tools/tests/libMicro/file_lock.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms
   5  * of the Common Development and Distribution License
   6  * (the "License").  You may not use this file except
   7  * in compliance with the License.
   8  *
   9  * You can obtain a copy of the license at
  10  * src/OPENSOLARIS.LICENSE
  11  * or http://www.opensolaris.org/os/licensing.
  12  * See the License for the specific language governing
  13  * permissions and limitations under the License.
  14  *
  15  * When distributing Covered Code, include this CDDL
  16  * HEADER in each file and include the License file at
  17  * usr/src/OPENSOLARIS.LICENSE.  If applicable,
  18  * add the following below this CDDL HEADER, with the
  19  * fields enclosed by brackets "[]" replaced with your
  20  * own identifying information: Portions Copyright [yyyy]
  21  * [name of copyright owner]
  22  *
  23  * CDDL HEADER END
  24  */
  25
  26 /*
  27  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
  28  * Use is subject to license terms.
  29  */
  30
  31 /*
  32  * test file locking
  33  */
  34
  35 #include <unistd.h>
  36 #include <stdlib.h>
  37 #include <stdio.h>
  38 #include <string.h>
  39 #include <errno.h>
  40 #include <fcntl.h>
  41
  42 #include "libmicro.h"
  43
  44 static int                      file;
  45
  46 int
  47 block(int index)
  48 {
  49         struct flock            fl;
  50
  51         fl.l_type = F_WRLCK;
  52         fl.l_whence = SEEK_SET;
  53         fl.l_start = index;
  54         fl.l_len = 1;
  55         return (fcntl(file, F_SETLKW, &fl) == -1);
  56 }
  57
  58 int
  59 unblock(int index)
  60 {
  61         struct flock            fl;
  62
  63         fl.l_type = F_UNLCK;
  64         fl.l_whence = SEEK_SET;
  65         fl.l_start = index;
  66         fl.l_len = 1;
  67         return (fcntl(file, F_SETLK, &fl) == -1);
  68 }
  69 int
  70 benchmark_init()
  71 {
  72         char                    fname[80];
  73         int     errors = 0;
  74
  75         (void) sprintf(fname, "/private/tmp/oneflock.%ld", getpid());
  76
  77         file = open(fname, O_CREAT | O_TRUNC | O_RDWR, 0600);
  78
  79         if (file == -1) {
  80                 errors++;
  81         }
  82         if (unlink(fname)) {
  83                 errors++;
  84         }
  85
  86         lm_tsdsize = 0;
  87
  88         return (errors);
  89 }
  90
  91 /*ARGSUSED*/
  92 int
  93 benchmark(void *tsd, result_t *res)
  94 {
  95         int                     i;
  96         int                     e = 0;
  97
  98         for (i = 0; i < lm_optB; i ++) {
  99                 e += block(0);
 100                 e += unblock(0);
 101         }
 102         res->re_count = i;
 103         res->re_errors = e;
 104
 105         return (0);
 106 }