Synchronized functions

[Hannes Wallnoefer]

I guess addition to mozilla_compat would be ok. Can you please file a 
bug for this at https://bugs.openjdk.java.net/?

Thanks,
Hannes

Am 2013-10-11 11:28, schrieb Tal Liron:
> The Scripturian environment is designed for multi-threadedness and 
> does the "right thing" in terms of Nashorn contexts/globals to ensure 
> separation. In concurrent environments, using locks can be useful. 
> Might not the best choice for high concurrency, but it sometimes it's 
> necessary, especially when working with 3rd party libraries.
>
> It would be nice if "sync" were added to mozilla_compat. Isn't the 
> whole point of it to support legacy code?
>
> On 10/11/2013 05:23 PM, Hannes Wallnoefer wrote:
>> Actually Rhino exposes a "sync" function for this purpose, 
>> org.mozilla.javascript.Synchronizer is just the class implementing 
>> this feature and not meant to be used directly by scripts.
>>
>> While you could do something like this in Nashorn I would advise 
>> against it. Thread-safety is not one of the primary design goals in 
>> Nashorn, and nowadays most people would agree that there are better 
>> and safer ways for working with threads. I suggest looking at 
>> Worker/Actor models where you have multiple script engines working 
>> together through message passing.
>>
>> Hannes
>>
>> Am 2013-10-11 10:45, schrieb Tal Liron:
>>> Thanks!
>>>
>>> Would it be possible to add this to mozilla_compat.js so that "new 
>>> org.mozilla.javascript.Synchronizer(myFunction)" would work?
>>>
>>> On 10/11/2013 03:31 PM, A. Sundararajan wrote:
>>>> There is a 'sync' function in a demo application (jconsole script 
>>>> plugin).  This may be of use.
>>>>
>>>>     var sync = function(func, obj) {
>>>>         if (arguments.length < 1 || arguments.length > 2 ) {
>>>>             throw "sync(function [,object]) parameter count mismatch";
>>>>         }
>>>>
>>>>         var syncobj = (arguments.length == 2 ? obj : this);
>>>>
>>>>         if (!syncobj._syncLock) {
>>>>             syncobj._syncLock = new Lock();
>>>>         }
>>>>
>>>>         return function() {
>>>>             syncobj._syncLock.lock();
>>>>             try {
>>>>                 func.apply(null, arguments);
>>>>             } finally {
>>>>                 syncobj._syncLock.unlock();
>>>>             }
>>>>         };
>>>>     };
>>>>
>>>> See also: 
>>>> https://blogs.oracle.com/nashorn/entry/nashorn_multi_threading_and_mt
>>>>
>>>> -Sundar
>>>>
>>>> On Thursday 10 October 2013 03:16 PM, Tal Liron wrote:
>>>>> How does one create synchronized functions in Nashorn?
>>>>>
>>>>> Rhino has this facility:
>>>>>
>>>>> function myFunction() { ... }
>>>>> myFunction = new org.mozilla.javascript.Synchronizer(myFunction)
>>>>
>>>
>>
>