MEMCACHED_TOUCH(3) libmemcached-awesome MEMCACHED_TOUCH(3)

memcached_touch - libmemcached Documentation

#include <libmemcached/memcached.h>
Compile and link with -lmemcached
  • ptr -- pointer to initialized memcached_st <#_CPPv412memcached_st> struct
  • key -- the key to touch
  • key_length -- the length of key without any terminating zero
  • expiration -- new expiration as a unix timestamp or as relative expiration time in seconds
memcached_return_t <#_CPPv418memcached_return_t> indicating success
  • ptr -- pointer to initialized memcached_st <#_CPPv412memcached_st> struct
  • group_key -- the key namespace
  • group_key_length -- the length of group_key without any terminating zero
  • key -- the key to touch
  • key_length -- the length of key without any terminating zero
  • expiration -- new expiration as a unix timestamp or as relative expiration time in seconds
memcached_return_t <#_CPPv418memcached_return_t> indicating success

memcached_touch() is used to update the expiration time on an existing key. memcached_touch_by_key() works the same, but it takes a master key to find the given value.

A value of type memcached_return_t <#_CPPv418memcached_return_t> is returned. On success that value will be MEMCACHED_SUCCESS <#_CPPv4N18memcached_return_t17MEMCACHED_SUCCESSE>. Use memcached_strerror() <#_CPPv418memcached_strerrorP12memcached_st18memcached_return_t> to translate this value to a printable string.

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

March 7, 2026 1.1