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

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