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

   1 #include "common.h"
   2
   3 memcached_return memcached_delete(memcached_st *ptr, const char *key, size_t key_length,
   4                                   time_t expiration)
   5 {
   6   return memcached_delete_by_key(ptr, key, key_length,
   7                                  key, key_length, expiration);
   8 }
   9
  10 memcached_return memcached_delete_by_key(memcached_st *ptr,
  11                                          const char *master_key, size_t master_key_length,
  12                                          const char *key, size_t key_length,
  13                                          time_t expiration)
  14 {
  15   char to_write;
  16   size_t send_length;
  17   memcached_return rc;
  18   char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
  19   unsigned int server_key;
  20
  21   LIBMEMCACHED_MEMCACHED_DELETE_START();
  22
  23   unlikely (key_length == 0)
  24     return MEMCACHED_NO_KEY_PROVIDED;
  25
  26   unlikely (ptr->hosts == NULL || ptr->number_of_hosts == 0)
  27     return MEMCACHED_NO_SERVERS;
  28
  29   server_key= memcached_generate_hash(ptr, master_key, master_key_length);
  30
  31   if (expiration)
  32     send_length= snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
  33                           "delete %s%.*s %llu\r\n",
  34                           ptr->prefix_key,
  35                           (int)key_length, key,
  36                           (unsigned long long)expiration);
  37   else
  38     send_length= snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
  39                           "delete %s%.*s\r\n",
  40                           ptr->prefix_key,
  41                           (int)key_length, key);
  42
  43   if (send_length >= MEMCACHED_DEFAULT_COMMAND_SIZE)
  44   {
  45     rc= MEMCACHED_WRITE_FAILURE;
  46     goto error;
  47   }
  48
  49   to_write= (ptr->flags & MEM_BUFFER_REQUESTS) ? 0 : 1;
  50
  51   rc= memcached_do(&ptr->hosts[server_key], buffer, send_length, to_write);
  52   if (rc != MEMCACHED_SUCCESS)
  53     goto error;
  54
  55   if ((ptr->flags & MEM_BUFFER_REQUESTS))
  56   {
  57     rc= MEMCACHED_BUFFERED;
  58   }
  59   else
  60   {
  61     rc= memcached_response(&ptr->hosts[server_key], buffer, MEMCACHED_DEFAULT_COMMAND_SIZE, NULL);
  62     if (rc == MEMCACHED_DELETED)
  63       rc= MEMCACHED_SUCCESS;
  64   }
  65
  66   if (rc == MEMCACHED_SUCCESS && ptr->delete_trigger)
  67     ptr->delete_trigger(ptr, key, key_length);
  68
  69 error:
  70   LIBMEMCACHED_MEMCACHED_DELETE_END();
  71   return rc;
  72 }