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/*
* 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.
*/
/*
* Portions Copyright 2006-2008 Message Systems, Inc.
*/
/* #pragma ident "@(#)init_lib.c 1.2 05/06/08 SMI" */
/*
* Initialization routines for the library version of libumem.
*/
#include "config.h"
#include "umem_base.h"
#include "vmem_base.h"
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#if HAVE_DLFCN_H
#include <dlfcn.h>
#endif
#include <fcntl.h>
#include <string.h>
#ifdef __FreeBSD__
#include <machine/param.h>
#endif
void
vmem_heap_init(void)
{
#ifdef _WIN32
vmem_backend = VMEM_BACKEND_MMAP;
(void) vmem_sbrk_arena(NULL, NULL);
#else
# if defined(sun)
void *handle = dlopen("libmapmalloc.so.1", RTLD_NOLOAD);
if (handle != NULL) {
log_message("sbrk backend disabled\n");
vmem_backend = VMEM_BACKEND_MMAP;
}
# else
if (vmem_backend == 0) {
/* prefer mmap, as sbrk() seems to have problems wither working
* with other allocators or has some Solaris specific assumptions. */
vmem_backend = VMEM_BACKEND_MMAP;
}
# endif
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);
}
#endif
}
/*ARGSUSED*/
void
umem_type_init(caddr_t start, size_t len, size_t pgsize)
{
#ifdef _WIN32
SYSTEM_INFO info;
GetSystemInfo(&info);
pagesize = info.dwPageSize;
#elif !defined(__FreeBSD__)
pagesize = _sysconf(_SC_PAGESIZE);
#else
pagesize = PAGE_SIZE;
#endif
}
int
umem_get_max_ncpus(void)
{
#ifdef linux
/*
* HACK: sysconf() will invoke malloc() on Linux as part of reading
* in /proc/stat. To avoid recursion in the malloc replacement
* version of libumem, read /proc/stat into a static buffer.
*/
static int ncpus = 0;
if (ncpus == 0) {
char proc_stat[8192];
int fd;
ncpus = 1;
fd = open("/proc/stat", O_RDONLY);
if (fd >= 0) {
const ssize_t n = read(fd, proc_stat, sizeof(proc_stat) - 1);
if (n >= 0) {
const char *cur;
const char *next;
proc_stat[n] = '\0';
cur = proc_stat;
while (*cur && (next = strstr(cur + 3, "cpu"))) {
cur = next;
}
if (*cur)
ncpus = atoi(cur + 3) + 1;
}
close(fd);
}
}
return ncpus;
#else /* !linux */
#if _SC_NPROCESSORS_ONLN
return (2 * sysconf(_SC_NPROCESSORS_ONLN));
#elif defined(_SC_NPROCESSORS_CONF)
return (2 * sysconf(_SC_NPROCESSORS_CONF));
#elif defined(_WIN32)
SYSTEM_INFO info;
GetSystemInfo(&info);
return info.dwNumberOfProcessors;
#else
/* XXX: determine CPU count on other platforms */
return (1);
#endif
#endif /* linux */
}
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