gecko/gfx/layers/ipc/TaskThrottler.cpp

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/* -*- Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 8; -*- */
/* vim: set sw=2 sts=2 ts=8 et tw=80 : */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "base/basictypes.h"
#include "base/message_loop.h"
#include "TaskThrottler.h"
namespace mozilla {
namespace layers {
TaskThrottler::TaskThrottler()
: mOutstanding(false)
, mQueuedTask(nullptr)
{ }
void
TaskThrottler::PostTask(const tracked_objects::Location& aLocation,
CancelableTask* aTask)
{
aTask->SetBirthPlace(aLocation);
if (mOutstanding) {
if (mQueuedTask) {
mQueuedTask->Cancel();
}
mQueuedTask = aTask;
} else {
aTask->Run();
delete aTask;
mOutstanding = true;
}
}
bool
TaskThrottler::TaskComplete()
{
if (mQueuedTask) {
mQueuedTask->Run();
mQueuedTask = nullptr;
return true;
}
mOutstanding = false;
return false;
}
}
}