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memcached_touch_by_key

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>