allow stream.Read for streams that a RST was received for

and a lot of code improvements

fixes #385

utils/atomic_bool.go

@@ -0,0 +1,22 @@
+package utils
+
+import "sync/atomic"
+
+// An AtomicBool is an atomic bool
+type AtomicBool struct {
+	v int32
+}
+
+// Set sets the value
+func (a *AtomicBool) Set(value bool) {
+	var n int32
+	if value {
+		n = 1
+	}
+	atomic.StoreInt32(&a.v, n)
+}
+
+// Get gets the value
+func (a *AtomicBool) Get() bool {
+	return atomic.LoadInt32(&a.v) != 0
+}

utils/atomic_bool_test.go

@@ -0,0 +1,29 @@
+package utils
+
+import (
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+var _ = Describe("Atomic Bool", func() {
+	var a *AtomicBool
+
+	BeforeEach(func() {
+		a = &AtomicBool{}
+	})
+
+	It("has the right default value", func() {
+		Expect(a.Get()).To(BeFalse())
+	})
+
+	It("sets the value to true", func() {
+		a.Set(true)
+		Expect(a.Get()).To(BeTrue())
+	})
+
+	It("sets the value to false", func() {
+		a.Set(true)
+		a.Set(false)
+		Expect(a.Get()).To(BeFalse())
+	})
+})