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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_mscom_ApartmentRegion_h
#define mozilla_mscom_ApartmentRegion_h
#include "mozilla/Assertions.h"
#include "mozilla/Attributes.h"
#include <objbase.h>
namespace mozilla {
namespace mscom {
class MOZ_NON_TEMPORARY_CLASS ApartmentRegion final {
public:
/**
* This constructor is to be used when we want to instantiate the object but
* we do not yet know which type of apartment we want. Call Init() to
* complete initialization.
*/
constexpr ApartmentRegion() : mInitResult(CO_E_NOTINITIALIZED) {}
explicit ApartmentRegion(COINIT aAptType)
: mInitResult(::CoInitializeEx(nullptr, aAptType)) {
// If this fires then we're probably mixing apartments on the same thread
MOZ_ASSERT(IsValid());
}
~ApartmentRegion() {
if (IsValid()) {
::CoUninitialize();
}
}
explicit operator bool() const { return IsValid(); }
bool IsValidOutermost() const { return mInitResult == S_OK; }
bool IsValid() const { return SUCCEEDED(mInitResult); }
bool Init(COINIT aAptType) {
MOZ_ASSERT(mInitResult == CO_E_NOTINITIALIZED);
mInitResult = ::CoInitializeEx(nullptr, aAptType);
MOZ_ASSERT(IsValid());
return IsValid();
}
HRESULT
GetHResult() const { return mInitResult; }
private:
ApartmentRegion(const ApartmentRegion&) = delete;
ApartmentRegion& operator=(const ApartmentRegion&) = delete;
ApartmentRegion(ApartmentRegion&&) = delete;
ApartmentRegion& operator=(ApartmentRegion&&) = delete;
HRESULT mInitResult;
};
template <COINIT T>
class MOZ_NON_TEMPORARY_CLASS ApartmentRegionT final {
public:
ApartmentRegionT() : mAptRgn(T) {}
~ApartmentRegionT() = default;
explicit operator bool() const { return mAptRgn.IsValid(); }
bool IsValidOutermost() const { return mAptRgn.IsValidOutermost(); }
bool IsValid() const { return mAptRgn.IsValid(); }
HRESULT GetHResult() const { return mAptRgn.GetHResult(); }
private:
ApartmentRegionT(const ApartmentRegionT&) = delete;
ApartmentRegionT& operator=(const ApartmentRegionT&) = delete;
ApartmentRegionT(ApartmentRegionT&&) = delete;
ApartmentRegionT& operator=(ApartmentRegionT&&) = delete;
ApartmentRegion mAptRgn;
};
typedef ApartmentRegionT<COINIT_APARTMENTTHREADED> STARegion;
typedef ApartmentRegionT<COINIT_MULTITHREADED> MTARegion;
} // namespace mscom
} // namespace mozilla
#endif // mozilla_mscom_ApartmentRegion_h
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