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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_ActivationContext_h
#define mozilla_mscom_ActivationContext_h
#include <utility>
#include "mozilla/Attributes.h"
#include "mozilla/mscom/ActCtxResource.h"
#if defined(MOZILLA_INTERNAL_API)
# include "mozilla/ResultVariant.h"
# include "nsString.h"
#endif // defined(MOZILLA_INTERNAL_API)
#include <windows.h>
namespace mozilla {
namespace mscom {
class ActivationContext final {
public:
// This is the default resource ID that the Windows dynamic linker searches
// for when seeking a manifest while loading a DLL.
static constexpr WORD kDllManifestDefaultResourceId = 2;
ActivationContext() : mActCtx(INVALID_HANDLE_VALUE) {}
explicit ActivationContext(ActCtxResource aResource);
explicit ActivationContext(HMODULE aLoadFromModule,
WORD aResourceId = kDllManifestDefaultResourceId);
ActivationContext(ActivationContext&& aOther);
ActivationContext& operator=(ActivationContext&& aOther);
ActivationContext(const ActivationContext& aOther);
ActivationContext& operator=(const ActivationContext& aOther);
~ActivationContext();
explicit operator bool() const { return mActCtx != INVALID_HANDLE_VALUE; }
#if defined(MOZILLA_INTERNAL_API)
static Result<uintptr_t, HRESULT> GetCurrent();
static HRESULT GetCurrentManifestPath(nsAString& aOutManifestPath);
#endif // defined(MOZILLA_INTERNAL_API)
private:
void Init(ACTCTXW& aActCtx);
void AddRef();
void Release();
private:
HANDLE mActCtx;
friend class ActivationContextRegion;
};
class MOZ_NON_TEMPORARY_CLASS ActivationContextRegion final {
public:
template <typename... Args>
explicit ActivationContextRegion(Args&&... aArgs)
: mActCtx(std::forward<Args>(aArgs)...), mActCookie(0) {
Activate();
}
ActivationContextRegion();
explicit ActivationContextRegion(const ActivationContext& aActCtx);
ActivationContextRegion& operator=(const ActivationContext& aActCtx);
explicit ActivationContextRegion(ActivationContext&& aActCtx);
ActivationContextRegion& operator=(ActivationContext&& aActCtx);
ActivationContextRegion(ActivationContextRegion&& aRgn);
ActivationContextRegion& operator=(ActivationContextRegion&& aRgn);
~ActivationContextRegion();
explicit operator bool() const { return !!mActCookie; }
ActivationContextRegion(const ActivationContextRegion&) = delete;
ActivationContextRegion& operator=(const ActivationContextRegion&) = delete;
bool Deactivate();
private:
void Activate();
ActivationContext mActCtx;
ULONG_PTR mActCookie;
};
} // namespace mscom
} // namespace mozilla
#endif // mozilla_mscom_ActivationContext_h
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