Make the fuchsia mojo/public repo the source of truth.

mojo/public/cpp/bindings/lib/router.cc

-// 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/public/cpp/bindings/lib/router.h"
-
-#include <string>
-#include <utility>
-
-#include "mojo/public/cpp/bindings/message_validator.h"
-#include "mojo/public/cpp/environment/logging.h"
-
-namespace mojo {
-namespace internal {
-
-// ----------------------------------------------------------------------------
-
-class ResponderThunk : public MessageReceiverWithStatus {
- public:
-  explicit ResponderThunk(const SharedData<Router*>& router)
-      : router_(router), accept_was_invoked_(false) {}
-  ~ResponderThunk() override {
-    if (!accept_was_invoked_) {
-      // The Mojo application handled a message that was expecting a response
-      // but did not send a response.
-      Router* router = router_.value();
-      if (router) {
-        // We close the pipe here as a way of signaling to the calling
-        // application that an error condition occurred. Without this the
-        // calling application would have no way of knowing it should stop
-        // waiting for a response.
-        router->CloseMessagePipe();
-      }
-    }
-  }
-
-  // MessageReceiver implementation:
-  bool Accept(Message* message) override {
-    accept_was_invoked_ = true;
-    MOJO_DCHECK(message->has_flag(kMessageIsResponse));
-
-    bool result = false;
-
-    Router* router = router_.value();
-    if (router)
-      result = router->Accept(message);
-
-    return result;
-  }
-
-  // MessageReceiverWithStatus implementation:
-  bool IsValid() override {
-    Router* router = router_.value();
-    return router && !router->encountered_error() && router->is_valid();
-  }
-
- private:
-  SharedData<Router*> router_;
-  bool accept_was_invoked_;
-};
-
-// ----------------------------------------------------------------------------
-
-Router::HandleIncomingMessageThunk::HandleIncomingMessageThunk(Router* router)
-    : router_(router) {}
-
-Router::HandleIncomingMessageThunk::~HandleIncomingMessageThunk() {}
-
-bool Router::HandleIncomingMessageThunk::Accept(Message* message) {
-  return router_->HandleIncomingMessage(message);
-}
-
-// ----------------------------------------------------------------------------
-
-Router::Router(ScopedMessagePipeHandle message_pipe,
-               MessageValidatorList validators,
-               const MojoAsyncWaiter* waiter)
-    : thunk_(this),
-      validators_(std::move(validators)),
-      connector_(message_pipe.Pass(), waiter),
-      weak_self_(this),
-      incoming_receiver_(nullptr),
-      next_request_id_(0),
-      testing_mode_(false) {
-  // This receiver thunk redirects to Router::HandleIncomingMessage.
-  connector_.set_incoming_receiver(&thunk_);
-}
-
-Router::~Router() {
-  weak_self_.set_value(nullptr);
-
-  for (ResponderMap::const_iterator i = responders_.begin();
-       i != responders_.end();
-       ++i) {
-    delete i->second;
-  }
-}
-
-bool Router::Accept(Message* message) {
-  MOJO_DCHECK(!message->has_flag(kMessageExpectsResponse));
-  return connector_.Accept(message);
-}
-
-bool Router::AcceptWithResponder(Message* message, MessageReceiver* responder) {
-  MOJO_DCHECK(message->has_flag(kMessageExpectsResponse));
-
-  // Reserve 0 in case we want it to convey special meaning in the future.
-  uint64_t request_id = next_request_id_++;
-  if (request_id == 0)
-    request_id = next_request_id_++;
-
-  message->set_request_id(request_id);
-  if (!connector_.Accept(message))
-    return false;
-
-  // We assume ownership of |responder|.
-  responders_[request_id] = responder;
-  return true;
-}
-
-void Router::EnableTestingMode() {
-  testing_mode_ = true;
-  connector_.set_enforce_errors_from_incoming_receiver(false);
-}
-
-bool Router::HandleIncomingMessage(Message* message) {
-  std::string* err = nullptr;
-#ifndef NDEBUG
-  std::string err2;
-  err = &err2;
-#endif
-
-  ValidationError result = RunValidatorsOnMessage(validators_, message, err);
-  if (result != ValidationError::NONE)
-    return false;
-
-  if (message->has_flag(kMessageExpectsResponse)) {
-    if (incoming_receiver_) {
-      MessageReceiverWithStatus* responder = new ResponderThunk(weak_self_);
-      bool ok = incoming_receiver_->AcceptWithResponder(message, responder);
-      if (!ok)
-        delete responder;
-      return ok;
-    }
-
-    // If we receive a request expecting a response when the client is not
-    // listening, then we have no choice but to tear down the pipe.
-    connector_.CloseMessagePipe();
-  } else if (message->has_flag(kMessageIsResponse)) {
-    uint64_t request_id = message->request_id();
-    ResponderMap::iterator it = responders_.find(request_id);
-    if (it == responders_.end()) {
-      MOJO_DCHECK(testing_mode_);
-      return false;
-    }
-    MessageReceiver* responder = it->second;
-    responders_.erase(it);
-    bool ok = responder->Accept(message);
-    delete responder;
-    return ok;
-  } else {
-    if (incoming_receiver_)
-      return incoming_receiver_->Accept(message);
-    // OK to drop message on the floor.
-  }
-
-  return false;
-}
-
-// ----------------------------------------------------------------------------
-
-}  // namespace internal
-}  // namespace mojo