/* 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.

 */

#ifndef __mod_h2__h2_workers__

#define __mod_h2__h2_workers__

/* Thread pool specific to executing h2_tasks. Has a minimum and maximum 

 * number of workers it creates. Starts with minimum workers and adds

 * some on load, reduces the number again when idle.

 *

 */

struct apr_thread_mutex_t;

struct apr_thread_cond_t;

struct h2_mplx;

struct h2_request;

struct h2_task;

struct h2_fifo;

struct h2_slot;

typedef struct h2_workers h2_workers;

struct h2_workers {

    server_rec *s;

    apr_pool_t *pool;

    int next_worker_id;

    int min_workers;

    int max_workers;

    int max_idle_secs;

    int aborted;

    int dynamic;

    apr_threadattr_t *thread_attr;

    int nslots;

    struct h2_slot *slots;

    volatile apr_uint32_t worker_count;

    struct h2_slot *free;

    struct h2_slot *idle;

    struct h2_slot *zombies;

    struct h2_fifo *mplxs;

    struct apr_thread_mutex_t *lock;

};

/* Create a worker pool with the given minimum and maximum number of

 * threads.

 */

h2_workers *h2_workers_create(server_rec *s, apr_pool_t *pool,

                              int min_size, int max_size, int idle_secs);

/**

 * Registers a h2_mplx for task scheduling. If this h2_mplx runs

 * out of tasks, it will be automatically be unregistered. Should

 * new tasks arrive, it needs to be registered again.

 */

apr_status_t h2_workers_register(h2_workers *workers, struct h2_mplx *m);

/**

 * Remove a h2_mplx from the worker registry.

 */

apr_status_t h2_workers_unregister(h2_workers *workers, struct h2_mplx *m);

#endif /* defined(__mod_h2__h2_workers__) */