зеркало из https://github.com/mozilla/gecko-dev.git
104 строки
3.1 KiB
C++
104 строки
3.1 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_layers_APZThreadUtils_h
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#define mozilla_layers_APZThreadUtils_h
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#include "base/message_loop.h"
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#include "nsINamed.h"
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#include "nsITimer.h"
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namespace mozilla {
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class Runnable;
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namespace layers {
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class APZThreadUtils {
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public:
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/**
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* In the gtest environment everything runs on one thread, so we
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* shouldn't assert that we're on a particular thread. This enables
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* that behaviour.
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*/
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static void SetThreadAssertionsEnabled(bool aEnabled);
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static bool GetThreadAssertionsEnabled();
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/**
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* Set the controller thread.
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*/
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static void SetControllerThread(MessageLoop* aLoop);
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/**
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* This can be used to assert that the current thread is the
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* controller/UI thread (on which input events are received).
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* This does nothing if thread assertions are disabled.
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*/
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static void AssertOnControllerThread();
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/**
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* Run the given task on the APZ "controller thread" for this platform. If
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* this function is called from the controller thread itself then the task is
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* run immediately without getting queued.
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*/
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static void RunOnControllerThread(RefPtr<Runnable>&& aTask);
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/**
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* Returns true if currently on APZ "controller thread".
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*/
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static bool IsControllerThread();
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};
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// A base class for GenericNamedTimerCallback<Function>.
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// This is necessary because NS_IMPL_ISUPPORTS doesn't work for a class
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// template.
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class GenericNamedTimerCallbackBase : public nsITimerCallback, public nsINamed {
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public:
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NS_DECL_THREADSAFE_ISUPPORTS
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protected:
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virtual ~GenericNamedTimerCallbackBase() = default;
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};
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// An nsITimerCallback implementation with nsINamed that can be used with any
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// function object that's callable with no arguments.
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template <typename Function>
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class GenericNamedTimerCallback final : public GenericNamedTimerCallbackBase {
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public:
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GenericNamedTimerCallback(const Function& aFunction, const char* aName)
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: mFunction(aFunction), mName(aName) {}
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NS_IMETHOD Notify(nsITimer*) override {
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mFunction();
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return NS_OK;
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}
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NS_IMETHOD GetName(nsACString& aName) override {
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aName = mName;
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return NS_OK;
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}
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private:
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Function mFunction;
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nsCString mName;
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};
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// Convenience function for constructing a GenericNamedTimerCallback.
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// Returns a raw pointer, suitable for passing directly as an argument to
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// nsITimer::InitWithCallback(). The intention is to enable the following
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// terse inline usage:
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// timer->InitWithCallback(NewNamedTimerCallback([](){ ... }, name), delay);
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template <typename Function>
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GenericNamedTimerCallback<Function>* NewNamedTimerCallback(
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const Function& aFunction, const char* aName) {
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return new GenericNamedTimerCallback<Function>(aFunction, aName);
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}
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} // namespace layers
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} // namespace mozilla
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#endif /* mozilla_layers_APZThreadUtils_h */
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