Initial commit

vendor/github.com/cockroachdb/pebble/internal/cache/entry_invariants.go

@@ -0,0 +1,38 @@
+// Copyright 2020 The LevelDB-Go and Pebble Authors. All rights reserved. Use
+// of this source code is governed by a BSD-style license that can be found in
+// the LICENSE file.
+//
+//go:build (invariants && !race) || (tracing && !race)
+// +build invariants,!race tracing,!race
+
+package cache
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/cockroachdb/pebble/internal/invariants"
+)
+
+// When the "invariants" or "tracing" build tags are enabled, we need to
+// allocate entries using the Go allocator so entry.val properly maintains a
+// reference to the Value.
+const entriesGoAllocated = true
+
+func entryAllocNew() *entry {
+	e := &entry{}
+	// Note: this is a no-op if invariants and tracing are disabled or race is
+	// enabled.
+	invariants.SetFinalizer(e, func(obj interface{}) {
+		e := obj.(*entry)
+		if v := e.ref.refs(); v != 0 {
+			fmt.Fprintf(os.Stderr, "%p: cache entry has non-zero reference count: %d\n%s",
+				e, v, e.ref.traces())
+			os.Exit(1)
+		}
+	})
+	return e
+}
+
+func entryAllocFree(e *entry) {
+}