git.m6w6.name Git - m6w6/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     strncpy(key, result_buffer->key, result_buffer->key_length);
  30     *key_length= result_buffer->key_length;
  31   }
  32
  33   if (result_buffer->flags)
  34     *flags= result_buffer->flags;
  35   else
  36     *flags= 0;
  37
  38   return memcached_string_c_copy(&result_buffer->value);
  39 }
  40
  41 memcached_result_st *memcached_fetch_result(memcached_st *ptr,
  42                                             memcached_result_st *result,
  43                                             memcached_return_t *error)
  44 {
  45   memcached_server_st *server;
  46
  47   unlikely (ptr->flags.use_udp)
  48   {
  49     *error= MEMCACHED_NOT_SUPPORTED;
  50     return NULL;
  51   }
  52
  53   if (result == NULL)
  54     if ((result= memcached_result_create(ptr, NULL)) == NULL)
  55       return NULL;
  56
  57   while ((server = memcached_io_get_readable_server(ptr)) != NULL)
  58   {
  59     char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
  60     *error= memcached_response(server, buffer, sizeof(buffer), result);
  61
  62     if (*error == MEMCACHED_SUCCESS)
  63       return result;
  64     else if (*error == MEMCACHED_END)
  65       memcached_server_response_reset(server);
  66     else if (*error != MEMCACHED_NOTFOUND)
  67       break;
  68   }
  69
  70   /* We have completed reading data */
  71   if (memcached_is_allocated(result))
  72   {
  73     memcached_result_free(result);
  74   }
  75   else
  76   {
  77     memcached_string_reset(&result->value);
  78   }
  79
  80   return NULL;
  81 }
  82
  83 memcached_return_t memcached_fetch_execute(memcached_st *ptr,
  84                                            memcached_execute_fn *callback,
  85                                            void *context,
  86                                            uint32_t number_of_callbacks)
  87 {
  88   memcached_result_st *result= &ptr->result;
  89   memcached_return_t rc= MEMCACHED_FAILURE;
  90   unsigned int x;
  91
  92   while ((result= memcached_fetch_result(ptr, result, &rc)) != NULL)
  93   {
  94     if (rc == MEMCACHED_SUCCESS)
  95     {
  96       for (x= 0; x < number_of_callbacks; x++)
  97       {
  98         rc= (*callback[x])(ptr, result, context);
  99         if (rc != MEMCACHED_SUCCESS)
 100           break;
 101       }
 102     }
 103   }
 104   return rc;
 105 }