base/win/scoped_hglobal.h

// Copyright 2010 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef BASE_WIN_SCOPED_HGLOBAL_H_
#define BASE_WIN_SCOPED_HGLOBAL_H_

#include <windows.h>

#include <stddef.h>

namespace base {
namespace win {

// Like ScopedHandle except for HGLOBAL.
template <class T>
class ScopedHGlobal {
 public:
  explicit ScopedHGlobal(HGLOBAL glob) : glob_(glob) {
    data_ = static_cast<T>(GlobalLock(glob_));
  }

  ScopedHGlobal(const ScopedHGlobal&) = delete;
  ScopedHGlobal& operator=(const ScopedHGlobal&) = delete;

  ~ScopedHGlobal() { GlobalUnlock(glob_); }

  T get() { return data_; }

  size_t Size() const { return GlobalSize(glob_); }

  T operator->() const {
    assert(data_ != 0);
    return data_;
  }

  T release() {
    T data = data_;
    data_ = NULL;
    return data;
  }

 private:
  HGLOBAL glob_;

  T data_;
};

}  // namespace win
}  // namespace base

#endif  // BASE_WIN_SCOPED_HGLOBAL_H_