lib/connections: Add KCP support (fixes #804)

GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/3489

test/usage_windows.go

@@ -0,0 +1,28 @@
+// Copyright (C) 2014 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at http://mozilla.org/MPL/2.0/.
+
+// +build integration,benchmark,windows
+
+package integration
+
+import (
+	"log"
+	"os"
+	"syscall"
+	"time"
+)
+
+func ftToDuration(ft *syscall.Filetime) time.Duration {
+	n := int64(ft.HighDateTime)<<32 + int64(ft.LowDateTime) // in 100-nanosecond intervals
+	return time.Duration(n*100) * time.Nanosecond
+}
+
+func printUsage(name string, proc *os.ProcessState) {
+	if rusage, ok := proc.SysUsage().(*syscall.Rusage); ok {
+		log.Printf("%s: Utime: %s", name, ftToDuration(&rusage.UserTime))
+		log.Printf("%s: Stime: %s", name, ftToDuration(&rusage.KernelTime))
+	}
+}