1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 /*
28 * Initialization routines for the library version of libumem.
29 */
30
31 #include "umem_base.h"
32 #include "vmem_base.h"
33 #include <unistd.h>
34 #include <dlfcn.h>
35
36 void
vmem_heap_init(void)37 vmem_heap_init(void)
38 {
39 void *handle = dlopen("libmapmalloc.so.1", RTLD_NOLOAD);
40
41 if (handle != NULL) {
42 log_message("sbrk backend disabled\n");
43 vmem_backend = VMEM_BACKEND_MMAP;
44 }
45
46 if ((vmem_backend & VMEM_BACKEND_MMAP) != 0) {
47 vmem_backend = VMEM_BACKEND_MMAP;
48 (void) vmem_mmap_arena(NULL, NULL);
49 } else {
50 vmem_backend = VMEM_BACKEND_SBRK;
51 (void) vmem_sbrk_arena(NULL, NULL);
52 }
53 }
54
55 /*ARGSUSED*/
56 void
umem_type_init(caddr_t start,size_t len,size_t pgsize)57 umem_type_init(caddr_t start, size_t len, size_t pgsize)
58 {
59 pagesize = _sysconf(_SC_PAGESIZE);
60 }
61
62 int
umem_get_max_ncpus(void)63 umem_get_max_ncpus(void)
64 {
65 if (thr_main() != -1)
66 return (2 * sysconf(_SC_NPROCESSORS_ONLN));
67 else
68 return (1);
69 }
70