Implement getMaxRss for Windows

[ghost]

closes#14956

As stated in the commit message, this is done using K32GetProcessMemoryInfo to get PeakWorkingSetSize.

Since GetProcessMemoryInfo is used in Psapi.dll (Or Kernel32.dll), I will try to issue a pull request later for a ntdll refactor to this function.

Edit: Switched to kernel32 for compatibility + psapi calls kernel32 anyway.

[kubkon]

Thanks for the PR! As I explained in #15039 do you think you could try implementing the kernel32 function yourself using only calls to ntdll?

[ghost]

Thanks for the PR! As I explained in #15039 do you think you could try implementing the kernel32 function yourself using only calls to ntdll?

Certainly. I wasn't initially sure if I should include it in this PR, but I was going to implement GetProcessMemoryInfo in ntdll later this week. But it is reasonable to include both as there is not really much refactor to be done.

Will update this PR as soon as I implement it.

[ghost]

I tested the GetProcessMemoryInfo implementation using this code:

conststd=@import("std");
constw=std.os.windows;
pubfnmain() !void {
conststdout_file=std.io.getStdOut().writer();
varbw=std.io.bufferedWriter(stdout_file);
conststdout=bw.writer();
constpHandle=w.kernel32.GetCurrentProcess();
varpmc: w.PROCESS_MEMORY_COUNTERS=undefined;
varpmc2: w.PROCESS_MEMORY_COUNTERS=undefined;
if (w.kernel32.K32GetProcessMemoryInfo(pHandle, &pmc, @sizeOf(w.PROCESS_MEMORY_COUNTERS)) !=0) {
trystdout.print("K32: MaxRss is {} Bytes!\n", .{pmc.PeakWorkingSetSize});
}
else {
trystdout.print("Something Went Wrong!\n", .{});
}
tryw.GetProcessMemoryInfo(pHandle, &pmc2);
trystdout.print("Nt: MaxRss is {} Bytes!\n", .{pmc2.PeakWorkingSetSize}); if (w.kernel32.K32GetProcessMemoryInfo(pHandle, &pmc, @sizeOf(w.PROCESS_MEMORY_COUNTERS)) !=0) {
trystdout.print("K32 Again: MaxRss is {} Bytes!\n", .{pmc.PeakWorkingSetSize});
} else {
trystdout.print("Something Went Wrong!\n", .{});
}
trybw.flush();
}

Both functions reported the same MaxRss.

[kubkon]

Could you take a final look at this @squeek502 and if you are happy with this I'll merge it?

[squeek502]

Looks good to me 👍