How to make suspend function synchronized (thread-...

# coroutines

[Remon Shehata]

How to make suspend function synchronized (thread-safe)?

[Tower Guidev2]

mutex.withLock {}

[Tower Guidev2]

https://kotlin.github.io/kotlinx.coroutines/kotlinx-coroutines-core/kotlinx.coroutines.sync/-mutex/

[Remon Shehata]

I saw that was wondering if there is a better way

[Remon Shehata]

thanks

[Tower Guidev2]

i have used mutex in many situations and it works "A treat" 😉

[Tower Guidev2]

theres also
https://kotlin.github.io/kotlinx.coroutines/kotlinx-coroutines-core/kotlinx.coroutines.sync/-semaphore/index.html
however i have never used that 😄

[Remon Shehata]

if I were to use Mutex should the object be created inside the method or inside the class holding that method?

[Remon Shehata]

sorry for the noob question but I haven’t use it before :d

[gildor]

Could you show some example what you want to synchronize?

[Remon Shehata]

suspend fun foo(){} I want this function to be synchronized

[Remon Shehata]

does that make sense?

[ursus]

field, you need to share the mutex instance in order to do its thing

[ephemient]

what are you trying to protect from concurrency, there may be a better solution than synchronization

[ephemient]

synchronized functions are often a poor choice even in Java

[gildor]

yes, my question was about what you try to do concurrently

[Tower Guidev2]

in my case i have a "Manager" class that i employ to create and observe all my WorkManager background workers
i use mutex.withLock{} to ensure my worker chains are created, scheduled and observed in a "controlled" manner
as my users can trigger multiple worker chains concurrently