intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 29 insertions, 0 deletions

diff --git a/library/cpp/actors/util/queue_chunk.h b/library/cpp/actors/util/queue_chunk.h
new file mode 100644
index 0000000000..8a4e02d8cb
--- /dev/null
+++ b/library/cpp/actors/util/queue_chunk.h
@@ -0,0 +1,29 @@
+#pragma once
+
+#include "defs.h"
+
+template <typename T, ui32 TSize, typename TDerived>
+struct TQueueChunkDerived {
+    static const ui32 EntriesCount = (TSize - sizeof(TQueueChunkDerived*)) / sizeof(T);
+    static_assert(EntriesCount > 0, "expect EntriesCount > 0");
+
+    volatile T Entries[EntriesCount];
+    TDerived* volatile Next;
+
+    TQueueChunkDerived() {
+        memset(this, 0, sizeof(TQueueChunkDerived));
+    }
+};
+
+template <typename T, ui32 TSize>
+struct TQueueChunk {
+    static const ui32 EntriesCount = (TSize - sizeof(TQueueChunk*)) / sizeof(T);
+    static_assert(EntriesCount > 0, "expect EntriesCount > 0");
+
+    volatile T Entries[EntriesCount];
+    TQueueChunk* volatile Next;
+
+    TQueueChunk() {
+        memset(this, 0, sizeof(TQueueChunk));
+    }
+};