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/* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
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* Copyright (C) 2011 Data Differential, http://datadifferential.com/
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following disclaimer
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* in the documentation and/or other materials provided with the
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* * The names of its contributors may not be used to endorse or
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* promote products derived from this software without specific prior
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include <libmemcachedprotocol-0.0/handler.h>
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#include <libmemcachedprotocol/cache.h>
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#include <libmemcached/byteorder.h>
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#include <libmemcached/socket.hpp>
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* I don't really need the following two functions as function pointers
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* in the instance handle, but I don't want to put them in the global
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* namespace for those linking statically (personally I don't like that,
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* but some people still do). If it ever shows up as a performance thing
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* I'll look into optimizing this ;-)
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typedef bool (*drain_func)(memcached_protocol_client_st *client);
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typedef protocol_binary_response_status (*spool_func)(memcached_protocol_client_st *client,
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* Definition of the per instance structure.
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struct memcached_protocol_st {
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memcached_binary_protocol_callback_st *callback;
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memcached_protocol_recv_func recv;
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memcached_protocol_send_func send;
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* I really don't need these as funciton pointers, but I don't want
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* to clutter the namespace if someone links statically.
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* To avoid keeping a buffer in each client all the time I have a
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* bigger buffer in the instance that I read to initially, and then
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* I try to parse and execute as much from the buffer. If I wasn't able
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* to process all data I'll keep that in a per-connection buffer until
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* the next time I can read from the socket.
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uint8_t *input_buffer;
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size_t input_buffer_size;
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/* @todo use multiple sized buffers */
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cache_t *buffer_cache;
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/* Pointer to the data */
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/* The offset to the first byte into the buffer that is used */
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/* The offset into the buffer for the first free byte */
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/* The number of bytes in the buffer */
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/* Pointer to the next buffer in the chain */
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struct chunk_st *next;
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#define CHUNK_BUFFERSIZE 2048
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typedef memcached_protocol_event_t (*process_data)(struct memcached_protocol_client_st *client, ssize_t *length, void **endptr);
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struct memcached_protocol_client_st {
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memcached_protocol_st *root;
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memcached_socket_t sock;
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/* Linked list of data to send */
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struct chunk_st *output;
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struct chunk_st *output_tail;
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* While we process input data, this is where we spool incomplete commands
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* if we need to receive more data....
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* @todo use the buffercace
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uint8_t *input_buffer;
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size_t input_buffer_size;
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size_t input_buffer_offset;
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/* The callback to the protocol handler to use (ascii or binary) */
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* Should the spool data discard the data to send or not? (aka noreply in
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* the ascii protocol..
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/* Members used by the binary protocol */
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protocol_binary_request_header *current_command;
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/* Members used by the ascii protocol */
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enum ascii_cmd ascii_command;
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#include "ascii_handler.h"
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#include "binary_handler.h"