pass argument in ServerContext::set_crit_path_elements by ref, add ServerContext::clear_crit_path_elements

Author: w0lek

vpr/src/base/vpr_context.h

@@ -577,7 +577,8 @@ class ServerContext : public Context {
     void set_path_type(const std::string& path_type) { path_type_ = path_type; }
     const std::string& path_type() const { return path_type_; }
 
-    void set_crit_path_elements(std::map<std::size_t, std::set<std::size_t>> crit_path_element_indexes) { crit_path_element_indexes_ = crit_path_element_indexes; }
+    void clear_crit_path_elements() { crit_path_element_indexes_.clear(); }
+    void set_crit_path_elements(const std::map<std::size_t, std::set<std::size_t>>& crit_path_element_indexes) { crit_path_element_indexes_ = crit_path_element_indexes; }
     std::map<std::size_t, std::set<std::size_t>> crit_path_element_indexes() const { return crit_path_element_indexes_; }
 
     void set_draw_crit_path_contour(bool draw_crit_path_contour) { draw_crit_path_contour_ = draw_crit_path_contour; }

vpr/src/server/taskresolver.cpp

@@ -101,7 +101,7 @@ void TaskResolver::processGetPathListTask(ezgl::application*, const TaskPtr& tas
     if (!options.hasErrors()) {
         ServerContext& server_ctx = g_vpr_ctx.mutable_server(); // shortcut
 
-        server_ctx.set_crit_path_elements(std::map<std::size_t, std::set<std::size_t>>{}); // reset selection if path list options has changed
+        server_ctx.clear_crit_path_elements(); // reset selection if path list options has changed
 
         // read options
         const int nCriticalPathNum = options.getInt(comm::OPTION_PATH_NUM, 1);