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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "mojo/edk/system/endpoint_relayer.h"
#include "base/logging.h"
#include "mojo/edk/system/channel_endpoint.h"
#include "mojo/edk/system/message_in_transit.h"
namespace mojo {
namespace system {
EndpointRelayer::EndpointRelayer() {
}
// static
unsigned EndpointRelayer::GetPeerPort(unsigned port) {
DCHECK(port == 0 || port == 1);
return port ^ 1;
}
void EndpointRelayer::Init(ChannelEndpoint* endpoint0,
ChannelEndpoint* endpoint1) {
DCHECK(endpoint0);
DCHECK(endpoint1);
DCHECK(!endpoints_[0]);
DCHECK(!endpoints_[1]);
endpoints_[0] = endpoint0;
endpoints_[1] = endpoint1;
}
bool EndpointRelayer::OnReadMessage(unsigned port, MessageInTransit* message) {
DCHECK(message);
base::AutoLock locker(lock_);
// If we're no longer the client, then reject the message.
if (!endpoints_[port])
return false;
// Otherwise, consume it even if the peer port is closed.
unsigned peer_port = GetPeerPort(port);
if (endpoints_[peer_port])
endpoints_[peer_port]->EnqueueMessage(make_scoped_ptr(message));
return true;
}
void EndpointRelayer::OnDetachFromChannel(unsigned port) {
base::AutoLock locker(lock_);
if (endpoints_[port]) {
endpoints_[port]->DetachFromClient();
endpoints_[port] = nullptr;
}
unsigned peer_port = GetPeerPort(port);
if (endpoints_[peer_port]) {
endpoints_[peer_port]->DetachFromClient();
endpoints_[peer_port] = nullptr;
}
}
EndpointRelayer::~EndpointRelayer() {
DCHECK(!endpoints_[0]);
DCHECK(!endpoints_[1]);
}
} // namespace system
} // namespace mojo
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