From 2f2b502813015732e78bfa2413f4673d855f8eaf Mon Sep 17 00:00:00 2001
From: Jon Trulson <jtrulson@ics.com>
Date: Wed, 9 Sep 2015 11:06:01 -0600
Subject: [PATCH] joystick12: throw exception(s) on fatal errors

Signed-off-by: Jon Trulson <jtrulson@ics.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
---
 src/joystick12/joystick12.cxx | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/src/joystick12/joystick12.cxx b/src/joystick12/joystick12.cxx
index 4e8f2455..b70557ca 100644
--- a/src/joystick12/joystick12.cxx
+++ b/src/joystick12/joystick12.cxx
@@ -23,6 +23,8 @@
  */
 
 #include <iostream>
+#include <string>
+#include <stdexcept>
 #include <unistd.h>
 #include <stdlib.h>
 #include <functional>
@@ -42,9 +44,20 @@ const int Joystick12::Y_right= 4070;
 
 
 Joystick12::Joystick12(int pinX, int pinY) {
-    mraa_result_t error;
-    m_joystickCtxX = mraa_aio_init(pinX);
-    m_joystickCtxY = mraa_aio_init(pinY);
+
+    if ( !(m_joystickCtxX = mraa_aio_init(pinX)) ) 
+      {
+        throw std::invalid_argument(std::string(__FUNCTION__) +
+                                    ": mraa_aio_init(pinX) failed, invalid pin?");
+        return;
+      }
+
+    if ( !(m_joystickCtxY = mraa_aio_init(pinY)) ) 
+      {
+        throw std::invalid_argument(std::string(__FUNCTION__) +
+                                    ": mraa_aio_init(pinY) failed, invalid pin?");
+        return;
+      }
 }
 
 Joystick12::~Joystick12() {