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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 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 "SameProcessMessageQueue.h"
#include "nsThreadUtils.h"
using namespace mozilla;
using namespace mozilla::dom;
SameProcessMessageQueue* SameProcessMessageQueue::sSingleton;
SameProcessMessageQueue::SameProcessMessageQueue() = default;
SameProcessMessageQueue::~SameProcessMessageQueue() {
// This code should run during shutdown, and we should already have pumped the
// event loop. So we should only see messages here if someone is sending
// messages pretty late in shutdown.
NS_WARNING_ASSERTION(mQueue.IsEmpty(),
"Shouldn't send messages during shutdown");
sSingleton = nullptr;
}
void SameProcessMessageQueue::Push(Runnable* aRunnable) {
mQueue.AppendElement(aRunnable);
NS_DispatchToCurrentThread(aRunnable);
}
void SameProcessMessageQueue::Flush() {
const nsTArray<RefPtr<Runnable>> queue = std::move(mQueue);
for (size_t i = 0; i < queue.Length(); i++) {
queue[i]->Run();
}
}
/* static */
SameProcessMessageQueue* SameProcessMessageQueue::Get() {
if (!sSingleton) {
sSingleton = new SameProcessMessageQueue();
}
return sSingleton;
}
SameProcessMessageQueue::Runnable::Runnable() : mDispatched(false) {}
NS_IMPL_ISUPPORTS(SameProcessMessageQueue::Runnable, nsIRunnable)
nsresult SameProcessMessageQueue::Runnable::Run() {
if (mDispatched) {
return NS_OK;
}
SameProcessMessageQueue* queue = SameProcessMessageQueue::Get();
queue->mQueue.RemoveElement(this);
mDispatched = true;
return HandleMessage();
}
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