Tardigrade Backend: Dependencies

vendor/github.com/spacemonkeygo/monkit/v3/id.go

@@ -0,0 +1,48 @@
+// Copyright (C) 2015 Space Monkey, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package monkit
+
+import (
+	crand "crypto/rand"
+	"encoding/binary"
+	"math/rand"
+	"sync/atomic"
+
+	"github.com/spacemonkeygo/monkit/v3/monotime"
+)
+
+var (
+	idCounter uint64
+	inc       uint64
+)
+
+func init() {
+	var buf [16]byte
+	if _, err := crand.Read(buf[:]); err == nil {
+		idCounter = binary.BigEndian.Uint64(buf[0:8]) >> 1
+		inc = binary.BigEndian.Uint64(buf[0:8])>>1 | 3
+	} else {
+		rng := rand.New(rand.NewSource(monotime.Now().UnixNano()))
+		idCounter = uint64(rng.Int63())
+		inc = uint64(rng.Int63() | 3)
+	}
+}
+
+// NewId returns a random integer intended for use when constructing new
+// traces. See NewTrace.
+func NewId() int64 {
+	id := atomic.AddUint64(&idCounter, inc)
+	return int64(id >> 1)
+}