tree cc6bf443c95c5d10b1c93bd5d4150d364f18ff4e
parent ba4dc89169587bace188bf68e6a05798c5c8efde
author Jeff Genovy <29107334+jefgen@users.noreply.github.com> 1539626859 -0700
committer Jeff Genovy <29107334+jefgen@users.noreply.github.com> 1549408616 -0800

ICU-20204 ICU4C: Use the CreateFileMapping API for both the UWP version and Win32 versions.

- CreateFileMappingW is marked for both desktop and UWP apps, so we can call that in both code paths.
- We can use the W version of the CreateFileMapping API instead of A version since we pass a NULL for the name anyways.
- We can call the same API CreateFile[A|W] from both the UWP and Win32 versions of the code, reducing one of the UWP forks.
- Add a work-around for older versions of the Windows 10 SDK UWP headers.
- Remove the code that was creating a custom security descriptor (but setting everything to NULL) and pass null to the API directly. This way we will get the default security descriptor instead of the NULL dacl.
- Change to use nullptr instead of NULL in C++ code.