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>