git.m6w6.name Git - m6w6/libmemcached/blob - libmemcached-1.0/struct/server.h

   1 /*  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
   2  *
   3  *  Libmemcached library
   4  *
   5  *  Copyright (C) 2011 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 #include <netdb.h>
  43 #endif
  44
  45 #ifdef NI_MAXHOST
  46 #define MEMCACHED_NI_MAXHOST NI_MAXHOST
  47 #else
  48 #define MEMCACHED_NI_MAXHOST 1025
  49 #endif
  50
  51 enum memcached_server_state_t {
  52   MEMCACHED_SERVER_STATE_NEW, // fd == -1, no address lookup has been done
  53   MEMCACHED_SERVER_STATE_ADDRINFO, // ADDRRESS information has been gathered
  54   MEMCACHED_SERVER_STATE_IN_PROGRESS,
  55   MEMCACHED_SERVER_STATE_CONNECTED,
  56   MEMCACHED_SERVER_STATE_IN_TIMEOUT
  57 };
  58
  59 struct memcached_server_st {
  60   struct {
  61     bool is_allocated:1;
  62     bool is_initialized:1;
  63     bool is_shutting_down:1;
  64     bool is_dead:1;
  65   } options;
  66   uint32_t number_of_hosts;
  67   uint32_t cursor_active;
  68   in_port_t port;
  69   memcached_socket_t fd;
  70   uint32_t io_bytes_sent; /* # bytes sent since last read */
  71   uint32_t server_failure_counter;
  72   uint64_t server_failure_counter_query_id;
  73   uint32_t weight;
  74   uint32_t version;
  75   enum memcached_server_state_t state;
  76   struct {
  77     uint32_t read;
  78     uint32_t write;
  79   } io_wait_count;
  80   uint8_t major_version; // Default definition of UINT8_MAX means that it has not been set.
  81   uint8_t micro_version; // ditto
  82   uint8_t minor_version; // ditto
  83   memcached_connection_t type;
  84   char *read_ptr;
  85   size_t read_buffer_length;
  86   size_t read_data_length;
  87   size_t write_buffer_offset;
  88   struct addrinfo *address_info;
  89   struct addrinfo *address_info_next;
  90   time_t next_retry;
  91   struct memcached_st *root;
  92   uint64_t limit_maxbytes;
  93   struct memcached_error_t *error_messages;
  94   char read_buffer[MEMCACHED_MAX_BUFFER];
  95   char write_buffer[MEMCACHED_MAX_BUFFER];
  96   char hostname[MEMCACHED_NI_MAXHOST];
  97 };