1 /* Copyright 2015 greenbytes GmbH (https://www.greenbytes.de)
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #ifndef __mod_h2__h2_workers__
18 #define __mod_h2__h2_workers__
20 /* Thread pool specific to executing h2_tasks. Has a minimum and maximum
21 * number of workers it creates. Starts with minimum workers and adds
22 * some on load, reduces the number again when idle.
25 struct apr_thread_mutex_t;
26 struct apr_thread_cond_t;
31 typedef struct h2_workers h2_workers;
42 apr_threadattr_t *thread_attr;
44 APR_RING_HEAD(h2_worker_list, h2_worker) workers;
45 APR_RING_HEAD(h2_worker_zombies, h2_worker) zombies;
46 APR_RING_HEAD(h2_mplx_list, h2_mplx) mplxs;
49 volatile apr_uint32_t max_idle_secs;
50 volatile apr_uint32_t idle_worker_count;
52 struct apr_thread_mutex_t *lock;
53 struct apr_thread_cond_t *mplx_added;
57 /* Create a worker pool with the given minimum and maximum number of
60 h2_workers *h2_workers_create(server_rec *s, apr_pool_t *pool,
61 int min_size, int max_size);
63 /* Destroy the worker pool and all its threads.
65 void h2_workers_destroy(h2_workers *workers);
68 * Registers a h2_mplx for task scheduling. If this h2_mplx runs
69 * out of tasks, it will be automatically be unregistered. Should
70 * new tasks arrive, it needs to be registered again.
72 apr_status_t h2_workers_register(h2_workers *workers,
76 * Remove a h2_mplx from the worker registry.
78 apr_status_t h2_workers_unregister(h2_workers *workers,
82 * Set the amount of seconds a h2_worker should wait for new tasks
83 * before shutting down (if there are more than the minimum number of
86 void h2_workers_set_max_idle_secs(h2_workers *workers, int idle_secs);
88 #endif /* defined(__mod_h2__h2_workers__) */