childCleanupWindows

fn childCleanupWindows(child: *process.Child) void {
    const handle = child.id orelse return;

    if (child.request_resource_usage_statistics) {
        var vmc: windows.PROCESS.VM_COUNTERS = undefined;
        switch (windows.ntdll.NtQueryInformationProcess(
            handle,
            .VmCounters,
            &vmc,
            @sizeOf(windows.PROCESS.VM_COUNTERS),
            null,
        )) {
            .SUCCESS => child.resource_usage_statistics.rusage = vmc,
            else => child.resource_usage_statistics.rusage = null,
        }
    }

    windows.CloseHandle(handle);
    child.id = null;

    windows.CloseHandle(child.thread_handle);
    child.thread_handle = undefined;

    if (child.stdin) |stdin| {
        windows.CloseHandle(stdin.handle);
        child.stdin = null;
    }
    if (child.stdout) |stdout| {
        windows.CloseHandle(stdout.handle);
        child.stdout = null;
    }
    if (child.stderr) |stderr| {
        windows.CloseHandle(stderr.handle);
        child.stderr = null;
    }
}