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