2 * Copyright 2015 Facebook, Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
20 #include <folly/Executor.h>
26 namespace folly { namespace wangle {
28 // An IOExecutor is an executor that operates on at least one EventBase. One of
29 // these EventBases should be accessible via getEventBase(). The event base
30 // returned by a call to getEventBase() is implementation dependent.
32 // Note that IOExecutors don't necessarily loop on the base themselves - for
33 // instance, EventBase itself is an IOExecutor but doesn't drive itself.
35 // Implementations of IOExecutor are eligible to become the global IO executor,
36 // returned on every call to getIOExecutor(), via setIOExecutor().
37 // These functions are declared in GlobalExecutor.h
39 // If getIOExecutor is called and none has been set, a default global
40 // IOThreadPoolExecutor will be created and returned.
41 class IOExecutor : public virtual Executor {
43 virtual ~IOExecutor() {}
44 virtual EventBase* getEventBase() = 0;