+memcached_return memcached_append(memcached_st *ptr,
+ char *key, size_t key_length,
+ char *value, size_t value_length,
+ time_t expiration,
+ uint16_t flags);
+memcached_return memcached_prepend(memcached_st *ptr,
+ char *key, size_t key_length,
+ char *value, size_t value_length,
+ time_t expiration,
+ uint16_t flags);
+memcached_return memcached_cas(memcached_st *ptr,
+ char *key, size_t key_length,
+ char *value, size_t value_length,
+ time_t expiration,
+ uint16_t flags,
+ uint64_t cas);