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/* Copyright 2015 greenbytes GmbH (https://www.greenbytes.de)
*
* 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.
*/
#ifndef __mod_h2__h2_io__
#define __mod_h2__h2_io__
struct h2_response;
struct apr_thread_cond_t;
struct h2_task;
typedef apr_status_t h2_io_data_cb(void *ctx,
const char *data, apr_size_t len);
typedef struct h2_io h2_io;
struct h2_io {
int id; /* stream identifier */
apr_bucket_brigade *bbin; /* input data for stream */
int eos_in;
int task_done;
apr_size_t input_consumed; /* how many bytes have been read */
struct apr_thread_cond_t *input_arrived; /* block on reading */
apr_bucket_brigade *bbout; /* output data from stream */
struct apr_thread_cond_t *output_drained; /* block on writing */
struct h2_response *response;/* submittable response created */
int files_handles_owned;
};
/*******************************************************************************
* Object lifecycle and information.
******************************************************************************/
/**
* Creates a new h2_io for the given stream id.
*/
h2_io *h2_io_create(int id, apr_pool_t *pool, apr_bucket_alloc_t *bucket_alloc);
/**
* Frees any resources hold by the h2_io instance.
*/
void h2_io_destroy(h2_io *io);
/**
* The input data is completely queued. Blocked reads will return immediately
* and give either data or EOF.
*/
int h2_io_in_has_eos_for(h2_io *io);
/**
* Output data is available.
*/
int h2_io_out_has_data(h2_io *io);
/*******************************************************************************
* Input handling of streams.
******************************************************************************/
/**
* Reads the next bucket from the input. Returns APR_EAGAIN if none
* is currently available, APR_EOF if end of input has been reached.
*/
apr_status_t h2_io_in_read(h2_io *io, apr_bucket_brigade *bb,
apr_size_t maxlen);
/**
* Appends given bucket to the input.
*/
apr_status_t h2_io_in_write(h2_io *io, apr_bucket_brigade *bb);
/**
* Closes the input. After existing data has been read, APR_EOF will
* be returned.
*/
apr_status_t h2_io_in_close(h2_io *io);
/*******************************************************************************
* Output handling of streams.
******************************************************************************/
/**
* Read a bucket from the output head. Return APR_EAGAIN if non is available,
* APR_EOF if none available and output has been closed.
* May be called with buffer == NULL in order to find out how much data
* is available.
* @param io the h2_io to read output from
* @param buffer the buffer to copy the data to, may be NULL
* @param plen the requested max len, set to amount of data on return
* @param peos != 0 iff the end of stream has been reached
*/
apr_status_t h2_io_out_readx(h2_io *io,
h2_io_data_cb *cb, void *ctx,
apr_size_t *plen, int *peos);
apr_status_t h2_io_out_write(h2_io *io, apr_bucket_brigade *bb,
apr_size_t maxlen, int *pfile_buckets_allowed);
/**
* Closes the input. After existing data has been read, APR_EOF will
* be returned.
*/
apr_status_t h2_io_out_close(h2_io *io);
/**
* Gives the overall length of the data that is currently queued for
* output.
*/
apr_size_t h2_io_out_length(h2_io *io);
#endif /* defined(__mod_h2__h2_io__) */
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