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
  12 #include <libmemcached/memcached.h>
  13
  14 .. function::  memcached_return_t memcached_exist(memcached_st *ptr, char *key, size_t *key_length)
  15
  16 .. 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)
  17
  18 Compile and link with -lmemcached
  19
  20 .. versionadded:: 0.53
  21
  22
  23 -----------
  24 DESCRIPTION
  25 -----------
  26
  27 :func:`memcached_exist()` can be used to check if a key exists.
  28
  29
  30 ------
  31 RETURN
  32 ------
  33
  34 `MEMCACHED_SUCCESS`
  35   The key exists.
  36
  37 `MEMCACHED_NOTFOUND`
  38   The key was not found.
  39
  40 --------
  41 SEE ALSO
  42 --------
  43
  44 .. only:: man
  45
  46   :manpage:`memcached(1)` :manpage:`libmemcached(3)` :manpage:`memcached_strerror(3)`
  47
  48