interoperability? Don’t touch it! Glue code? Boiler plate? A nightmare? Application binary interface (ABI) Calling conventions Marshalling Was I supposed to free that? Was I not supposed to free post-1972 Common Object Model (COM) – 1993 Foreign function interface (libffi) – 1996 Simplified Wrapper and Interface Generator (SWIG) – 1996 JVM – Java Native Interface (JNI) – 1997 .NET – Platform Invoke (P/Invoke) dev- >get_data_from(); return d.a + d.b; The get_data_from() function returns the struct in registers, but the get_data_from() member function returns in caller provided memory. This is often unexpected

performance 2); Photo / image / chart Rust FFI Rust FFI (Foreign Function Interface) refers to the ability of Rust programming language to interface with code written in other languages, typically C or types of apps, this can help you reuse code libraries written in those languages. - JNI JNI is an interface that allows Java to interact with code written in another language. Motivation for JNI is code IOS - Rust targets for IOS - Build the static universal library for different target - Call the function on the swift code 利用 Rust 重塑移动应用开发 Photo / image / chart Rust 在 Keystone 业务上的实践 Rust Crypto

explicitly state what should be exported (e.g. classes, functions, …)  Separation into module interface files and module implementation files is possible but not needed  Can be structured with submodules Order of module imports is not important8 Modules  Create a module: // cppcon.cppm – Module Interface File export module cppcon; // Module declaration namespace CppCon { auto GetWelcomeHelper() { Tristan Brindle Thursday, September 17 • 12:00coroutines15 Coroutines  What’s a coroutine?  A function,  with one of the following:  co_await: suspends coroutine while waiting for another computation

Library  Changes to Ranges Library  Changes to Views Library  std::expected  std::move_only_function<>  std::spanstream  std::byteswap()  std::to_underlying()  Associative Containers Heterogeneous Library  Changes to Ranges Library  Changes to Views Library  std::expected  std::move_only_function<>  std::spanstream  std::byteswap()  std::to_underlying()  Associative Containers Heterogeneous Library  Changes to Ranges Library  Changes to Views Library  std::expected  std::move_only_function<>  std::spanstream  std::byteswap()  std::to_underlying()  Associative Containers Heterogeneous

Community by Daniel Havey35 Part V: Time Zones36 Time Zones ([time.zone]) • chrono now includes an interface for accessing the IANA time zone database. • This functionality requires several new types to the get_tzdb_list() function. Then you can access individual tzdbs from the list using the tzdb_list::const_iterator. • Alternatively, you can just use the get_tzdb() function which just returns

#include 时候是纯头文件，而 find_package(spdlog REQUIRED) 时却 变成预编译链接库的版本。（嗯，其实不是 PUBLIC 而是 INTERFACE ，因为伪对象没有实体） 和古代 CMake 做对比：为什么 PUBLIC 属性的传播机制如此便利 现代 CMake ： 古代 CMake ： 和 find_package(TBB cmake 没有独立作用域 • add_subdirectory 的 CMakeLists.txt 有独立作用域 • macro 没有独立作用域 • function 有独立作用域 • （因此 PARENT_SCORE 也可以用于 function 的返回值） • https://cmake.org/cmake/help/v3.16/command/set.html • https://blog

and conflicting parts • Layout compatibility; works with T within C structs • Near-identical interface • Encapsulates platform/architecture-specific code • atomic/atomic_ref support wait/notify_one/notify_all20 print(vector{7, 8, 9}); }24 Contiguous > Random-Access • Can we print(deque{-1, -1, -1}); ? • candidate function not viable: no known conversion from 'std::deque >' to 'const span

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objects that may be removed concurrently. SAFE RECLAMATION Concurrency TS2 Essential Hazard Pointer Interface Base class for protectable objects template class hazard_pointer_obj_base { void Doesn’t cover all retired objects. • Stronger: Seamlessly handles dependent retirement. Cohort Interface Hazard Pointer Synchronous Reclamation Beyond Concurrency TS2 – Maged Michael Base class for protectable make_hazard_pointer(); // Nonempty void swap(hazard_pointer&, hazard_pointer&) noexcept; Cohort Interface (preliminary) Hazard Pointer Synchronous Reclamation Beyond Concurrency TS2 – Maged Michael // Extend

specifier declares a function as being a kernel. Such a function is: • Executed on the device, • Callable from the host. The __device__ execution space specifier declares a function that is: • Executed nvidia.com/cuda/cuda-c-programming-guide/ index.html#function-declaration-specifiers 36 |The __host__ execution space specifier declares a function that is: • Executed on the host, • Callable from the declare a function with only the __host__ execution space specifier or to declare it without any of the __host__, __device__, or __global__ execution space specifier; in either case the function is compiled

with a function. upon_[error|done](sender, fn) → sender … transforms the error and done signals with a function. let_[value|…](sender, fn) → sender … passes the result of input sender to function, which std::move(work) ).value(); }50 SENDER/RECEIVER AND COROUTINES By returning a sender, an async function puts the choice of whether to use coroutines or not in the hands of the caller.51 COMING UP treated like a black box. goto is an unstructured control flow construct conditional loop function call goto59 FIRE-AND-FORGET TASK MODELS ARE UNSTRUCTURED Fire-and-forget work is like goto.