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/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 "apr_portable.h"
struct apr_shm_t {
apr_pool_t *pool;
void *memblock;
};
APR_DECLARE(apr_status_t) apr_shm_create(apr_shm_t **m,
apr_size_t reqsize,
const char *filename,
apr_pool_t *pool)
{
int rc;
apr_shm_t *newm = (apr_shm_t *)apr_palloc(pool, sizeof(apr_shm_t));
char *name = NULL;
ULONG flags = PAG_COMMIT|PAG_READ|PAG_WRITE;
newm->pool = pool;
if (filename) {
name = apr_pstrcat(pool, "\\SHAREMEM\\", filename, NULL);
}
if (name == NULL) {
flags |= OBJ_GETTABLE;
}
rc = DosAllocSharedMem(&(newm->memblock), name, reqsize, flags);
if (rc) {
return APR_OS2_STATUS(rc);
}
*m = newm;
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_shm_create_ex(apr_shm_t **m,
apr_size_t reqsize,
const char *filename,
apr_pool_t *p,
apr_int32_t flags)
{
return apr_shm_create(m, reqsize, filename, p);
}
APR_DECLARE(apr_status_t) apr_shm_destroy(apr_shm_t *m)
{
DosFreeMem(m->memblock);
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_shm_remove(const char *filename,
apr_pool_t *pool)
{
return APR_ENOTIMPL;
}
APR_DECLARE(apr_status_t) apr_shm_delete(apr_shm_t *m)
{
return APR_ENOTIMPL;
}
APR_DECLARE(apr_status_t) apr_shm_attach(apr_shm_t **m,
const char *filename,
apr_pool_t *pool)
{
int rc;
apr_shm_t *newm = (apr_shm_t *)apr_palloc(pool, sizeof(apr_shm_t));
char *name = NULL;
ULONG flags = PAG_READ|PAG_WRITE;
newm->pool = pool;
name = apr_pstrcat(pool, "\\SHAREMEM\\", filename, NULL);
rc = DosGetNamedSharedMem(&(newm->memblock), name, flags);
if (rc) {
return APR_FROM_OS_ERROR(rc);
}
*m = newm;
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_shm_attach_ex(apr_shm_t **m,
const char *filename,
apr_pool_t *pool,
apr_int32_t flags)
{
return apr_shm_attach(m, filename, pool);
}
APR_DECLARE(apr_status_t) apr_shm_detach(apr_shm_t *m)
{
int rc = 0;
if (m->memblock) {
rc = DosFreeMem(m->memblock);
}
return APR_FROM_OS_ERROR(rc);
}
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)
{
ULONG flags, size = 0x1000000;
DosQueryMem(m->memblock, &size, &flags);
return size;
}
APR_PERMS_SET_ENOTIMPL(shm)
APR_POOL_IMPLEMENT_ACCESSOR(shm)
APR_DECLARE(apr_status_t) apr_os_shm_get(apr_os_shm_t *osshm,
apr_shm_t *shm)
{
*osshm = shm->memblock;
return APR_SUCCESS;
}
APR_DECLARE(apr_status_t) apr_os_shm_put(apr_shm_t **m,
apr_os_shm_t *osshm,
apr_pool_t *pool)
{
int rc;
apr_shm_t *newm = (apr_shm_t *)apr_palloc(pool, sizeof(apr_shm_t));
ULONG flags = PAG_COMMIT|PAG_READ|PAG_WRITE;
newm->pool = pool;
rc = DosGetSharedMem(&(newm->memblock), flags);
if (rc) {
return APR_FROM_OS_ERROR(rc);
}
*m = newm;
return APR_SUCCESS;
}
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