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   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                                          char *master_key, size_t master_key_length,
  12                                          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   if (key_length == 0)
  24     return MEMCACHED_NO_KEY_PROVIDED;
  25
  26   if (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 %llu\r\n", (int)key_length, key,
  34                           (unsigned long long)expiration);
  35   else
  36     send_length= snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
  37                           "delete %.*s\r\n", (int)key_length, key);
  38
  39   if (send_length >= MEMCACHED_DEFAULT_COMMAND_SIZE)
  40   {
  41     rc= MEMCACHED_WRITE_FAILURE;
  42     goto error;
  43   }
  44
  45   to_write= (ptr->flags & MEM_BUFFER_REQUESTS) ? 0 : 1;
  46
  47   rc= memcached_do(ptr, server_key, buffer, send_length, to_write);
  48   if (rc != MEMCACHED_SUCCESS)
  49     goto error;
  50
  51   if ((ptr->flags & MEM_BUFFER_REQUESTS))
  52   {
  53     rc= MEMCACHED_BUFFERED;
  54   }
  55   else
  56   {
  57     rc= memcached_response(ptr, buffer, MEMCACHED_DEFAULT_COMMAND_SIZE, NULL, server_key);
  58     if (rc == MEMCACHED_DELETED)
  59       rc= MEMCACHED_SUCCESS;
  60   }
  61
  62 error:
  63   LIBMEMCACHED_MEMCACHED_DELETE_END();
  64   return rc;
  65 }
  66
  67 memcached_return memcached_mdelete(memcached_st *ptr,
  68                                    char **key, size_t *key_length,
  69                                    unsigned int number_of_keys,
  70                                    time_t expiration)
  71 {
  72   return memcached_mdelete_by_key(ptr, NULL, 0,
  73                                    key, key_length,
  74                                    number_of_keys, expiration);
  75
  76 }
  77
  78 memcached_return memcached_mdelete_by_key(memcached_st *ptr,
  79                                           char *master_key, size_t master_key_length,
  80                                           char **key, size_t *key_length,
  81                                           unsigned int number_of_keys,
  82                                           time_t expiration)
  83 {
  84   size_t send_length;
  85   memcached_return rc= MEMCACHED_SUCCESS;
  86   char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
  87   unsigned int master_server_key= 0;
  88   unsigned int x;
  89
  90   LIBMEMCACHED_MEMCACHED_DELETE_START();
  91
  92   if (ptr->hosts == NULL || ptr->number_of_hosts == 0)
  93     return MEMCACHED_NO_SERVERS;
  94
  95   if (master_key && master_key_length)
  96     master_server_key= memcached_generate_hash(ptr, master_key, master_key_length);
  97
  98   for (x= 0; x < number_of_keys; x++)
  99   {
 100     unsigned int server_key;
 101
 102     if (master_key && master_key_length)
 103       server_key= master_server_key;
 104     else
 105       server_key= memcached_generate_hash(ptr, key[x], key_length[x]);
 106
 107     if (expiration)
 108       send_length= snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
 109                             "delete %.*s %llu\r\n", (int)(key_length[x]), key[x],
 110                             (unsigned long long)expiration);
 111     else
 112       send_length= snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
 113                             "delete %.*s\r\n", (int)(key_length[x]), key[x]);
 114
 115     (void)memcached_do(ptr, server_key, buffer, send_length, 0);
 116   }
 117
 118   return MEMCACHED_BUFFERED;
 119 }