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

SetMap::Response> response); void generate_path_service( const std::shared_ptr request, std::shared_ptrResponse> response); bool SetMap::Response> response); void generate_path_service( const std::shared_ptr request, std::shared_ptrResponse> response); bool SetMap::Response> response); void generate_path_service( const std::shared_ptr request, std::shared_ptrResponse> response); bool

off the current thread? Delaying response to external events can have undesirable consequences:Why do we need to move work off the current thread? Delaying response to external events can have undesirable window if it doesn’t respond to eventsWhy do we need to move work off the current thread? Delaying response to external events can have undesirable consequences: Microsoft Windows will grey-out the entire doesn’t respond within a reasonable timeWhy do we need to move work off the current thread? Delaying response to external events can have undesirable consequences: Microsoft Windows will grey-out the entire

guaranteed response time ❖ Flexible Timing (5-10 milliseconds) ❖ ! A guaranteed response time Hard/Soft Real Time Requirements❖ Flexible Timing (5-10 milliseconds) ❖ ! A guaranteed response time constraints are extremely strict ❖ A guaranteed response time ❖ Microseconds❖ Timing constraints are extremely strict ❖ A guaranteed response time ❖ Microseconds ❖ Flight control system ❖ Flexible Flexible Timing (5-10 milliseconds) ❖ ! A guaranteed response time ❖ Milliseconds ❖ Home automation Hard/Soft Real Time RequirementsWhat level of time precision does our system require?What level

ms) { //... if(WRITE_FAIL == mSettingsFile.write(Setting::BackLight, ms.to_int()) { //error handling } // ... } #include "DiskDriver.h" #include "JSONParser.hpp" // many more includes enum error_code ms) { //... if(WRITE_FAIL == mSettingsFile.write(Setting::BackLight, ms.to_int()) { //error handling } // ... } #include "DiskDriver.h" #include "JSONParser.hpp" // many more includes enum error_code ActivationPayload activation; GenericBinaryPayload binary; DBAck database_ack; LocateRespPld locate_response; MailCheckPayload mail_check; PresetMessage preset; ReferencePointPayload reference_point; MapShare

iglberger@gmx.deContent 3 The Exception Situation How Do Exceptions Work Best Practices of Exception Handling When to Use Exceptions (And When Not) How to Use Exceptions The Exception Safety Guarantees Non-Exception-Safe CodeContent 4 The Exception Situation How Do Exceptions Work Best Practices of Exception Handling When to Use Exceptions (And When Not) How to Use Exceptions The Exception Safety Guarantees   Content 23 The Exception Situation How Do Exceptions Work Best Practices of Exception Handling When to Use Exceptions (And When Not) How to Use Exceptions The Exception Safety Guarantees

behaviours into the calculation. Obstacle avoidance, collision response, priority deferment, etc… Obstacle avoidance, collision response, priority deferment, etc…COMPOSABILITY FROM PRINCIPLES COMPOSABILITY because it allows us to compose structure directly without conditions in the handling code without conditions in the handling code.. We We don't have a dichotomy don't have a dichotomy between a leaf