156 lines
3.5 KiB
C
156 lines
3.5 KiB
C
/*
|
|
* 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 2008 Sun Microsystems, Inc. All rights reserved.
|
|
* Use is subject to license terms.
|
|
*
|
|
* Portions Copyright 2006-2008 Message Systems, Inc. All rights reserved.
|
|
*/
|
|
|
|
/* #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 */
|
|
}
|