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/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000-2002 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Apache" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
* nor may "Apache" appear in their name, without prior written
* permission of the Apache Software Foundation.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
#include "apr.h"
#include "apr_private.h"
#include "apr_general.h"
#include "apr_strings.h"
#include "apr_mmap.h"
#include "apr_errno.h"
#include "fileio.h"
#include "apr_portable.h"
/* System headers required for the mmap library */
#ifdef BEOS
#include <kernel/OS.h>
#endif
#if APR_HAVE_STRING_H
#include <string.h>
#endif
#if APR_HAVE_STDIO_H
#include <stdio.h>
#endif
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#ifdef HAVE_SYS_MMAN_H
#include <sys/mman.h>
#endif
#if APR_HAS_MMAP || defined(BEOS)
static apr_status_t mmap_cleanup(void *themmap)
{
apr_mmap_t *mm = themmap;
int rv;
if (!mm->is_owner) {
return APR_SUCCESS;
}
#ifdef BEOS
rv = delete_area(mm->area);
if (rv == 0) {
mm->mm = (void *)-1;
return APR_SUCCESS;
}
#else
rv = munmap(mm->mm, mm->size);
if (rv == 0) {
mm->mm = (void *)-1;
return APR_SUCCESS;
}
#endif
return errno;
}
APR_DECLARE(apr_status_t) apr_mmap_create(apr_mmap_t **new,
apr_file_t *file, apr_off_t offset,
apr_size_t size, apr_int32_t flag,
apr_pool_t *cont)
{
void *mm;
#ifdef BEOS
area_id aid = -1;
uint32 pages = 0;
#else
apr_int32_t native_flags = 0;
#endif
if (file == NULL || file->filedes == -1 || file->buffered)
return APR_EBADF;
(*new) = (apr_mmap_t *)apr_pcalloc(cont, sizeof(apr_mmap_t));
#ifdef BEOS
/* XXX: mmap shouldn't really change the seek offset */
apr_file_seek(file, APR_SET, &offset);
/* There seems to be some strange interactions that mean our area must
* be set as READ & WRITE or writev will fail! Go figure...
* So we ignore the value in flags and always ask for both READ and WRITE
*/
pages = (size + B_PAGE_SIZE -1) / B_PAGE_SIZE;
aid = create_area("apr_mmap", &mm , B_ANY_ADDRESS, pages * B_PAGE_SIZE,
B_NO_LOCK, B_WRITE_AREA|B_READ_AREA);
if (aid < B_NO_ERROR) {
/* we failed to get an area we can use... */
return APR_ENOMEM;
}
if (aid >= B_NO_ERROR)
read(file->filedes, mm, size);
(*new)->area = aid;
#else
if (flag & APR_MMAP_WRITE) {
native_flags |= PROT_WRITE;
}
if (flag & APR_MMAP_READ) {
native_flags |= PROT_READ;
}
mm = mmap(NULL, size, native_flags, MAP_SHARED, file->filedes, offset);
if (mm == (void *)-1) {
/* we failed to get an mmap'd file... */
return APR_ENOMEM;
}
#endif
(*new)->mm = mm;
(*new)->size = size;
(*new)->cntxt = cont;
(*new)->is_owner = 1;
/* register the cleanup... */
apr_pool_cleanup_register((*new)->cntxt, (void*)(*new), mmap_cleanup,
apr_pool_cleanup_null);
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_mmap_dup(apr_mmap_t **new_mmap,
apr_mmap_t *old_mmap,
apr_pool_t *p,
int transfer_ownership)
{
*new_mmap = (apr_mmap_t *)apr_pmemdup(p, old_mmap, sizeof(apr_mmap_t));
(*new_mmap)->cntxt = p;
/* The old_mmap can transfer ownership only if the old_mmap itself
* is an owner of the mmap'ed segment.
*/
if (old_mmap->is_owner) {
if (transfer_ownership) {
(*new_mmap)->is_owner = 1;
old_mmap->is_owner = 0;
apr_pool_cleanup_kill(old_mmap->cntxt, old_mmap, mmap_cleanup);
}
else {
(*new_mmap)->is_owner = 0;
}
apr_pool_cleanup_register(p, *new_mmap, mmap_cleanup,
apr_pool_cleanup_null);
}
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_mmap_delete(apr_mmap_t *mm)
{
apr_status_t rv;
if (mm->mm == (void *)-1)
return APR_ENOENT;
if ((rv = mmap_cleanup(mm)) == APR_SUCCESS) {
apr_pool_cleanup_kill(mm->cntxt, mm, mmap_cleanup);
return APR_SUCCESS;
}
return rv;
}
#endif
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