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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed 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.
*/
#ifndef WIFICOND_EVENT_LOOP_H_
#define WIFICOND_EVENT_LOOP_H_
#include <functional>
namespace android {
namespace wificond {
// Abstract class for dispatching tasks.
class EventLoop {
public:
enum ReadyMode {
kModeInput,
kModeOutput
};
virtual ~EventLoop() {}
// Enqueues a callback.
// This function can be called on any thread.
virtual void PostTask(const std::function<void()>& callback) = 0;
// Enqueues a callback to be processed after a specified period of time.
// |delay_ms| is delay time in milliseconds. It should not be negative.
// This function can be called on any thread.
virtual void PostDelayedTask(const std::function<void()>& callback,
int64_t delay_ms) = 0;
// Monitoring file descriptor for data.
// Callback will be executed when specific file descriptor is ready.
// File descriptor is provided as a parameter to this callback:
// This function can be called on any thread.
// This returns true upon success and returns false when it failed.
virtual bool WatchFileDescriptor(
int fd,
ReadyMode mode,
const std::function<void(int)>& callback_) = 0;
// Stop monitoring file descriptor |fd|.
// This function can be called on any thread.
// This returns true upon success and returns false when it failed to
// remove the file descriptor, or this file descriptor was not registered
// for watching.
virtual bool StopWatchFileDescriptor(int fd) = 0;
};
} // namespace wificond
} // namespace android
#endif // WIFICOND_EVENT_LOOP_H_
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