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.
  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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  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_st *ptr)
  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(ptr); x++)
  54   {
  55     memcached_server_write_instance_st instance= memcached_server_instance_fetch(ptr, 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_server_write_instance_st instance;
  77     while ((instance= memcached_io_get_readable_server(ptr)))
  78     {
  79       memcached_return_t rrc= memcached_response(instance, NULL);
  80       if (memcached_failed(rrc))
  81       {
  82         memcached_io_reset(instance);
  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_st *ptr)
  92 {
  93   protocol_binary_request_version request= {};
  94   request.message.header.request.magic= PROTOCOL_BINARY_REQ;
  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(ptr); x++)
 106   {
 107     memcached_server_write_instance_st instance= memcached_server_instance_fetch(ptr, x);
 108
 109     if (instance->major_version != UINT8_MAX)
 110     {
 111       continue;
 112     }
 113
 114     memcached_return_t rrc= memcached_vdo(instance, vector, 1, true);
 115     if (memcached_failed(rrc))
 116     {
 117       memcached_io_reset(instance);
 118       errors_happened= true;
 119       continue;
 120     }
 121
 122     success++;
 123   }
 124
 125   if (success)
 126   {
 127     // Collect the returned items
 128     memcached_server_write_instance_st instance;
 129     while ((instance= memcached_io_get_readable_server(ptr)))
 130     {
 131       char buffer[32];
 132       memcached_return_t rrc= memcached_response(instance, buffer, sizeof(buffer), NULL);
 133       if (memcached_failed(rrc))
 134       {
 135         memcached_io_reset(instance);
 136         errors_happened= true;
 137       }
 138     }
 139   }
 140
 141   return errors_happened ? MEMCACHED_SOME_ERRORS : MEMCACHED_SUCCESS;
 142 }
 143
 144 memcached_return_t memcached_version(memcached_st *ptr)
 145 {
 146   memcached_return_t rc;
 147   if (memcached_failed(rc= initialize_query(ptr, true)))
 148   {
 149     return rc;
 150   }
 151
 152   if (memcached_is_udp(ptr))
 153   {
 154     return MEMCACHED_NOT_SUPPORTED;
 155   }
 156
 157   if (memcached_is_binary(ptr))
 158   {
 159     return memcached_version_binary(ptr);
 160   }
 161
 162   return memcached_version_textual(ptr);
 163 }