[VOL-4291] OfAgent changes for gRPC migration
Change-Id: I8da1db6df49d478ef24ec8f9bd719e9692f48a7f
diff --git a/vendor/github.com/google/uuid/version4.go b/vendor/github.com/google/uuid/version4.go
index 84af91c..7697802 100644
--- a/vendor/github.com/google/uuid/version4.go
+++ b/vendor/github.com/google/uuid/version4.go
@@ -14,11 +14,21 @@
return Must(NewRandom())
}
+// NewString creates a new random UUID and returns it as a string or panics.
+// NewString is equivalent to the expression
+//
+// uuid.New().String()
+func NewString() string {
+ return Must(NewRandom()).String()
+}
+
// NewRandom returns a Random (Version 4) UUID.
//
// The strength of the UUIDs is based on the strength of the crypto/rand
// package.
//
+// Uses the randomness pool if it was enabled with EnableRandPool.
+//
// A note about uniqueness derived from the UUID Wikipedia entry:
//
// Randomly generated UUIDs have 122 random bits. One's annual risk of being
@@ -27,8 +37,16 @@
// equivalent to the odds of creating a few tens of trillions of UUIDs in a
// year and having one duplicate.
func NewRandom() (UUID, error) {
+ if !poolEnabled {
+ return NewRandomFromReader(rander)
+ }
+ return newRandomFromPool()
+}
+
+// NewRandomFromReader returns a UUID based on bytes read from a given io.Reader.
+func NewRandomFromReader(r io.Reader) (UUID, error) {
var uuid UUID
- _, err := io.ReadFull(rander, uuid[:])
+ _, err := io.ReadFull(r, uuid[:])
if err != nil {
return Nil, err
}
@@ -36,3 +54,23 @@
uuid[8] = (uuid[8] & 0x3f) | 0x80 // Variant is 10
return uuid, nil
}
+
+func newRandomFromPool() (UUID, error) {
+ var uuid UUID
+ poolMu.Lock()
+ if poolPos == randPoolSize {
+ _, err := io.ReadFull(rander, pool[:])
+ if err != nil {
+ poolMu.Unlock()
+ return Nil, err
+ }
+ poolPos = 0
+ }
+ copy(uuid[:], pool[poolPos:(poolPos+16)])
+ poolPos += 16
+ poolMu.Unlock()
+
+ uuid[6] = (uuid[6] & 0x0f) | 0x40 // Version 4
+ uuid[8] = (uuid[8] & 0x3f) | 0x80 // Variant is 10
+ return uuid, nil
+}