From 4c7c5da22538bc8b11b3393418bfc057a4336769 Mon Sep 17 00:00:00 2001
From: Martin Ridgers <martin.ridgers@epicgames.com>
Date: Thu, 2 Dec 2021 16:01:50 +0100
Subject: Fake concrt for non-Windows platforms

---
 zen/chunk/chunk.cpp | 42 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)

diff --git a/zen/chunk/chunk.cpp b/zen/chunk/chunk.cpp
index 866372654..e4dfd2a36 100644
--- a/zen/chunk/chunk.cpp
+++ b/zen/chunk/chunk.cpp
@@ -33,6 +33,48 @@
 
 //////////////////////////////////////////////////////////////////////////
 
+#if ZEN_PLATFORM_LINUX || ZEN_PLATFORM_MAC
+
+namespace Concurrency
+{
+
+template <typename IterType, typename LambdaType> void
+parallel_for_each(IterType Cursor, IterType End, const LambdaType& Lambda)
+{
+	for (; Cursor < End; ++Cursor)
+	{
+		Lambda(*Cursor);
+	}
+}
+
+template <typename T>
+struct combinable
+{
+	T& local()
+	{
+		return Value;
+	}
+
+	template <typename LambdaType> void combine_each(const LambdaType& Lambda)
+	{
+		Lambda(Value);
+	}
+
+	T Value = {};
+};
+
+struct task_group
+{
+	void run(...) {}
+	void wait() {}
+};
+
+} // namespace Concurrency
+
+#endif // ZEN_PLATFORM_LINUX || ZEN_PLATFORM_MAC
+
+//////////////////////////////////////////////////////////////////////////
+
 namespace detail {
 static const uint32_t buzhashTable[] = {
 	0x458be752, 0xc10748cc, 0xfbbcdbb8, 0x6ded5b68, 0xb10a82b5, 0x20d75648, 0xdfc5665f, 0xa8428801, 0x7ebf5191, 0x841135c7, 0x65cc53b3,
-- 
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