git.m6w6.name Git - awesomized/libmemcached/blob - libmemcached/version.cc

   1 /*  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
   2  *
   3  *  Libmemcached library
   4  *
   5  *  Copyright (C) 2011 Data Differential, http://datadifferential.com/
   6  *  Copyright (C) 2010 Brian Aker 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.
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  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,
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  34  *  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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  36  */
  37 #include <libmemcached/common.h>
  38
  39 const char * memcached_lib_version(void)
  40 {
  41   return LIBMEMCACHED_VERSION_STRING;
  42 }
  43
  44 static inline memcached_return_t memcached_version_textual(Memcached *memc)
  45 {
  46   libmemcached_io_vector_st vector[]=
  47   {
  48     { memcached_literal_param("version\r\n") },
  49   };
  50
  51   uint32_t success= 0;
  52   bool errors_happened= false;
  53   for (uint32_t x= 0; x < memcached_server_count(memc); x++)
  54   {
  55     org::libmemcached::Instance* instance= memcached_instance_fetch(memc, x);
  56
  57     // Optimization, we only fetch version once.
  58     if (instance->major_version != UINT8_MAX)
  59     {
  60       continue;
  61     }
  62
  63     memcached_return_t rrc;
  64     if (memcached_failed(rrc= memcached_vdo(instance, vector, 1, true)))
  65     {
  66       errors_happened= true;
  67       (void)memcached_set_error(*instance, rrc, MEMCACHED_AT);
  68       continue;
  69     }
  70     success++;
  71   }
  72
  73   if (success)
  74   {
  75     // Collect the returned items
  76     org::libmemcached::Instance* instance;
  77     memcached_return_t readable_error;
  78     while ((instance= memcached_io_get_readable_server(memc, readable_error)))
  79     {
  80       memcached_return_t rrc= memcached_response(instance, NULL);
  81       if (memcached_failed(rrc))
  82       {
  83         memcached_io_reset(instance);
  84         errors_happened= true;
  85       }
  86     }
  87   }
  88
  89   return errors_happened ? MEMCACHED_SOME_ERRORS : MEMCACHED_SUCCESS;
  90 }
  91
  92 static inline memcached_return_t memcached_version_binary(Memcached *memc)
  93 {
  94   protocol_binary_request_version request= {};
  95
  96   request.message.header.request.opcode= PROTOCOL_BINARY_CMD_VERSION;
  97   request.message.header.request.datatype= PROTOCOL_BINARY_RAW_BYTES;
  98
  99   libmemcached_io_vector_st vector[]=
 100   {
 101     { request.bytes, sizeof(request.bytes) }
 102   };
 103
 104   uint32_t success= 0;
 105   bool errors_happened= false;
 106   for (uint32_t x= 0; x < memcached_server_count(memc); x++)
 107   {
 108     org::libmemcached::Instance* instance= memcached_instance_fetch(memc, x);
 109
 110     initialize_binary_request(instance, request.message.header);
 111
 112     if (instance->major_version != UINT8_MAX)
 113     {
 114       continue;
 115     }
 116
 117     memcached_return_t rrc= memcached_vdo(instance, vector, 1, true);
 118     if (memcached_failed(rrc))
 119     {
 120       memcached_io_reset(instance);
 121       errors_happened= true;
 122       continue;
 123     }
 124
 125     success++;
 126   }
 127
 128   if (success)
 129   {
 130     // Collect the returned items
 131     org::libmemcached::Instance* instance;
 132     memcached_return_t readable_error;
 133     while ((instance= memcached_io_get_readable_server(memc, readable_error)))
 134     {
 135       char buffer[32];
 136       memcached_return_t rrc= memcached_response(instance, buffer, sizeof(buffer), NULL);
 137       if (memcached_failed(rrc))
 138       {
 139         memcached_io_reset(instance);
 140         errors_happened= true;
 141       }
 142     }
 143   }
 144
 145   return errors_happened ? MEMCACHED_SOME_ERRORS : MEMCACHED_SUCCESS;
 146 }
 147
 148 static inline void version_ascii_instance(org::libmemcached::Instance* instance)
 149 {
 150   if (instance->major_version != UINT8_MAX)
 151   {
 152     libmemcached_io_vector_st vector[]=
 153     {
 154       { memcached_literal_param("version\r\n") },
 155     };
 156
 157     (void)memcached_vdo(instance, vector, 1, false);
 158   }
 159 }
 160
 161 static inline void version_binary_instance(org::libmemcached::Instance* instance)
 162 {
 163   if (instance->major_version != UINT8_MAX)
 164   {
 165     protocol_binary_request_version request= {};
 166
 167     request.message.header.request.opcode= PROTOCOL_BINARY_CMD_VERSION;
 168     request.message.header.request.datatype= PROTOCOL_BINARY_RAW_BYTES;
 169
 170     libmemcached_io_vector_st vector[]=
 171     {
 172       { request.bytes, sizeof(request.bytes) }
 173     };
 174
 175     initialize_binary_request(instance, request.message.header);
 176
 177     (void)memcached_vdo(instance, vector, 1, false);
 178   }
 179 }
 180
 181 void memcached_version_instance(org::libmemcached::Instance* instance)
 182 {
 183   if (instance)
 184   {
 185     if (memcached_has_root(instance))
 186     {
 187       if (memcached_is_fetching_version(instance->root))
 188       {
 189         if (memcached_is_udp(instance->root) == false)
 190         {
 191
 192           if (memcached_is_binary(instance->root))
 193           {
 194             version_binary_instance(instance);
 195             return;
 196           }
 197
 198           version_ascii_instance(instance);
 199         }
 200       }
 201     }
 202   }
 203 }
 204
 205 memcached_return_t memcached_version(memcached_st *shell)
 206 {
 207   Memcached* memc= memcached2Memcached(shell);
 208   if (memc)
 209   {
 210     memcached_return_t rc;
 211     if (memcached_failed(rc= initialize_query(memc, true)))
 212     {
 213       return rc;
 214     }
 215
 216     if (memcached_is_udp(memc))
 217     {
 218       return MEMCACHED_NOT_SUPPORTED;
 219     }
 220
 221     if (memcached_is_binary(memc))
 222     {
 223       return memcached_version_binary(memc);
 224     }
 225
 226     return memcached_version_textual(memc);
 227   }
 228
 229   return MEMCACHED_INVALID_ARGUMENTS;
 230 }