b910f788 RM |
34 | #if ! _POSIX_THREAD_PROCESS_SHARED |
35 | ||
36 | puts ("_POSIX_THREAD_PROCESS_SHARED not supported, test skipped"); | |
37 | ||
38 | #else | |
39 | ||
76a50749 UD |
40 | size_t ps = sysconf (_SC_PAGESIZE); |
41 | char tmpfname[] = "/tmp/tst-spin2.XXXXXX"; | |
42 | char data[ps]; | |
43 | void *mem; | |
44 | int fd; | |
45 | pthread_spinlock_t *s; | |
46 | pid_t pid; | |
47 | char *p; | |
48 | int err; | |
49 | ||
50 | fd = mkstemp (tmpfname); | |
51 | if (fd == -1) | |
52 | { | |
53 | printf ("cannot open temporary file: %m\n"); | |
b910f788 | 54 | return 1; |
76a50749 UD |
55 | } |
56 | ||
57 | /* Make sure it is always removed. */ | |
58 | unlink (tmpfname); | |
59 | ||
60 | /* Create one page of data. */ | |
61 | memset (data, '\0', ps); | |
62 | ||
63 | /* Write the data to the file. */ | |
64 | if (write (fd, data, ps) != ps) | |
65 | { | |
66 | puts ("short write"); | |
b910f788 | 67 | return 1; |
76a50749 UD |
68 | } |
69 | ||
70 | mem = mmap (NULL, ps, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); | |
71 | if (mem == MAP_FAILED) | |
72 | { | |
73 | printf ("mmap failed: %m\n"); | |
b910f788 | 74 | return 1; |
76a50749 UD |
75 | } |
76 | ||
77 | s = (pthread_spinlock_t *) (((uintptr_t) mem | |
78 | + __alignof (pthread_spinlock_t)) | |
79 | & ~(__alignof (pthread_spinlock_t) - 1)); | |
80 | p = (char *) (s + 1); | |
81 | ||
82 | if (pthread_spin_init (s, PTHREAD_PROCESS_SHARED) != 0) | |
83 | { | |
84 | puts ("spin_init failed"); | |
b910f788 | 85 | return 1; |
76a50749 UD |
86 | } |
87 | ||
88 | if (pthread_spin_lock (s) != 0) | |
89 | { | |
90 | puts ("spin_lock failed"); | |
b910f788 | 91 | return 1; |
76a50749 UD |
92 | } |
93 | ||
94 | err = pthread_spin_trylock (s); | |
95 | if (err == 0) | |
96 | { | |
f78deea6 | 97 | puts ("1st spin_trylock succeeded"); |
b910f788 | 98 | return 1; |
76a50749 UD |
99 | } |
100 | else if (err != EBUSY) | |
101 | { | |
f78deea6 | 102 | puts ("1st spin_trylock didn't return EBUSY"); |
b910f788 | 103 | return 1; |
f78deea6 UD |
104 | } |
105 | ||
106 | err = pthread_spin_unlock (s); | |
107 | if (err != 0) | |
108 | { | |
109 | puts ("parent: spin_unlock failed"); | |
b910f788 | 110 | return 1; |
f78deea6 UD |
111 | } |
112 | ||
113 | err = pthread_spin_trylock (s); | |
114 | if (err != 0) | |
115 | { | |
116 | puts ("2nd spin_trylock failed"); | |
b910f788 | 117 | return 1; |
76a50749 UD |
118 | } |
119 | ||
120 | *p = 0; | |
121 | ||
122 | puts ("going to fork now"); | |
123 | pid = fork (); | |
124 | if (pid == -1) | |
125 | { | |
126 | puts ("fork failed"); | |
b910f788 | 127 | return 1; |
76a50749 UD |
128 | } |
129 | else if (pid == 0) | |
130 | { | |
131 | /* Play some lock ping-pong. It's our turn to unlock first. */ | |
132 | if ((*p)++ != 0) | |
133 | { | |
134 | puts ("child: *p != 0"); | |
b910f788 | 135 | return 1; |
76a50749 UD |
136 | } |
137 | ||
138 | if (pthread_spin_unlock (s) != 0) | |
139 | { | |
140 | puts ("child: 1st spin_unlock failed"); | |
b910f788 | 141 | return 1; |
76a50749 UD |
142 | } |
143 | ||
144 | puts ("child done"); | |
145 | } | |
146 | else | |
147 | { | |
148 | if (pthread_spin_lock (s) != 0) | |
149 | { | |
150 | puts ("parent: 2nd spin_lock failed"); | |
b910f788 | 151 | return 1; |
76a50749 UD |
152 | } |
153 | ||
154 | puts ("waiting for child"); | |
155 | ||
156 | waitpid (pid, NULL, 0); | |
157 | ||
158 | puts ("parent done"); | |
159 | } | |
b910f788 | 160 | #endif |
76a50749 | 161 | |
b910f788 | 162 | return 0; |
76a50749 | 163 | } |
b910f788 RM |
164 | |
165 | #define TEST_FUNCTION do_test () | |
166 | #include "../test-skeleton.c" |