libumem/common/init_lib.c

	init_lib.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

/*
 * Initialization routines for the library version of libumem.
 */

#include "umem_base.h"
#include "vmem_base.h"

#include <unistd.h>
#include <dlfcn.h>

void
vmem_heap_init(void)
{
    void *handle = dlopen("libmapmalloc.so.1", RTLD_NOLOAD);

    if (handle != NULL) {
        log_message("sbrk backend disabled\n");
        vmem_backend = VMEM_BACKEND_MMAP;
    }

    if ((vmem_backend & VMEM_BACKEND_MMAP) != 0) {
        vmem_backend = VMEM_BACKEND_MMAP;
        (void) vmem_mmap_arena(NULL, NULL);
    } else {
        vmem_backend = VMEM_BACKEND_SBRK;
        (void) vmem_sbrk_arena(NULL, NULL);
    }
}

/*ARGSUSED*/
void
umem_type_init(caddr_t start, size_t len, size_t pgsize)
{
    pagesize = _sysconf(_SC_PAGESIZE);
}

int
umem_get_max_ncpus(void)
{
    if (thr_main() != -1)
        return (2 * sysconf(_SC_NPROCESSORS_ONLN));
    else
        return (1);
}