+ 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],
+ real_keys.size());
+ return (rc == MEMCACHED_SUCCESS);
+ }