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/*
*
* Copyright (c) 2018 Huawei Technologies Co.,Ltd.
* 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 <sys/types.h>
#include <unistd.h>
#include "dmm_config.h"
#include "dmm_memory.h"
#include "dmm_group.h"
#define DMM_MEGABYTE (1024 * 1024)
/* shared from main process */
static struct dmm_share *main_share = NULL;
struct dmm_segment *main_seg = NULL;
/* shared by process tree */
static struct dmm_share base_share = { 0 };
struct dmm_segment *base_seg = NULL;
int
dmm_mem_main_init ()
{
int ret;
ret = dmm_group_create_main ();
if (ret)
{
return -1;
}
main_share = &main_group->share;
main_share->type = DMM_MAIN_SHARE_TYPE;
main_share->size = DMM_MAIN_SHARE_SIZE * DMM_MEGABYTE;
main_share->base = NULL;
main_share->pid = getpid ();
ret = dmm_share_create (main_share);
if (ret)
{
return -1;
}
main_seg = dmm_seg_create (main_share->base, main_share->size);
if (!main_seg)
{
return -1;
}
dmm_group_active ();
return 0;
}
int
dmm_mem_main_exit ()
{
dmm_group_delete_main ();
return 0;
}
int
dmm_mem_app_init ()
{
int ret;
ret = dmm_group_attach_main ();
if (0 == ret)
{
main_share = &main_group->share;
ret = dmm_share_attach (main_share);
if (ret)
{
return -1;
}
main_seg = dmm_seg_attach (main_share->base, main_share->size);
if (!main_seg)
{
return -1;
}
/* now share main process share-memory */
base_seg = main_seg;
}
else
{
base_share.type = DMM_SHARE_TYPE;
base_share.size = DMM_SHARE_SIZE * DMM_MEGABYTE;
base_share.base = NULL;
base_share.pid = getpid ();
ret = dmm_share_create (&base_share);
if (ret)
{
return -1;
}
base_seg = dmm_seg_create (base_share.base, base_share.size);
if (!base_seg)
{
return -1;
}
}
return 0;
}
int
dmm_mem_app_exit ()
{
dmm_group_detach_main ();
if (base_share.base)
dmm_share_delete (&base_share);
base_share.base = NULL;
base_seg = NULL;
main_seg = NULL;
return 0;
}
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