Move base to DEPS

base/memory/ref_counted_memory.h

-// Copyright (c) 2012 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 BASE_MEMORY_REF_COUNTED_MEMORY_H_
-#define BASE_MEMORY_REF_COUNTED_MEMORY_H_
-
-#include <string>
-#include <vector>
-
-#include "base/base_export.h"
-#include "base/compiler_specific.h"
-#include "base/memory/ref_counted.h"
-
-namespace base {
-
-// A generic interface to memory. This object is reference counted because one
-// of its two subclasses own the data they carry, and we need to have
-// heterogeneous containers of these two types of memory.
-class BASE_EXPORT RefCountedMemory
-    : public base::RefCountedThreadSafe<RefCountedMemory> {
- public:
-  // Retrieves a pointer to the beginning of the data we point to. If the data
-  // is empty, this will return NULL.
-  virtual const unsigned char* front() const = 0;
-
-  // Size of the memory pointed to.
-  virtual size_t size() const = 0;
-
-  // Returns true if |other| is byte for byte equal.
-  bool Equals(const scoped_refptr<RefCountedMemory>& other) const;
-
-  // Handy method to simplify calling front() with a reinterpret_cast.
-  template<typename T> const T* front_as() const {
-    return reinterpret_cast<const T*>(front());
-  }
-
- protected:
-  friend class base::RefCountedThreadSafe<RefCountedMemory>;
-  RefCountedMemory();
-  virtual ~RefCountedMemory();
-};
-
-// An implementation of RefCountedMemory, where the ref counting does not
-// matter.
-class BASE_EXPORT RefCountedStaticMemory : public RefCountedMemory {
- public:
-  RefCountedStaticMemory()
-      : data_(NULL), length_(0) {}
-  RefCountedStaticMemory(const void* data, size_t length)
-      : data_(static_cast<const unsigned char*>(length ? data : NULL)),
-        length_(length) {}
-
-  // Overridden from RefCountedMemory:
-  const unsigned char* front() const override;
-  size_t size() const override;
-
- private:
-  ~RefCountedStaticMemory() override;
-
-  const unsigned char* data_;
-  size_t length_;
-
-  DISALLOW_COPY_AND_ASSIGN(RefCountedStaticMemory);
-};
-
-// An implementation of RefCountedMemory, where we own the data in a vector.
-class BASE_EXPORT RefCountedBytes : public RefCountedMemory {
- public:
-  RefCountedBytes();
-
-  // Constructs a RefCountedBytes object by _copying_ from |initializer|.
-  explicit RefCountedBytes(const std::vector<unsigned char>& initializer);
-
-  // Constructs a RefCountedBytes object by copying |size| bytes from |p|.
-  RefCountedBytes(const unsigned char* p, size_t size);
-
-  // Constructs a RefCountedBytes object by performing a swap. (To non
-  // destructively build a RefCountedBytes, use the constructor that takes a
-  // vector.)
-  static RefCountedBytes* TakeVector(std::vector<unsigned char>* to_destroy);
-
-  // Overridden from RefCountedMemory:
-  const unsigned char* front() const override;
-  size_t size() const override;
-
-  const std::vector<unsigned char>& data() const { return data_; }
-  std::vector<unsigned char>& data() { return data_; }
-
- private:
-  ~RefCountedBytes() override;
-
-  std::vector<unsigned char> data_;
-
-  DISALLOW_COPY_AND_ASSIGN(RefCountedBytes);
-};
-
-// An implementation of RefCountedMemory, where the bytes are stored in an STL
-// string. Use this if your data naturally arrives in that format.
-class BASE_EXPORT RefCountedString : public RefCountedMemory {
- public:
-  RefCountedString();
-
-  // Constructs a RefCountedString object by performing a swap. (To non
-  // destructively build a RefCountedString, use the default constructor and
-  // copy into object->data()).
-  static RefCountedString* TakeString(std::string* to_destroy);
-
-  // Overridden from RefCountedMemory:
-  const unsigned char* front() const override;
-  size_t size() const override;
-
-  const std::string& data() const { return data_; }
-  std::string& data() { return data_; }
-
- private:
-  ~RefCountedString() override;
-
-  std::string data_;
-
-  DISALLOW_COPY_AND_ASSIGN(RefCountedString);
-};
-
-// An implementation of RefCountedMemory that holds a chunk of memory
-// previously allocated with malloc or calloc, and that therefore must be freed
-// using free().
-class BASE_EXPORT RefCountedMallocedMemory : public base::RefCountedMemory {
- public:
-  RefCountedMallocedMemory(void* data, size_t length);
-
-  // Overridden from RefCountedMemory:
-  const unsigned char* front() const override;
-  size_t size() const override;
-
- private:
-  ~RefCountedMallocedMemory() override;
-
-  unsigned char* data_;
-  size_t length_;
-
-  DISALLOW_COPY_AND_ASSIGN(RefCountedMallocedMemory);
-};
-
-}  // namespace base
-
-#endif  // BASE_MEMORY_REF_COUNTED_MEMORY_H_