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 --------
   8 SYNOPSIS
   9 --------
  10
  11 #include <libmemcached/memcached.h>
  12
  13 .. function::  memcached_return_t memcached_exist(memcached_st *ptr, char *key, size_t *key_length)
  14
  15 .. 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)
  16
  17 Compile and link with -lmemcached
  18
  19 .. versionadded:: 0.53
  20
  21 -----------
  22 DESCRIPTION
  23 -----------
  24
  25 :func:`memcached_exist()` can be used to check if a key exists.
  26
  27 ------
  28 RETURN
  29 ------
  30
  31 `MEMCACHED_SUCCESS`
  32   The key exists.
  33
  34 `MEMCACHED_NOTFOUND`
  35   The key was not found.
  36
  37 --------
  38 SEE ALSO
  39 --------
  40
  41 .. only:: man
  42
  43   :manpage:`memcached(1)` :manpage:`libmemcached(3)` :manpage:`memcached_strerror(3)`
  44
  45