зеркало из https://github.com/mozilla/gecko-dev.git
102 строки
2.9 KiB
C++
102 строки
2.9 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_mscom_ActivationContext_h
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#define mozilla_mscom_ActivationContext_h
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#include <utility>
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#include "mozilla/Attributes.h"
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#include "mozilla/mscom/ActCtxResource.h"
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#if defined(MOZILLA_INTERNAL_API)
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# include "mozilla/ResultVariant.h"
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# include "nsString.h"
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#endif // defined(MOZILLA_INTERNAL_API)
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#include <windows.h>
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namespace mozilla {
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namespace mscom {
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class ActivationContext final {
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public:
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// This is the default resource ID that the Windows dynamic linker searches
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// for when seeking a manifest while loading a DLL.
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static constexpr WORD kDllManifestDefaultResourceId = 2;
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ActivationContext() : mActCtx(INVALID_HANDLE_VALUE) {}
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explicit ActivationContext(ActCtxResource aResource);
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explicit ActivationContext(HMODULE aLoadFromModule,
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WORD aResourceId = kDllManifestDefaultResourceId);
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ActivationContext(ActivationContext&& aOther);
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ActivationContext& operator=(ActivationContext&& aOther);
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ActivationContext(const ActivationContext& aOther);
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ActivationContext& operator=(const ActivationContext& aOther);
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~ActivationContext();
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explicit operator bool() const { return mActCtx != INVALID_HANDLE_VALUE; }
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#if defined(MOZILLA_INTERNAL_API)
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static Result<uintptr_t, HRESULT> GetCurrent();
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static HRESULT GetCurrentManifestPath(nsAString& aOutManifestPath);
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#endif // defined(MOZILLA_INTERNAL_API)
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private:
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void Init(ACTCTXW& aActCtx);
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void AddRef();
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void Release();
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private:
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HANDLE mActCtx;
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friend class ActivationContextRegion;
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};
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class MOZ_NON_TEMPORARY_CLASS ActivationContextRegion final {
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public:
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template <typename... Args>
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explicit ActivationContextRegion(Args&&... aArgs)
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: mActCtx(std::forward<Args>(aArgs)...), mActCookie(0) {
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Activate();
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}
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ActivationContextRegion();
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explicit ActivationContextRegion(const ActivationContext& aActCtx);
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ActivationContextRegion& operator=(const ActivationContext& aActCtx);
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explicit ActivationContextRegion(ActivationContext&& aActCtx);
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ActivationContextRegion& operator=(ActivationContext&& aActCtx);
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ActivationContextRegion(ActivationContextRegion&& aRgn);
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ActivationContextRegion& operator=(ActivationContextRegion&& aRgn);
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~ActivationContextRegion();
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explicit operator bool() const { return !!mActCookie; }
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ActivationContextRegion(const ActivationContextRegion&) = delete;
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ActivationContextRegion& operator=(const ActivationContextRegion&) = delete;
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bool Deactivate();
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private:
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void Activate();
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ActivationContext mActCtx;
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ULONG_PTR mActCookie;
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};
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} // namespace mscom
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} // namespace mozilla
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#endif // mozilla_mscom_ActivationContext_h
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