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memory mapped files #458
Description
How do you create memory-mapped files in UWP? Even if it is a separate API I still think it would be worth mentioning here
Document Details
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- ID: b36404b8-4385-81d9-2ee8-486f0a55fc37
- Version Independent ID: 7b6ce4df-6ab2-3aa6-059f-b38aa9ea8062
- Content: Create, write, and read a file - UWP app developer
- Content Source: windows-apps-src/files/quickstart-reading-and-writing-files.md
- Service: unspecified
- GitHub Login: Lauren Hughes (@laurenhughes)
- Microsoft Alias: lahugh
Activity
laurenhughes commentedon Jun 13, 2018
adrianstephens, Thanks for your question! UWP apps are not currently allowed to use file mapping APIs.
bryaan commentedon Jun 13, 2018
Lauren Hughes (@laurenhughes) Is there any word on whether this kind of IPC is to be allowed at some point? I have no doubt companies are choosing to not use UWP precisely for these restrictions. If all we are doing is a desktop app is there a way to bypass?
laurenhughes commentedon Jun 13, 2018
Bryan Alexander Rivera (@bryaan), UWP support for Memory Mapped Files in some capacity is being considered by the product team. I'll pass your feedback along to the team as well! I don't believe there is a way to bypass the restriction even if your UWP app is only targeting desktop since it's a platform limitation.
bryaan commentedon Jun 14, 2018
Actually I think I found a way though BrokeredProxy but have not tried it yet. The platform limitation is one of security but not capability. It's understandable on mobile but not on Desktop. Many people want to build Desktop only, side-loaded is fine, apps using UWP, but those limits turn them away. Hope it's just a matter of time before the team gets green-light to allow full IPC, or at least for memory-mapped files.
Thanks!
local vars (#458)
soumyamahunt commentedon Aug 23, 2020
Creating MMF is supported in UWP, but you have to declare
codeGenerationcapability in your manifest. While the capability documentation mentions that, the MMF documentation doesn't mention it which causes confusion. Also, you can use your existing dotnet code for MMF as the support has been declared while back.Sync main and live (#458)