| /* |
| Licensed to the Apache Software Foundation (ASF) under one |
| or more contributor license agreements. See the NOTICE file |
| distributed with this work for additional information |
| regarding copyright ownership. The ASF licenses this file |
| to you under the Apache License, Version 2.0 (the |
| "License"); you may not use this file except in compliance |
| with the License. You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| */ |
| |
| /** |
| * @file fetch_policy.cc |
| * @brief Fetch policy interface. |
| */ |
| |
| #include "fetch_policy.h" |
| |
| #include <cstring> |
| |
| #include "common.h" |
| #include "fetch_policy_lru.h" |
| #include "fetch_policy_simple.h" |
| |
| FetchPolicy * |
| FetchPolicy::getInstance(const char *parameters) |
| { |
| const char *name = parameters; |
| const char *delim = strchr(parameters, ':'); |
| size_t len = (nullptr == delim ? strlen(name) : delim - name); |
| const char *params = (nullptr == delim ? nullptr : delim + 1); |
| |
| PrefetchDebug("getting '%.*s' policy instance, params: %s", (int)len, name, params); |
| FetchPolicy *p = nullptr; |
| if (6 == len && 0 == strncmp(name, "simple", 6)) { |
| p = new FetchPolicySimple(); |
| } else if (3 == len && 0 == strncmp(name, "lru", 3)) { |
| p = new FetchPolicyLru(); |
| } else { |
| PrefetchError("unrecognized fetch policy type: %.*s", (int)len, name); |
| return nullptr; |
| } |
| |
| if (p->init(params)) { |
| return p; |
| } |
| delete p; |
| |
| return nullptr; |
| } |