/usr/src/blcr-0.8.2/tests/atomics.c is in blcr-dkms 0.8.2-15ubuntu2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 | /*
* Berkeley Lab Checkpoint/Restart (BLCR) for Linux is Copyright (c)
* 2007, The Regents of the University of California, through Lawrence
* Berkeley National Laboratory (subject to receipt of any required
* approvals from the U.S. Dept. of Energy). All rights reserved.
*
* Portions may be copyrighted by others, as may be noted in specific
* copyright notices within specific files.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* $Id: atomics.c,v 1.3 2008/09/04 01:52:49 phargrov Exp $
*
* Simple serial tests of the atomic operations used inside libcr
*/
#include <stdio.h>
#include "blcr_config.h"
#include "cr_atomic.h"
#define CHECK(cond) \
do { if (!(cond)) { ++failed; printf("Test (" #cond ") FAILED at line %d\n", __LINE__); } } while (0)
int main(int argc, char *argv[])
{
cri_atomic_t X = 0;
int failed = 0;
/* Is the initial value 0? */
CHECK(cri_atomic_read(&X) == 0);
/* Write 1 */
cri_atomic_write(&X, 1);
CHECK(cri_atomic_read(&X) == 1);
/* Increment 1->2 */
cri_atomic_inc(&X);
CHECK(cri_atomic_read(&X) == 2);
/* Decrement 2->1, expecting "false" result */
CHECK(cri_atomic_dec_and_test(&X) == 0);
CHECK(cri_atomic_read(&X) == 1);
/* Decrement 1->0, expecting "true" result */
CHECK(cri_atomic_dec_and_test(&X) != 0);
CHECK(cri_atomic_read(&X) == 0);
/* Compare-and-swap 0->4, expecting "true" result */
CHECK(cri_cmp_swap(&X, 0, 4) != 0);
CHECK(cri_atomic_read(&X) == 4);
/* Try compare-and-swap 0->5 when value is actually 4, expecting "false" result */
CHECK(cri_cmp_swap(&X, 0, 5) == 0);
CHECK(cri_atomic_read(&X) == 4); /* Should *not* have changed */
/* Compare-and-swap 4->5, expecting "true" result */
CHECK(cri_cmp_swap(&X, 4, 5) != 0);
CHECK(cri_atomic_read(&X) == 5);
/* Compare-and-swap 5->5, expecting "true" result */
CHECK(cri_cmp_swap(&X, 5, 5) != 0);
CHECK(cri_atomic_read(&X) == 5);
return !!failed;
}
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