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

   1 #include "common.h"
   2
   3 char *memcached_fetch(memcached_st *ptr, char *key, size_t *key_length,
   4                       size_t *value_length,
   5                       uint32_t *flags,
   6                       memcached_return_t *error)
   7 {
   8   memcached_result_st *result_buffer= &ptr->result;
   9
  10   unlikely (ptr->flags.use_udp)
  11   {
  12     *error= MEMCACHED_NOT_SUPPORTED;
  13     return NULL;
  14   }
  15
  16   result_buffer= memcached_fetch_result(ptr, result_buffer, error);
  17
  18   if (result_buffer == NULL || *error != MEMCACHED_SUCCESS)
  19   {
  20     WATCHPOINT_ASSERT(result_buffer == NULL);
  21     *value_length= 0;
  22     return NULL;
  23   }
  24
  25   *value_length= memcached_string_length(&result_buffer->value);
  26
  27   if (key)
  28   {
  29     if (result_buffer->key_length > MEMCACHED_MAX_KEY)
  30     {
  31       *error= MEMCACHED_KEY_TOO_BIG;
  32       *value_length= 0;
  33
  34       return NULL;
  35     }
  36     strncpy(key, result_buffer->item_key, result_buffer->key_length); // For the binary protocol we will cut off the key :(
  37     *key_length= result_buffer->key_length;
  38   }
  39
  40   *flags= result_buffer->item_flags;
  41
  42   return memcached_string_c_copy(&result_buffer->value);
  43 }
  44
  45 memcached_result_st *memcached_fetch_result(memcached_st *ptr,
  46                                             memcached_result_st *result,
  47                                             memcached_return_t *error)
  48 {
  49   memcached_server_st *server;
  50
  51   unlikely (ptr->flags.use_udp)
  52   {
  53     *error= MEMCACHED_NOT_SUPPORTED;
  54     return NULL;
  55   }
  56
  57   if (result == NULL)
  58     if ((result= memcached_result_create(ptr, NULL)) == NULL)
  59       return NULL;
  60
  61   while ((server= memcached_io_get_readable_server(ptr)) != NULL)
  62   {
  63     char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
  64     *error= memcached_response(server, buffer, sizeof(buffer), result);
  65
  66     if (*error == MEMCACHED_SUCCESS)
  67       return result;
  68     else if (*error == MEMCACHED_END)
  69       memcached_server_response_reset(server);
  70     else if (*error != MEMCACHED_NOTFOUND)
  71       break;
  72   }
  73
  74   /* We have completed reading data */
  75   if (memcached_is_allocated(result))
  76   {
  77     memcached_result_free(result);
  78   }
  79   else
  80   {
  81     memcached_string_reset(&result->value);
  82   }
  83
  84   return NULL;
  85 }
  86
  87 memcached_return_t memcached_fetch_execute(memcached_st *ptr,
  88                                            memcached_execute_fn *callback,
  89                                            void *context,
  90                                            uint32_t number_of_callbacks)
  91 {
  92   memcached_result_st *result= &ptr->result;
  93   memcached_return_t rc= MEMCACHED_FAILURE;
  94
  95   while ((result= memcached_fetch_result(ptr, result, &rc)) != NULL)
  96   {
  97     if (rc == MEMCACHED_SUCCESS)
  98     {
  99       for (uint32_t x= 0; x < number_of_callbacks; x++)
 100       {
 101         rc= (*callback[x])(ptr, result, context);
 102         if (rc != MEMCACHED_SUCCESS)
 103           break;
 104       }
 105     }
 106   }
 107   return rc;
 108 }