From be24b2b3e3fdec1540885e69157fdfc2a6711ede Mon Sep 17 00:00:00 2001
From: Aaron Jacobs <jacobsa@google.com>
Date: Mon, 4 May 2015 22:00:24 +1000
Subject: [PATCH] Signal in flight.

---
 samples/interruptfs/interrupt_fs.go | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/samples/interruptfs/interrupt_fs.go b/samples/interruptfs/interrupt_fs.go
index 2229bf3..62554d1 100644
--- a/samples/interruptfs/interrupt_fs.go
+++ b/samples/interruptfs/interrupt_fs.go
@@ -142,6 +142,12 @@ func (fs *InterruptFS) ReadFile(
 	var err error
 	defer fuseutil.RespondToOp(op, &err)
 
+	// Signal that a read has been received.
+	fs.mu.Lock()
+	fs.readInFlight = true
+	fs.readInFlightChanged.Broadcast()
+	fs.mu.Unlock()
+
 	// Wait for cancellation.
 	done := op.Context().Done()
 	if done == nil {