1 /* 2 * Copyright (c) 2015 Dmitry V. Levin <ldv (at) 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 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
