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/* ====================================================================
* The Apache Software License, Version 1.1
*
* Copyright (c) 2000 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 "mm.h"
#include "apr_general.h"
#include "apr_shmem.h"
#include "apr_errno.h"
#if BEOS
#include <kernel/OS.h>
#endif
struct shmem_t {
MM *mm;
#if BEOS
area_id id;
#endif
};
apr_status_t apr_shm_init(struct shmem_t **m, apr_size_t reqsize, const char *file, apr_pool_t *cont)
{
MM *newmm = mm_create(reqsize + sizeof(**m), file, MM_ALLOCATE_ENOUGH);
if (newmm == NULL) {
return errno;
}
(*m) = mm_malloc(newmm, sizeof(struct shmem_t));
(*m)->mm = newmm;
#if BEOS
(*m)->id = area_for((*m));
#endif
return APR_SUCCESS;
}
apr_status_t apr_shm_destroy(struct shmem_t *m)
{
mm_destroy(m->mm);
return APR_SUCCESS;
}
void *apr_shm_malloc(struct shmem_t *c, apr_size_t reqsize)
{
if (c->mm == NULL) {
return NULL;
}
return mm_malloc(c->mm, reqsize);
}
void *apr_shm_calloc(struct shmem_t *shared, apr_size_t size)
{
if (shared == NULL) {
return NULL;
}
return mm_calloc(shared->mm, 1, size);
}
apr_status_t apr_shm_free(struct shmem_t *shared, void *entity)
{
mm_free(shared->mm, entity);
return APR_SUCCESS;
}
apr_status_t apr_shm_name_get(apr_shmem_t *c, apr_shm_name_t **name)
{
#if APR_USES_ANONYMOUS_SHM
*name = NULL;
return APR_ANONYMOUS;
/* Currently, we are not supporting name based shared memory on Unix
* systems. This may change in the future however, so I will leave
* this in here for now. Plus, this gives other platforms a good idea
* of how to proceed.
*/
#elif APR_USES_FILEBASED_SHM
#elif APR_USES_KEYBASED_SHM
#endif
}
apr_status_t apr_shm_name_set(apr_shmem_t *c, apr_shm_name_t *name)
{
#if APR_USES_ANONYMOUS_SHM
return APR_ANONYMOUS;
/* Currently, we are not supporting name based shared memory on Unix
* systems. This may change in the future however, so I will leave
* this in here for now. Plus, this gives other platforms a good idea
* of how to proceed.
*/
#elif APR_USES_FILEBASED_SHM
#elif APR_USES_KEYBASED_SHM
#endif
}
apr_status_t apr_shm_open(struct shmem_t *c)
{
#if APR_USES_ANONYMOUS_SHM
#if BEOS
/* If we've forked we need a clone of the original area or we
* will only have access to a one time copy of the data made when
* the fork occurred. This strange bit of code fixes that problem!
*/
thread_info ti;
area_info ai;
area_id deleteme = area_for(c);
/* we need to check which team we're in, so we need to get
* the appropriate info structures for the current thread and
* the area we're using.
*/
get_area_info(c->id, &ai);
get_thread_info(find_thread(NULL), &ti);
if (ti.team != ai.team){
area_id nai;
/* if we are in a child then we need to delete the system
* created area as it's a one time copy and won't be a clone
* which is not good.
*/
delete_area(deleteme);
/* now we make our own clone and use that from now on! */
nai = clone_area(ai.name, &(ai.address), B_CLONE_ADDRESS,
B_READ_AREA | B_WRITE_AREA, ai.area);
get_area_info(nai, &ai);
c = ai.address;
}
#endif
/* When using MM, we don't need to open shared memory segments in child
* segments, so just return immediately.
*/
return APR_SUCCESS;
/* Currently, we are not supporting name based shared memory on Unix
* systems. This may change in the future however, so I will leave
* this in here for now. Plus, this gives other platforms a good idea
* of how to proceed.
*/
#elif APR_USES_FILEBASED_SHM
#elif APR_USES_KEYBASED_SHM
#endif
}
apr_status_t apr_shm_avail(struct shmem_t *c, apr_size_t *size)
{
*size = mm_available(c);
if (*size == 0) {
return APR_ENOSHMAVAIL;
}
return APR_SUCCESS;
}
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