| /* ==================================================================== |
| * The Apache Software License, Version 1.1 |
| * |
| * Copyright (c) 2000-2003 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_buckets.h" |
| |
| #if APR_HAS_MMAP |
| |
| static apr_status_t mmap_bucket_read(apr_bucket *b, const char **str, |
| apr_size_t *length, apr_read_type_e block) |
| { |
| apr_bucket_mmap *m = b->data; |
| apr_status_t ok; |
| void *addr; |
| |
| if (!m->mmap) { |
| /* the apr_mmap_t was already cleaned up out from under us */ |
| return APR_EINVAL; |
| } |
| |
| ok = apr_mmap_offset(&addr, m->mmap, b->start); |
| if (ok != APR_SUCCESS) { |
| return ok; |
| } |
| *str = addr; |
| *length = b->length; |
| return APR_SUCCESS; |
| } |
| |
| static apr_status_t mmap_bucket_cleanup(void *data) |
| { |
| /* the apr_mmap_t is about to disappear out from under us, so we |
| * have no choice but to pretend it doesn't exist anymore. the |
| * refcount is now useless because there's nothing to refer to |
| * anymore. so the only valid action on any remaining referrer |
| * is to delete it. no more reads, no more anything. */ |
| apr_bucket_mmap *m = data; |
| |
| m->mmap = NULL; |
| return APR_SUCCESS; |
| } |
| |
| static void mmap_bucket_destroy(void *data) |
| { |
| apr_bucket_mmap *m = data; |
| |
| if (apr_bucket_shared_destroy(m)) { |
| if (m->mmap) { |
| apr_pool_cleanup_kill(m->mmap->cntxt, m, mmap_bucket_cleanup); |
| apr_mmap_delete(m->mmap); |
| } |
| apr_bucket_free(m); |
| } |
| } |
| |
| /* |
| * XXX: are the start and length arguments useful? |
| */ |
| APU_DECLARE(apr_bucket *) apr_bucket_mmap_make(apr_bucket *b, apr_mmap_t *mm, |
| apr_off_t start, |
| apr_size_t length) |
| { |
| apr_bucket_mmap *m; |
| |
| m = apr_bucket_alloc(sizeof(*m), b->list); |
| m->mmap = mm; |
| |
| apr_pool_cleanup_register(mm->cntxt, m, mmap_bucket_cleanup, |
| apr_pool_cleanup_null); |
| |
| b = apr_bucket_shared_make(b, m, start, length); |
| b->type = &apr_bucket_type_mmap; |
| |
| return b; |
| } |
| |
| |
| APU_DECLARE(apr_bucket *) apr_bucket_mmap_create(apr_mmap_t *mm, |
| apr_off_t start, |
| apr_size_t length, |
| apr_bucket_alloc_t *list) |
| { |
| apr_bucket *b = apr_bucket_alloc(sizeof(*b), list); |
| |
| APR_BUCKET_INIT(b); |
| b->free = apr_bucket_free; |
| b->list = list; |
| return apr_bucket_mmap_make(b, mm, start, length); |
| } |
| |
| static apr_status_t mmap_bucket_setaside(apr_bucket *b, apr_pool_t *p) |
| { |
| apr_bucket_mmap *m = b->data; |
| apr_mmap_t *mm = m->mmap; |
| apr_mmap_t *new_mm; |
| apr_status_t ok; |
| |
| if (!mm) { |
| /* the apr_mmap_t was already cleaned up out from under us */ |
| return APR_EINVAL; |
| } |
| |
| /* shortcut if possible */ |
| if (apr_pool_is_ancestor(mm->cntxt, p)) { |
| return APR_SUCCESS; |
| } |
| |
| /* duplicate apr_mmap_t into new pool */ |
| /* XXX: the transfer_ownership flag on this call |
| * will go away soon.. it's ignored right now. */ |
| ok = apr_mmap_dup(&new_mm, mm, p, 1); |
| if (ok != APR_SUCCESS) { |
| return ok; |
| } |
| |
| /* decrement refcount on old apr_bucket_mmap */ |
| mmap_bucket_destroy(m); |
| |
| /* create new apr_bucket_mmap pointing to new apr_mmap_t */ |
| apr_bucket_mmap_make(b, new_mm, b->start, b->length); |
| |
| return APR_SUCCESS; |
| } |
| |
| APU_DECLARE_DATA const apr_bucket_type_t apr_bucket_type_mmap = { |
| "MMAP", 5, APR_BUCKET_DATA, |
| mmap_bucket_destroy, |
| mmap_bucket_read, |
| mmap_bucket_setaside, |
| apr_bucket_shared_split, |
| apr_bucket_shared_copy |
| }; |
| |
| #endif |
