Revert "Move mojo edk into mojo/edk"

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 55f12853a4a3e88fbae500f6e9594028f90b26db..0000000000000000000000000000000000000000
--- a/mojo/edk/system/message_pipe.cc
+++ /dev/null
@@ -1,286 +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_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->get());  // 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::CreateProxyLocal(
-    scoped_refptr<ChannelEndpoint>* channel_endpoint) {
-  DCHECK(!channel_endpoint->get());  // 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;
-}
-
-MessagePipeEndpoint::Type MessagePipe::GetType(unsigned port) {
-  DCHECK(port == 0 || port == 1);
-  base::AutoLock locker(lock_);
-  DCHECK(endpoints_[port]);
-
-  return endpoints_[port]->GetType();
-}
-
-void MessagePipe::CancelAllWaiters(unsigned port) {
-  DCHECK(port == 0 || port == 1);
-
-  base::AutoLock locker(lock_);
-  DCHECK(endpoints_[port]);
-  endpoints_[port]->CancelAllWaiters();
-}
-
-void MessagePipe::Close(unsigned port) {
-  DCHECK(port == 0 || port == 1);
-
-  unsigned destination_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_[destination_port]) {
-    if (!endpoints_[destination_port]->OnPeerClose())
-      endpoints_[destination_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);
-  return EnqueueMessageInternal(
-      GetPeerPort(port),
-      make_scoped_ptr(new MessageInTransit(
-          MessageInTransit::kTypeMessagePipeEndpoint,
-          MessageInTransit::kSubtypeMessagePipeEndpointData,
-          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::AddWaiter(unsigned port,
-                                  Waiter* waiter,
-                                  MojoHandleSignals signals,
-                                  uint32_t context,
-                                  HandleSignalsState* signals_state) {
-  DCHECK(port == 0 || port == 1);
-
-  base::AutoLock locker(lock_);
-  DCHECK(endpoints_[port]);
-
-  return endpoints_[port]->AddWaiter(waiter, signals, context, signals_state);
-}
-
-void MessagePipe::RemoveWaiter(unsigned port,
-                               Waiter* waiter,
-                               HandleSignalsState* signals_state) {
-  DCHECK(port == 0 || port == 1);
-
-  base::AutoLock locker(lock_);
-  DCHECK(endpoints_[port]);
-
-  endpoints_[port]->RemoveWaiter(waiter, signals_state);
-}
-
-scoped_refptr<ChannelEndpoint> MessagePipe::ConvertLocalToProxy(unsigned port) {
-  DCHECK(port == 0 || port == 1);
-
-  base::AutoLock locker(lock_);
-  DCHECK(endpoints_[port]);
-  DCHECK_EQ(endpoints_[port]->GetType(), MessagePipeEndpoint::kTypeLocal);
-
-  // TODO(vtl): Allowing this case is a temporary hack. It'll set up a
-  // |MessagePipe| with two proxy endpoints, which will then act as a proxy
-  // (rather than trying to connect the two ends directly).
-  DLOG_IF(WARNING,
-          !!endpoints_[GetPeerPort(port)] &&
-              endpoints_[GetPeerPort(port)]->GetType() !=
-                  MessagePipeEndpoint::kTypeLocal)
-      << "Direct message pipe passing across multiple channels not yet "
-         "implemented; will proxy";
-
-  scoped_ptr<MessagePipeEndpoint> old_endpoint(endpoints_[port].Pass());
-  scoped_refptr<ChannelEndpoint> channel_endpoint(
-      new ChannelEndpoint(this, port));
-  endpoints_[port].reset(new ProxyMessagePipeEndpoint(channel_endpoint.get()));
-  channel_endpoint->TakeMessages(static_cast<LocalMessagePipeEndpoint*>(
-                                     old_endpoint.get())->message_queue());
-  old_endpoint->Close();
-
-  return channel_endpoint;
-}
-
-MojoResult MessagePipe::EnqueueMessage(unsigned port,
-                                       scoped_ptr<MessageInTransit> message) {
-  return EnqueueMessageInternal(port, message.Pass(), nullptr);
-}
-
-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::EnqueueMessageInternal(
-    unsigned port,
-    scoped_ptr<MessageInTransit> message,
-    std::vector<DispatcherTransport>* transports) {
-  DCHECK(port == 0 || port == 1);
-  DCHECK(message);
-
-  if (message->type() == MessageInTransit::kTypeMessagePipe) {
-    DCHECK(!transports);
-    return HandleControlMessage(port, message.Pass());
-  }
-
-  DCHECK_EQ(message->type(), MessageInTransit::kTypeMessagePipeEndpoint);
-
-  base::AutoLock locker(lock_);
-  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(scoped_refptr<Dispatcher>());
-    }
-  }
-  message->SetDispatchers(dispatchers.Pass());
-  return MOJO_RESULT_OK;
-}
-
-MojoResult MessagePipe::HandleControlMessage(
-    unsigned /*port*/,
-    scoped_ptr<MessageInTransit> message) {
-  LOG(WARNING) << "Unrecognized MessagePipe control message subtype "
-               << message->subtype();
-  return MOJO_RESULT_UNKNOWN;
-}
-
-}  // namespace system
-}  // namespace mojo