git.m6w6.name Git - awesomized/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 #ifdef NI_MAXSERV
  52 #define MEMCACHED_NI_MAXSERV NI_MAXSERV
  53 #else
  54 #define MEMCACHED_NI_MAXSERV 32
  55 #endif
  56
  57 enum memcached_server_state_t {
  58   MEMCACHED_SERVER_STATE_NEW, // fd == -1, no address lookup has been done
  59   MEMCACHED_SERVER_STATE_ADDRINFO, // ADDRRESS information has been gathered
  60   MEMCACHED_SERVER_STATE_IN_PROGRESS,
  61   MEMCACHED_SERVER_STATE_CONNECTED,
  62   MEMCACHED_SERVER_STATE_IN_TIMEOUT
  63 };
  64
  65 struct memcached_server_st {
  66   struct {
  67     bool is_allocated:1;
  68     bool is_initialized:1;
  69     bool is_shutting_down:1;
  70     bool is_dead:1;
  71   } options;
  72   uint32_t number_of_hosts;
  73   uint32_t cursor_active;
  74   in_port_t port;
  75   memcached_socket_t fd;
  76   uint32_t io_bytes_sent; /* # bytes sent since last read */
  77   uint32_t server_failure_counter;
  78   uint64_t server_failure_counter_query_id;
  79   uint32_t weight;
  80   uint32_t version;
  81   enum memcached_server_state_t state;
  82   struct {
  83     uint32_t read;
  84     uint32_t write;
  85     uint32_t timeouts;
  86   } io_wait_count;
  87   uint8_t major_version; // Default definition of UINT8_MAX means that it has not been set.
  88   uint8_t micro_version; // ditto
  89   uint8_t minor_version; // ditto
  90   memcached_connection_t type;
  91   char *read_ptr;
  92   size_t read_buffer_length;
  93   size_t read_data_length;
  94   size_t write_buffer_offset;
  95   struct addrinfo *address_info;
  96   struct addrinfo *address_info_next;
  97   time_t next_retry;
  98   struct memcached_st *root;
  99   uint64_t limit_maxbytes;
 100   struct memcached_error_t *error_messages;
 101   char read_buffer[MEMCACHED_MAX_BUFFER];
 102   char write_buffer[MEMCACHED_MAX_BUFFER];
 103   char hostname[MEMCACHED_NI_MAXHOST];
 104 };