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80 lines
2.4 KiB
C++
80 lines
2.4 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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#ifndef transportflow_h__
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#define transportflow_h__
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#include <deque>
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#include <queue>
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#include <string>
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#include "nscore.h"
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#include "nsISupportsImpl.h"
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#include "transportlayer.h"
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#include "m_cpp_utils.h"
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// A stack of transport layers acts as a flow.
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// Generally, one reads and writes to the top layer.
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namespace mozilla {
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class TransportFlow : public sigslot::has_slots<> {
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public:
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TransportFlow() : id_("(anonymous)") {}
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TransportFlow(const std::string id) : id_(id) {}
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~TransportFlow();
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const std::string& id() const { return id_; }
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// Layer management. Note PushLayer() is not thread protected, so
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// either:
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// (a) Do it in the thread handling the I/O
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// (b) Do it before you activate the I/O system
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//
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// The flow takes ownership of the layers after a successful
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// push.
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nsresult PushLayer(TransportLayer *layer);
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// Convenience function to push multiple layers on. Layers
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// are pushed on in the order that they are in the queue.
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// Any layers which cannot be pushed on are just deleted
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// and an error is returned.
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// TODO(ekr@rtfm.com): Change layers to be ref-counted.
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nsresult PushLayers(std::queue<TransportLayer *> layers);
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TransportLayer *top() const;
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TransportLayer *GetLayer(const std::string& id) const;
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// Wrappers for whatever TLayer happens to be the top layer
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// at the time. This way you don't need to do top()->Foo().
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TransportLayer::State state(); // Current state
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TransportResult SendPacket(const unsigned char *data, size_t len);
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// State has changed. Reflects the top flow.
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sigslot::signal2<TransportFlow *, TransportLayer::State>
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SignalStateChange;
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// Data received on the flow
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sigslot::signal3<TransportFlow*, const unsigned char *, size_t>
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SignalPacketReceived;
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NS_INLINE_DECL_THREADSAFE_REFCOUNTING(TransportFlow)
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private:
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DISALLOW_COPY_ASSIGN(TransportFlow);
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void StateChange(TransportLayer *layer, TransportLayer::State state);
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void PacketReceived(TransportLayer* layer, const unsigned char *data,
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size_t len);
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std::string id_;
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std::deque<TransportLayer *> layers_;
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};
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} // close namespace
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#endif
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