From fe38b38725d9d639f0e09f444e746c0bf2f8dc10 Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Sat, 20 Feb 2021 15:00:02 +0000
Subject: Add a non-threaded worker

Runs work immediately for when compiler doesn't support C++20 semaphore
---
 lib/worker.cpp | 10 ++++++----
 lib/worker.h   | 29 ++++++++++++++++++++++-------
 2 files changed, 28 insertions(+), 11 deletions(-)

diff --git a/lib/worker.cpp b/lib/worker.cpp
index 3c12caa..fd255c7 100644
--- a/lib/worker.cpp
+++ b/lib/worker.cpp
@@ -1,8 +1,9 @@
 #include "worker.h"
-#include "work.h"
-#include <algorithm>
-#include <iterator>
-#include <mutex>
+#if __cpp_lib_semaphore
+#	include "work.h"
+#	include <algorithm>
+#	include <iterator>
+#	include <mutex>
 
 Worker::Worker() : todoLen {0}
 {
@@ -44,3 +45,4 @@ Worker::worker()
 		j->doWork();
 	}
 }
+#endif
diff --git a/lib/worker.h b/lib/worker.h
index 5a13138..04e351b 100644
--- a/lib/worker.h
+++ b/lib/worker.h
@@ -1,14 +1,16 @@
 #ifndef WORKER_H
 #define WORKER_H
 
-#include <deque>
-#include <memory>
-#include <mutex>
-#include <semaphore>
-#include <special_members.hpp>
-#include <thread>
 #include <utility>
-#include <vector>
+
+#if __cpp_lib_semaphore
+#	include <deque>
+#	include <memory>
+#	include <mutex>
+#	include <semaphore>
+#	include <special_members.hpp>
+#	include <thread>
+#	include <vector>
 
 class Work;
 
@@ -43,4 +45,17 @@ private:
 	std::mutex todoMutex;
 };
 
+#else
+
+class Worker {
+public:
+	template<typename T, typename... Params>
+	void
+	addWork(Params &&... params)
+	{
+		T(std::forward<Params>(params)...).doWork();
+	}
+};
+
+#endif
 #endif
-- 
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