git.m6w6.name Git - awesomized/libmemcached/blob - docs/source/libmemcached/memcached_exist.rst

   1 ===========================
   2 Determine if a keys exists.
   3 ===========================
   4
   5 .. index:: object: memcached_st
   6
   7 SYNOPSIS
   8 --------
   9
  10 #include <libmemcached/memcached.h>
  11
  12 .. function::  memcached_return_t memcached_exist(memcached_st *ptr, char *key, size_t *key_length)
  13
  14 .. function::  memcached_return_t memcached_exist_by_key(memcached_st *ptr, char *group_key, size_t *group_key_length, char *key, size_t *key_length)
  15
  16 Compile and link with -lmemcached
  17
  18 .. versionadded:: 0.53
  19
  20 DESCRIPTION
  21 -----------
  22
  23 :func:`memcached_exist()` can be used to check if a key exists.
  24
  25 RETURN
  26 ------
  27
  28 `MEMCACHED_SUCCESS`
  29   The key exists.
  30
  31 `MEMCACHED_NOTFOUND`
  32   The key was not found.
  33
  34 SEE ALSO
  35 --------
  36
  37 .. only:: man
  38
  39   :manpage:`memcached(1)` :manpage:`libmemcached(3)` :manpage:`memcached_strerror(3)`
  40