Move the windows-specific scoped_* stuff from base to base/win and in the bas...

base/win/scoped_hglobal.h

 // Copyright (c) 2010 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_SCOPED_HANDLE_WIN_H_
-#define BASE_SCOPED_HANDLE_WIN_H_
+#ifndef BASE_WIN_SCOPED_HGLOBAL_H_
+#define BASE_WIN_SCOPED_HGLOBAL_H_
 #pragma once
 
 #include <windows.h>
 
 #include "base/basictypes.h"
-#include "base/logging.h"
 
-// Used so we always remember to close the handle.
-// The class interface matches that of ScopedStdioHandle in  addition to an
-// IsValid() method since invalid handles on windows can be either NULL or
-// INVALID_HANDLE_VALUE (-1).
-//
-// Example:
-//   ScopedHandle hfile(CreateFile(...));
-//   if (!hfile.Get())
-//     ...process error
-//   ReadFile(hfile.Get(), ...);
-//
-// To sqirrel the handle away somewhere else:
-//   secret_handle_ = hfile.Take();
-//
-// To explicitly close the handle:
-//   hfile.Close();
-class ScopedHandle {
- public:
-  ScopedHandle() : handle_(NULL) {
-  }
-
-  explicit ScopedHandle(HANDLE h) : handle_(NULL) {
-    Set(h);
-  }
-
-  ~ScopedHandle() {
-    Close();
-  }
-
-  // Use this instead of comparing to INVALID_HANDLE_VALUE to pick up our NULL
-  // usage for errors.
-  bool IsValid() const {
-    return handle_ != NULL;
-  }
-
-  void Set(HANDLE new_handle) {
-    Close();
-
-    // Windows is inconsistent about invalid handles, so we always use NULL
-    if (new_handle != INVALID_HANDLE_VALUE)
-      handle_ = new_handle;
-  }
-
-  HANDLE Get() {
-    return handle_;
-  }
-
-  operator HANDLE() { return handle_; }
-
-  HANDLE Take() {
-    // transfers ownership away from this object
-    HANDLE h = handle_;
-    handle_ = NULL;
-    return h;
-  }
-
-  void Close() {
-    if (handle_) {
-      if (!::CloseHandle(handle_)) {
-        NOTREACHED();
-      }
-      handle_ = NULL;
-    }
-  }
-
- private:
-  HANDLE handle_;
-  DISALLOW_COPY_AND_ASSIGN(ScopedHandle);
-};
-
-// Like ScopedHandle, but for HANDLEs returned from FindFile().
-class ScopedFindFileHandle {
- public:
-  explicit ScopedFindFileHandle(HANDLE handle) : handle_(handle) {
-    // Windows is inconsistent about invalid handles, so we always use NULL
-    if (handle_ == INVALID_HANDLE_VALUE)
-      handle_ = NULL;
-  }
-
-  ~ScopedFindFileHandle() {
-    if (handle_)
-      FindClose(handle_);
-  }
-
-  // Use this instead of comparing to INVALID_HANDLE_VALUE to pick up our NULL
-  // usage for errors.
-  bool IsValid() const { return handle_ != NULL; }
-
-  operator HANDLE() { return handle_; }
-
- private:
-  HANDLE handle_;
-
-  DISALLOW_COPY_AND_ASSIGN(ScopedFindFileHandle);
-};
-
-// Like ScopedHandle but for HDC.  Only use this on HDCs returned from
-// CreateCompatibleDC.  For an HDC returned by GetDC, use ReleaseDC instead.
-class ScopedHDC {
- public:
-  ScopedHDC() : hdc_(NULL) { }
-  explicit ScopedHDC(HDC h) : hdc_(h) { }
-
-  ~ScopedHDC() {
-    Close();
-  }
-
-  HDC Get() {
-    return hdc_;
-  }
-
-  void Set(HDC h) {
-    Close();
-    hdc_ = h;
-  }
-
-  operator HDC() { return hdc_; }
-
- private:
-  void Close() {
-#ifdef NOGDI
-    assert(false);
-#else
-    if (hdc_)
-      DeleteDC(hdc_);
-#endif  // NOGDI
-  }
-
-  HDC hdc_;
-  DISALLOW_COPY_AND_ASSIGN(ScopedHDC);
-};
-
-// Like ScopedHandle but for GDI objects.
-template<class T>
-class ScopedGDIObject {
- public:
-  ScopedGDIObject() : object_(NULL) {}
-  explicit ScopedGDIObject(T object) : object_(object) {}
-
-  ~ScopedGDIObject() {
-    Close();
-  }
-
-  T Get() {
-    return object_;
-  }
-
-  void Set(T object) {
-    if (object_ && object != object_)
-      Close();
-    object_ = object;
-  }
-
-  ScopedGDIObject& operator=(T object) {
-    Set(object);
-    return *this;
-  }
-
-  T release() {
-    T object = object_;
-    object_ = NULL;
-    return object;
-  }
-
-  operator T() { return object_; }
-
- private:
-  void Close() {
-    if (object_)
-      DeleteObject(object_);
-  }
-
-  T object_;
-  DISALLOW_COPY_AND_ASSIGN(ScopedGDIObject);
-};
-
-// An explicit specialization for HICON because we have to call DestroyIcon()
-// instead of DeleteObject() for HICON.
-template<>
-void ScopedGDIObject<HICON>::Close() {
-  if (object_)
-    DestroyIcon(object_);
-}
-
-// Typedefs for some common use cases.
-typedef ScopedGDIObject<HBITMAP> ScopedBitmap;
-typedef ScopedGDIObject<HRGN> ScopedRegion;
-typedef ScopedGDIObject<HFONT> ScopedHFONT;
-typedef ScopedGDIObject<HICON> ScopedHICON;
+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() {
     GlobalUnlock(glob_);
@@ skipping 15 matching lines @@
   }
 
  private:
   HGLOBAL glob_;
 
   T* data_;
 
   DISALLOW_COPY_AND_ASSIGN(ScopedHGlobal);
 };
 
-#endif  // BASE_SCOPED_HANDLE_WIN_H_
+}  // namespace win
+}  // namespace base
+
+#endif  // BASE_WIN_SCOPED_HGLOBAL_H_