Move mojo edk into mojo/edk

mojo/system/local_data_pipe.h

-// 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.
-
-#ifndef MOJO_SYSTEM_LOCAL_DATA_PIPE_H_
-#define MOJO_SYSTEM_LOCAL_DATA_PIPE_H_
-
-#include "base/macros.h"
-#include "base/memory/aligned_memory.h"
-#include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
-#include "mojo/system/data_pipe.h"
-#include "mojo/system/system_impl_export.h"
-
-namespace mojo {
-namespace system {
-
-// |LocalDataPipe| is a subclass that "implements" |DataPipe| for data pipes
-// whose producer and consumer are both local. This class is thread-safe (with
-// protection provided by |DataPipe|'s |lock_|.
-class MOJO_SYSTEM_IMPL_EXPORT LocalDataPipe : public DataPipe {
- public:
-  // |validated_options| should be the output of |DataPipe::ValidateOptions()|.
-  // In particular: |struct_size| is ignored (so |validated_options| must be the
-  // current version of the struct) and |capacity_num_bytes| must be nonzero.
-  explicit LocalDataPipe(const MojoCreateDataPipeOptions& validated_options);
-
- private:
-  friend class base::RefCountedThreadSafe<LocalDataPipe>;
-  virtual ~LocalDataPipe();
-
-  // |DataPipe| implementation:
-  virtual void ProducerCloseImplNoLock() override;
-  virtual MojoResult ProducerWriteDataImplNoLock(
-      UserPointer<const void> elements,
-      UserPointer<uint32_t> num_bytes,
-      uint32_t max_num_bytes_to_write,
-      uint32_t min_num_bytes_to_write) override;
-  virtual MojoResult ProducerBeginWriteDataImplNoLock(
-      UserPointer<void*> buffer,
-      UserPointer<uint32_t> buffer_num_bytes,
-      uint32_t min_num_bytes_to_write) override;
-  virtual MojoResult ProducerEndWriteDataImplNoLock(
-      uint32_t num_bytes_written) override;
-  virtual HandleSignalsState ProducerGetHandleSignalsStateImplNoLock()
-      const override;
-  virtual void ConsumerCloseImplNoLock() override;
-  virtual MojoResult ConsumerReadDataImplNoLock(
-      UserPointer<void> elements,
-      UserPointer<uint32_t> num_bytes,
-      uint32_t max_num_bytes_to_read,
-      uint32_t min_num_bytes_to_read) override;
-  virtual MojoResult ConsumerDiscardDataImplNoLock(
-      UserPointer<uint32_t> num_bytes,
-      uint32_t max_num_bytes_to_discard,
-      uint32_t min_num_bytes_to_discard) override;
-  virtual MojoResult ConsumerQueryDataImplNoLock(
-      UserPointer<uint32_t> num_bytes) override;
-  virtual MojoResult ConsumerBeginReadDataImplNoLock(
-      UserPointer<const void*> buffer,
-      UserPointer<uint32_t> buffer_num_bytes,
-      uint32_t min_num_bytes_to_read) override;
-  virtual MojoResult ConsumerEndReadDataImplNoLock(
-      uint32_t num_bytes_read) override;
-  virtual HandleSignalsState ConsumerGetHandleSignalsStateImplNoLock()
-      const override;
-
-  void EnsureBufferNoLock();
-  void DestroyBufferNoLock();
-
-  // Get the maximum (single) write/read size right now (in number of elements);
-  // result fits in a |uint32_t|.
-  size_t GetMaxNumBytesToWriteNoLock();
-  size_t GetMaxNumBytesToReadNoLock();
-
-  // Marks the given number of bytes as consumed/discarded. |num_bytes| must be
-  // greater than |current_num_bytes_|.
-  void MarkDataAsConsumedNoLock(size_t num_bytes);
-
-  // The members below are protected by |DataPipe|'s |lock_|:
-  scoped_ptr<char, base::AlignedFreeDeleter> buffer_;
-  // Circular buffer.
-  size_t start_index_;
-  size_t current_num_bytes_;
-
-  DISALLOW_COPY_AND_ASSIGN(LocalDataPipe);
-};
-
-}  // namespace system
-}  // namespace mojo
-
-#endif  // MOJO_SYSTEM_LOCAL_DATA_PIPE_H_