From 6c8f82901ccce71a1d2971cca8b447798ed6c095 Mon Sep 17 00:00:00 2001
From: Jon Trulson <jtrulson@ics.com>
Date: Tue, 8 Sep 2015 12:42:12 -0600
Subject: [PATCH] grovemoisture: 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/grovemoisture/grovemoisture.cxx | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/grovemoisture/grovemoisture.cxx b/src/grovemoisture/grovemoisture.cxx
index fdfb4511..2145b445 100644
--- a/src/grovemoisture/grovemoisture.cxx
+++ b/src/grovemoisture/grovemoisture.cxx
@@ -23,6 +23,8 @@
  */
 
 #include <iostream>
+#include <string>
+#include <stdexcept>
 
 #include "grovemoisture.h"
 
@@ -30,9 +32,9 @@ using namespace upm;
 
 GroveMoisture::GroveMoisture(int pin)
 {
-  mraa_init();
-
-  m_aio = mraa_aio_init(pin);
+  if ( !(m_aio = mraa_aio_init(pin)) )
+    throw std::invalid_argument(std::string(__FUNCTION__) +
+                                ": mraa_aio_init() failed, invalid pin?");
 }
 
 GroveMoisture::~GroveMoisture()