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/* Copyright 2000-2005 The Apache Software Foundation or its licensors, as
* applicable.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "apr_general.h"
#include "apr_shm.h"
#include "apr_errno.h"
#include "apr_lib.h"
#include "apr_strings.h"
#include <stdio.h>
#include <stdlib.h>
#include <kernel/OS.h>
#include "apr_portable.h"
struct apr_shm_t {
apr_pool_t *pool;
void *memblock;
void *ptr;
apr_size_t reqsize;
apr_size_t avail;
area_id aid;
};
APR_DECLARE(apr_status_t) apr_shm_create(apr_shm_t **m,
apr_size_t reqsize,
const char *filename,
apr_pool_t *p)
{
apr_size_t pagesize;
area_id newid;
char *addr;
char shname[B_OS_NAME_LENGTH];
(*m) = (apr_shm_t *)apr_pcalloc(p, sizeof(apr_shm_t));
/* we MUST allocate in pages, so calculate how big an area we need... */
pagesize = ((reqsize + B_PAGE_SIZE - 1) / B_PAGE_SIZE) * B_PAGE_SIZE;
if (!filename) {
int num = 0;
snprintf(shname, B_OS_NAME_LENGTH, "apr_shmem_%ld", find_thread(NULL));
while (find_area(shname) >= 0)
snprintf(shname, B_OS_NAME_LENGTH, "apr_shmem_%ld_%d",
find_thread(NULL), num++);
}
newid = create_area(filename ? filename : shname,
(void*)&addr, B_ANY_ADDRESS,
pagesize, B_LAZY_LOCK, B_READ_AREA|B_WRITE_AREA);
if (newid < 0)
return errno;
(*m)->pool = p;
(*m)->aid = newid;
(*m)->memblock = addr;
(*m)->ptr = (void*)addr;
(*m)->avail = pagesize; /* record how big an area we actually created... */
(*m)->reqsize = reqsize;
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_shm_destroy(apr_shm_t *m)
{
delete_area(m->aid);
m->avail = 0;
m->memblock = NULL;
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_shm_remove(const char *filename,
apr_pool_t *pool)
{
area_id deleteme = find_area(filename);
if (deleteme == B_NAME_NOT_FOUND)
return APR_EINVAL;
delete_area(deleteme);
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_shm_attach(apr_shm_t **m,
const char *filename,
apr_pool_t *pool)
{
area_info ai;
thread_info ti;
apr_shm_t *new_m;
area_id deleteme = find_area(filename);
if (deleteme == B_NAME_NOT_FOUND)
return APR_EINVAL;
new_m = (apr_shm_t*)apr_palloc(pool, sizeof(apr_shm_t*));
if (new_m == NULL)
return APR_ENOMEM;
new_m->pool = pool;
get_area_info(deleteme, &ai);
get_thread_info(find_thread(NULL), &ti);
if (ti.team != ai.team) {
area_id narea;
narea = clone_area(ai.name, &(ai.address), B_CLONE_ADDRESS,
B_READ_AREA|B_WRITE_AREA, ai.area);
if (narea < B_OK)
return narea;
get_area_info(narea, &ai);
new_m->aid = narea;
new_m->memblock = ai.address;
new_m->ptr = (void*)ai.address;
new_m->avail = ai.size;
new_m->reqsize = ai.size;
}
(*m) = new_m;
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_shm_detach(apr_shm_t *m)
{
delete_area(m->aid);
return APR_SUCCESS;
}
APR_DECLARE(void *) apr_shm_baseaddr_get(const apr_shm_t *m)
{
return m->memblock;
}
APR_DECLARE(apr_size_t) apr_shm_size_get(const apr_shm_t *m)
{
return m->reqsize;
}
APR_POOL_IMPLEMENT_ACCESSOR(shm)
APR_DECLARE(apr_status_t) apr_os_shm_get(apr_os_shm_t *osshm,
apr_shm_t *shm)
{
return APR_ENOTIMPL;
}
APR_DECLARE(apr_status_t) apr_os_shm_put(apr_shm_t **m,
apr_os_shm_t *osshm,
apr_pool_t *pool)
{
return APR_ENOTIMPL;
}
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