From a564258fb05fd8056e05d0fef753634bdecf0127 Mon Sep 17 00:00:00 2001
From: Jon Trulson <jtrulson@ics.com>
Date: Tue, 8 Sep 2015 16:36:48 -0600
Subject: [PATCH] biss0001: 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/biss0001/biss0001.cxx | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/biss0001/biss0001.cxx b/src/biss0001/biss0001.cxx
index 34111528..7f366a71 100644
--- a/src/biss0001/biss0001.cxx
+++ b/src/biss0001/biss0001.cxx
@@ -23,6 +23,8 @@
  */
 
 #include <iostream>
+#include <string>
+#include <stdexcept>
 
 #include "biss0001.h"
 
@@ -30,7 +32,12 @@ using namespace upm;
 
 BISS0001::BISS0001(int pin)
 {
-    m_gpio = mraa_gpio_init(pin);
+    if ( !(m_gpio = mraa_gpio_init(pin)) ) 
+      {
+        throw std::invalid_argument(std::string(__FUNCTION__) +
+                                    ": mraa_gpio_init() failed, invalid pin?");
+        return;
+      }
     mraa_gpio_dir(m_gpio, MRAA_GPIO_IN);
 }