git.m6w6.name Git - awesomized/libmemcached/blob - src/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.
  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,
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  30  *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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  32  *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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  34  *  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  35  *
  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     memcached_instance_st* 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     memcached_instance_st* 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         errors_happened= true;
  84       }
  85     }
  86   }
  87
  88   return errors_happened ? MEMCACHED_SOME_ERRORS : MEMCACHED_SUCCESS;
  89 }
  90
  91 static inline memcached_return_t memcached_version_binary(Memcached *memc)
  92 {
  93   protocol_binary_request_version request= {};
  94
  95   request.message.header.request.opcode= PROTOCOL_BINARY_CMD_VERSION;
  96   request.message.header.request.datatype= PROTOCOL_BINARY_RAW_BYTES;
  97
  98   libmemcached_io_vector_st vector[]=
  99   {
 100     { request.bytes, sizeof(request.bytes) }
 101   };
 102
 103   uint32_t success= 0;
 104   bool errors_happened= false;
 105   for (uint32_t x= 0; x < memcached_server_count(memc); x++)
 106   {
 107     memcached_instance_st* instance= memcached_instance_fetch(memc, x);
 108
 109     initialize_binary_request(instance, request.message.header);
 110
 111     if (instance->major_version != UINT8_MAX)
 112     {
 113       continue;
 114     }
 115
 116     memcached_return_t rrc= memcached_vdo(instance, vector, 1, true);
 117     if (memcached_failed(rrc))
 118     {
 119       errors_happened= true;
 120       continue;
 121     }
 122
 123     success++;
 124   }
 125
 126   if (success)
 127   {
 128     // Collect the returned items
 129     memcached_instance_st* instance;
 130     memcached_return_t readable_error;
 131     while ((instance= memcached_io_get_readable_server(memc, readable_error)))
 132     {
 133       char buffer[32];
 134       memcached_return_t rrc= memcached_response(instance, buffer, sizeof(buffer), NULL);
 135       if (memcached_failed(rrc))
 136       {
 137         errors_happened= true;
 138       }
 139     }
 140   }
 141
 142   return errors_happened ? MEMCACHED_SOME_ERRORS : MEMCACHED_SUCCESS;
 143 }
 144
 145 static inline void version_ascii_instance(memcached_instance_st* instance)
 146 {
 147   if (instance->major_version != UINT8_MAX)
 148   {
 149     libmemcached_io_vector_st vector[]=
 150     {
 151       { memcached_literal_param("version\r\n") },
 152     };
 153
 154     (void)memcached_vdo(instance, vector, 1, false);
 155   }
 156 }
 157
 158 static inline void version_binary_instance(memcached_instance_st* instance)
 159 {
 160   if (instance->major_version != UINT8_MAX)
 161   {
 162     protocol_binary_request_version request= {};
 163
 164     request.message.header.request.opcode= PROTOCOL_BINARY_CMD_VERSION;
 165     request.message.header.request.datatype= PROTOCOL_BINARY_RAW_BYTES;
 166
 167     libmemcached_io_vector_st vector[]=
 168     {
 169       { request.bytes, sizeof(request.bytes) }
 170     };
 171
 172     initialize_binary_request(instance, request.message.header);
 173
 174     (void)memcached_vdo(instance, vector, 1, false);
 175   }
 176 }
 177
 178 void memcached_version_instance(memcached_instance_st* instance)
 179 {
 180   if (instance)
 181   {
 182     if (memcached_has_root(instance))
 183     {
 184       if (memcached_is_fetching_version(instance->root))
 185       {
 186         if (memcached_is_udp(instance->root) == false)
 187         {
 188
 189           if (memcached_is_binary(instance->root))
 190           {
 191             version_binary_instance(instance);
 192             return;
 193           }
 194
 195           version_ascii_instance(instance);
 196         }
 197       }
 198     }
 199   }
 200 }
 201
 202 int8_t memcached_version_instance_cmp(memcached_instance_st *instance,
 203     uint8_t maj, uint8_t min, uint8_t mic)
 204 {
 205   if (!instance || memcached_server_major_version(instance) == UINT8_MAX) {
 206     return INT8_MIN;
 207   } else {
 208     uint32_t sv, cv;
 209
 210     sv = memcached_server_micro_version(instance)
 211         |memcached_server_minor_version(instance) << 8
 212         |memcached_server_major_version(instance) << 16
 213         ;
 214     cv = mic
 215         |min << 8
 216         |maj << 16
 217         ;
 218     if (sv < cv) {
 219       return -1;
 220     }
 221     return sv != cv;
 222   }
 223 }
 224
 225 memcached_return_t memcached_version(memcached_st *shell)
 226 {
 227   Memcached* memc= memcached2Memcached(shell);
 228   if (memc)
 229   {
 230     memcached_return_t rc;
 231     if (memcached_failed(rc= initialize_query(memc, true)))
 232     {
 233       return rc;
 234     }
 235
 236     if (memcached_is_udp(memc))
 237     {
 238       return MEMCACHED_NOT_SUPPORTED;
 239     }
 240
 241     if (memcached_is_binary(memc))
 242     {
 243       return memcached_version_binary(memc);
 244     }
 245
 246     return memcached_version_textual(memc);
 247   }
 248
 249   return MEMCACHED_INVALID_ARGUMENTS;
 250 }