зеркало из https://github.com/mozilla/gecko-dev.git
82 строки
2.3 KiB
C++
82 строки
2.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=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 file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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// Original author: ekr@rtfm.com
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#include <deque>
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#include "logging.h"
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#include "runnable_utils.h"
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#include "transportflow.h"
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#include "transportlayer.h"
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#include "mozilla/DebugOnly.h"
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namespace mozilla {
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NS_IMPL_ISUPPORTS0(TransportFlow)
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// There are some hacks here to allow destruction off of
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// the main thread.
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TransportFlow::~TransportFlow() {
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// Push the destruction onto the STS thread. Note that there
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// is still some possibility that someone is accessing this
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// object simultaneously, but as long as smart pointer discipline
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// is maintained, it shouldn't be possible to access and
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// destroy it simultaneously. The conversion to a UniquePtr
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// ensures automatic destruction of the queue at exit of
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// DestroyFinal.
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MOZ_RELEASE_ASSERT(target_);
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DebugOnly<nsresult> rv = target_->Dispatch(
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WrapRunnableNM(&TransportFlow::DestroyFinal, std::move(layers_)),
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NS_DISPATCH_NORMAL);
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MOZ_ASSERT(NS_SUCCEEDED(rv));
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}
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void TransportFlow::DestroyFinal(
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UniquePtr<std::deque<TransportLayer*>> layers) {
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ClearLayers(layers.get());
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}
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void TransportFlow::ClearLayers(std::deque<TransportLayer*>* layers) {
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while (!layers->empty()) {
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delete layers->front();
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layers->pop_front();
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}
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}
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void TransportFlow::PushLayer(TransportLayer* layer) {
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CheckThread();
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layers_->push_front(layer);
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EnsureSameThread(layer);
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layer->SetFlowId(id_);
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}
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TransportLayer* TransportFlow::GetLayer(const std::string& id) const {
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CheckThread();
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if (layers_) {
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for (TransportLayer* layer : *layers_) {
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if (layer->id() == id) return layer;
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}
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}
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return nullptr;
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}
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void TransportFlow::EnsureSameThread(TransportLayer* layer) {
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// Enforce that if any of the layers have a thread binding,
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// they all have the same binding.
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if (target_) {
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const nsCOMPtr<nsIEventTarget>& lthread = layer->GetThread();
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if (lthread && (lthread != target_)) MOZ_CRASH();
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} else {
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target_ = layer->GetThread();
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}
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}
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} // namespace mozilla
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