76 lines
2.4 KiB
C++
76 lines
2.4 KiB
C++
/*
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* nghttp2 - HTTP/2 C Library
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*
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* Copyright (c) 2014 Tatsuhiro Tsujikawa
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef LIBEVENT_UTIL_H
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#define LIBEVENT_UTIL_H
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#include "nghttp2_config.h"
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#include <event2/buffer.h>
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#include <event2/bufferevent.h>
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namespace nghttp2 {
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namespace util {
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class EvbufferBuffer {
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public:
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EvbufferBuffer();
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// If |limit| is not -1, at most min(limit, bufmax) size bytes are
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// added to evbuffer_.
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EvbufferBuffer(evbuffer *evbuffer, uint8_t *buf, size_t bufmax,
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ssize_t limit = -1);
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~EvbufferBuffer();
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void reset(evbuffer *evbuffer, uint8_t *buf, size_t bufmax,
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ssize_t limit = -1);
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int flush();
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int add(const uint8_t *data, size_t datalen);
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size_t get_buflen() const;
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int write_buffer();
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// Returns the number of written bytes to evbuffer_ so far. reset()
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// resets this value to 0.
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size_t get_writelen() const;
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private:
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evbuffer *evbuffer_;
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evbuffer *bucket_;
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uint8_t *buf_;
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size_t bufmax_;
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size_t buflen_;
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ssize_t limit_;
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size_t writelen_;
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};
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// These functions are provided to reduce epoll_ctl syscall. Avoid
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// calling bufferevent_enable/disable() unless it is required by
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// sniffing current enabled events.
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void bev_enable_unless(bufferevent *bev, int events);
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void bev_disable_unless(bufferevent *bev, int events);
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} // namespace util
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} // namespace nghttp2
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#endif // LIBEVENT_UTIL_H
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