How to pass argument to thread pool function

Question

I tried to create a sample thread pool as below:

https://www.sololearn.com/compiler-playground/covRjcxiT4nn

This is working fine, but when I try to add an int type input to func, it does not work as below:

https://www.sololearn.com/compiler-playground/c44cZN9RJG8j

Answer 1

https://code.sololearn.com/c3RkVtjM4U8G/?ref=app

changes : line 43 ,46,108

you should pass function as argument not after evaluating it , as it will pass the returned value not function pointer to the thread pool ..

Answer 2

Ketan Lalcheta

actually i have no idea what youre trying to do ...

but the point is you shouldn't pass function after evaluating ...

for line 48 you could just store a map of std::function and its argument.

for line 43 jobFunc(0) here we should pass in something since it cant accept void .. i dunno what youre trying to do..

explain further because im a bit lazy to read full code ...

Answer 3

Link to code added into question description for mob app :

https://code.sololearn.com/covRjcxiT4nn/?ref=app
https://code.sololearn.com/c44cZN9RJG8j/?ref=app

Answer 4

Thanks ..

What about line 48 ?

fn(i);

Does it not call function ? We need to just pass it to queue...right ?

Answer 5

Also why 0 is passed on line 48 ?

jobFunc(0); // arg should be int not void ...

Answer 6

I got your point of not passing an evalualted fun ...

What i need to do is to call function as job with id I passed from main function

Answer 7

Basically for loop index i passed as argument should be used to call jobFun, not zero...how to get that int there