Tizen 2.0 Releasesubmit/tizen_2.0/20130215.192206accepted/tizen_2.0/20130215.202315tizen_2.0

1 files changed, 430 insertions, 0 deletions

diff --git a/ipc/ipc_channel_win.cc b/ipc/ipc_channel_win.cc
new file mode 100644
index 000000000000..3a85a1651fb4
--- /dev/null
+++ b/ipc/ipc_channel_win.cc
@@ -0,0 +1,430 @@
+// Copyright (c) 2011 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 "ipc/ipc_channel_win.h"
+
+#include <windows.h>
+
+#include "base/auto_reset.h"
+#include "base/compiler_specific.h"
+#include "base/logging.h"
+#include "base/threading/non_thread_safe.h"
+#include "base/utf_string_conversions.h"
+#include "base/win/scoped_handle.h"
+#include "ipc/ipc_logging.h"
+#include "ipc/ipc_message_utils.h"
+
+namespace IPC {
+
+Channel::ChannelImpl::State::State(ChannelImpl* channel) : is_pending(false) {
+  memset(&context.overlapped, 0, sizeof(context.overlapped));
+  context.handler = channel;
+}
+
+Channel::ChannelImpl::State::~State() {
+  COMPILE_ASSERT(!offsetof(Channel::ChannelImpl::State, context),
+                 starts_with_io_context);
+}
+
+Channel::ChannelImpl::ChannelImpl(const IPC::ChannelHandle &channel_handle,
+                                  Mode mode, Listener* listener)
+    : ALLOW_THIS_IN_INITIALIZER_LIST(input_state_(this)),
+      ALLOW_THIS_IN_INITIALIZER_LIST(output_state_(this)),
+      pipe_(INVALID_HANDLE_VALUE),
+      listener_(listener),
+      waiting_connect_(mode & MODE_SERVER_FLAG),
+      processing_incoming_(false),
+      ALLOW_THIS_IN_INITIALIZER_LIST(factory_(this)) {
+  CreatePipe(channel_handle, mode);
+}
+
+Channel::ChannelImpl::~ChannelImpl() {
+  Close();
+}
+
+void Channel::ChannelImpl::Close() {
+  if (thread_check_.get()) {
+    DCHECK(thread_check_->CalledOnValidThread());
+  }
+
+  if (input_state_.is_pending || output_state_.is_pending)
+    CancelIo(pipe_);
+
+  // Closing the handle at this point prevents us from issuing more requests
+  // form OnIOCompleted().
+  if (pipe_ != INVALID_HANDLE_VALUE) {
+    CloseHandle(pipe_);
+    pipe_ = INVALID_HANDLE_VALUE;
+  }
+
+  // Make sure all IO has completed.
+  base::Time start = base::Time::Now();
+  while (input_state_.is_pending || output_state_.is_pending) {
+    MessageLoopForIO::current()->WaitForIOCompletion(INFINITE, this);
+  }
+
+  while (!output_queue_.empty()) {
+    Message* m = output_queue_.front();
+    output_queue_.pop();
+    delete m;
+  }
+}
+
+bool Channel::ChannelImpl::Send(Message* message) {
+  DCHECK(thread_check_->CalledOnValidThread());
+  DVLOG(2) << "sending message @" << message << " on channel @" << this
+           << " with type " << message->type()
+           << " (" << output_queue_.size() << " in queue)";
+
+#ifdef IPC_MESSAGE_LOG_ENABLED
+  Logging::GetInstance()->OnSendMessage(message, "");
+#endif
+
+  output_queue_.push(message);
+  // ensure waiting to write
+  if (!waiting_connect_) {
+    if (!output_state_.is_pending) {
+      if (!ProcessOutgoingMessages(NULL, 0))
+        return false;
+    }
+  }
+
+  return true;
+}
+
+// static
+bool Channel::ChannelImpl::IsNamedServerInitialized(
+    const std::string& channel_id) {
+  if (WaitNamedPipe(PipeName(channel_id).c_str(), 1))
+    return true;
+  // If ERROR_SEM_TIMEOUT occurred, the pipe exists but is handling another
+  // connection.
+  return GetLastError() == ERROR_SEM_TIMEOUT;
+}
+
+// static
+const std::wstring Channel::ChannelImpl::PipeName(
+    const std::string& channel_id) {
+  std::string name("\\\\.\\pipe\\chrome.");
+  return ASCIIToWide(name.append(channel_id));
+}
+
+bool Channel::ChannelImpl::CreatePipe(const IPC::ChannelHandle &channel_handle,
+                                      Mode mode) {
+  DCHECK_EQ(INVALID_HANDLE_VALUE, pipe_);
+  const std::wstring pipe_name = PipeName(channel_handle.name);
+  if (mode & MODE_SERVER_FLAG) {
+    pipe_ = CreateNamedPipeW(pipe_name.c_str(),
+                             PIPE_ACCESS_DUPLEX | FILE_FLAG_OVERLAPPED |
+                              FILE_FLAG_FIRST_PIPE_INSTANCE,
+                             PIPE_TYPE_BYTE | PIPE_READMODE_BYTE,
+                             1,
+                             Channel::kReadBufferSize,
+                             Channel::kReadBufferSize,
+                             5000,
+                             NULL);
+  } else if (mode & MODE_CLIENT_FLAG) {
+    pipe_ = CreateFileW(pipe_name.c_str(),
+                        GENERIC_READ | GENERIC_WRITE,
+                        0,
+                        NULL,
+                        OPEN_EXISTING,
+                        SECURITY_SQOS_PRESENT | SECURITY_IDENTIFICATION |
+                            FILE_FLAG_OVERLAPPED,
+                        NULL);
+  } else {
+    NOTREACHED();
+  }
+  if (pipe_ == INVALID_HANDLE_VALUE) {
+    // If this process is being closed, the pipe may be gone already.
+    LOG(WARNING) << "Unable to create pipe \"" << pipe_name <<
+                    "\" in " << (mode == 0 ? "server" : "client")
+                    << " mode. Error :" << GetLastError();
+    return false;
+  }
+
+  // Create the Hello message to be sent when Connect is called
+  scoped_ptr<Message> m(new Message(MSG_ROUTING_NONE,
+                                    HELLO_MESSAGE_TYPE,
+                                    IPC::Message::PRIORITY_NORMAL));
+  if (!m->WriteInt(GetCurrentProcessId())) {
+    CloseHandle(pipe_);
+    pipe_ = INVALID_HANDLE_VALUE;
+    return false;
+  }
+
+  output_queue_.push(m.release());
+  return true;
+}
+
+bool Channel::ChannelImpl::Connect() {
+  DLOG_IF(WARNING, thread_check_.get()) << "Connect called more than once";
+
+  if (!thread_check_.get())
+    thread_check_.reset(new base::NonThreadSafe());
+
+  if (pipe_ == INVALID_HANDLE_VALUE)
+    return false;
+
+  MessageLoopForIO::current()->RegisterIOHandler(pipe_, this);
+
+  // Check to see if there is a client connected to our pipe...
+  if (waiting_connect_)
+    ProcessConnection();
+
+  if (!input_state_.is_pending) {
+    // Complete setup asynchronously. By not setting input_state_.is_pending
+    // to true, we indicate to OnIOCompleted that this is the special
+    // initialization signal.
+    MessageLoopForIO::current()->PostTask(FROM_HERE, factory_.NewRunnableMethod(
+        &Channel::ChannelImpl::OnIOCompleted, &input_state_.context, 0, 0));
+  }
+
+  if (!waiting_connect_)
+    ProcessOutgoingMessages(NULL, 0);
+  return true;
+}
+
+bool Channel::ChannelImpl::ProcessConnection() {
+  DCHECK(thread_check_->CalledOnValidThread());
+  if (input_state_.is_pending)
+    input_state_.is_pending = false;
+
+  // Do we have a client connected to our pipe?
+  if (INVALID_HANDLE_VALUE == pipe_)
+    return false;
+
+  BOOL ok = ConnectNamedPipe(pipe_, &input_state_.context.overlapped);
+
+  DWORD err = GetLastError();
+  if (ok) {
+    // Uhm, the API documentation says that this function should never
+    // return success when used in overlapped mode.
+    NOTREACHED();
+    return false;
+  }
+
+  switch (err) {
+  case ERROR_IO_PENDING:
+    input_state_.is_pending = true;
+    break;
+  case ERROR_PIPE_CONNECTED:
+    waiting_connect_ = false;
+    break;
+  case ERROR_NO_DATA:
+    // The pipe is being closed.
+    return false;
+  default:
+    NOTREACHED();
+    return false;
+  }
+
+  return true;
+}
+
+bool Channel::ChannelImpl::ProcessIncomingMessages(
+    MessageLoopForIO::IOContext* context,
+    DWORD bytes_read) {
+  DCHECK(thread_check_->CalledOnValidThread());
+  if (input_state_.is_pending) {
+    input_state_.is_pending = false;
+    DCHECK(context);
+
+    if (!context || !bytes_read)
+      return false;
+  } else {
+    // This happens at channel initialization.
+    DCHECK(!bytes_read && context == &input_state_.context);
+  }
+
+  for (;;) {
+    if (bytes_read == 0) {
+      if (INVALID_HANDLE_VALUE == pipe_)
+        return false;
+
+      // Read from pipe...
+      BOOL ok = ReadFile(pipe_,
+                         input_buf_,
+                         Channel::kReadBufferSize,
+                         &bytes_read,
+                         &input_state_.context.overlapped);
+      if (!ok) {
+        DWORD err = GetLastError();
+        if (err == ERROR_IO_PENDING) {
+          input_state_.is_pending = true;
+          return true;
+        }
+        LOG(ERROR) << "pipe error: " << err;
+        return false;
+      }
+      input_state_.is_pending = true;
+      return true;
+    }
+    DCHECK(bytes_read);
+
+    // Process messages from input buffer.
+
+    const char* p, *end;
+    if (input_overflow_buf_.empty()) {
+      p = input_buf_;
+      end = p + bytes_read;
+    } else {
+      if (input_overflow_buf_.size() > (kMaximumMessageSize - bytes_read)) {
+        input_overflow_buf_.clear();
+        LOG(ERROR) << "IPC message is too big";
+        return false;
+      }
+      input_overflow_buf_.append(input_buf_, bytes_read);
+      p = input_overflow_buf_.data();
+      end = p + input_overflow_buf_.size();
+    }
+
+    while (p < end) {
+      const char* message_tail = Message::FindNext(p, end);
+      if (message_tail) {
+        int len = static_cast<int>(message_tail - p);
+        const Message m(p, len);
+        DVLOG(2) << "received message on channel @" << this
+                 << " with type " << m.type();
+        if (m.routing_id() == MSG_ROUTING_NONE &&
+            m.type() == HELLO_MESSAGE_TYPE) {
+          // The Hello message contains only the process id.
+          listener_->OnChannelConnected(MessageIterator(m).NextInt());
+        } else {
+          listener_->OnMessageReceived(m);
+        }
+        p = message_tail;
+      } else {
+        // Last message is partial.
+        break;
+      }
+    }
+    input_overflow_buf_.assign(p, end - p);
+
+    bytes_read = 0;  // Get more data.
+  }
+
+  return true;
+}
+
+bool Channel::ChannelImpl::ProcessOutgoingMessages(
+    MessageLoopForIO::IOContext* context,
+    DWORD bytes_written) {
+  DCHECK(!waiting_connect_);  // Why are we trying to send messages if there's
+                              // no connection?
+  DCHECK(thread_check_->CalledOnValidThread());
+
+  if (output_state_.is_pending) {
+    DCHECK(context);
+    output_state_.is_pending = false;
+    if (!context || bytes_written == 0) {
+      DWORD err = GetLastError();
+      LOG(ERROR) << "pipe error: " << err;
+      return false;
+    }
+    // Message was sent.
+    DCHECK(!output_queue_.empty());
+    Message* m = output_queue_.front();
+    output_queue_.pop();
+    delete m;
+  }
+
+  if (output_queue_.empty())
+    return true;
+
+  if (INVALID_HANDLE_VALUE == pipe_)
+    return false;
+
+  // Write to pipe...
+  Message* m = output_queue_.front();
+  DCHECK(m->size() <= INT_MAX);
+  BOOL ok = WriteFile(pipe_,
+                      m->data(),
+                      static_cast<int>(m->size()),
+                      &bytes_written,
+                      &output_state_.context.overlapped);
+  if (!ok) {
+    DWORD err = GetLastError();
+    if (err == ERROR_IO_PENDING) {
+      output_state_.is_pending = true;
+
+      DVLOG(2) << "sent pending message @" << m << " on channel @" << this
+               << " with type " << m->type();
+
+      return true;
+    }
+    LOG(ERROR) << "pipe error: " << err;
+    return false;
+  }
+
+  DVLOG(2) << "sent message @" << m << " on channel @" << this
+           << " with type " << m->type();
+
+  output_state_.is_pending = true;
+  return true;
+}
+
+void Channel::ChannelImpl::OnIOCompleted(MessageLoopForIO::IOContext* context,
+                            DWORD bytes_transfered, DWORD error) {
+  bool ok;
+  DCHECK(thread_check_->CalledOnValidThread());
+  if (context == &input_state_.context) {
+    if (waiting_connect_) {
+      if (!ProcessConnection())
+        return;
+      // We may have some messages queued up to send...
+      if (!output_queue_.empty() && !output_state_.is_pending)
+        ProcessOutgoingMessages(NULL, 0);
+      if (input_state_.is_pending)
+        return;
+      // else, fall-through and look for incoming messages...
+    }
+    // we don't support recursion through OnMessageReceived yet!
+    DCHECK(!processing_incoming_);
+    AutoReset<bool> auto_reset_processing_incoming(&processing_incoming_, true);
+    ok = ProcessIncomingMessages(context, bytes_transfered);
+  } else {
+    DCHECK(context == &output_state_.context);
+    ok = ProcessOutgoingMessages(context, bytes_transfered);
+  }
+  if (!ok && INVALID_HANDLE_VALUE != pipe_) {
+    // We don't want to re-enter Close().
+    Close();
+    listener_->OnChannelError();
+  }
+}
+
+//------------------------------------------------------------------------------
+// Channel's methods simply call through to ChannelImpl.
+Channel::Channel(const IPC::ChannelHandle &channel_handle, Mode mode,
+                 Listener* listener)
+    : channel_impl_(new ChannelImpl(channel_handle, mode, listener)) {
+}
+
+Channel::~Channel() {
+  delete channel_impl_;
+}
+
+bool Channel::Connect() {
+  return channel_impl_->Connect();
+}
+
+void Channel::Close() {
+  channel_impl_->Close();
+}
+
+void Channel::set_listener(Listener* listener) {
+  channel_impl_->set_listener(listener);
+}
+
+bool Channel::Send(Message* message) {
+  return channel_impl_->Send(message);
+}
+
+// static
+bool Channel::IsNamedServerInitialized(const std::string& channel_id) {
+  return ChannelImpl::IsNamedServerInitialized(channel_id);
+}
+
+}  // namespace IPC