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, sent_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 ((rc= memcached_connect(ptr, server_key)) != MEMCACHED_SUCCESS)
  23     return rc;
  24
  25
  26   if (expiration)
  27     send_length= snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
  28                           "delete %.*s %llu\r\n", (int)key_length, key,
  29                           (unsigned long long)expiration);
  30   else
  31     send_length= snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
  32                           "delete %.*s\r\n", (int)key_length, key);
  33
  34   if (send_length >= MEMCACHED_DEFAULT_COMMAND_SIZE)
  35   {
  36     rc= MEMCACHED_WRITE_FAILURE;
  37     goto error;
  38   }
  39
  40   if ((ptr->flags & MEM_NO_BLOCK))
  41     to_write= 0;
  42   else
  43     to_write= 1;
  44
  45   if ((sent_length= memcached_io_write(ptr, server_key, buffer, send_length, to_write)) == -1)
  46   {
  47     memcached_quit_server(ptr, server_key);
  48     rc= MEMCACHED_WRITE_FAILURE;
  49     goto error;
  50   }
  51
  52   if ((ptr->flags & MEM_NO_BLOCK))
  53   {
  54     rc= MEMCACHED_SUCCESS;
  55     memcached_server_response_increment(ptr, server_key);
  56   }
  57   else
  58   {
  59     rc= memcached_response(ptr, buffer, MEMCACHED_DEFAULT_COMMAND_SIZE, server_key);
  60     if (rc == MEMCACHED_DELETED)
  61       rc= MEMCACHED_SUCCESS;
  62   }
  63
  64   LIBMEMCACHED_MEMCACHED_DELETE_END();
  65
  66 error:
  67   return rc;
  68 }