source: mainline/test/mm/slab2/test.c@ 4a5b2b0e

/*
 * Copyright (C) 2006 Ondrej Palkovsky
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <test.h>
#include <mm/slab.h>
#include <print.h>
#include <proc/thread.h>
#include <arch.h>
#include <panic.h>
#include <mm/frame.h>

#define ITEM_SIZE 256

/** Fill memory with 2 caches, when allocation fails,
 *  free one of the caches. We should have everything in magazines,
 *  now allocation should clean magazines and allow for full allocation.
 */
static void totalmemtest(void)
{
        slab_cache_t *cache1;
        slab_cache_t *cache2;
        int i;

        void *data1, *data2;
        void *olddata1=NULL, *olddata2=NULL;
        
        cache1 = slab_cache_create("cache1_tst", ITEM_SIZE, 0, NULL, NULL, 0);
        cache2 = slab_cache_create("cache2_tst", ITEM_SIZE, 0, NULL, NULL, 0);

        printf("Allocating...");
        /* Use atomic alloc, so that we find end of memory */
        do {
                data1 = slab_alloc(cache1, FRAME_ATOMIC);
                data2 = slab_alloc(cache2, FRAME_ATOMIC);
                if (!data1 || !data2) {
                        if (data1)
                                slab_free(cache1,data1);
                        if (data2)
                                slab_free(cache2,data2);
                        break;
                }

                *((void **)data1) = olddata1;
                *((void **)data2) = olddata2;
                olddata1 = data1;
                olddata2 = data2;
        }while(1);
        printf("done.\n");
        slab_print_list();
        /* We do not have memory - now deallocate cache2 */
        printf("Deallocating cache2...");
        while (olddata2) {
                data2 = *((void **)olddata2);
                slab_free(cache2, olddata2);
                olddata2 = data2;
        }
        printf("done.\n");

        slab_print_list();
        printf("Allocating to cache1...\n");
        for (i=0; i<30; i++) {
                data1 = slab_alloc(cache1, FRAME_ATOMIC);
                if (!data1) {
                        panic("Incorrect memory size - use another test.");
                }
                *((void **)data1) = olddata1;
                olddata1 = data1;
        }
        slab_print_list();
        while (1) {
                data1 = slab_alloc(cache1, FRAME_ATOMIC);
                if (!data1) {
                        break;
                }
                *((void **)data1) = olddata1;
                olddata1 = data1;
        }
        slab_print_list();
        
}

void test(void)
{
        totalmemtest();
}