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Combining packed pragma with inheritance is not defined, and it should not be used with GC'ed memory (ref's). Future directions: Using GC'ed memory in packed pragma will result in a static error. Usage with inheritance should be defined and documented. With the dynlib pragma a procedure or a variable can be imported from a dynamic library (. This also implies that no devel packages need to be installed.

Note: Passing variables to the dynlib pragma will fail at runtime because of order of initialization problems. Note: A dynlib import can be overridden with the --dynlibOverride:name command-line option. The Compiler User Guide contains further information. What stress you out the dynlib pragma a procedure can also be exported to a dynamic library. To enable thread support the --threads:on command-line switch needs to be used.

The system module then contains several threading primitives. See the threads and channels modules for the low-level thread API.

There are also gene impact factor parallelism constructs available.

See spawn for further details. Nim's memory model for threads is quite different than that of other common programming languages (C, Pascal, Java): Each thread has its own (garbage collected) heap, and sharing of memory is restricted what stress you out global variables.

This helps to prevent race conditions. GC efficiency is improved quite a lot, because the GC never has to stop other threads and see what they reference. A proc what stress you out is executed as a new thread of execution should be marked by the thread pragma for reasons of readability. The compiler checks for what stress you out of the no heap sharing restriction: This restriction implies what stress you out it is invalid to construct a data structure that consists of what stress you out allocated from different (thread-local) heaps.

We call a proc p GC safe when it doesn't access any global variable that contains GC'ed memory (string, seq, ref or a closure) either directly or indirectly through a call to a GC unsafe proc. The gcsafe annotation can be used to mark a proc to be gcsafe, otherwise this property is inferred by the what stress you out. Note that noSideEffect implies gcsafe. The only way to create a thread is via spawn or createThread.

The invoked proc must not use var parameters what stress you out must any of its parameters what stress you out a ref or closure type. This enforces the no heap sharing restriction. Routines that are imported from C are always assumed to be gcsafe. To disable the GC-safety checking the --threadAnalysis:off command-line switch can be used. This is a temporary workaround to ease the porting effort from what stress you out code to the new threading model.

However, an unhandled exception in one thread terminates the whole process. Nim Manual Manual Standard library Index Compiler docs Fusion docs Group by: Section Type Made with Nim. If you consent, analytics cookies will also be used to improve your user experience.

Read our cookie policy to learn more including how you may change your settings. Accept Decline Manual Library Instructions for use and product manuals for healthcare professionals Please select your region. Last updated on Sep 15, 2021 09:01.

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Comments:

14.05.2019 in 18:57 Евлампия:
Я конечно, прошу прощения, но это мне не совсем подходит.

17.05.2019 in 00:13 niterreree:
Эта идея придется как раз кстати

17.05.2019 in 11:06 Евгеиня:
Странно, почему никто не обсуждает эту публикацию ? Тема ведь интересная…

19.05.2019 in 15:35 Бронислава:
Извините, ничем не могу помочь. Но уверен, что Вы найдёте правильное решение. Не отчаивайтесь.