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Re: Coroutines package for U++ [message #59134 is a reply to message #59133]

Mon, 07 November 2022 20:30

peterh is currently offline

peterh
Messages: 108
Registered: November 2018
Location: Germany

Experienced Member

I understand it this way, C++20 coroutines are meant to write fast state machines in a simpler way.
In earlier times in plain old C longjump() could be (ab)used for this, but more complicated.

I have implemented sort of a coroutine in assembler for a device driver for an embedded device which had to handle XON/XOFF handshake and timeout properly without deadlock and I implemented the interrupt routine as a coroutine which was called by UART interrupt. This simplified the job a lot.

I do yet not understand, where does a C++ coroutine store its local variables?
On yield the stack is destroyed, so it must store the local variables elsewhere because these are persistent. (Local variables are still alive at the next invocation)

[Updated on: Mon, 07 November 2022 20:32]

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[Message index]

		Coroutines package for U++ By: Oblivion on Sat, 05 November 2022 12:19
		Re: Coroutines package for U++ By: Oblivion on Sun, 06 November 2022 20:20
		Re: Coroutines package for U++ By: Klugier on Sun, 06 November 2022 20:44
		Re: Coroutines package for U++ By: Oblivion on Sun, 06 November 2022 21:31
		Re: Coroutines package for U++ By: Lance on Mon, 07 November 2022 00:14
		Re: Coroutines package for U++ By: koldo on Mon, 07 November 2022 08:39
		Re: Coroutines package for U++ By: Oblivion on Mon, 07 November 2022 20:07
		Re: Coroutines package for U++ By: peterh on Mon, 07 November 2022 20:30
		Re: Coroutines package for U++ By: Oblivion on Mon, 07 November 2022 20:31
		Re: Coroutines package for U++ By: peterh on Tue, 08 November 2022 09:09
		Re: Coroutines package for U++ By: Oblivion on Wed, 09 November 2022 16:22
		Re: Coroutines package for U++ By: Oblivion on Wed, 09 November 2022 22:52
		Re: Coroutines package for U++ By: Lance on Wed, 09 November 2022 23:26
		Re: Coroutines package for U++ By: Lance on Sat, 12 November 2022 00:33
		Re: Coroutines package for U++ By: Oblivion on Sat, 12 November 2022 07:22
		Re: Coroutines package for U++ By: Lance on Sun, 13 November 2022 05:37
		Re: Coroutines package for U++ By: Lance on Mon, 14 November 2022 02:17
		Re: Coroutines package for U++ By: Oblivion on Mon, 14 November 2022 05:56
		Re: Coroutines package for U++ By: Lance on Mon, 14 November 2022 15:08
		Re: Coroutines package for U++ By: peterh on Mon, 07 November 2022 18:38
		Re: Coroutines package for U++ By: zsolt on Mon, 12 December 2022 13:48
		Re: Coroutines package for U++ By: Oblivion on Mon, 12 December 2022 17:42
		Re: Coroutines package for U++ By: zsolt on Mon, 12 December 2022 21:38

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