Add sanity check against going past 0.

3 files changed, 20 insertions, 1 deletions

diff --git a/searchcorespi/src/vespa/searchcorespi/index/CMakeLists.txt b/searchcorespi/src/vespa/searchcorespi/index/CMakeLists.txt
index c1e2b2f3dd1..1987304dc7e 100644
--- a/searchcorespi/src/vespa/searchcorespi/index/CMakeLists.txt
+++ b/searchcorespi/src/vespa/searchcorespi/index/CMakeLists.txt
@@ -8,6 +8,7 @@ vespa_add_library(searchcorespi_index OBJECT
     fusionrunner.cpp
     iindexmanager.cpp
     iindexcollection.cpp
+    index_disk_dir_active_state.cpp
     index_manager_explorer.cpp
     index_manager_stats.cpp
     indexcollection.cpp
diff --git a/searchcorespi/src/vespa/searchcorespi/index/index_disk_dir_active_state.cpp b/searchcorespi/src/vespa/searchcorespi/index/index_disk_dir_active_state.cpp
new file mode 100644
index 00000000000..603971c866e
--- /dev/null
+++ b/searchcorespi/src/vespa/searchcorespi/index/index_disk_dir_active_state.cpp
@@ -0,0 +1,15 @@
+// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+
+#include "index_disk_dir_active_state.h"
+#include <cassert>
+
+namespace searchcorespi::index {
+
+void
+IndexDiskDirActiveState::deactivate() noexcept
+{
+    assert(_active_count > 0u);
+    --_active_count;
+}
+
+}
diff --git a/searchcorespi/src/vespa/searchcorespi/index/index_disk_dir_active_state.h b/searchcorespi/src/vespa/searchcorespi/index/index_disk_dir_active_state.h
index 94363b0a113..ac84de5adee 100644
--- a/searchcorespi/src/vespa/searchcorespi/index/index_disk_dir_active_state.h
+++ b/searchcorespi/src/vespa/searchcorespi/index/index_disk_dir_active_state.h
@@ -1,6 +1,9 @@
 // Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+
 #pragma once
 
+#include <cstdint>
+
 namespace searchcorespi::index {
 
 /*
@@ -15,7 +18,7 @@ public:
     }
 
     void activate() noexcept { ++_active_count; }
-    void deactivate() noexcept { --_active_count; }
+    void deactivate() noexcept;
     bool is_active() const noexcept { return _active_count != 0; }
 };