在嵌入式实时环境中如何使用D？ [英] How would you approach using D in a embedded real-time environment?

问题描述

对于熟悉 D编程语言的所有人员，如何在嵌入式实时环境？我明白，它的原始设计不是实时嵌入式环境的目标，但是这个问题更多地是关于如何实现实时功能。

其中

你看到哪些结构将是一个问题？

有没有人成功地在嵌入式系统中使用它？

任何其他想法或建议都会很棒。

解决方案D不是真正用于实时应用程序，主要是因为D的某些语言功能依赖于其垃圾收集器，D的垃圾回收器是不可预测的，并且会零星地暂停您的程序来收集垃圾。 报价：

垃圾收集不是灵丹妙药。有一些缺点：

• 收集运行时不可预测，因此程序可以任意暂停。


• 集合运行所需的时间不受限制。虽然在实践中这是非常快的，这是不能保证。


• 收集器线程以外的所有线程必须在集合进行中停止。您仍然可以使用没有垃圾收集器的D（通过手动管理内存，如C / C ++） - 这将阻止您使用某些语言功能，如关联数组和库函数，内部分配内存，而不会取消分配/返回对它的引用。在许多不依赖内存管理的领域（如元编程），D仍然擅长。
  
  

  To all those familiar with D programming language, how would go about using it in a embedded real-time environment? I understand that it's original design is not targeted for real-time embedded environments, but this question is more about how would you go about making real-time capability happen.

  Which constructs of the language would be indispensable?

  Which constructs do you see would be a problem?

  Has anyone successfully used it in a embedded system?

  Any other thoughts or suggestions would be great.

  解决方案

  D isn't really meant for use in real-time applications, mostly because some language features of D rely on its garbage collector, and D's garbage collector is unpredictable and will sporadically pause your program to collect garbage. Quoting:

  Garbage collection is not a panacea. There are some downsides:

  • It is not predictable when a collection gets run, so the program can arbitrarily pause.
  • The time it takes for a collection to run is not bounded. While in practice it is very quick, this cannot be guaranteed.
  • All threads other than the collector thread must be halted while the collection is in progress.

  You can still use D without a garbage collector (by managing memory manually, like in C/C++) - this will prevent you from using certain language features like associative arrays, and library functions that internally allocate memory without deallocating/returning a reference to it. D still excels in many areas not dependent on memory management (such as metaprogramming).

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