Keep only base/extractor.[cc|h].

base/sta.h

-// Copyright 2008-2009 Google Inc.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-// ========================================================================
-//
-// STA initializes a custom non-COM Single Threaded Apartment to facilitate
-// calling of functions and object methods in the thread of the STA. This is
-// useful when creating a simple threading model based on a main thread and
-// several worker threads, especially for client components that have a UI or
-// use the COM STA models.
-//
-// The current implementation only supports initializing the main STA, which is
-// the STA created by the main thread of the process. This is usually the UI
-// thread. Having multiple STA in a process is not possible yet.
-//
-// This custom STA does not interfere with the COM STAs.
-//
-// In order for the STA to work properly, the STA thread must keep processing
-// messages and not block, just like in the COM STA case.
-
-#ifndef OMAHA_COMMON_STA_H__
-#define OMAHA_COMMON_STA_H__
-
-#include <windows.h>
-#include "omaha/base/debug.h"
-#include "omaha/base/scoped_any.h"
-
-namespace omaha {
-
-// Initializes the STA apartment. The 'reserved' parameter must be 0.
-// InitializeApartment and UninitializeApartment are reference-counted.
-HRESULT InitializeApartment(DWORD reserved);
-
-// Uninitializes the STA apartment.
-HRESULT UninitializeApartment();
-
-// A scoped_sta smart pointer is provided to manage the calls to
-// InitializeApartment and UninitializeApartment.
-inline HRESULT smart_sta_init_helper(DWORD reserved) {
-  return InitializeApartment(reserved);
-}
-
-inline void smart_uninit_helper(HRESULT result) {
-  if (result == S_OK) {
-    VERIFY1(SUCCEEDED(UninitializeApartment()));
-  }
-}
-
-typedef close_fun<void (*)(HRESULT), smart_uninit_helper> close_sta;
-
-typedef value_const<HRESULT, E_UNEXPECTED> sta_not_init;
-
-typedef scoped_any<HRESULT, close_sta, sta_not_init> scoped_sta_close;
-
-struct scoped_sta {
-  explicit scoped_sta(DWORD reserved)
-      : result_(smart_sta_init_helper(reserved)) {}
-
-  HRESULT result() const { return get(result_); }
-
- private:
-  const scoped_sta_close result_;
-};
-
-}  // namespace omaha
-
-#endif  // OMAHA_COMMON_STA_H__
-