[go-nuts] calling back and forth of C++ and go functions

[sudarshan12s]

Hi, 
I am planning to replace C++ threadpool class with goroutines. I see 
several go implementations for threadpool. 

few are 
https://github.com/panjf2000/ants/

I am having issue, when i need to call back and forth . preferably, I need 
to keep C++ function has main. C++ function calls SubmitTask. Go library 
should call run with the ID i passed to SubmitTask.

Please let me know reference or links which could help me. 



// main.go

import "C"
func SubmitTaskHandler(workitem interface{}) {
    itemid := workitem.(int32)
    fmt.Println(itemid)
    tmp := C.int(itemid)
    C.run(tmp)
}
//export SubmitTask
func SubmitTask( x int32) {
    fmt.Println("GO called from C ")
    _ = pool.Invoke(int32(x))
}

func main() {
    defer ants.Release()
    var runTimes int32 = 1000
        for i := int32(0); i < runTimes; i++ {
            go SubmitTask(i)
        }

    fmt.Scanln()
        fmt.Println("done")
        fmt.Printf("running goroutines: %d\n", ants.Running())
        fmt.Printf("finish all tasks.\n")

}



test.c file:
#include "_cgo_export.h"
void submittask(int i)
{
    SubmitTask(i);
}


Regards,

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