[mojo] Delete third_party/mojo

third_party/mojo/src/mojo/edk/system/remote_producer_data_pipe_impl.cc

Index: third_party/mojo/src/mojo/edk/system/remote_producer_data_pipe_impl.cc
diff --git a/third_party/mojo/src/mojo/edk/system/remote_producer_data_pipe_impl.cc b/third_party/mojo/src/mojo/edk/system/remote_producer_data_pipe_impl.cc
deleted file mode 100644
index e47d6c13a543ea30a6834a55525b2c66d0b86f1a..0000000000000000000000000000000000000000
--- a/third_party/mojo/src/mojo/edk/system/remote_producer_data_pipe_impl.cc
+++ /dev/null
@@ -1,466 +0,0 @@
-// Copyright 2015 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 "third_party/mojo/src/mojo/edk/system/remote_producer_data_pipe_impl.h"
-
-#include <string.h>
-#include <algorithm>
-#include <utility>
-
-#include "base/logging.h"
-#include "base/memory/scoped_ptr.h"
-#include "third_party/mojo/src/mojo/edk/system/channel.h"
-#include "third_party/mojo/src/mojo/edk/system/channel_endpoint.h"
-#include "third_party/mojo/src/mojo/edk/system/configuration.h"
-#include "third_party/mojo/src/mojo/edk/system/data_pipe.h"
-#include "third_party/mojo/src/mojo/edk/system/message_in_transit.h"
-#include "third_party/mojo/src/mojo/edk/system/message_in_transit_queue.h"
-#include "third_party/mojo/src/mojo/edk/system/remote_consumer_data_pipe_impl.h"
-#include "third_party/mojo/src/mojo/edk/system/remote_data_pipe_ack.h"
-
-namespace mojo {
-namespace system {
-
-namespace {
-
-bool ValidateIncomingMessage(size_t element_num_bytes,
-                             size_t capacity_num_bytes,
-                             size_t current_num_bytes,
-                             const MessageInTransit* message) {
-  // We should only receive endpoint client messages.
-  DCHECK_EQ(message->type(), MessageInTransit::Type::ENDPOINT_CLIENT);
-
-  // But we should check the subtype; only take data messages.
-  if (message->subtype() != MessageInTransit::Subtype::ENDPOINT_CLIENT_DATA) {
-    LOG(WARNING) << "Received message of unexpected subtype: "
-                 << message->subtype();
-    return false;
-  }
-
-  const size_t num_bytes = message->num_bytes();
-  const size_t max_num_bytes = capacity_num_bytes - current_num_bytes;
-  if (num_bytes > max_num_bytes) {
-    LOG(WARNING) << "Received too much data: " << num_bytes
-                 << " bytes (maximum: " << max_num_bytes << " bytes)";
-    return false;
-  }
-
-  if (num_bytes % element_num_bytes != 0) {
-    LOG(WARNING) << "Received data not a multiple of element size: "
-                 << num_bytes << " bytes (element size: " << element_num_bytes
-                 << " bytes)";
-    return false;
-  }
-
-  return true;
-}
-
-}  // namespace
-
-RemoteProducerDataPipeImpl::RemoteProducerDataPipeImpl(
-    ChannelEndpoint* channel_endpoint)
-    : channel_endpoint_(channel_endpoint),
-      start_index_(0),
-      current_num_bytes_(0) {
-  // Note: |buffer_| is lazily allocated.
-}
-
-RemoteProducerDataPipeImpl::RemoteProducerDataPipeImpl(
-    ChannelEndpoint* channel_endpoint,
-    scoped_ptr<char, base::AlignedFreeDeleter> buffer,
-    size_t start_index,
-    size_t current_num_bytes)
-    : channel_endpoint_(channel_endpoint),
-      buffer_(std::move(buffer)),
-      start_index_(start_index),
-      current_num_bytes_(current_num_bytes) {
-  DCHECK(buffer_ || !current_num_bytes);
-}
-
-// static
-bool RemoteProducerDataPipeImpl::ProcessMessagesFromIncomingEndpoint(
-    const MojoCreateDataPipeOptions& validated_options,
-    MessageInTransitQueue* messages,
-    scoped_ptr<char, base::AlignedFreeDeleter>* buffer,
-    size_t* buffer_num_bytes) {
-  DCHECK(!*buffer);  // Not wrong, but unlikely.
-
-  const size_t element_num_bytes = validated_options.element_num_bytes;
-  const size_t capacity_num_bytes = validated_options.capacity_num_bytes;
-
-  scoped_ptr<char, base::AlignedFreeDeleter> new_buffer(static_cast<char*>(
-      base::AlignedAlloc(capacity_num_bytes,
-                         GetConfiguration().data_pipe_buffer_alignment_bytes)));
-
-  size_t current_num_bytes = 0;
-  if (messages) {
-    while (!messages->IsEmpty()) {
-      scoped_ptr<MessageInTransit> message(messages->GetMessage());
-      if (!ValidateIncomingMessage(element_num_bytes, capacity_num_bytes,
-                                   current_num_bytes, message.get())) {
-        messages->Clear();
-        return false;
-      }
-
-      memcpy(new_buffer.get() + current_num_bytes, message->bytes(),
-             message->num_bytes());
-      current_num_bytes += message->num_bytes();
-    }
-  }
-
-  *buffer = std::move(new_buffer);
-  *buffer_num_bytes = current_num_bytes;
-  return true;
-}
-
-RemoteProducerDataPipeImpl::~RemoteProducerDataPipeImpl() {
-}
-
-void RemoteProducerDataPipeImpl::ProducerClose() {
-  NOTREACHED();
-}
-
-MojoResult RemoteProducerDataPipeImpl::ProducerWriteData(
-    UserPointer<const void> /*elements*/,
-    UserPointer<uint32_t> /*num_bytes*/,
-    uint32_t /*max_num_bytes_to_write*/,
-    uint32_t /*min_num_bytes_to_write*/) {
-  NOTREACHED();
-  return MOJO_RESULT_INTERNAL;
-}
-
-MojoResult RemoteProducerDataPipeImpl::ProducerBeginWriteData(
-    UserPointer<void*> /*buffer*/,
-    UserPointer<uint32_t> /*buffer_num_bytes*/) {
-  NOTREACHED();
-  return MOJO_RESULT_INTERNAL;
-}
-
-MojoResult RemoteProducerDataPipeImpl::ProducerEndWriteData(
-    uint32_t /*num_bytes_written*/) {
-  NOTREACHED();
-  return MOJO_RESULT_INTERNAL;
-}
-
-HandleSignalsState RemoteProducerDataPipeImpl::ProducerGetHandleSignalsState()
-    const {
-  return HandleSignalsState();
-}
-
-void RemoteProducerDataPipeImpl::ProducerStartSerialize(
-    Channel* /*channel*/,
-    size_t* /*max_size*/,
-    size_t* /*max_platform_handles*/) {
-  NOTREACHED();
-}
-
-bool RemoteProducerDataPipeImpl::ProducerEndSerialize(
-    Channel* /*channel*/,
-    void* /*destination*/,
-    size_t* /*actual_size*/,
-    embedder::PlatformHandleVector* /*platform_handles*/) {
-  NOTREACHED();
-  return false;
-}
-
-void RemoteProducerDataPipeImpl::ConsumerClose() {
-  if (producer_open())
-    Disconnect();
-  current_num_bytes_ = 0;
-}
-
-MojoResult RemoteProducerDataPipeImpl::ConsumerReadData(
-    UserPointer<void> elements,
-    UserPointer<uint32_t> num_bytes,
-    uint32_t max_num_bytes_to_read,
-    uint32_t min_num_bytes_to_read,
-    bool peek) {
-  DCHECK_EQ(max_num_bytes_to_read % element_num_bytes(), 0u);
-  DCHECK_EQ(min_num_bytes_to_read % element_num_bytes(), 0u);
-  DCHECK_GT(max_num_bytes_to_read, 0u);
-
-  if (min_num_bytes_to_read > current_num_bytes_) {
-    // Don't return "should wait" since you can't wait for a specified amount of
-    // data.
-    return producer_open() ? MOJO_RESULT_OUT_OF_RANGE
-                           : MOJO_RESULT_FAILED_PRECONDITION;
-  }
-
-  size_t num_bytes_to_read =
-      std::min(static_cast<size_t>(max_num_bytes_to_read), current_num_bytes_);
-  if (num_bytes_to_read == 0) {
-    return producer_open() ? MOJO_RESULT_SHOULD_WAIT
-                           : MOJO_RESULT_FAILED_PRECONDITION;
-  }
-
-  // The amount we can read in our first |memcpy()|.
-  size_t num_bytes_to_read_first =
-      std::min(num_bytes_to_read, GetMaxNumBytesToRead());
-  elements.PutArray(buffer_.get() + start_index_, num_bytes_to_read_first);
-
-  if (num_bytes_to_read_first < num_bytes_to_read) {
-    // The "second read index" is zero.
-    elements.At(num_bytes_to_read_first)
-        .PutArray(buffer_.get(), num_bytes_to_read - num_bytes_to_read_first);
-  }
-
-  if (!peek)
-    MarkDataAsConsumed(num_bytes_to_read);
-  num_bytes.Put(static_cast<uint32_t>(num_bytes_to_read));
-  return MOJO_RESULT_OK;
-}
-
-MojoResult RemoteProducerDataPipeImpl::ConsumerDiscardData(
-    UserPointer<uint32_t> num_bytes,
-    uint32_t max_num_bytes_to_discard,
-    uint32_t min_num_bytes_to_discard) {
-  DCHECK_EQ(max_num_bytes_to_discard % element_num_bytes(), 0u);
-  DCHECK_EQ(min_num_bytes_to_discard % element_num_bytes(), 0u);
-  DCHECK_GT(max_num_bytes_to_discard, 0u);
-
-  if (min_num_bytes_to_discard > current_num_bytes_) {
-    // Don't return "should wait" since you can't wait for a specified amount of
-    // data.
-    return producer_open() ? MOJO_RESULT_OUT_OF_RANGE
-                           : MOJO_RESULT_FAILED_PRECONDITION;
-  }
-
-  // Be consistent with other operations; error if no data available.
-  if (current_num_bytes_ == 0) {
-    return producer_open() ? MOJO_RESULT_SHOULD_WAIT
-                           : MOJO_RESULT_FAILED_PRECONDITION;
-  }
-
-  size_t num_bytes_to_discard = std::min(
-      static_cast<size_t>(max_num_bytes_to_discard), current_num_bytes_);
-  MarkDataAsConsumed(num_bytes_to_discard);
-  num_bytes.Put(static_cast<uint32_t>(num_bytes_to_discard));
-  return MOJO_RESULT_OK;
-}
-
-MojoResult RemoteProducerDataPipeImpl::ConsumerQueryData(
-    UserPointer<uint32_t> num_bytes) {
-  // Note: This cast is safe, since the capacity fits into a |uint32_t|.
-  num_bytes.Put(static_cast<uint32_t>(current_num_bytes_));
-  return MOJO_RESULT_OK;
-}
-
-MojoResult RemoteProducerDataPipeImpl::ConsumerBeginReadData(
-    UserPointer<const void*> buffer,
-    UserPointer<uint32_t> buffer_num_bytes) {
-  size_t max_num_bytes_to_read = GetMaxNumBytesToRead();
-  // Don't go into a two-phase read if there's no data.
-  if (max_num_bytes_to_read == 0) {
-    return producer_open() ? MOJO_RESULT_SHOULD_WAIT
-                           : MOJO_RESULT_FAILED_PRECONDITION;
-  }
-
-  buffer.Put(buffer_.get() + start_index_);
-  buffer_num_bytes.Put(static_cast<uint32_t>(max_num_bytes_to_read));
-  set_consumer_two_phase_max_num_bytes_read(
-      static_cast<uint32_t>(max_num_bytes_to_read));
-  return MOJO_RESULT_OK;
-}
-
-MojoResult RemoteProducerDataPipeImpl::ConsumerEndReadData(
-    uint32_t num_bytes_read) {
-  DCHECK_LE(num_bytes_read, consumer_two_phase_max_num_bytes_read());
-  DCHECK_EQ(num_bytes_read % element_num_bytes(), 0u);
-  DCHECK_LE(start_index_ + num_bytes_read, capacity_num_bytes());
-  MarkDataAsConsumed(num_bytes_read);
-  set_consumer_two_phase_max_num_bytes_read(0);
-  return MOJO_RESULT_OK;
-}
-
-HandleSignalsState RemoteProducerDataPipeImpl::ConsumerGetHandleSignalsState()
-    const {
-  HandleSignalsState rv;
-  if (current_num_bytes_ > 0) {
-    if (!consumer_in_two_phase_read())
-      rv.satisfied_signals |= MOJO_HANDLE_SIGNAL_READABLE;
-    rv.satisfiable_signals |= MOJO_HANDLE_SIGNAL_READABLE;
-  } else if (producer_open()) {
-    rv.satisfiable_signals |= MOJO_HANDLE_SIGNAL_READABLE;
-  }
-  if (!producer_open())
-    rv.satisfied_signals |= MOJO_HANDLE_SIGNAL_PEER_CLOSED;
-  rv.satisfiable_signals |= MOJO_HANDLE_SIGNAL_PEER_CLOSED;
-  return rv;
-}
-
-void RemoteProducerDataPipeImpl::ConsumerStartSerialize(
-    Channel* channel,
-    size_t* max_size,
-    size_t* max_platform_handles) {
-  *max_size = sizeof(SerializedDataPipeConsumerDispatcher) +
-              channel->GetSerializedEndpointSize();
-  *max_platform_handles = 0;
-}
-
-bool RemoteProducerDataPipeImpl::ConsumerEndSerialize(
-    Channel* channel,
-    void* destination,
-    size_t* actual_size,
-    embedder::PlatformHandleVector* platform_handles) {
-  SerializedDataPipeConsumerDispatcher* s =
-      static_cast<SerializedDataPipeConsumerDispatcher*>(destination);
-  s->validated_options = validated_options();
-  void* destination_for_endpoint = static_cast<char*>(destination) +
-                                   sizeof(SerializedDataPipeConsumerDispatcher);
-
-  MessageInTransitQueue message_queue;
-  ConvertDataToMessages(buffer_.get(), &start_index_, &current_num_bytes_,
-                        &message_queue);
-
-  if (!producer_open()) {
-    // Case 1: The producer is closed.
-    channel->SerializeEndpointWithClosedPeer(destination_for_endpoint,
-                                             &message_queue);
-    *actual_size = sizeof(SerializedDataPipeConsumerDispatcher) +
-                   channel->GetSerializedEndpointSize();
-    return true;
-  }
-
-  // Case 2: The producer isn't closed. We pass |channel_endpoint| back to the
-  // |Channel|. There's no reason for us to continue to exist afterwards.
-
-  // Note: We don't use |port|.
-  scoped_refptr<ChannelEndpoint> channel_endpoint;
-  channel_endpoint.swap(channel_endpoint_);
-  channel->SerializeEndpointWithRemotePeer(destination_for_endpoint,
-                                           &message_queue, channel_endpoint);
-  owner()->SetProducerClosedNoLock();
-
-  *actual_size = sizeof(SerializedDataPipeConsumerDispatcher) +
-                 channel->GetSerializedEndpointSize();
-  return true;
-}
-
-bool RemoteProducerDataPipeImpl::OnReadMessage(unsigned /*port*/,
-                                               MessageInTransit* message) {
-  if (!producer_open()) {
-    // 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()|).
-    DCHECK(!channel_endpoint_);
-    return false;
-  }
-
-  // Otherwise, we take ownership of the message. (This means that we should
-  // always return true below.)
-  scoped_ptr<MessageInTransit> msg(message);
-
-  if (!ValidateIncomingMessage(element_num_bytes(), capacity_num_bytes(),
-                               current_num_bytes_, msg.get())) {
-    Disconnect();
-    return true;
-  }
-
-  size_t num_bytes = msg->num_bytes();
-  // The amount we can write in our first copy.
-  size_t num_bytes_to_copy_first = std::min(num_bytes, GetMaxNumBytesToWrite());
-  // Do the first (and possibly only) copy.
-  size_t first_write_index =
-      (start_index_ + current_num_bytes_) % capacity_num_bytes();
-  EnsureBuffer();
-  memcpy(buffer_.get() + first_write_index, msg->bytes(),
-         num_bytes_to_copy_first);
-
-  if (num_bytes_to_copy_first < num_bytes) {
-    // The "second write index" is zero.
-    memcpy(buffer_.get(),
-           static_cast<const char*>(msg->bytes()) + num_bytes_to_copy_first,
-           num_bytes - num_bytes_to_copy_first);
-  }
-
-  current_num_bytes_ += num_bytes;
-  DCHECK_LE(current_num_bytes_, capacity_num_bytes());
-  return true;
-}
-
-void RemoteProducerDataPipeImpl::OnDetachFromChannel(unsigned /*port*/) {
-  if (!producer_open()) {
-    DCHECK(!channel_endpoint_);
-    return;
-  }
-
-  Disconnect();
-}
-
-void RemoteProducerDataPipeImpl::EnsureBuffer() {
-  DCHECK(producer_open());
-  if (buffer_)
-    return;
-  buffer_.reset(static_cast<char*>(
-      base::AlignedAlloc(capacity_num_bytes(),
-                         GetConfiguration().data_pipe_buffer_alignment_bytes)));
-}
-
-void RemoteProducerDataPipeImpl::DestroyBuffer() {
-#ifndef NDEBUG
-  // Scribble on the buffer to help detect use-after-frees. (This also helps the
-  // unit test detect certain bugs without needing ASAN or similar.)
-  if (buffer_)
-    memset(buffer_.get(), 0xcd, capacity_num_bytes());
-#endif
-  buffer_.reset();
-}
-
-size_t RemoteProducerDataPipeImpl::GetMaxNumBytesToWrite() {
-  size_t next_index = start_index_ + current_num_bytes_;
-  if (next_index >= capacity_num_bytes()) {
-    next_index %= capacity_num_bytes();
-    DCHECK_GE(start_index_, next_index);
-    DCHECK_EQ(start_index_ - next_index,
-              capacity_num_bytes() - current_num_bytes_);
-    return start_index_ - next_index;
-  }
-  return capacity_num_bytes() - next_index;
-}
-
-size_t RemoteProducerDataPipeImpl::GetMaxNumBytesToRead() {
-  if (start_index_ + current_num_bytes_ > capacity_num_bytes())
-    return capacity_num_bytes() - start_index_;
-  return current_num_bytes_;
-}
-
-void RemoteProducerDataPipeImpl::MarkDataAsConsumed(size_t num_bytes) {
-  DCHECK_LE(num_bytes, current_num_bytes_);
-  start_index_ += num_bytes;
-  start_index_ %= capacity_num_bytes();
-  current_num_bytes_ -= num_bytes;
-
-  if (!producer_open()) {
-    DCHECK(!channel_endpoint_);
-    return;
-  }
-
-  RemoteDataPipeAck ack_data = {};
-  ack_data.num_bytes_consumed = static_cast<uint32_t>(num_bytes);
-  scoped_ptr<MessageInTransit> message(new MessageInTransit(
-      MessageInTransit::Type::ENDPOINT_CLIENT,
-      MessageInTransit::Subtype::ENDPOINT_CLIENT_DATA_PIPE_ACK,
-      static_cast<uint32_t>(sizeof(ack_data)), &ack_data));
-  if (!channel_endpoint_->EnqueueMessage(std::move(message)))
-    Disconnect();
-}
-
-void RemoteProducerDataPipeImpl::Disconnect() {
-  DCHECK(producer_open());
-  DCHECK(channel_endpoint_);
-  owner()->SetProducerClosedNoLock();
-  channel_endpoint_->DetachFromClient();
-  channel_endpoint_ = nullptr;
-  // If the consumer is still open and we still have data, we have to keep the
-  // buffer around. Currently, we won't free it even if it empties later. (We
-  // could do this -- requiring a check on every read -- but that seems to be
-  // optimizing for the uncommon case.)
-  if (!consumer_open() || !current_num_bytes_)
-    DestroyBuffer();
-}
-
-}  // namespace system
-}  // namespace mojo