Tardigrade Backend: Dependencies

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

@@ -0,0 +1,35 @@
+// 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 (
+	"runtime"
+	"sync/atomic"
+)
+
+type spinLock uint32
+
+func (s *spinLock) Lock() {
+	for {
+		if atomic.CompareAndSwapUint32((*uint32)(s), 0, 1) {
+			return
+		}
+		runtime.Gosched()
+	}
+}
+
+func (s *spinLock) Unlock() {
+	atomic.StoreUint32((*uint32)(s), 0)
+}