Automatize addition of generator functions to algorithms

src/algorithms/CMakeLists.txt

@@ -24,6 +24,14 @@ MACRO(corryvreckan_algorithm name)
   # Add the current directory as include directory
   TARGET_INCLUDE_DIRECTORIES(${LIBNAME} PRIVATE ${CMAKE_CURRENT_SOURCE_DIR})
 
+  # Set the special header flags and add the special dynamic implementation file
+  TARGET_COMPILE_DEFINITIONS(${LIBNAME} PRIVATE CORRYVRECKAN_ALGORITHM_NAME=${name})
+  TARGET_COMPILE_DEFINITIONS(${LIBNAME} PRIVATE CORRYVRECKAN_ALGORITHM_HEADER="${name}.h")
+
+  TARGET_SOURCES(${LIBNAME} PRIVATE "${PROJECT_SOURCE_DIR}/src/core/dynamic_algorithm_impl.cpp")
+  SET_PROPERTY(SOURCE "${PROJECT_SOURCE_DIR}/src/core/dynamic_algorithm_impl.cpp" APPEND PROPERTY OBJECT_DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/${name}.h")
+  SET_PROPERTY(SOURCE "${PROJECT_SOURCE_DIR}/src/core/Algorithm.C" APPEND PROPERTY OBJECT_DEPENDS "${CMAKE_CURRENT_SOURCE_DIR}/${name}.h")
+
   # Link the standard allpix libraries
   TARGET_LINK_LIBRARIES(${LIBNAME} ${CORRYVRECKAN_LIBRARIES} ${CORRYVRECKAN_DEPS_LIBRARIES})
 

src/core/dynamic_algorithm_impl.cpp

+/**
+ * @file
+ * @brief Special file automatically included in the algorithm for the dynamic loading
+ *
+ * Needs the following names to be defined by the build system
+ * - CORRYVRECKAN_ALGORITHM_NAME: name of the module
+ * - CORRYVRECKAN_ALGORITHM_HEADER: name of the header defining the module
+ *
+ * @copyright Copyright (c) 2017 CERN and the Allpix Squared authors.
+ * This software is distributed under the terms of the MIT License, copied verbatim in the file "LICENSE.md".
+ * In applying this license, CERN does not waive the privileges and immunities granted to it by virtue of its status as an
+ * Intergovernmental Organization or submit itself to any jurisdiction.
+ */
+
+#ifndef CORRYVRECKAN_ALGORITHM_NAME
+#error "This header should only be automatically included during the build"
+#endif
+
+#include <memory>
+#include <utility>
+
+#include "core/config/Configuration.hpp"
+#include "core/utils/log.h"
+
+#include CORRYVRECKAN_ALGORITHM_HEADER
+
+namespace corryvreckan {
+  extern "C" {
+    Algorithm* corryvreckan_module_generator(Configuration config, Clipboard* clipboard);
+    Algorithm* corryvreckan_module_generator(Configuration config, Clipboard* clipboard) {
+      auto algorithm = new CORRYVRECKAN_ALGORITHM_NAME(std::move(config), clipboard); // NOLINT
+      return static_cast<Algorithm*>(algorithm);
+    }
+  }
+}