git.m6w6.name Git - m6w6/libmemcached/blob - libmemcached/result.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) 2006-2009 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,
  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 /*
  40   memcached_result_st are used to internally represent the return values from
  41   memcached. We use a structure so that long term as identifiers are added
  42   to memcached we will be able to absorb new attributes without having
  43   to addjust the entire API.
  44 */
  45 #include <libmemcached/common.h>
  46
  47 static inline void _result_init(memcached_result_st *self,
  48                                 memcached_st *memc)
  49 {
  50   self->item_flags= 0;
  51   self->item_expiration= 0;
  52   self->key_length= 0;
  53   self->item_cas= 0;
  54   self->root= memc;
  55   self->item_key[0]= 0;
  56 }
  57
  58 memcached_result_st *memcached_result_create(const memcached_st *memc,
  59                                              memcached_result_st *ptr)
  60 {
  61   WATCHPOINT_ASSERT(memc);
  62
  63   /* Saving malloc calls :) */
  64   if (ptr)
  65   {
  66     ptr->options.is_allocated= false;
  67   }
  68   else
  69   {
  70     ptr= static_cast<memcached_result_st *>(libmemcached_malloc(memc, sizeof(memcached_result_st)));
  71
  72     if (ptr == NULL)
  73       return NULL;
  74
  75     ptr->options.is_allocated= true;
  76   }
  77
  78   ptr->options.is_initialized= true;
  79
  80   _result_init(ptr, (memcached_st *)memc);
  81
  82   WATCHPOINT_SET(ptr->value.options.is_initialized= false);
  83   memcached_string_create(memc, &ptr->value, 0);
  84   WATCHPOINT_ASSERT_INITIALIZED(&ptr->value);
  85   WATCHPOINT_ASSERT(ptr->value.string == NULL);
  86
  87   return ptr;
  88 }
  89
  90 void memcached_result_reset(memcached_result_st *ptr)
  91 {
  92   ptr->key_length= 0;
  93   memcached_string_reset(&ptr->value);
  94   ptr->item_flags= 0;
  95   ptr->item_cas= 0;
  96   ptr->item_expiration= 0;
  97 }
  98
  99 void memcached_result_free(memcached_result_st *ptr)
 100 {
 101   if (ptr == NULL)
 102     return;
 103
 104   memcached_string_free(&ptr->value);
 105
 106   if (memcached_is_allocated(ptr))
 107   {
 108     WATCHPOINT_ASSERT(ptr->root); // Without a root, that means that result was not properly initialized.
 109     libmemcached_free(ptr->root, ptr);
 110   }
 111   else
 112   {
 113     ptr->options.is_initialized= false;
 114   }
 115 }
 116
 117 memcached_return_t memcached_result_set_value(memcached_result_st *ptr,
 118                                               const char *value,
 119                                               size_t length)
 120 {
 121   memcached_return_t rc= memcached_string_append(&ptr->value, value, length);
 122
 123   if (rc == MEMCACHED_MEMORY_ALLOCATION_FAILURE)
 124   {
 125     memcached_set_errno(ptr->root, errno, NULL);
 126   }
 127
 128       return rc;
 129 }
 130
 131 const char *memcached_result_key_value(const memcached_result_st *self)
 132 {
 133   return self->key_length ? self->item_key : NULL;
 134 }
 135
 136 size_t memcached_result_key_length(const memcached_result_st *self)
 137 {
 138   return self->key_length;
 139 }
 140
 141 const char *memcached_result_value(const memcached_result_st *self)
 142 {
 143   const memcached_string_st *sptr= &self->value;
 144   return memcached_string_value(sptr);
 145 }
 146
 147 size_t memcached_result_length(const memcached_result_st *self)
 148 {
 149   const memcached_string_st *sptr= &self->value;
 150   return memcached_string_length(sptr);
 151 }
 152
 153 uint32_t memcached_result_flags(const memcached_result_st *self)
 154 {
 155   return self->item_flags;
 156 }
 157
 158 uint64_t memcached_result_cas(const memcached_result_st *self)
 159 {
 160   return self->item_cas;
 161 }
 162
 163 void memcached_result_set_flags(memcached_result_st *self, uint32_t flags)
 164 {
 165   self->item_flags= flags;
 166 }
 167
 168 void memcached_result_set_expiration(memcached_result_st *self, time_t expiration)
 169 {
 170   self->item_expiration= expiration;
 171 }