Move //mojo/{public, edk} underneath //third_party

mojo/edk/system/message_pipe.cc

Index: mojo/edk/system/message_pipe.cc
diff --git a/mojo/edk/system/message_pipe.cc b/mojo/edk/system/message_pipe.cc
deleted file mode 100644
index 554401e875bd2ab8103ae07931406abe6b823928..0000000000000000000000000000000000000000
--- a/mojo/edk/system/message_pipe.cc
+++ /dev/null
@@ -1,384 +0,0 @@
-// Copyright 2013 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/message_pipe.h"
-
-#include "base/logging.h"
-#include "mojo/edk/system/channel.h"
-#include "mojo/edk/system/channel_endpoint.h"
-#include "mojo/edk/system/channel_endpoint_id.h"
-#include "mojo/edk/system/incoming_endpoint.h"
-#include "mojo/edk/system/local_message_pipe_endpoint.h"
-#include "mojo/edk/system/message_in_transit.h"
-#include "mojo/edk/system/message_pipe_dispatcher.h"
-#include "mojo/edk/system/message_pipe_endpoint.h"
-#include "mojo/edk/system/proxy_message_pipe_endpoint.h"
-
-namespace mojo {
-namespace system {
-
-// static
-MessagePipe* MessagePipe::CreateLocalLocal() {
-  MessagePipe* message_pipe = new MessagePipe();
-  message_pipe->endpoints_[0].reset(new LocalMessagePipeEndpoint());
-  message_pipe->endpoints_[1].reset(new LocalMessagePipeEndpoint());
-  return message_pipe;
-}
-
-// static
-MessagePipe* MessagePipe::CreateLocalProxy(
-    scoped_refptr<ChannelEndpoint>* channel_endpoint) {
-  DCHECK(!*channel_endpoint);  // Not technically wrong, but unlikely.
-  MessagePipe* message_pipe = new MessagePipe();
-  message_pipe->endpoints_[0].reset(new LocalMessagePipeEndpoint());
-  *channel_endpoint = new ChannelEndpoint(message_pipe, 1);
-  message_pipe->endpoints_[1].reset(
-      new ProxyMessagePipeEndpoint(channel_endpoint->get()));
-  return message_pipe;
-}
-
-// static
-MessagePipe* MessagePipe::CreateLocalProxyFromExisting(
-    MessageInTransitQueue* message_queue,
-    ChannelEndpoint* channel_endpoint) {
-  DCHECK(message_queue);
-  MessagePipe* message_pipe = new MessagePipe();
-  message_pipe->endpoints_[0].reset(
-      new LocalMessagePipeEndpoint(message_queue));
-  if (channel_endpoint) {
-    bool attached_to_channel = channel_endpoint->ReplaceClient(message_pipe, 1);
-    message_pipe->endpoints_[1].reset(
-        new ProxyMessagePipeEndpoint(channel_endpoint));
-    if (!attached_to_channel)
-      message_pipe->OnDetachFromChannel(1);
-  } else {
-    // This means that the proxy side was already closed; we only need to inform
-    // the local side of this.
-    // TODO(vtl): This is safe to do without locking (but perhaps slightly
-    // dubious), since no other thread has access to |message_pipe| yet.
-    message_pipe->endpoints_[0]->OnPeerClose();
-  }
-  return message_pipe;
-}
-
-// static
-MessagePipe* MessagePipe::CreateProxyLocal(
-    scoped_refptr<ChannelEndpoint>* channel_endpoint) {
-  DCHECK(!*channel_endpoint);  // Not technically wrong, but unlikely.
-  MessagePipe* message_pipe = new MessagePipe();
-  *channel_endpoint = new ChannelEndpoint(message_pipe, 0);
-  message_pipe->endpoints_[0].reset(
-      new ProxyMessagePipeEndpoint(channel_endpoint->get()));
-  message_pipe->endpoints_[1].reset(new LocalMessagePipeEndpoint());
-  return message_pipe;
-}
-
-// static
-unsigned MessagePipe::GetPeerPort(unsigned port) {
-  DCHECK(port == 0 || port == 1);
-  return port ^ 1;
-}
-
-// static
-bool MessagePipe::Deserialize(Channel* channel,
-                              const void* source,
-                              size_t size,
-                              scoped_refptr<MessagePipe>* message_pipe,
-                              unsigned* port) {
-  DCHECK(!*message_pipe);  // Not technically wrong, but unlikely.
-
-  if (size != channel->GetSerializedEndpointSize()) {
-    LOG(ERROR) << "Invalid serialized message pipe";
-    return false;
-  }
-
-  scoped_refptr<IncomingEndpoint> incoming_endpoint =
-      channel->DeserializeEndpoint(source);
-  if (!incoming_endpoint)
-    return false;
-
-  *message_pipe = incoming_endpoint->ConvertToMessagePipe();
-  DCHECK(*message_pipe);
-  *port = 0;
-  return true;
-}
-
-MessagePipeEndpoint::Type MessagePipe::GetType(unsigned port) {
-  DCHECK(port == 0 || port == 1);
-  base::AutoLock locker(lock_);
-  DCHECK(endpoints_[port]);
-
-  return endpoints_[port]->GetType();
-}
-
-void MessagePipe::CancelAllAwakables(unsigned port) {
-  DCHECK(port == 0 || port == 1);
-
-  base::AutoLock locker(lock_);
-  DCHECK(endpoints_[port]);
-  endpoints_[port]->CancelAllAwakables();
-}
-
-void MessagePipe::Close(unsigned port) {
-  DCHECK(port == 0 || port == 1);
-
-  unsigned peer_port = GetPeerPort(port);
-
-  base::AutoLock locker(lock_);
-  // The endpoint's |OnPeerClose()| may have been called first and returned
-  // false, which would have resulted in its destruction.
-  if (!endpoints_[port])
-    return;
-
-  endpoints_[port]->Close();
-  if (endpoints_[peer_port]) {
-    if (!endpoints_[peer_port]->OnPeerClose())
-      endpoints_[peer_port].reset();
-  }
-  endpoints_[port].reset();
-}
-
-// TODO(vtl): Handle flags.
-MojoResult MessagePipe::WriteMessage(
-    unsigned port,
-    UserPointer<const void> bytes,
-    uint32_t num_bytes,
-    std::vector<DispatcherTransport>* transports,
-    MojoWriteMessageFlags flags) {
-  DCHECK(port == 0 || port == 1);
-
-  base::AutoLock locker(lock_);
-  return EnqueueMessageNoLock(
-      GetPeerPort(port),
-      make_scoped_ptr(new MessageInTransit(
-          MessageInTransit::kTypeEndpoint,
-          MessageInTransit::kSubtypeEndpointData, num_bytes, bytes)),
-      transports);
-}
-
-MojoResult MessagePipe::ReadMessage(unsigned port,
-                                    UserPointer<void> bytes,
-                                    UserPointer<uint32_t> num_bytes,
-                                    DispatcherVector* dispatchers,
-                                    uint32_t* num_dispatchers,
-                                    MojoReadMessageFlags flags) {
-  DCHECK(port == 0 || port == 1);
-
-  base::AutoLock locker(lock_);
-  DCHECK(endpoints_[port]);
-
-  return endpoints_[port]->ReadMessage(bytes, num_bytes, dispatchers,
-                                       num_dispatchers, flags);
-}
-
-HandleSignalsState MessagePipe::GetHandleSignalsState(unsigned port) const {
-  DCHECK(port == 0 || port == 1);
-
-  base::AutoLock locker(const_cast<base::Lock&>(lock_));
-  DCHECK(endpoints_[port]);
-
-  return endpoints_[port]->GetHandleSignalsState();
-}
-
-MojoResult MessagePipe::AddAwakable(unsigned port,
-                                    Awakable* awakable,
-                                    MojoHandleSignals signals,
-                                    uint32_t context,
-                                    HandleSignalsState* signals_state) {
-  DCHECK(port == 0 || port == 1);
-
-  base::AutoLock locker(lock_);
-  DCHECK(endpoints_[port]);
-
-  return endpoints_[port]->AddAwakable(awakable, signals, context,
-                                       signals_state);
-}
-
-void MessagePipe::RemoveAwakable(unsigned port,
-                                 Awakable* awakable,
-                                 HandleSignalsState* signals_state) {
-  DCHECK(port == 0 || port == 1);
-
-  base::AutoLock locker(lock_);
-  DCHECK(endpoints_[port]);
-
-  endpoints_[port]->RemoveAwakable(awakable, signals_state);
-}
-
-void MessagePipe::StartSerialize(unsigned /*port*/,
-                                 Channel* channel,
-                                 size_t* max_size,
-                                 size_t* max_platform_handles) {
-  *max_size = channel->GetSerializedEndpointSize();
-  *max_platform_handles = 0;
-}
-
-bool MessagePipe::EndSerialize(
-    unsigned port,
-    Channel* channel,
-    void* destination,
-    size_t* actual_size,
-    embedder::PlatformHandleVector* /*platform_handles*/) {
-  DCHECK(port == 0 || port == 1);
-
-  base::AutoLock locker(lock_);
-  DCHECK(endpoints_[port]);
-
-  // The port being serialized must be local.
-  DCHECK_EQ(endpoints_[port]->GetType(), MessagePipeEndpoint::kTypeLocal);
-
-  unsigned peer_port = GetPeerPort(port);
-  MessageInTransitQueue* message_queue =
-      static_cast<LocalMessagePipeEndpoint*>(endpoints_[port].get())
-          ->message_queue();
-  // The replacement for |endpoints_[port]|, if any.
-  MessagePipeEndpoint* replacement_endpoint = nullptr;
-
-  // The three cases below correspond to the ones described above
-  // |Channel::SerializeEndpoint...()| (in channel.h).
-  if (!endpoints_[peer_port]) {
-    // Case 1: (known-)closed peer port. There's no reason for us to continue to
-    // exist afterwards.
-    channel->SerializeEndpointWithClosedPeer(destination, message_queue);
-  } else if (endpoints_[peer_port]->GetType() ==
-             MessagePipeEndpoint::kTypeLocal) {
-    // Case 2: local peer port. We replace |port|'s |LocalMessagePipeEndpoint|
-    // with a |ProxyMessagePipeEndpoint| hooked up to the |ChannelEndpoint| that
-    // the |Channel| returns to us.
-    scoped_refptr<ChannelEndpoint> channel_endpoint =
-        channel->SerializeEndpointWithLocalPeer(destination, message_queue,
-                                                this, port);
-    replacement_endpoint = new ProxyMessagePipeEndpoint(channel_endpoint.get());
-  } else {
-    // Case 3: remote peer port. We get the |peer_port|'s |ChannelEndpoint| and
-    // pass it to the |Channel|. There's no reason for us to continue to exist
-    // afterwards.
-    DCHECK_EQ(endpoints_[peer_port]->GetType(),
-              MessagePipeEndpoint::kTypeProxy);
-    ProxyMessagePipeEndpoint* peer_endpoint =
-        static_cast<ProxyMessagePipeEndpoint*>(endpoints_[peer_port].get());
-    scoped_refptr<ChannelEndpoint> peer_channel_endpoint =
-        peer_endpoint->ReleaseChannelEndpoint();
-    channel->SerializeEndpointWithRemotePeer(destination, message_queue,
-                                             peer_channel_endpoint);
-    // No need to call |Close()| after |ReleaseChannelEndpoint()|.
-    endpoints_[peer_port].reset();
-  }
-
-  endpoints_[port]->Close();
-  endpoints_[port].reset(replacement_endpoint);
-
-  *actual_size = channel->GetSerializedEndpointSize();
-  return true;
-}
-
-bool MessagePipe::OnReadMessage(unsigned port, MessageInTransit* message) {
-  base::AutoLock locker(lock_);
-
-  if (!endpoints_[port]) {
-    // This will happen only on the rare occasion that the call to
-    // |OnReadMessage()| is racing with us calling
-    // |ChannelEndpoint::ReplaceClient()|, in which case we reject the message,
-    // and the |ChannelEndpoint| can retry (calling the new client's
-    // |OnReadMessage()|).
-    return false;
-  }
-
-  // This is called when the |ChannelEndpoint| for the
-  // |ProxyMessagePipeEndpoint| |port| receives a message (from the |Channel|).
-  // We need to pass this message on to its peer port (typically a
-  // |LocalMessagePipeEndpoint|).
-  MojoResult result = EnqueueMessageNoLock(GetPeerPort(port),
-                                           make_scoped_ptr(message), nullptr);
-  DLOG_IF(WARNING, result != MOJO_RESULT_OK)
-      << "EnqueueMessageNoLock() failed (result  = " << result << ")";
-  return true;
-}
-
-void MessagePipe::OnDetachFromChannel(unsigned port) {
-  Close(port);
-}
-
-MessagePipe::MessagePipe() {
-}
-
-MessagePipe::~MessagePipe() {
-  // Owned by the dispatchers. The owning dispatchers should only release us via
-  // their |Close()| method, which should inform us of being closed via our
-  // |Close()|. Thus these should already be null.
-  DCHECK(!endpoints_[0]);
-  DCHECK(!endpoints_[1]);
-}
-
-MojoResult MessagePipe::EnqueueMessageNoLock(
-    unsigned port,
-    scoped_ptr<MessageInTransit> message,
-    std::vector<DispatcherTransport>* transports) {
-  DCHECK(port == 0 || port == 1);
-  DCHECK(message);
-
-  DCHECK_EQ(message->type(), MessageInTransit::kTypeEndpoint);
-  DCHECK(endpoints_[GetPeerPort(port)]);
-
-  // The destination port need not be open, unlike the source port.
-  if (!endpoints_[port])
-    return MOJO_RESULT_FAILED_PRECONDITION;
-
-  if (transports) {
-    MojoResult result = AttachTransportsNoLock(port, message.get(), transports);
-    if (result != MOJO_RESULT_OK)
-      return result;
-  }
-
-  // The endpoint's |EnqueueMessage()| may not report failure.
-  endpoints_[port]->EnqueueMessage(message.Pass());
-  return MOJO_RESULT_OK;
-}
-
-MojoResult MessagePipe::AttachTransportsNoLock(
-    unsigned port,
-    MessageInTransit* message,
-    std::vector<DispatcherTransport>* transports) {
-  DCHECK(!message->has_dispatchers());
-
-  // You're not allowed to send either handle to a message pipe over the message
-  // pipe, so check for this. (The case of trying to write a handle to itself is
-  // taken care of by |Core|. That case kind of makes sense, but leads to
-  // complications if, e.g., both sides try to do the same thing with their
-  // respective handles simultaneously. The other case, of trying to write the
-  // peer handle to a handle, doesn't make sense -- since no handle will be
-  // available to read the message from.)
-  for (size_t i = 0; i < transports->size(); i++) {
-    if (!(*transports)[i].is_valid())
-      continue;
-    if ((*transports)[i].GetType() == Dispatcher::kTypeMessagePipe) {
-      MessagePipeDispatcherTransport mp_transport((*transports)[i]);
-      if (mp_transport.GetMessagePipe() == this) {
-        // The other case should have been disallowed by |Core|. (Note: |port|
-        // is the peer port of the handle given to |WriteMessage()|.)
-        DCHECK_EQ(mp_transport.GetPort(), port);
-        return MOJO_RESULT_INVALID_ARGUMENT;
-      }
-    }
-  }
-
-  // Clone the dispatchers and attach them to the message. (This must be done as
-  // a separate loop, since we want to leave the dispatchers alone on failure.)
-  scoped_ptr<DispatcherVector> dispatchers(new DispatcherVector());
-  dispatchers->reserve(transports->size());
-  for (size_t i = 0; i < transports->size(); i++) {
-    if ((*transports)[i].is_valid()) {
-      dispatchers->push_back(
-          (*transports)[i].CreateEquivalentDispatcherAndClose());
-    } else {
-      LOG(WARNING) << "Enqueueing null dispatcher";
-      dispatchers->push_back(nullptr);
-    }
-  }
-  message->SetDispatchers(dispatchers.Pass());
-  return MOJO_RESULT_OK;
-}
-
-}  // namespace system
-}  // namespace mojo