+ memcached_return_t
+ memcached_increment_by_key (memcached_st *ptr,
+ const char *master_key, size_t master_key_length,
+ const char *key, size_t key_length,
+ unsigned int offset,
+ uint64_t *value);
+
+ memcached_return_t
+ memcached_decrement_by_key (memcached_st *ptr,
+ const char *master_key, size_t master_key_length,
+ const char *key, size_t key_length,
+ unsigned int offset,
+ uint64_t *value);
+
+ memcached_return_t
+ memcached_increment_with_initial_by_key (memcached_st *ptr,
+ const char *master_key,
+ size_t master_key_length,
+ const char *key,
+ size_t key_length,
+ uint64_t offset,
+ uint64_t initial,
+ time_t expiration,
+ uint64_t *value);
+
+ memcached_return_t
+ memcached_decrement_with_initial_by_key (memcached_st *ptr,
+ const char *master_key,
+ size_t master_key_length,
+ const char *key,
+ size_t key_length,
+ uint64_t offset,
+ uint64_t initial,
+ time_t expiration,
+ uint64_t *value);
+