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Implement threads on Zephyr (#19156)

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* pthreads setup for zephyr

- enable tweak stack size
- update lib/system/threads.nim
- Fix int/uint in casting pointer.

* add documentation and tweak flag names

* add documentation and tweak flag names

* fix configuration flag names

* fix configuration flag names

* cleanup

Co-authored-by: Jaremy Creechley <jaremy.creechley@panthalassa.com>
This commit is contained in:
Jaremy Creechley 2021-11-23 00:13:03 -08:00 • committed by GitHub
commit 7772ca303c
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3 changed files with 36 additions and 9 deletions
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9
doc/nimc.rst
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@ -681,6 +681,15 @@ nimMemAlignTiny
Sets `MemAlign` to `4` bytes which reduces the memory alignment
to better match some embedded devices.
Thread stack size
=================
Nim's thread API provides a simple wrapper around more advanced
RTOS task features. Customizing the stack size and stack guard size can
be done by setting `-d:nimThreadStackSize=16384` or `-d:nimThreadStackGuard=32`.
Currently only Zephyr and FreeRTOS support these configurations.
Nim for realtime systems
========================