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// Copyright 2019 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef BASE_MESSAGE_LOOP_MESSAGE_PUMP_TYPE_H_
#define BASE_MESSAGE_LOOP_MESSAGE_PUMP_TYPE_H_
#include "build/build_config.h"
namespace base {
// A MessagePump has a particular type, which indicates the set of
// asynchronous events it may process in addition to tasks and timers.
enum class MessagePumpType {
// This type of pump only supports tasks and timers.
DEFAULT,
// This type of pump also supports native UI events (e.g., Windows
// messages).
UI,
// User provided implementation of MessagePump interface
CUSTOM,
// This type of pump also supports asynchronous IO.
IO,
#if defined(OS_ANDROID)
// This type of pump is backed by a Java message handler which is
// responsible for running the tasks added to the ML. This is only for use
// on Android. TYPE_JAVA behaves in essence like TYPE_UI, except during
// construction where it does not use the main thread specific pump factory.
JAVA,
#endif // defined(OS_ANDROID)
#if defined(OS_MACOSX)
// This type of pump is backed by a NSRunLoop. This is only for use on
// OSX and IOS.
NS_RUNLOOP,
#endif // defined(OS_MACOSX)
#if defined(OS_WIN)
// This type of pump supports WM_QUIT messages in addition to other native
// UI events. This is only for use on windows.
UI_WITH_WM_QUIT_SUPPORT,
#endif // defined(OS_WIN)
};
} // namespace base
#endif // BASE_MESSAGE_LOOP_MESSAGE_PUMP_TYPE_H_
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