git.m6w6.name Git - awesomized/libmemcached/blob - libmemcached/result.c

   1 /* LibMemcached
   2  * Copyright (C) 2006-2009 Brian Aker
   3  * All rights reserved.
   4  *
   5  * Use and distribution licensed under the BSD license.  See
   6  * the COPYING file in the parent directory for full text.
   7  *
   8  * Summary: Functions to manipulate the result structure.
   9  *
  10  */
  11
  12 /*
  13   memcached_result_st are used to internally represent the return values from
  14   memcached. We use a structure so that long term as identifiers are added
  15   to memcached we will be able to absorb new attributes without having
  16   to addjust the entire API.
  17 */
  18 #include "common.h"
  19
  20 static inline void _result_init(memcached_result_st *self,
  21                                 const memcached_st *memc)
  22 {
  23   self->item_flags= 0;
  24   self->item_expiration= 0;
  25   self->key_length= 0;
  26   self->item_cas= 0;
  27   self->root= memc;
  28   self->item_key[0]= 0;
  29 }
  30
  31 memcached_result_st *memcached_result_create(const memcached_st *memc,
  32                                              memcached_result_st *ptr)
  33 {
  34   WATCHPOINT_ASSERT(memc);
  35
  36   /* Saving malloc calls :) */
  37   if (ptr)
  38   {
  39     ptr->options.is_allocated= false;
  40   }
  41   else
  42   {
  43     ptr= libmemcached_malloc(memc, sizeof(memcached_result_st));
  44
  45     if (ptr == NULL)
  46       return NULL;
  47
  48     ptr->options.is_allocated= true;
  49   }
  50
  51   ptr->options.is_initialized= true;
  52
  53   _result_init(ptr, memc);
  54
  55   ptr->root= memc;
  56   WATCHPOINT_SET(ptr->value.options.is_initialized= false);
  57   memcached_string_create(memc, &ptr->value, 0);
  58   WATCHPOINT_ASSERT_INITIALIZED(&ptr->value);
  59   WATCHPOINT_ASSERT(ptr->value.string == NULL);
  60
  61   return ptr;
  62 }
  63
  64 void memcached_result_reset(memcached_result_st *ptr)
  65 {
  66   ptr->key_length= 0;
  67   memcached_string_reset(&ptr->value);
  68   ptr->item_flags= 0;
  69   ptr->item_cas= 0;
  70   ptr->item_expiration= 0;
  71 }
  72
  73 void memcached_result_free(memcached_result_st *ptr)
  74 {
  75   if (ptr == NULL)
  76     return;
  77
  78   memcached_string_free(&ptr->value);
  79
  80   if (memcached_is_allocated(ptr))
  81   {
  82     WATCHPOINT_ASSERT(ptr->root); // Without a root, that means that result was not properly initialized.
  83     libmemcached_free(ptr->root, ptr);
  84   }
  85   else
  86   {
  87     ptr->options.is_initialized= false;
  88   }
  89 }
  90
  91 memcached_return_t memcached_result_set_value(memcached_result_st *ptr,
  92                                               const char *value,
  93                                               size_t length)
  94 {
  95   memcached_return_t rc= memcached_string_append(&ptr->value, value, length);
  96
  97   if (rc == MEMCACHED_MEMORY_ALLOCATION_FAILURE)
  98   {
  99     ((memcached_st *)ptr->root)->cached_errno= errno;
 100   }
 101
 102       return rc;
 103 }
 104
 105 const char *memcached_result_key_value(const memcached_result_st *self)
 106 {
 107   return self->key_length ? self->item_key : NULL;
 108 }
 109
 110 size_t memcached_result_key_length(const memcached_result_st *self)
 111 {
 112   return self->key_length;
 113 }
 114
 115 const char *memcached_result_value(const memcached_result_st *self)
 116 {
 117   const memcached_string_st *sptr= &self->value;
 118   return memcached_string_value(sptr);
 119 }
 120
 121 size_t memcached_result_length(const memcached_result_st *self)
 122 {
 123   const memcached_string_st *sptr= &self->value;
 124   return memcached_string_length(sptr);
 125 }
 126
 127 uint32_t memcached_result_flags(const memcached_result_st *self)
 128 {
 129   return self->item_flags;
 130 }
 131
 132 uint64_t memcached_result_cas(const memcached_result_st *self)
 133 {
 134   return self->item_cas;
 135 }
 136
 137 void memcached_result_set_flags(memcached_result_st *self, uint32_t flags)
 138 {
 139   self->item_flags= flags;
 140 }
 141
 142 void memcached_result_set_expiration(memcached_result_st *self, time_t expiration)
 143 {
 144   self->item_expiration= expiration;
 145 }