1 /*
2 * Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #ifdef HAVE_CONFIG_H
29 # include "config.h"
30 #endif
31
32 #include <errno.h>
33 #include <stdio.h>
34 #include <unistd.h>
35 #include <sys/syscall.h>
36
37 int
main(void)38 main(void)
39 {
40 #ifdef __NR_membarrier
41 if (syscall(__NR_membarrier, 3, 255) != -1)
42 return 77;
43 printf("membarrier(0x3 /* MEMBARRIER_CMD_??? */, 255) = -1 %s\n",
44 errno == ENOSYS ?
45 "ENOSYS (Function not implemented)" :
46 "EINVAL (Invalid argument)");
47 if (errno != ENOSYS) {
48 if (syscall(__NR_membarrier, 0, 0) != 1)
49 return 1; /* the test needs to be updated? */
50 puts("membarrier(MEMBARRIER_CMD_QUERY, 0)"
51 " = 0x1 (MEMBARRIER_CMD_SHARED)");
52 }
53 puts("+++ exited with 0 +++");
54 return 0;
55 #else
56 return 77;
57 #endif
58 }
59