You can do it with something like this
uint32_t objID = ++globalID;
val someJSObject;
val::global("MyObjectTracker")[objID] = someJSObject;
EM_ASM_INT({
var objToUse = MyObjectTracker[$0];
}, objID);
On Friday, July 1, 2016 at 4:44:51 AM UTC-7, Reuben Scratton wrote:
>
> Thanks for the reply juj, any chance you could point me to an example of
> how to do this? Am afraid I just can't work it out.
>
> I am also wanting to pass JS objects as parameters to Runtime.dynCall()
> and store them in vals on the C++ side... presumably once I understand
> manual marshalling this will be easy.
>
>
> On Tuesday, June 21, 2016 at 12:59:51 PM UTC+1, jj wrote:
>>
>> I think we don't currently have anything built-in for that, but you
>> should marshall the object manually, e.g. by managing a table or other
>> location where the object exists, and referencing that object via an int.
>>
>> 2016-06-20 19:06 GMT+03:00 Reuben Scratton <reuben....@gmail.com>:
>>
>>> Hi,
>>>
>>> I'd like to pass a reference to a javascript object into an EM_ASM_
>>> block, i.e :
>>>
>>> {
>>> val jsObj = ... whatever ...;
>>>
>>> EM_ASM_ ({
>>> var obj = $0;
>>> ...
>>> }, jsObj);
>>>
>>> }
>>>
>>> But the compiler won't let me do this... it seems only trivial values
>>> (ints and doubles and strings) are allowed to go in and out of the js block.
>>>
>>> What are my options here? The js object in question can actually be
>>> created inside the block but I do need to hold a long-lived reference to it
>>> from the C++ world. It'd be helpful if there was an EM_ASM_OBJ macro so I
>>> could simply return it to the C++ side...
>>>
>>> Many thanks,
>>>
>>>
>>> Reuben
>>>
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>>
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