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

   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: Change any of the possible callbacks.
   9  *
  10  */
  11
  12 #include <libmemcached/common.h>
  13 #include <sys/types.h>
  14
  15 #ifndef __INTEL_COMPILER
  16 #pragma GCC diagnostic ignored "-Wstrict-aliasing"
  17 #endif
  18
  19 /*
  20   These functions provide data and function callback support
  21 */
  22
  23 memcached_return_t memcached_callback_set(memcached_st *ptr,
  24                                           const memcached_callback_t flag,
  25                                           const void *data)
  26 {
  27   switch (flag)
  28   {
  29   case MEMCACHED_CALLBACK_PREFIX_KEY:
  30     {
  31       return memcached_set_namespace(ptr, (char*)data, data ? strlen((char*)data) : 0);
  32     }
  33
  34   case MEMCACHED_CALLBACK_USER_DATA:
  35     {
  36       ptr->user_data= const_cast<void *>(data);
  37       break;
  38     }
  39
  40   case MEMCACHED_CALLBACK_CLEANUP_FUNCTION:
  41     {
  42       memcached_cleanup_fn func= *(memcached_cleanup_fn *)&data;
  43       ptr->on_cleanup= func;
  44       break;
  45     }
  46
  47   case MEMCACHED_CALLBACK_CLONE_FUNCTION:
  48     {
  49       memcached_clone_fn func= *(memcached_clone_fn *)&data;
  50       ptr->on_clone= func;
  51       break;
  52     }
  53
  54   case MEMCACHED_CALLBACK_GET_FAILURE:
  55     {
  56       memcached_trigger_key_fn func= *(memcached_trigger_key_fn *)&data;
  57       ptr->get_key_failure= func;
  58       break;
  59     }
  60
  61   case MEMCACHED_CALLBACK_DELETE_TRIGGER:
  62     {
  63       if (memcached_behavior_get(ptr, MEMCACHED_BEHAVIOR_BUFFER_REQUESTS))
  64       {
  65         return memcached_set_error(*ptr, MEMCACHED_INVALID_ARGUMENTS, MEMCACHED_AT, memcached_literal_param("Delete triggers cannot be used if buffering is enabled"));
  66       }
  67
  68       if (memcached_behavior_get(ptr, MEMCACHED_BEHAVIOR_NOREPLY))
  69       {
  70         return memcached_set_error(*ptr, MEMCACHED_INVALID_ARGUMENTS, MEMCACHED_AT, memcached_literal_param("Delete triggers cannot be used if MEMCACHED_BEHAVIOR_NOREPLY is set"));
  71       }
  72
  73       memcached_trigger_delete_key_fn func= *(memcached_trigger_delete_key_fn *)&data;
  74       ptr->delete_trigger= func;
  75       break;
  76     }
  77   case MEMCACHED_CALLBACK_MAX:
  78     return MEMCACHED_FAILURE;
  79   }
  80
  81   return MEMCACHED_SUCCESS;
  82 }
  83
  84 void *memcached_callback_get(memcached_st *ptr,
  85                              const memcached_callback_t flag,
  86                              memcached_return_t *error)
  87 {
  88   memcached_return_t local_error;
  89
  90   if (error == NULL)
  91   {
  92     error = &local_error;
  93   }
  94
  95   if (ptr == NULL)
  96   {
  97     *error= MEMCACHED_INVALID_ARGUMENTS;
  98     return NULL;
  99   }
 100
 101   switch (flag)
 102   {
 103   case MEMCACHED_CALLBACK_PREFIX_KEY:
 104     {
 105       *error= MEMCACHED_SUCCESS;
 106       if (ptr->_namespace)
 107       {
 108         return (void *)memcached_array_string(ptr->_namespace);
 109       }
 110       return NULL;
 111     }
 112
 113   case MEMCACHED_CALLBACK_USER_DATA:
 114     {
 115       *error= ptr->user_data ? MEMCACHED_SUCCESS : MEMCACHED_FAILURE;
 116       return (void *)ptr->user_data;
 117     }
 118
 119   case MEMCACHED_CALLBACK_CLEANUP_FUNCTION:
 120     {
 121       *error= ptr->on_cleanup ? MEMCACHED_SUCCESS : MEMCACHED_FAILURE;
 122       return *(void **)&ptr->on_cleanup;
 123     }
 124
 125   case MEMCACHED_CALLBACK_CLONE_FUNCTION:
 126     {
 127       *error= ptr->on_clone ? MEMCACHED_SUCCESS : MEMCACHED_FAILURE;
 128       return *(void **)&ptr->on_clone;
 129     }
 130
 131   case MEMCACHED_CALLBACK_GET_FAILURE:
 132     {
 133       *error= ptr->get_key_failure ? MEMCACHED_SUCCESS : MEMCACHED_FAILURE;
 134       return *(void **)&ptr->get_key_failure;
 135     }
 136
 137   case MEMCACHED_CALLBACK_DELETE_TRIGGER:
 138     {
 139       *error= ptr->delete_trigger ? MEMCACHED_SUCCESS : MEMCACHED_FAILURE;
 140       return *(void **)&ptr->delete_trigger;
 141     }
 142
 143   case MEMCACHED_CALLBACK_MAX:
 144     break;
 145   }
 146
 147   assert_msg(0, "Invalid behavior passed to memcached_behavior_set()");
 148   *error= MEMCACHED_FAILURE;
 149   return NULL;
 150 }