Revert "Move mojo edk into mojo/edk"

mojo/edk/system/raw_channel_win.cc

Index: mojo/edk/system/raw_channel_win.cc
diff --git a/mojo/edk/system/raw_channel_win.cc b/mojo/edk/system/raw_channel_win.cc
deleted file mode 100644
index 208d59583c7fb564c60604eba22f83e43183024c..0000000000000000000000000000000000000000
--- a/mojo/edk/system/raw_channel_win.cc
+++ /dev/null
@@ -1,585 +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/raw_channel.h"
-
-#include <windows.h>
-
-#include "base/auto_reset.h"
-#include "base/bind.h"
-#include "base/compiler_specific.h"
-#include "base/lazy_instance.h"
-#include "base/location.h"
-#include "base/logging.h"
-#include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/message_loop/message_loop.h"
-#include "base/synchronization/lock.h"
-#include "base/win/windows_version.h"
-#include "mojo/edk/embedder/platform_handle.h"
-
-namespace mojo {
-namespace system {
-
-namespace {
-
-class VistaOrHigherFunctions {
- public:
-  VistaOrHigherFunctions();
-
-  bool is_vista_or_higher() const { return is_vista_or_higher_; }
-
-  BOOL SetFileCompletionNotificationModes(HANDLE handle, UCHAR flags) {
-    return set_file_completion_notification_modes_(handle, flags);
-  }
-
-  BOOL CancelIoEx(HANDLE handle, LPOVERLAPPED overlapped) {
-    return cancel_io_ex_(handle, overlapped);
-  }
-
- private:
-  typedef BOOL(WINAPI* SetFileCompletionNotificationModesFunc)(HANDLE, UCHAR);
-  typedef BOOL(WINAPI* CancelIoExFunc)(HANDLE, LPOVERLAPPED);
-
-  bool is_vista_or_higher_;
-  SetFileCompletionNotificationModesFunc
-      set_file_completion_notification_modes_;
-  CancelIoExFunc cancel_io_ex_;
-};
-
-VistaOrHigherFunctions::VistaOrHigherFunctions()
-    : is_vista_or_higher_(base::win::GetVersion() >= base::win::VERSION_VISTA),
-      set_file_completion_notification_modes_(nullptr),
-      cancel_io_ex_(nullptr) {
-  if (!is_vista_or_higher_)
-    return;
-
-  HMODULE module = GetModuleHandleW(L"kernel32.dll");
-  set_file_completion_notification_modes_ =
-      reinterpret_cast<SetFileCompletionNotificationModesFunc>(
-          GetProcAddress(module, "SetFileCompletionNotificationModes"));
-  DCHECK(set_file_completion_notification_modes_);
-
-  cancel_io_ex_ =
-      reinterpret_cast<CancelIoExFunc>(GetProcAddress(module, "CancelIoEx"));
-  DCHECK(cancel_io_ex_);
-}
-
-base::LazyInstance<VistaOrHigherFunctions> g_vista_or_higher_functions =
-    LAZY_INSTANCE_INITIALIZER;
-
-class RawChannelWin : public RawChannel {
- public:
-  RawChannelWin(embedder::ScopedPlatformHandle handle);
-  virtual ~RawChannelWin();
-
-  // |RawChannel| public methods:
-  virtual size_t GetSerializedPlatformHandleSize() const override;
-
- private:
-  // RawChannelIOHandler receives OS notifications for I/O completion. It must
-  // be created on the I/O thread.
-  //
-  // It manages its own destruction. Destruction happens on the I/O thread when
-  // all the following conditions are satisfied:
-  //   - |DetachFromOwnerNoLock()| has been called;
-  //   - there is no pending read;
-  //   - there is no pending write.
-  class RawChannelIOHandler : public base::MessageLoopForIO::IOHandler {
-   public:
-    RawChannelIOHandler(RawChannelWin* owner,
-                        embedder::ScopedPlatformHandle handle);
-
-    HANDLE handle() const { return handle_.get().handle; }
-
-    // The following methods are only called by the owner on the I/O thread.
-    bool pending_read() const;
-    base::MessageLoopForIO::IOContext* read_context();
-    // Instructs the object to wait for an |OnIOCompleted()| notification.
-    void OnPendingReadStarted();
-
-    // The following methods are only called by the owner under
-    // |owner_->write_lock()|.
-    bool pending_write_no_lock() const;
-    base::MessageLoopForIO::IOContext* write_context_no_lock();
-    // Instructs the object to wait for an |OnIOCompleted()| notification.
-    void OnPendingWriteStartedNoLock();
-
-    // |base::MessageLoopForIO::IOHandler| implementation:
-    // Must be called on the I/O thread. It could be called before or after
-    // detached from the owner.
-    virtual void OnIOCompleted(base::MessageLoopForIO::IOContext* context,
-                               DWORD bytes_transferred,
-                               DWORD error) override;
-
-    // Must be called on the I/O thread under |owner_->write_lock()|.
-    // After this call, the owner must not make any further calls on this
-    // object, and therefore the object is used on the I/O thread exclusively
-    // (if it stays alive).
-    void DetachFromOwnerNoLock(scoped_ptr<ReadBuffer> read_buffer,
-                               scoped_ptr<WriteBuffer> write_buffer);
-
-   private:
-    virtual ~RawChannelIOHandler();
-
-    // Returns true if |owner_| has been reset and there is not pending read or
-    // write.
-    // Must be called on the I/O thread.
-    bool ShouldSelfDestruct() const;
-
-    // Must be called on the I/O thread. It may be called before or after
-    // detaching from the owner.
-    void OnReadCompleted(DWORD bytes_read, DWORD error);
-    // Must be called on the I/O thread. It may be called before or after
-    // detaching from the owner.
-    void OnWriteCompleted(DWORD bytes_written, DWORD error);
-
-    embedder::ScopedPlatformHandle handle_;
-
-    // |owner_| is reset on the I/O thread under |owner_->write_lock()|.
-    // Therefore, it may be used on any thread under lock; or on the I/O thread
-    // without locking.
-    RawChannelWin* owner_;
-
-    // The following members must be used on the I/O thread.
-    scoped_ptr<ReadBuffer> preserved_read_buffer_after_detach_;
-    scoped_ptr<WriteBuffer> preserved_write_buffer_after_detach_;
-    bool suppress_self_destruct_;
-
-    bool pending_read_;
-    base::MessageLoopForIO::IOContext read_context_;
-
-    // The following members must be used under |owner_->write_lock()| while the
-    // object is still attached to the owner, and only on the I/O thread
-    // afterwards.
-    bool pending_write_;
-    base::MessageLoopForIO::IOContext write_context_;
-
-    DISALLOW_COPY_AND_ASSIGN(RawChannelIOHandler);
-  };
-
-  // |RawChannel| private methods:
-  virtual IOResult Read(size_t* bytes_read) override;
-  virtual IOResult ScheduleRead() override;
-  virtual embedder::ScopedPlatformHandleVectorPtr GetReadPlatformHandles(
-      size_t num_platform_handles,
-      const void* platform_handle_table) override;
-  virtual IOResult WriteNoLock(size_t* platform_handles_written,
-                               size_t* bytes_written) override;
-  virtual IOResult ScheduleWriteNoLock() override;
-  virtual bool OnInit() override;
-  virtual void OnShutdownNoLock(scoped_ptr<ReadBuffer> read_buffer,
-                                scoped_ptr<WriteBuffer> write_buffer) override;
-
-  // Passed to |io_handler_| during initialization.
-  embedder::ScopedPlatformHandle handle_;
-
-  RawChannelIOHandler* io_handler_;
-
-  const bool skip_completion_port_on_success_;
-
-  DISALLOW_COPY_AND_ASSIGN(RawChannelWin);
-};
-
-RawChannelWin::RawChannelIOHandler::RawChannelIOHandler(
-    RawChannelWin* owner,
-    embedder::ScopedPlatformHandle handle)
-    : handle_(handle.Pass()),
-      owner_(owner),
-      suppress_self_destruct_(false),
-      pending_read_(false),
-      pending_write_(false) {
-  memset(&read_context_.overlapped, 0, sizeof(read_context_.overlapped));
-  read_context_.handler = this;
-  memset(&write_context_.overlapped, 0, sizeof(write_context_.overlapped));
-  write_context_.handler = this;
-
-  owner_->message_loop_for_io()->RegisterIOHandler(handle_.get().handle, this);
-}
-
-RawChannelWin::RawChannelIOHandler::~RawChannelIOHandler() {
-  DCHECK(ShouldSelfDestruct());
-}
-
-bool RawChannelWin::RawChannelIOHandler::pending_read() const {
-  DCHECK(owner_);
-  DCHECK_EQ(base::MessageLoop::current(), owner_->message_loop_for_io());
-  return pending_read_;
-}
-
-base::MessageLoopForIO::IOContext*
-RawChannelWin::RawChannelIOHandler::read_context() {
-  DCHECK(owner_);
-  DCHECK_EQ(base::MessageLoop::current(), owner_->message_loop_for_io());
-  return &read_context_;
-}
-
-void RawChannelWin::RawChannelIOHandler::OnPendingReadStarted() {
-  DCHECK(owner_);
-  DCHECK_EQ(base::MessageLoop::current(), owner_->message_loop_for_io());
-  DCHECK(!pending_read_);
-  pending_read_ = true;
-}
-
-bool RawChannelWin::RawChannelIOHandler::pending_write_no_lock() const {
-  DCHECK(owner_);
-  owner_->write_lock().AssertAcquired();
-  return pending_write_;
-}
-
-base::MessageLoopForIO::IOContext*
-RawChannelWin::RawChannelIOHandler::write_context_no_lock() {
-  DCHECK(owner_);
-  owner_->write_lock().AssertAcquired();
-  return &write_context_;
-}
-
-void RawChannelWin::RawChannelIOHandler::OnPendingWriteStartedNoLock() {
-  DCHECK(owner_);
-  owner_->write_lock().AssertAcquired();
-  DCHECK(!pending_write_);
-  pending_write_ = true;
-}
-
-void RawChannelWin::RawChannelIOHandler::OnIOCompleted(
-    base::MessageLoopForIO::IOContext* context,
-    DWORD bytes_transferred,
-    DWORD error) {
-  DCHECK(!owner_ ||
-         base::MessageLoop::current() == owner_->message_loop_for_io());
-
-  {
-    // Suppress self-destruction inside |OnReadCompleted()|, etc. (in case they
-    // result in a call to |Shutdown()|).
-    base::AutoReset<bool> resetter(&suppress_self_destruct_, true);
-
-    if (context == &read_context_)
-      OnReadCompleted(bytes_transferred, error);
-    else if (context == &write_context_)
-      OnWriteCompleted(bytes_transferred, error);
-    else
-      NOTREACHED();
-  }
-
-  if (ShouldSelfDestruct())
-    delete this;
-}
-
-void RawChannelWin::RawChannelIOHandler::DetachFromOwnerNoLock(
-    scoped_ptr<ReadBuffer> read_buffer,
-    scoped_ptr<WriteBuffer> write_buffer) {
-  DCHECK(owner_);
-  DCHECK_EQ(base::MessageLoop::current(), owner_->message_loop_for_io());
-  owner_->write_lock().AssertAcquired();
-
-  // If read/write is pending, we have to retain the corresponding buffer.
-  if (pending_read_)
-    preserved_read_buffer_after_detach_ = read_buffer.Pass();
-  if (pending_write_)
-    preserved_write_buffer_after_detach_ = write_buffer.Pass();
-
-  owner_ = nullptr;
-  if (ShouldSelfDestruct())
-    delete this;
-}
-
-bool RawChannelWin::RawChannelIOHandler::ShouldSelfDestruct() const {
-  if (owner_ || suppress_self_destruct_)
-    return false;
-
-  // Note: Detached, hence no lock needed for |pending_write_|.
-  return !pending_read_ && !pending_write_;
-}
-
-void RawChannelWin::RawChannelIOHandler::OnReadCompleted(DWORD bytes_read,
-                                                         DWORD error) {
-  DCHECK(!owner_ ||
-         base::MessageLoop::current() == owner_->message_loop_for_io());
-  DCHECK(suppress_self_destruct_);
-
-  CHECK(pending_read_);
-  pending_read_ = false;
-  if (!owner_)
-    return;
-
-  if (error == ERROR_SUCCESS) {
-    DCHECK_GT(bytes_read, 0u);
-    owner_->OnReadCompleted(IO_SUCCEEDED, bytes_read);
-  } else if (error == ERROR_BROKEN_PIPE) {
-    DCHECK_EQ(bytes_read, 0u);
-    owner_->OnReadCompleted(IO_FAILED_SHUTDOWN, 0);
-  } else {
-    DCHECK_EQ(bytes_read, 0u);
-    LOG(WARNING) << "ReadFile: " << logging::SystemErrorCodeToString(error);
-    owner_->OnReadCompleted(IO_FAILED_UNKNOWN, 0);
-  }
-}
-
-void RawChannelWin::RawChannelIOHandler::OnWriteCompleted(DWORD bytes_written,
-                                                          DWORD error) {
-  DCHECK(!owner_ ||
-         base::MessageLoop::current() == owner_->message_loop_for_io());
-  DCHECK(suppress_self_destruct_);
-
-  if (!owner_) {
-    // No lock needed.
-    CHECK(pending_write_);
-    pending_write_ = false;
-    return;
-  }
-
-  {
-    base::AutoLock locker(owner_->write_lock());
-    CHECK(pending_write_);
-    pending_write_ = false;
-  }
-
-  if (error == ERROR_SUCCESS) {
-    owner_->OnWriteCompleted(IO_SUCCEEDED, 0, bytes_written);
-  } else if (error == ERROR_BROKEN_PIPE) {
-    owner_->OnWriteCompleted(IO_FAILED_SHUTDOWN, 0, 0);
-  } else {
-    LOG(WARNING) << "WriteFile: " << logging::SystemErrorCodeToString(error);
-    owner_->OnWriteCompleted(IO_FAILED_UNKNOWN, 0, 0);
-  }
-}
-
-RawChannelWin::RawChannelWin(embedder::ScopedPlatformHandle handle)
-    : handle_(handle.Pass()),
-      io_handler_(nullptr),
-      skip_completion_port_on_success_(
-          g_vista_or_higher_functions.Get().is_vista_or_higher()) {
-  DCHECK(handle_.is_valid());
-}
-
-RawChannelWin::~RawChannelWin() {
-  DCHECK(!io_handler_);
-}
-
-size_t RawChannelWin::GetSerializedPlatformHandleSize() const {
-  // TODO(vtl): Implement.
-  return 0;
-}
-
-RawChannel::IOResult RawChannelWin::Read(size_t* bytes_read) {
-  DCHECK_EQ(base::MessageLoop::current(), message_loop_for_io());
-  DCHECK(io_handler_);
-  DCHECK(!io_handler_->pending_read());
-
-  char* buffer = nullptr;
-  size_t bytes_to_read = 0;
-  read_buffer()->GetBuffer(&buffer, &bytes_to_read);
-
-  BOOL result = ReadFile(io_handler_->handle(),
-                         buffer,
-                         static_cast<DWORD>(bytes_to_read),
-                         nullptr,
-                         &io_handler_->read_context()->overlapped);
-  if (!result) {
-    DWORD error = GetLastError();
-    if (error == ERROR_BROKEN_PIPE)
-      return IO_FAILED_SHUTDOWN;
-    if (error != ERROR_IO_PENDING) {
-      LOG(WARNING) << "ReadFile: " << logging::SystemErrorCodeToString(error);
-      return IO_FAILED_UNKNOWN;
-    }
-  }
-
-  if (result && skip_completion_port_on_success_) {
-    DWORD bytes_read_dword = 0;
-    BOOL get_size_result =
-        GetOverlappedResult(io_handler_->handle(),
-                            &io_handler_->read_context()->overlapped,
-                            &bytes_read_dword,
-                            FALSE);
-    DPCHECK(get_size_result);
-    *bytes_read = bytes_read_dword;
-    return IO_SUCCEEDED;
-  }
-
-  // If the read is pending or the read has succeeded but we don't skip
-  // completion port on success, instruct |io_handler_| to wait for the
-  // completion packet.
-  //
-  // TODO(yzshen): It seems there isn't document saying that all error cases
-  // (other than ERROR_IO_PENDING) are guaranteed to *not* queue a completion
-  // packet. If we do get one for errors, |RawChannelIOHandler::OnIOCompleted()|
-  // will crash so we will learn about it.
-
-  io_handler_->OnPendingReadStarted();
-  return IO_PENDING;
-}
-
-RawChannel::IOResult RawChannelWin::ScheduleRead() {
-  DCHECK_EQ(base::MessageLoop::current(), message_loop_for_io());
-  DCHECK(io_handler_);
-  DCHECK(!io_handler_->pending_read());
-
-  size_t bytes_read = 0;
-  IOResult io_result = Read(&bytes_read);
-  if (io_result == IO_SUCCEEDED) {
-    DCHECK(skip_completion_port_on_success_);
-
-    // We have finished reading successfully. Queue a notification manually.
-    io_handler_->OnPendingReadStarted();
-    // |io_handler_| won't go away before the task is run, so it is safe to use
-    // |base::Unretained()|.
-    message_loop_for_io()->PostTask(
-        FROM_HERE,
-        base::Bind(&RawChannelIOHandler::OnIOCompleted,
-                   base::Unretained(io_handler_),
-                   base::Unretained(io_handler_->read_context()),
-                   static_cast<DWORD>(bytes_read),
-                   ERROR_SUCCESS));
-    return IO_PENDING;
-  }
-
-  return io_result;
-}
-
-embedder::ScopedPlatformHandleVectorPtr RawChannelWin::GetReadPlatformHandles(
-    size_t num_platform_handles,
-    const void* platform_handle_table) {
-  // TODO(vtl): Implement.
-  NOTIMPLEMENTED();
-  return embedder::ScopedPlatformHandleVectorPtr();
-}
-
-RawChannel::IOResult RawChannelWin::WriteNoLock(
-    size_t* platform_handles_written,
-    size_t* bytes_written) {
-  write_lock().AssertAcquired();
-
-  DCHECK(io_handler_);
-  DCHECK(!io_handler_->pending_write_no_lock());
-
-  if (write_buffer_no_lock()->HavePlatformHandlesToSend()) {
-    // TODO(vtl): Implement.
-    NOTIMPLEMENTED();
-  }
-
-  std::vector<WriteBuffer::Buffer> buffers;
-  write_buffer_no_lock()->GetBuffers(&buffers);
-  DCHECK(!buffers.empty());
-
-  // TODO(yzshen): Handle multi-segment writes more efficiently.
-  DWORD bytes_written_dword = 0;
-  BOOL result = WriteFile(io_handler_->handle(),
-                          buffers[0].addr,
-                          static_cast<DWORD>(buffers[0].size),
-                          &bytes_written_dword,
-                          &io_handler_->write_context_no_lock()->overlapped);
-  if (!result) {
-    DWORD error = GetLastError();
-    if (error == ERROR_BROKEN_PIPE)
-      return IO_FAILED_SHUTDOWN;
-    if (error != ERROR_IO_PENDING) {
-      LOG(WARNING) << "WriteFile: " << logging::SystemErrorCodeToString(error);
-      return IO_FAILED_UNKNOWN;
-    }
-  }
-
-  if (result && skip_completion_port_on_success_) {
-    *platform_handles_written = 0;
-    *bytes_written = bytes_written_dword;
-    return IO_SUCCEEDED;
-  }
-
-  // If the write is pending or the write has succeeded but we don't skip
-  // completion port on success, instruct |io_handler_| to wait for the
-  // completion packet.
-  //
-  // TODO(yzshen): it seems there isn't document saying that all error cases
-  // (other than ERROR_IO_PENDING) are guaranteed to *not* queue a completion
-  // packet. If we do get one for errors, |RawChannelIOHandler::OnIOCompleted()|
-  // will crash so we will learn about it.
-
-  io_handler_->OnPendingWriteStartedNoLock();
-  return IO_PENDING;
-}
-
-RawChannel::IOResult RawChannelWin::ScheduleWriteNoLock() {
-  write_lock().AssertAcquired();
-
-  DCHECK(io_handler_);
-  DCHECK(!io_handler_->pending_write_no_lock());
-
-  // TODO(vtl): Do something with |platform_handles_written|.
-  size_t platform_handles_written = 0;
-  size_t bytes_written = 0;
-  IOResult io_result = WriteNoLock(&platform_handles_written, &bytes_written);
-  if (io_result == IO_SUCCEEDED) {
-    DCHECK(skip_completion_port_on_success_);
-
-    // We have finished writing successfully. Queue a notification manually.
-    io_handler_->OnPendingWriteStartedNoLock();
-    // |io_handler_| won't go away before that task is run, so it is safe to use
-    // |base::Unretained()|.
-    message_loop_for_io()->PostTask(
-        FROM_HERE,
-        base::Bind(&RawChannelIOHandler::OnIOCompleted,
-                   base::Unretained(io_handler_),
-                   base::Unretained(io_handler_->write_context_no_lock()),
-                   static_cast<DWORD>(bytes_written),
-                   ERROR_SUCCESS));
-    return IO_PENDING;
-  }
-
-  return io_result;
-}
-
-bool RawChannelWin::OnInit() {
-  DCHECK_EQ(base::MessageLoop::current(), message_loop_for_io());
-
-  DCHECK(handle_.is_valid());
-  if (skip_completion_port_on_success_ &&
-      !g_vista_or_higher_functions.Get().SetFileCompletionNotificationModes(
-          handle_.get().handle, FILE_SKIP_COMPLETION_PORT_ON_SUCCESS)) {
-    return false;
-  }
-
-  DCHECK(!io_handler_);
-  io_handler_ = new RawChannelIOHandler(this, handle_.Pass());
-
-  return true;
-}
-
-void RawChannelWin::OnShutdownNoLock(scoped_ptr<ReadBuffer> read_buffer,
-                                     scoped_ptr<WriteBuffer> write_buffer) {
-  DCHECK_EQ(base::MessageLoop::current(), message_loop_for_io());
-  DCHECK(io_handler_);
-
-  write_lock().AssertAcquired();
-
-  if (io_handler_->pending_read() || io_handler_->pending_write_no_lock()) {
-    // |io_handler_| will be alive until pending read/write (if any) completes.
-    // Call |CancelIoEx()| or |CancelIo()| so that resources can be freed up as
-    // soon as possible.
-    // Note: |CancelIo()| only cancels read/write requests started from this
-    // thread.
-    if (g_vista_or_higher_functions.Get().is_vista_or_higher()) {
-      g_vista_or_higher_functions.Get().CancelIoEx(io_handler_->handle(),
-                                                   nullptr);
-    } else {
-      CancelIo(io_handler_->handle());
-    }
-  }
-
-  io_handler_->DetachFromOwnerNoLock(read_buffer.Pass(), write_buffer.Pass());
-  io_handler_ = nullptr;
-}
-
-}  // namespace
-
-// -----------------------------------------------------------------------------
-
-// Static factory method declared in raw_channel.h.
-// static
-scoped_ptr<RawChannel> RawChannel::Create(
-    embedder::ScopedPlatformHandle handle) {
-  return make_scoped_ptr(new RawChannelWin(handle.Pass()));
-}
-
-}  // namespace system
-}  // namespace mojo