Hi,
sorry for late response. Your solution is very inspiration! I solved the
problem
with letting pango call entering go domain and lock on os thread, then back
to c domain.
Thank you very much!
cheers, changkun
On Saturday, September 29, 2018 at 6:16:10 PM UTC+2, Tamás Gulácsi wrote:
>
>
> 2018. szeptember 29., szombat 17:10:25 UTC+2 időpontban changkun a
> következőt írta:
>>
>>
>>
>> On Saturday, September 29, 2018 at 4:03:42 PM UTC+2, Tamás Gulácsi wrote:
>>>
>>> Create One (1) goroutine with LockOSThread and let it get the todo and
>>> response channel from a channel and send the response back when ready, and
>>> make all other goroutines communicate with this one and only one
>>> pango-dedicated goroutine. Which is locked to a thread.
>>>
>>
>> Can't do that at the moment, reason in above.
>>
>
> I tought something like:
>
> type todo struct {
> FuncToCall string
> Args []interface{}
> Response ch chan<- response
> }
> type response struct {
> ResultCode int
> Err error
> }
>
> var todoCh = make(chan todo)
>
> go func(ch <- todo) {
> runtime.LockOSThread()
> defer runtime.UnlockOSThread()
> for t := range ch {
> switch t.FuncToCall {
> ...
> }
> t.Response <- response{Err:nil, ResultCode:0}
> }
> }()
>
> func handleConnection(timeout) error {
> ch := make(chan response, 1)
> ctx, cancel := context.WithTimeout(context.Background(), timeout)
> defer cancel()
> select {
> case <-ctx.Done():
> // timeout
> return ctx.Err()
> case todoCh <- todo{FuncToCall:..., Response:ch}:
> select {
> case <-ctx.Done():
> return ctx.Err()
> case resp := <-ch:
> // success!
> return nil
> }
> }
> }
>
>
> I don't feel that abstracting out the C (Pango) calls into an interface
> with maybe several implementations (C or Go) would be such a great
> undertaking,
> but would ease up writing correct code.
>
> And anyway you have to call that Pango thing from one thread.
>
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