Tardigrade Backend: Dependencies

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

@@ -0,0 +1,75 @@
+// 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.
+
+// +build appengine
+
+package monkit
+
+import "sync"
+
+// TODO(jeff): make this mutex smaller scoped, perhaps based on the arguments
+// to compare and swap?
+var bigHonkinMutex sync.Mutex
+
+func loadFunc(addr **Func) (s *Func) {
+	bigHonkinMutex.Lock()
+	s = *addr
+	bigHonkinMutex.Unlock()
+	return s
+}
+
+func compareAndSwapFunc(addr **Func, old, new *Func) bool {
+	bigHonkinMutex.Lock()
+	val := *addr
+	if val == old {
+		*addr = new
+		bigHonkinMutex.Unlock()
+		return true
+	}
+	bigHonkinMutex.Unlock()
+	return false
+}
+
+func loadTraceWatcherRef(addr **traceWatcherRef) (val *traceWatcherRef) {
+	bigHonkinMutex.Lock()
+	val = *addr
+	bigHonkinMutex.Unlock()
+	return val
+}
+
+func storeTraceWatcherRef(addr **traceWatcherRef, val *traceWatcherRef) {
+	bigHonkinMutex.Lock()
+	*addr = val
+	bigHonkinMutex.Unlock()
+}
+
+func compareAndSwapSpanObserverTuple(addr **spanObserverTuple,
+	old, new *spanObserverTuple) bool {
+	bigHonkinMutex.Lock()
+	val := *addr
+	if val == old {
+		*addr = new
+		bigHonkinMutex.Unlock()
+		return true
+	}
+	bigHonkinMutex.Unlock()
+	return false
+}
+
+func loadSpanObserverTuple(addr **spanObserverTuple) (val *spanObserverTuple) {
+	bigHonkinMutex.Lock()
+	val = *addr
+	bigHonkinMutex.Unlock()
+	return val
+}