}

var http2DebugGoroutines = os.Getenv("DEBUG_HTTP2_GOROUTINES") == "1"

type http2goroutineLock uint64

func http2newGoroutineLock() http2goroutineLock {
	if !http2DebugGoroutines {
		return 0
	}
	return http2goroutineLock(http2curGoroutineID())
}

func (g http2goroutineLock) check() {
	if !http2DebugGoroutines {
		return
	}
	if http2curGoroutineID() != uint64(g) {