Add Doom to hnsw index.

3 files changed, 41 insertions, 0 deletions

diff --git a/vespalib/src/vespa/vespalib/util/CMakeLists.txt b/vespalib/src/vespa/vespalib/util/CMakeLists.txt
index 91365d446c1..21642cbd842 100644
--- a/vespalib/src/vespa/vespalib/util/CMakeLists.txt
+++ b/vespalib/src/vespa/vespalib/util/CMakeLists.txt
@@ -31,6 +31,7 @@ vespa_add_library(vespalib_vespalib_util OBJECT
     exceptions.cpp
     execution_profiler.cpp
     executor_idle_tracking.cpp
+    fake_doom.cpp
     featureset.cpp
     file_area_freelist.cpp
     foregroundtaskexecutor.cpp
diff --git a/vespalib/src/vespa/vespalib/util/fake_doom.cpp b/vespalib/src/vespa/vespalib/util/fake_doom.cpp
new file mode 100644
index 00000000000..4ca71afd2c5
--- /dev/null
+++ b/vespalib/src/vespa/vespalib/util/fake_doom.cpp
@@ -0,0 +1,16 @@
+// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+
+#include "fake_doom.h"
+
+namespace vespalib {
+
+FakeDoom::FakeDoom(steady_time::duration time_to_doom)
+    : _time(steady_clock::now()),
+      _clock(_time),
+      _doom(_clock, _clock.getTimeNS() + time_to_doom)
+{
+}
+
+FakeDoom::~FakeDoom() = default;
+
+}
diff --git a/vespalib/src/vespa/vespalib/util/fake_doom.h b/vespalib/src/vespa/vespalib/util/fake_doom.h
new file mode 100644
index 00000000000..496129d8f0f
--- /dev/null
+++ b/vespalib/src/vespa/vespalib/util/fake_doom.h
@@ -0,0 +1,24 @@
+// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+
+#pragma once
+
+#include "doom.h"
+
+namespace vespalib {
+
+/*
+ * Class containing a fake doom controlled by the time_to_doom
+ * constructor argument.
+ */
+class FakeDoom {
+    std::atomic<steady_time> _time;
+    Clock                    _clock;
+    Doom                     _doom;
+public:
+    FakeDoom() : FakeDoom(1s) { }
+    FakeDoom(steady_time::duration time_to_doom);
+    ~FakeDoom();
+    const Doom& get_doom() const noexcept { return _doom; }
+};
+
+}