# Semaphore with permit id?
**URL:** https://discourse.julialang.org/t/semaphore-with-permit-id/82142
**Category:** Performance
**Tags:** multithreading, threads
**Created:** [June 2, 2022, 3:34pm UTC](https://discourse.julialang.org/t/semaphore-with-permit-id/82142 "2022-06-02T15:34:24Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@Joris\_Pinkse](https://discourse.julialang.org/u/Joris_Pinkse)
#### Post date: [June 2, 2022, 3:34pm UTC](https://discourse.julialang.org/t/semaphore-with-permit-id/82142/1 "2022-06-02T15:34:24Z")
I’d like to use a Semaphore like object with say four permits, where a call to acquire would tell me which of the four permits was assigned and a call to release would release that specific permit. I understand that Semaphore just keeps a tally. What would be the easiest way of achieving this, preferably without using any third party packages? Thanks!!
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### Author:  [@Joris\_Pinkse](https://discourse.julialang.org/u/Joris_Pinkse)
#### Post date: [June 7, 2022, 2:50am UTC](https://discourse.julialang.org/t/semaphore-with-permit-id/82142/2 "2022-06-07T02:50:44Z")
Well, there is now. See [https://github.com/NittanyLion/Smartphores.jl](https://github.com/NittanyLion/Smartphores.jl)