lcameraDev: Add session mgr lib for libcamera device binding

commonLibs/lcameraDev/cameraSession.cpp

@@ -0,0 +1,29 @@
+#include <cameraSession.h>
+#include <stdexcept>
+
+namespace lcamera_dev {
+
+CameraSession::CameraSession(
+	const CameraIdentityRecord& identity,
+	const std::shared_ptr<libcamera::Camera>& camera)
+:	s("lcameraDev::CameraSession", CameraSessionResources{identity, camera})
+{}
+
+void CameraSession::incrementRefcount()
+{
+	++s.rsrc.refcount;
+}
+
+bool CameraSession::decrementRefcount()
+{
+	if (s.rsrc.refcount <= 0)
+	{
+		throw std::logic_error(
+			"lcameraDev: releaseDeviceCReq refcount underflow");
+	}
+
+	--s.rsrc.refcount;
+	return s.rsrc.refcount == 0;
+}
+
+} // namespace lcamera_dev