From 5ffe3773d4a9b4726288b266725235d4c6f24b94 Mon Sep 17 00:00:00 2001
From: Max Kellermann <max@duempel.org>
Date: Thu, 10 Mar 2016 22:37:33 +0100
Subject: [PATCH] event/MaskMonitor: add variant with bound method

---
 src/event/MaskMonitor.hxx | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/src/event/MaskMonitor.hxx b/src/event/MaskMonitor.hxx
index db6803bbf..3abb46ab2 100644
--- a/src/event/MaskMonitor.hxx
+++ b/src/event/MaskMonitor.hxx
@@ -22,6 +22,7 @@
 
 #include "check.h"
 #include "DeferredMonitor.hxx"
+#include "util/BoundMethod.hxx"
 
 #include <atomic>
 
@@ -50,4 +51,22 @@ protected:
 	void RunDeferred() override;
 };
 
+/**
+ * A variant of #MaskMonitor which invokes a bound method.
+ */
+template<typename T>
+class CallbackMaskMonitor final : public MaskMonitor {
+	BoundMethod<T, void, unsigned> callback;
+
+public:
+	template<typename... Args>
+	explicit CallbackMaskMonitor(EventLoop &_loop, Args&&... args)
+		:MaskMonitor(_loop), callback(std::forward<Args>(args)...) {}
+
+protected:
+	void HandleMask(unsigned mask) override {
+		callback(mask);
+	}
+};
+
 #endif