ipa: raspberrypi: Return an error code from Algorithm::read()

When encountering errors, the Algorithm::read() function either uses
LOG(Fatal) or throws exceptions from the boost property_tree functions.
To prepare for replacing boost JSON parse with the YamlParser class,
give the Algorithm::read() function the ability to return an error code,
and propagate it all the way to the IPA module init() function.

All algorithm classes return a hardcoded 0 value for now, subsequent
commits will change that.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Naushir Patuck <naush@raspberrypi.com>
Tested-by: Naushir Patuck <naush@raspberrypi.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/ipa/raspberrypi/controller/pwl.h b/src/ipa/raspberrypi/controller/pwl.h
index 973efdf5..ef1cc2ed 100644
--- a/src/ipa/raspberrypi/controller/pwl.h
+++ b/src/ipa/raspberrypi/controller/pwl.h
@@ -57,7 +57,7 @@ public:
 	};
 	Pwl() {}
 	Pwl(std::vector<Point> const &points) : points_(points) {}
-	void read(boost::property_tree::ptree const &params);
+	int read(boost::property_tree::ptree const &params);
 	void append(double x, double y, const double eps = 1e-6);
 	void prepend(double x, double y, const double eps = 1e-6);
 	Interval domain() const;