windows: add potentially absent function marker to mkwinsyscall

Some functions that x/sys/windows will eventually have won't be
available on older versions of Windows, and in general we can expect
Microsoft to continue to add functions to newer builds of Windows
10. Therefore, we introduces a new notation for marking functions that
might not exist, letting the caller handle the situation without a
panic.

Change-Id: Ia66bf4aab601357198872c5cd29b6ca7c3bc6969
Reviewed-on: https://go-review.googlesource.com/c/sys/+/269938
Run-TryBot: Jason A. Donenfeld <Jason@zx2c4.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Trust: Jason A. Donenfeld <Jason@zx2c4.com>
1 file changed
tree: 544d7833ec595871ba8f4aacd09669499852e528
  1. .gitattributes
  2. .gitignore
  3. AUTHORS
  4. CONTRIBUTING.md
  5. CONTRIBUTORS
  6. LICENSE
  7. PATENTS
  8. README.md
  9. codereview.cfg
  10. cpu/
  11. go.mod
  12. internal/
  13. plan9/
  14. unix/
  15. windows/
README.md

sys

This repository holds supplemental Go packages for low-level interactions with the operating system.

Download/Install

The easiest way to install is to run go get -u golang.org/x/sys. You can also manually git clone the repository to $GOPATH/src/golang.org/x/sys.

Report Issues / Send Patches

This repository uses Gerrit for code changes. To learn how to submit changes to this repository, see https://golang.org/doc/contribute.html.

The main issue tracker for the sys repository is located at https://github.com/golang/go/issues. Prefix your issue with “x/sys:” in the subject line, so it is easy to find.