Revert "Move mojo edk into mojo/edk"

mojo/edk/system/shared_buffer_dispatcher.cc

Index: mojo/edk/system/shared_buffer_dispatcher.cc
diff --git a/mojo/edk/system/shared_buffer_dispatcher.cc b/mojo/edk/system/shared_buffer_dispatcher.cc
deleted file mode 100644
index 7e345d93f837af69627fc25920470657dff3191f..0000000000000000000000000000000000000000
--- a/mojo/edk/system/shared_buffer_dispatcher.cc
+++ /dev/null
@@ -1,276 +0,0 @@
-// 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/edk/system/shared_buffer_dispatcher.h"
-
-#include <limits>
-
-#include "base/logging.h"
-#include "base/memory/scoped_ptr.h"
-#include "mojo/edk/embedder/platform_support.h"
-#include "mojo/edk/system/channel.h"
-#include "mojo/edk/system/constants.h"
-#include "mojo/edk/system/memory.h"
-#include "mojo/edk/system/options_validation.h"
-#include "mojo/public/c/system/macros.h"
-
-namespace mojo {
-namespace system {
-
-namespace {
-
-struct SerializedSharedBufferDispatcher {
-  size_t num_bytes;
-  size_t platform_handle_index;
-};
-
-}  // namespace
-
-// static
-const MojoCreateSharedBufferOptions
-    SharedBufferDispatcher::kDefaultCreateOptions = {
-        static_cast<uint32_t>(sizeof(MojoCreateSharedBufferOptions)),
-        MOJO_CREATE_SHARED_BUFFER_OPTIONS_FLAG_NONE};
-
-// static
-MojoResult SharedBufferDispatcher::ValidateCreateOptions(
-    UserPointer<const MojoCreateSharedBufferOptions> in_options,
-    MojoCreateSharedBufferOptions* out_options) {
-  const MojoCreateSharedBufferOptionsFlags kKnownFlags =
-      MOJO_CREATE_SHARED_BUFFER_OPTIONS_FLAG_NONE;
-
-  *out_options = kDefaultCreateOptions;
-  if (in_options.IsNull())
-    return MOJO_RESULT_OK;
-
-  UserOptionsReader<MojoCreateSharedBufferOptions> reader(in_options);
-  if (!reader.is_valid())
-    return MOJO_RESULT_INVALID_ARGUMENT;
-
-  if (!OPTIONS_STRUCT_HAS_MEMBER(MojoCreateSharedBufferOptions, flags, reader))
-    return MOJO_RESULT_OK;
-  if ((reader.options().flags & ~kKnownFlags))
-    return MOJO_RESULT_UNIMPLEMENTED;
-  out_options->flags = reader.options().flags;
-
-  // Checks for fields beyond |flags|:
-
-  // (Nothing here yet.)
-
-  return MOJO_RESULT_OK;
-}
-
-// static
-MojoResult SharedBufferDispatcher::Create(
-    embedder::PlatformSupport* platform_support,
-    const MojoCreateSharedBufferOptions& /*validated_options*/,
-    uint64_t num_bytes,
-    scoped_refptr<SharedBufferDispatcher>* result) {
-  if (!num_bytes)
-    return MOJO_RESULT_INVALID_ARGUMENT;
-  if (num_bytes > kMaxSharedMemoryNumBytes)
-    return MOJO_RESULT_RESOURCE_EXHAUSTED;
-
-  scoped_refptr<embedder::PlatformSharedBuffer> shared_buffer(
-      platform_support->CreateSharedBuffer(static_cast<size_t>(num_bytes)));
-  if (!shared_buffer.get())
-    return MOJO_RESULT_RESOURCE_EXHAUSTED;
-
-  *result = new SharedBufferDispatcher(shared_buffer);
-  return MOJO_RESULT_OK;
-}
-
-Dispatcher::Type SharedBufferDispatcher::GetType() const {
-  return kTypeSharedBuffer;
-}
-
-// static
-scoped_refptr<SharedBufferDispatcher> SharedBufferDispatcher::Deserialize(
-    Channel* channel,
-    const void* source,
-    size_t size,
-    embedder::PlatformHandleVector* platform_handles) {
-  DCHECK(channel);
-
-  if (size != sizeof(SerializedSharedBufferDispatcher)) {
-    LOG(ERROR) << "Invalid serialized shared buffer dispatcher (bad size)";
-    return scoped_refptr<SharedBufferDispatcher>();
-  }
-
-  const SerializedSharedBufferDispatcher* serialization =
-      static_cast<const SerializedSharedBufferDispatcher*>(source);
-  size_t num_bytes = serialization->num_bytes;
-  size_t platform_handle_index = serialization->platform_handle_index;
-
-  if (!num_bytes) {
-    LOG(ERROR)
-        << "Invalid serialized shared buffer dispatcher (invalid num_bytes)";
-    return scoped_refptr<SharedBufferDispatcher>();
-  }
-
-  if (!platform_handles || platform_handle_index >= platform_handles->size()) {
-    LOG(ERROR)
-        << "Invalid serialized shared buffer dispatcher (missing handles)";
-    return scoped_refptr<SharedBufferDispatcher>();
-  }
-
-  // Starts off invalid, which is what we want.
-  embedder::PlatformHandle platform_handle;
-  // We take ownership of the handle, so we have to invalidate the one in
-  // |platform_handles|.
-  std::swap(platform_handle, (*platform_handles)[platform_handle_index]);
-
-  // Wrapping |platform_handle| in a |ScopedPlatformHandle| means that it'll be
-  // closed even if creation fails.
-  scoped_refptr<embedder::PlatformSharedBuffer> shared_buffer(
-      channel->platform_support()->CreateSharedBufferFromHandle(
-          num_bytes, embedder::ScopedPlatformHandle(platform_handle)));
-  if (!shared_buffer.get()) {
-    LOG(ERROR)
-        << "Invalid serialized shared buffer dispatcher (invalid num_bytes?)";
-    return scoped_refptr<SharedBufferDispatcher>();
-  }
-
-  return scoped_refptr<SharedBufferDispatcher>(
-      new SharedBufferDispatcher(shared_buffer));
-}
-
-SharedBufferDispatcher::SharedBufferDispatcher(
-    scoped_refptr<embedder::PlatformSharedBuffer> shared_buffer)
-    : shared_buffer_(shared_buffer) {
-  DCHECK(shared_buffer_.get());
-}
-
-SharedBufferDispatcher::~SharedBufferDispatcher() {
-}
-
-// static
-MojoResult SharedBufferDispatcher::ValidateDuplicateOptions(
-    UserPointer<const MojoDuplicateBufferHandleOptions> in_options,
-    MojoDuplicateBufferHandleOptions* out_options) {
-  const MojoDuplicateBufferHandleOptionsFlags kKnownFlags =
-      MOJO_DUPLICATE_BUFFER_HANDLE_OPTIONS_FLAG_NONE;
-  static const MojoDuplicateBufferHandleOptions kDefaultOptions = {
-      static_cast<uint32_t>(sizeof(MojoDuplicateBufferHandleOptions)),
-      MOJO_DUPLICATE_BUFFER_HANDLE_OPTIONS_FLAG_NONE};
-
-  *out_options = kDefaultOptions;
-  if (in_options.IsNull())
-    return MOJO_RESULT_OK;
-
-  UserOptionsReader<MojoDuplicateBufferHandleOptions> reader(in_options);
-  if (!reader.is_valid())
-    return MOJO_RESULT_INVALID_ARGUMENT;
-
-  if (!OPTIONS_STRUCT_HAS_MEMBER(
-          MojoDuplicateBufferHandleOptions, flags, reader))
-    return MOJO_RESULT_OK;
-  if ((reader.options().flags & ~kKnownFlags))
-    return MOJO_RESULT_UNIMPLEMENTED;
-  out_options->flags = reader.options().flags;
-
-  // Checks for fields beyond |flags|:
-
-  // (Nothing here yet.)
-
-  return MOJO_RESULT_OK;
-}
-
-void SharedBufferDispatcher::CloseImplNoLock() {
-  lock().AssertAcquired();
-  DCHECK(shared_buffer_.get());
-  shared_buffer_ = nullptr;
-}
-
-scoped_refptr<Dispatcher>
-SharedBufferDispatcher::CreateEquivalentDispatcherAndCloseImplNoLock() {
-  lock().AssertAcquired();
-  DCHECK(shared_buffer_.get());
-  scoped_refptr<embedder::PlatformSharedBuffer> shared_buffer;
-  shared_buffer.swap(shared_buffer_);
-  return scoped_refptr<Dispatcher>(new SharedBufferDispatcher(shared_buffer));
-}
-
-MojoResult SharedBufferDispatcher::DuplicateBufferHandleImplNoLock(
-    UserPointer<const MojoDuplicateBufferHandleOptions> options,
-    scoped_refptr<Dispatcher>* new_dispatcher) {
-  lock().AssertAcquired();
-
-  MojoDuplicateBufferHandleOptions validated_options;
-  MojoResult result = ValidateDuplicateOptions(options, &validated_options);
-  if (result != MOJO_RESULT_OK)
-    return result;
-
-  *new_dispatcher = new SharedBufferDispatcher(shared_buffer_);
-  return MOJO_RESULT_OK;
-}
-
-MojoResult SharedBufferDispatcher::MapBufferImplNoLock(
-    uint64_t offset,
-    uint64_t num_bytes,
-    MojoMapBufferFlags flags,
-    scoped_ptr<embedder::PlatformSharedBufferMapping>* mapping) {
-  lock().AssertAcquired();
-  DCHECK(shared_buffer_.get());
-
-  if (offset > static_cast<uint64_t>(std::numeric_limits<size_t>::max()))
-    return MOJO_RESULT_INVALID_ARGUMENT;
-  if (num_bytes > static_cast<uint64_t>(std::numeric_limits<size_t>::max()))
-    return MOJO_RESULT_INVALID_ARGUMENT;
-
-  if (!shared_buffer_->IsValidMap(static_cast<size_t>(offset),
-                                  static_cast<size_t>(num_bytes)))
-    return MOJO_RESULT_INVALID_ARGUMENT;
-
-  DCHECK(mapping);
-  *mapping = shared_buffer_->MapNoCheck(static_cast<size_t>(offset),
-                                        static_cast<size_t>(num_bytes));
-  if (!*mapping)
-    return MOJO_RESULT_RESOURCE_EXHAUSTED;
-
-  return MOJO_RESULT_OK;
-}
-
-void SharedBufferDispatcher::StartSerializeImplNoLock(
-    Channel* /*channel*/,
-    size_t* max_size,
-    size_t* max_platform_handles) {
-  DCHECK(HasOneRef());  // Only one ref => no need to take the lock.
-  *max_size = sizeof(SerializedSharedBufferDispatcher);
-  *max_platform_handles = 1;
-}
-
-bool SharedBufferDispatcher::EndSerializeAndCloseImplNoLock(
-    Channel* /*channel*/,
-    void* destination,
-    size_t* actual_size,
-    embedder::PlatformHandleVector* platform_handles) {
-  DCHECK(HasOneRef());  // Only one ref => no need to take the lock.
-  DCHECK(shared_buffer_.get());
-
-  SerializedSharedBufferDispatcher* serialization =
-      static_cast<SerializedSharedBufferDispatcher*>(destination);
-  // If there's only one reference to |shared_buffer_|, then it's ours (and no
-  // one else can make any more references to it), so we can just take its
-  // handle.
-  embedder::ScopedPlatformHandle platform_handle(
-      shared_buffer_->HasOneRef() ? shared_buffer_->PassPlatformHandle()
-                                  : shared_buffer_->DuplicatePlatformHandle());
-  if (!platform_handle.is_valid()) {
-    shared_buffer_ = nullptr;
-    return false;
-  }
-
-  serialization->num_bytes = shared_buffer_->GetNumBytes();
-  serialization->platform_handle_index = platform_handles->size();
-  platform_handles->push_back(platform_handle.release());
-  *actual_size = sizeof(SerializedSharedBufferDispatcher);
-
-  shared_buffer_ = nullptr;
-
-  return true;
-}
-
-}  // namespace system
-}  // namespace mojo