+ std::string ret_val;
+
+ char *value= memcached_get_by_key(&memc, master_key.c_str(), master_key.length(),
+ key.c_str(), key.length(),
+ value_length, &flags, &rc);
+ if (value)
+ {
+ ret_val.assign(value);
+ }
+ return ret_val;
+ }
+
+ bool mget(std::vector<std::string> &keys)
+ {
+ std::vector<const char *> real_keys;
+ std::vector<size_t> key_len;
+ /*
+ * Construct an array which will contain the length
+ * of each of the strings in the input vector. Also, to
+ * interface with the memcached C API, we need to convert
+ * the vector of std::string's to a vector of char *.
+ */
+ real_keys.reserve(keys.size());
+ key_len.reserve(keys.size());
+
+ std::vector<std::string>::iterator it= keys.begin();
+
+ while (it != keys.end())
+ {
+ real_keys.push_back(const_cast<char *>((*it).c_str()));
+ key_len.push_back((*it).length());
+ ++it;
+ }
+
+ /*
+ * If the std::vector of keys is empty then we cannot
+ * call memcached_mget as we will get undefined behavior.
+ */
+ if (!real_keys.empty())
+ {
+ memcached_return rc= memcached_mget(&memc, &real_keys[0], &key_len[0],
+ static_cast<unsigned int>(real_keys.size()));
+ return (rc == MEMCACHED_SUCCESS);
+ }
+
+ return false;
+ }
+
+ bool set(const std::string &key,
+ const std::string &value,
+ time_t expiration,
+ uint32_t flags)
+ {
+ memcached_return rc= memcached_set(&memc,
+ key.c_str(), key.length(),
+ value.c_str(), value.length(),
+ expiration, flags);
+ return (rc == MEMCACHED_SUCCESS || rc == MEMCACHED_BUFFERED);
+ }
+
+ bool set_all(std::vector<std::string> &keys,
+ std::vector<std::string> &values,
+ time_t expiration,
+ uint32_t flags)
+ {
+ if (keys.size() != values.size())
+ {
+ return false;
+ }
+ bool retval= true;
+ std::vector<std::string>::iterator key_it= keys.begin();
+ std::vector<std::string>::iterator val_it= values.begin();
+ while (key_it != keys.end())
+ {
+ retval= set((*key_it), (*val_it), expiration, flags);
+ if (retval == false)
+ {
+ return retval;
+ }
+ ++key_it;
+ ++val_it;
+ }
+ return retval;
+ }
+
+ bool set_by_key(const std::string &master_key,
+ const std::string &key,
+ const std::string &value,
+ time_t expiration,
+ uint32_t flags)
+ {
+ memcached_return rc= memcached_set_by_key(&memc, master_key.c_str(),
+ master_key.length(),
+ key.c_str(), key.length(),
+ value.c_str(), value.length(),
+ expiration,
+ flags);
+ return (rc == MEMCACHED_SUCCESS);
+ }
+
+ bool increment(const std::string &key, unsigned int offset, uint64_t *value)
+ {
+ memcached_return rc= memcached_increment(&memc, key.c_str(), key.length(),
+ offset, value);
+ return (rc == MEMCACHED_SUCCESS);
+ }