The Absurdity of Error Handling: Finding a Purpose for Errors in Safety-Critical SYCL Erik Tomusk CppCon 2023 October 5, 2023© 2023 Codeplay Software Ltd. Codeplay Corporate Slide 2© 2023 Codeplay explicitly stated© 2023 Codeplay Software Ltd. Outline • Definition of Safety • Definition of Error Handling • Case Study • Why is this Important? • Is it Really so bad? • What does this mean for SYCL execution time (in mainstream compilers) 17Definition of Error Handling 18© 2023 Codeplay Software Ltd. Definition of Error Handling • Exceptions and error codes are sometimes used for reporting or

Message Handling with Boolean Algebra Ben Deane / CppCon / 2024-09-16 1Alternative Title "The Unreasonable Effectiveness of Boolean Algebra in Software Design, Showing the Particular Application of of a Message Handling Library, with an Excursion into the Roots of Programming" 2Frontmatter No AI/LLM was used in the creation of this talk. Code is simplified for slides; may have some errors in ] SVG diagrams for resolution-independence 4What this talk is about The workings of a message-handling library. How messages and the fields in them are specified. Efficiently identifying (with matchers)

Modern C++ Handling Phil Nash Error2018 2019series disappointments of a (total) Part 1int parse_int(std::string_view number)// TODO: +, -, digit separators? int acc = 0; for(char c versions Correct-by-construction Throwing violation-handler No noexcept PreconditionsModern C++ Handling Phil Nash Error

Design patterns for error handling in C++ programs using parallel algorithms and executors Mark Hoemmen* mhoemmen@stellarscience.com CppCon 2020 * hoʊ’mən, or hœm’mən; he/himWho am I? • > 10 years Started new job at Stellar Science in March Eschew raw pointersOutline • Parallelism makes error handling harder… • …C++ parallel algorithms and tasks specifically • Message Passing Interface (MPI): 3 decades Jurvetson)Parallel hinders error handling • … because parallelism relaxes execution order – Deliberately, to improve performance • Errors interrupt execution; handling constrains order • Errors could

The robot knows its location in the occupancy map at all times ● Solution: The robot will send a request to a ROS 2 service that generates a path from the robot’s current location and goal location, ::SetMap::Request> request, std::shared_ptr response); void generate_path_service( const std::shared_ptrRequest> request, std::sha ::SetMap::Request> request, std::shared_ptr response); void generate_path_service( const std::shared_ptrRequest> request, std::sha

your code in the same way you would if it were synchronous. This is especially important for error handling, since try/except blocks work as you would expect in coroutines while this is difficult to achieve RequestHandler for all your specific handlers. Handling request input The request handler can access the object representing the current request with self.request. See the class definition for HTTPServerRequest HTTPServerRequest for a complete list of attributes. Request data in the formats used by HTML forms will be parsed for you and is made available in methods like get_query_argument and get_body_argument. class

polls via the apphook instead, but if you leave it there, it will conflict with the apphook’s URL handling. You’ll receive a warning in the logs: URL namespace 'polls' isn't unique. You may not be able to is_current_app: return [...] The is_current_app flag tells us if the function handling this view (e.g. the list of polls) belongs to the same application as the one responsible for this ): name = _("Polls Menu") # give the menu a name this is required. def get_nodes(self, request): """ This method is used to build the menu tree. """ nodes = []

polls via the apphook instead, but if you leave it there, it will conflict with the apphook’s URL handling. You’ll receive a warning in the logs: URL namespace 'polls' isn't unique. You may not be able to is_current_app: return [...] The is_current_app flag tells us if the function handling this view (e.g. the list of polls) belongs to the same application as the one responsible for this ): name = _("Polls Menu") # give the menu a name this is required. def get_nodes(self, request): """ This method is used to build the menu tree. """ nodes = []

main coroutine The Application object Subclassing RequestHandler Handling request input Overriding RequestHandler methods Error Handling Redirection Asynchronous handlers Templates and UI Configuring and security Cookies and signed cookies User authentication Third party authentication Cross-site request forgery protection DNS Rebinding Running and deploying Processes and ports Running behind a load your code in the same way you would if it were synchronous. This is especially important for error handling, since try/except blocks work as you would expect in coroutines while this is difficult to achieve

polls via the apphook instead, but if you leave it there, it will conflict with the apphook’s URL handling. You’ll receive a warning in the logs: URL namespace 'polls' isn't unique. You may not be able to populate(self): if not self.is_current_app: return [...] The is_current_app flag tells us if the function handling this view (e.g. the list of polls) belongs to the same appli- cation as the one responsible for PollsMenu(CMSAttachMenu): name = _("Polls Menu") # give the menu a name this is required. def get_nodes(self, request): """ This method is used to build the menu tree. """ nodes = [] for poll in Poll.objects.all():