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MEMCACHED_EXIST(3)

libmemcached-awesome

MEMCACHED_EXIST(3)

NAME¶

memcached_exist - libmemcached Documentation

SYNOPSIS¶

#include <libmemcached/memcached.h>: Compile and link with -lmemcached

memcached_return_t <#_CPPv418memcached_return_t> memcached_exist(memcached_st <#_CPPv412memcached_st> *ptr, char *key, size_t *key_length)

memcached_return_t <#_CPPv418memcached_return_t> memcached_exist_by_key(memcached_st <#_CPPv412memcached_st> *ptr, char *group_key, size_t *group_key_length, char *key, size_t *key_length)

Parameters

ptr -- pointer to an initialized memcached_st <#_CPPv412memcached_st> struct
group_key -- the key namespace
group_key_length -- length of the group_key without any terminating zero
key -- the key to check
key_length -- length of the key without any terminating zero

Returns: memcached_return_t <#_CPPv418memcached_return_t> indicating success

Added in version 0.53.

DESCRIPTION¶

memcached_exist() can be used to check if a key exists.

RETURN VALUE¶

MEMCACHED_SUCCESS <#_CPPv4N18memcached_return_t17MEMCACHED_SUCCESSE>: The key exists.
MEMCACHED_NOTFOUND <#_CPPv4N18memcached_return_t18MEMCACHED_NOTFOUNDE>: The key was not found.

SEE ALSO¶

memcached(1) <https://linux.die.net/man/1/memcached> libmemcached(3) <https://linux.die.net/man/3/libmemcached> memcached_strerror(3) <https://linux.die.net/man/3/memcached_strerror>

January 17, 2026

1.1