event/SocketMonitor: OnSocketReady() returns bool

src/event/BufferedSocket.cxx

@@ -202,21 +202,21 @@ BufferedSocket::ConsumeInput(size_t nbytes)
 	fifo_buffer_consume(input, nbytes);
 }
 
-void
+bool
 BufferedSocket::OnSocketReady(unsigned flags)
 {
 	assert(IsDefined());
 
 	if (gcc_unlikely(flags & (ERROR|HANGUP))) {
 		OnSocketClosed();
-		return;
+		return false;
 	}
 
 	if (flags & READ) {
 		assert(input == nullptr || !fifo_buffer_is_full(input));
 
 		if (!ReadToBuffer() || !ResumeInput())
-			return;
+			return false;
 
 		if (input == nullptr || !fifo_buffer_is_full(input))
 			ScheduleRead();
@@ -233,6 +233,8 @@ BufferedSocket::OnSocketReady(unsigned flags)
 		assert(!output.IsEmpty());
 
 		if (!WriteFromBuffer())
-			return;
+			return false;
 	}
+
+	return true;
 }

src/event/BufferedSocket.hxx

@@ -113,7 +113,7 @@ protected:
 	virtual void OnSocketClosed() = 0;
 
 private:
-	virtual void OnSocketReady(unsigned flags) override;
+	virtual bool OnSocketReady(unsigned flags) override;
 };
 
 #endif

src/event/SocketMonitor.hxx

@@ -115,7 +115,10 @@ public:
 	ssize_t Write(const void *data, size_t length);
 
 protected:
-	virtual void OnSocketReady(unsigned flags) = 0;
+	/**
+	 * @return false if the socket has been closed
+	 */
+	virtual bool OnSocketReady(unsigned flags) = 0;
 
 public:
 	/* GSource callbacks */