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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.
*/
#ifndef __MOD_HTTP2_H__
#define __MOD_HTTP2_H__
/** The http2_var_lookup() optional function retrieves HTTP2 environment
* variables. */
APR_DECLARE_OPTIONAL_FN(char *,
http2_var_lookup, (apr_pool_t *, server_rec *,
conn_rec *, request_rec *, char *));
/** An optional function which returns non-zero if the given connection
* or its master connection is using HTTP/2. */
APR_DECLARE_OPTIONAL_FN(int,
http2_is_h2, (conn_rec *));
/*******************************************************************************
* HTTP/2 request engines
******************************************************************************/
struct apr_thread_cond_t;
typedef struct h2_req_engine h2_req_engine;
typedef void http2_output_consumed(void *ctx, conn_rec *c, apr_off_t consumed);
/**
* Initialize a h2_req_engine. The structure will be passed in but
* only the name and master are set. The function should initialize
* all fields.
* @param engine the allocated, partially filled structure
* @param r the first request to process, or NULL
*/
typedef apr_status_t http2_req_engine_init(h2_req_engine *engine,
const char *id,
const char *type,
apr_pool_t *pool,
apr_size_t req_buffer_size,
request_rec *r,
http2_output_consumed **pconsumed,
void **pbaton);
/**
* Push a request to an engine with the specified name for further processing.
* If no such engine is available, einit is not NULL, einit is called
* with a new engine record and the caller is responsible for running the
* new engine instance.
* @param engine_type the type of the engine to add the request to
* @param r the request to push to an engine for processing
* @param einit an optional initialization callback for a new engine
* of the requested type, should no instance be available.
* By passing a non-NULL callback, the caller is willing
* to init and run a new engine itself.
* @return APR_SUCCESS iff slave was successfully added to an engine
*/
APR_DECLARE_OPTIONAL_FN(apr_status_t,
http2_req_engine_push, (const char *engine_type,
request_rec *r,
http2_req_engine_init *einit));
/**
* Get a new request for processing in this engine.
* @param engine the engine which is done processing the slave
* @param block if call should block waiting for request to come
* @param capacity how many parallel requests are acceptable
* @param pr the request that needs processing or NULL
* @return APR_SUCCESS if new request was assigned
* APR_EAGAIN if no new request is available
* APR_EOF if engine may shut down, as no more request will be scheduled
* APR_ECONNABORTED if the engine needs to shut down immediately
*/
APR_DECLARE_OPTIONAL_FN(apr_status_t,
http2_req_engine_pull, (h2_req_engine *engine,
apr_read_type_e block,
int capacity,
request_rec **pr));
APR_DECLARE_OPTIONAL_FN(void,
http2_req_engine_done, (h2_req_engine *engine,
conn_rec *rconn,
apr_status_t status));
APR_DECLARE_OPTIONAL_FN(void,
http2_get_num_workers, (server_rec *s,
int *minw, int *max));
#endif
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