Device: Allow the suppression of disconnects from extensions

include/icsneo/api/lifetime.h

@@ -0,0 +1,34 @@
+#ifndef __ICSNEO_LIFETIME_H_
+#define __ICSNEO_LIFETIME_H_
+
+#include <functional>
+
+namespace icsneo {
+
+class Lifetime {
+public:
+	Lifetime() = default;
+	Lifetime(std::function<void(void)> onDeath) : fnOnDeath(onDeath) {}
+	~Lifetime() {
+		if(fnOnDeath)
+			fnOnDeath();
+	}
+
+	// Disallow copies so the fnOnDeath only happens once
+	Lifetime(const Lifetime&) = delete;
+	Lifetime& operator=(const Lifetime&) = delete;
+
+	// Explicitly allow moves
+	Lifetime(Lifetime&& moved) { *this = std::move(moved); }
+	Lifetime& operator=(Lifetime&& rhs) {
+		fnOnDeath = std::move(rhs.fnOnDeath);
+		rhs.fnOnDeath = std::function<void(void)>();
+		return *this;
+	}
+private:
+	std::function<void(void)> fnOnDeath;
+};
+
+}
+
+#endif