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/*
* Copyright (c) 2014 Nicira, Inc.
*
* 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 <config.h>
#include "id-pool.h"
#include "ovs-thread.h"
#include "ofproto-dpif-rid.h"
struct recirc_id_pool {
struct ovs_mutex lock;
struct id_pool *rids;
};
#define RECIRC_ID_BASE 300
#define RECIRC_ID_N_IDS 1024
struct recirc_id_pool *
recirc_id_pool_create(void)
{
struct recirc_id_pool *pool;
pool = xmalloc(sizeof *pool);
pool->rids = id_pool_create(RECIRC_ID_BASE, RECIRC_ID_N_IDS);
ovs_mutex_init(&pool->lock);
return pool;
}
void
recirc_id_pool_destroy(struct recirc_id_pool *pool)
{
id_pool_destroy(pool->rids);
ovs_mutex_destroy(&pool->lock);
free(pool);
}
uint32_t
recirc_id_alloc(struct recirc_id_pool *pool)
{
uint32_t id;
bool ret;
ovs_mutex_lock(&pool->lock);
ret = id_pool_alloc_id(pool->rids, &id);
ovs_mutex_unlock(&pool->lock);
if (!ret) {
return 0;
}
return id;
}
void
recirc_id_free(struct recirc_id_pool *pool, uint32_t id)
{
ovs_mutex_lock(&pool->lock);
id_pool_free_id(pool->rids, id);
ovs_mutex_unlock(&pool->lock);
}
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