bin/tests/mempool_test.c

/*
 * Copyright (C) 2004, 2007  Internet Systems Consortium, Inc. ("ISC")
 * Copyright (C) 1999-2001  Internet Software Consortium.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */

/* $Id: mempool_test.c,v 1.17 2007/06/19 23:46:59 tbox Exp $ */

#include <config.h>

#include <isc/mem.h>
#include <isc/util.h>

isc_mem_t *mctx;

int
main(int argc, char *argv[]) {
    void *items1[50];
    void *items2[50];
    void *tmp;
    isc_mempool_t *mp1, *mp2;
    unsigned int i, j;
    isc_mutex_t lock;

    UNUSED(argc);
    UNUSED(argv);

    isc_mem_debugging = ISC_MEM_DEBUGRECORD;

    RUNTIME_CHECK(isc_mutex_init(&lock) == ISC_R_SUCCESS);

    mctx = NULL;
    RUNTIME_CHECK(isc_mem_create(0, 0, &mctx) == ISC_R_SUCCESS);

    mp1 = NULL;
    RUNTIME_CHECK(isc_mempool_create(mctx, 24, &mp1) == ISC_R_SUCCESS);

    mp2 = NULL;
    RUNTIME_CHECK(isc_mempool_create(mctx, 31, &mp2) == ISC_R_SUCCESS);

    isc_mempool_associatelock(mp1, &lock);
    isc_mempool_associatelock(mp2, &lock);

    isc_mem_stats(mctx, stderr);

    isc_mempool_setfreemax(mp1, 10);
    isc_mempool_setfillcount(mp1, 10);
    isc_mempool_setmaxalloc(mp1, 30);

    /*
     * Allocate 30 items from the pool.  This is our max.
     */
    for (i = 0; i < 30; i++) {
        items1[i] = isc_mempool_get(mp1);
        RUNTIME_CHECK(items1[i] != NULL);
    }

    /*
     * Try to allocate one more.  This should fail.
     */
    tmp = isc_mempool_get(mp1);
    RUNTIME_CHECK(tmp == NULL);

    /*
     * Free the first 11 items.  Verify that there are 10 free items on
     * the free list (which is our max).
     */

    for (i = 0; i < 11; i++) {
        isc_mempool_put(mp1, items1[i]);
        items1[i] = NULL;
    }

    RUNTIME_CHECK(isc_mempool_getfreecount(mp1) == 10);
    RUNTIME_CHECK(isc_mempool_getallocated(mp1) == 19);

    isc_mem_stats(mctx, stderr);

    /*
     * Now, beat up on mp2 for a while.  Allocate 50 items, then free
     * them, then allocate 50 more, etc.
     */
    isc_mempool_setfreemax(mp2, 25);
    isc_mempool_setfillcount(mp2, 25);
    for (j = 0; j < 5000; j++) {
        for (i = 0; i < 50; i++) {
            items2[i] = isc_mempool_get(mp2);
            RUNTIME_CHECK(items2[i] != NULL);
        }
        for (i = 0; i < 50; i++) {
            isc_mempool_put(mp2, items2[i]);
            items2[i] = NULL;
        }
    }

    /*
     * Free all the other items and blow away this pool.
     */
    for (i = 11; i < 30; i++) {
        isc_mempool_put(mp1, items1[i]);
        items1[i] = NULL;
    }

    isc_mempool_destroy(&mp1);

    isc_mem_stats(mctx, stderr);

    isc_mempool_destroy(&mp2);

    isc_mem_stats(mctx, stderr);

    isc_mem_destroy(&mctx);

    DESTROYLOCK(&lock);

    return (0);
}