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/*
* nghttp2 - HTTP/2 C Library
*
* Copyright (c) 2014 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.
*/
#ifndef LIBEVENT_UTIL_H
#define LIBEVENT_UTIL_H
#include "nghttp2_config.h"
#include <event2/buffer.h>
#include <event2/bufferevent.h>
namespace nghttp2 {
namespace util {
class EvbufferBuffer {
public:
EvbufferBuffer();
// If |limit| is not -1, at most min(limit, bufmax) size bytes are
// added to evbuffer_.
EvbufferBuffer(evbuffer *evbuffer, uint8_t *buf, size_t bufmax,
ssize_t limit = -1);
~EvbufferBuffer();
void reset(evbuffer *evbuffer, uint8_t *buf, size_t bufmax,
ssize_t limit = -1);
int flush();
int add(const uint8_t *data, size_t datalen);
size_t get_buflen() const;
int write_buffer();
// Returns the number of written bytes to evbuffer_ so far. reset()
// resets this value to 0.
size_t get_writelen() const;
private:
evbuffer *evbuffer_;
evbuffer *bucket_;
uint8_t *buf_;
size_t bufmax_;
size_t buflen_;
ssize_t limit_;
size_t writelen_;
};
// These functions are provided to reduce epoll_ctl syscall. Avoid
// calling bufferevent_enable/disable() unless it is required by
// sniffing current enabled events.
void bev_enable_unless(bufferevent *bev, int events);
void bev_disable_unless(bufferevent *bev, int events);
} // namespace util
} // namespace nghttp2
#endif // LIBEVENT_UTIL_H
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