git.m6w6.name Git - awesomized/libmemcached/blob - libmemcached/instance.hpp

   1 /*  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
   2  *
   3  *  Libmemcached library
   4  *
   5  *  Copyright (C) 2012-2013 Data Differential, http://datadifferential.com/
   6  *  All rights reserved.
   7  *
   8  *  Redistribution and use in source and binary forms, with or without
   9  *  modification, are permitted provided that the following conditions are
  10  *  met:
  11  *
  12  *      * Redistributions of source code must retain the above copyright
  13  *  notice, this list of conditions and the following disclaimer.
  14  *
  15  *      * Redistributions in binary form must reproduce the above
  16  *  copyright notice, this list of conditions and the following disclaimer
  17  *  in the documentation and/or other materials provided with the
  18  *  distribution.
  19  *
  20  *      * The names of its contributors may not be used to endorse or
  21  *  promote products derived from this software without specific prior
  22  *  written permission.
  23  *
  24  *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  25  *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  26  *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  27  *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  28  *  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  29  *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  30  *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  31  *  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  32  *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  33  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  34  *  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  35  *
  36  */
  37
  38
  39 #pragma once
  40
  41 #ifndef WIN32
  42 # ifdef HAVE_NETDB_H
  43 #  include <netdb.h>
  44 # endif
  45 #endif
  46
  47 #ifdef NI_MAXHOST
  48 # define MEMCACHED_NI_MAXHOST NI_MAXHOST
  49 #else
  50 # define MEMCACHED_NI_MAXHOST 1025
  51 #endif
  52
  53 #ifdef NI_MAXSERV
  54 # define MEMCACHED_NI_MAXSERV NI_MAXSERV
  55 #else
  56 # define MEMCACHED_NI_MAXSERV 32
  57 #endif
  58
  59 #include "libmemcached/string.hpp"
  60
  61 // @todo Complete class transformation
  62 struct memcached_instance_st {
  63   in_port_t port() const
  64   {
  65     return port_;
  66   }
  67
  68   void port(in_port_t arg)
  69   {
  70     port_= arg;
  71   }
  72
  73   void mark_server_as_clean()
  74   {
  75     server_failure_counter= 0;
  76     server_timeout_counter= 0;
  77     next_retry= 0;
  78   }
  79
  80   void disable()
  81   {
  82   }
  83
  84   void enable()
  85   {
  86   }
  87
  88   bool valid() const;
  89
  90   bool is_shutting_down() const;
  91
  92   void start_close_socket();
  93   void close_socket();
  94   void reset_socket();
  95
  96   uint32_t response_count() const
  97   {
  98     return cursor_active_;
  99   }
 100
 101   struct {
 102     bool is_allocated;
 103     bool is_initialized;
 104     bool is_shutting_down;
 105     bool is_dead;
 106     bool ready;
 107   } options;
 108
 109   short _events;
 110   short _revents;
 111
 112   short events(void)
 113   {
 114     return _events;
 115   }
 116
 117   short revents(void)
 118   {
 119     return _revents;
 120   }
 121
 122   const char* hostname()
 123   {
 124     return _hostname;
 125   }
 126
 127   void hostname(const memcached_string_t& hostname_)
 128   {
 129     if (hostname_.size)
 130     {
 131       memcpy(_hostname, hostname_.c_str, hostname_.size);
 132       _hostname[hostname_.size]= 0;
 133     }
 134     else
 135     {
 136       memcpy(_hostname, memcached_literal_param("localhost"));
 137       _hostname[memcached_literal_param_size("localhost")]= 0;
 138     }
 139   }
 140
 141   void events(short);
 142   void revents(short);
 143
 144   uint32_t cursor_active_;
 145   in_port_t port_;
 146   memcached_socket_t fd;
 147   uint32_t io_bytes_sent; /* # bytes sent since last read */
 148   uint32_t request_id;
 149   uint32_t server_failure_counter;
 150   uint64_t server_failure_counter_query_id;
 151   uint32_t server_timeout_counter;
 152   uint64_t server_timeout_counter_query_id;
 153   uint32_t weight;
 154   uint32_t version;
 155   enum memcached_server_state_t state;
 156   struct {
 157     uint32_t read;
 158     uint32_t write;
 159     uint32_t timeouts;
 160     size_t _bytes_read;
 161   } io_wait_count;
 162   uint8_t major_version; // Default definition of UINT8_MAX means that it has not been set.
 163   uint8_t micro_version; // ditto, and note that this is the third, not second version bit
 164   uint8_t minor_version; // ditto
 165   memcached_connection_t type;
 166   char *read_ptr;
 167   size_t read_buffer_length;
 168   size_t write_buffer_offset;
 169   struct addrinfo *address_info;
 170   struct addrinfo *address_info_next;
 171   time_t next_retry;
 172   struct memcached_st *root;
 173   uint64_t limit_maxbytes;
 174   struct memcached_error_t *error_messages;
 175   char read_buffer[MEMCACHED_MAX_BUFFER];
 176   char write_buffer[MEMCACHED_MAX_BUFFER];
 177   char _hostname[MEMCACHED_NI_MAXHOST];
 178
 179   void clear_addrinfo()
 180   {
 181     if (address_info)
 182     {
 183       freeaddrinfo(address_info);
 184       address_info= NULL;
 185       address_info_next= NULL;
 186     }
 187   }
 188 };
 189
 190 memcached_instance_st* __instance_create_with(memcached_st *memc,
 191                                               memcached_instance_st* self,
 192                                               const memcached_string_t& _hostname,
 193                                               const in_port_t port,
 194                                               uint32_t weight,
 195                                               const memcached_connection_t type);
 196
 197 memcached_return_t memcached_instance_push(memcached_st *ptr, const memcached_instance_st*, uint32_t);
 198
 199 void __instance_free(memcached_instance_st *);