nghttp2/lib/nghttp2_outbound_item.h

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/*
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* nghttp2 - HTTP/2 C Library
*
* Copyright (c) 2012 Tatsuhiro Tsujikawa
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
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#ifndef NGHTTP2_OUTBOUND_ITEM_H
#define NGHTTP2_OUTBOUND_ITEM_H
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif /* HAVE_CONFIG_H */
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#include <nghttp2/nghttp2.h>
#include "nghttp2_frame.h"
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/* A bit higher weight for non-DATA frames */
#define NGHTTP2_OB_EX_WEIGHT 300
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/* Higher weight for SETTINGS */
#define NGHTTP2_OB_SETTINGS_WEIGHT 301
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/* Highest weight for PING */
#define NGHTTP2_OB_PING_WEIGHT 302
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/* struct used for HEADERS and PUSH_PROMISE frame */
typedef struct {
nghttp2_data_provider data_prd;
void *stream_user_data;
/* nonzero if this item should be attached to stream object to make
it under priority control */
uint8_t attach_stream;
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} nghttp2_headers_aux_data;
/* struct used for DATA frame */
typedef struct {
/**
* The data to be sent for this DATA frame.
*/
nghttp2_data_provider data_prd;
/**
* The flags of DATA frame. We use separate flags here and
* nghttp2_data frame. The latter contains flags actually sent to
* peer. This |flags| may contain NGHTTP2_FLAG_END_STREAM and only
* when |eof| becomes nonzero, flags in nghttp2_data has
* NGHTTP2_FLAG_END_STREAM set.
*/
uint8_t flags;
/**
* The flag to indicate whether EOF was reached or not. Initially
* |eof| is 0. It becomes 1 after all data were read.
*/
uint8_t eof;
} nghttp2_data_aux_data;
/* Additional data which cannot be stored in nghttp2_frame struct */
typedef union {
nghttp2_data_aux_data data;
nghttp2_headers_aux_data headers;
} nghttp2_aux_data;
typedef struct {
nghttp2_frame frame;
nghttp2_aux_data aux_data;
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int64_t seq;
/* Reset count of weight. See comment for last_cycle in
nghttp2_session.h */
uint64_t cycle;
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/* The priority used in priority comparion. Larger is served
ealier. */
int32_t weight;
/* nonzero if this object is queued. */
uint8_t queued;
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} nghttp2_outbound_item;
/*
* Deallocates resource for |item|. If |item| is NULL, this function
* does nothing.
*/
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void nghttp2_outbound_item_free(nghttp2_outbound_item *item);
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#endif /* NGHTTP2_OUTBOUND_ITEM_H */