From a25bc71f3faf3f7ca4de9eda6342503768bf28ad Mon Sep 17 00:00:00 2001
From: SChernykh <sergey.v.chernykh@gmail.com>
Date: Tue, 20 Oct 2020 14:16:09 +0200
Subject: Make Blockchain::get_fee_quantization_mask() compile time

This also removes potential thread safety bug in that function.
---
 src/common/powerof.h | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 src/common/powerof.h

(limited to 'src/common')

diff --git a/src/common/powerof.h b/src/common/powerof.h
new file mode 100644
index 000000000..0f6c6254a
--- /dev/null
+++ b/src/common/powerof.h
@@ -0,0 +1,26 @@
+#pragma once
+
+#include <stdint.h>
+
+namespace tools
+{
+  template<uint64_t a, uint64_t b>
+  struct PowerOf
+  {
+    enum Data : uint64_t
+    {
+      // a^b = a * a^(b-1)
+      Value = a * PowerOf<a, b - 1>::Value,
+    };
+  };
+
+  template<uint64_t a>
+  struct PowerOf<a, 0>
+  {
+    enum Data : uint64_t
+    {
+      // a^0 = 1
+      Value = 1,
+    };
+  };
+}
-- 
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