From 2600ba71ad52d3f43d3efd244493458567a7b457 Mon Sep 17 00:00:00 2001
From: Vojtech Bubnik <bubnikv@gmail.com>
Date: Tue, 2 May 2023 18:36:59 +0200
Subject: [PATCH] Fix of undefined hardware_destructive_interference_size

---
 src/libslic3r/TriangleMeshSlicer.cpp | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/libslic3r/TriangleMeshSlicer.cpp b/src/libslic3r/TriangleMeshSlicer.cpp
index 2c65702192..747f362153 100644
--- a/src/libslic3r/TriangleMeshSlicer.cpp
+++ b/src/libslic3r/TriangleMeshSlicer.cpp
@@ -36,6 +36,13 @@
 #include <boost/thread/mutex.hpp>
 #include <boost/thread/lock_guard.hpp>
 
+#ifdef __cpp_lib_hardware_interference_size
+    using std::hardware_destructive_interference_size;
+#else
+    // 64 bytes on x86-64 │ L1_CACHE_BYTES │ L1_CACHE_SHIFT │ __cacheline_aligned │ ...
+    constexpr std::size_t hardware_destructive_interference_size = 64;
+#endif
+
 // #define SLIC3R_DEBUG_SLICE_PROCESSING
 
 #ifdef SLIC3R_DEBUG_SLICE_PROCESSING
@@ -365,7 +372,7 @@ public:
 private:
     struct CacheLineAlignedMutex
     {
-        alignas(std::hardware_destructive_interference_size) std::mutex mutex;
+        alignas(hardware_destructive_interference_size) std::mutex mutex;
     };
     std::array<CacheLineAlignedMutex, 64> m_mutexes;
 };