Re: FTR: JSR 292 RFEs from yesterday's Indy Support Group

2016-08-04 Thread John Rose 
On Aug 4, 2016, at 9:11 AM, Mark Roos  wrote:
> 
> With respect to general data in constant pools 
> 
> Adding raw bytes as a constant type would be a good thing.  I currently 
> have to encode my object serialization as hex utf8 which is not nice. 

+1

> As for the use of a MH to instantiate the constant.  Would this be done 
> at load time or would it just insert a ConstantCallSite to instantiate at 
> run time ( lazy )?  My two concerns would be that not everything is in 
> place at load time and the creation of lots of large constants which are 
> never used. 

The constant would be expanded when it is resolved, on first use.
That's the usual semantics for constants (like CONSTANT_MethodHandle).
So unused constants won't take up any space beyond their dormant
symbolic references.

— John
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Re: FTR: JSR 292 RFEs from yesterday's Indy Support Group

2016-08-04 Thread Mark Roos 
With respect to general data in constant pools

Adding raw bytes as a constant type would be a good
thing.  I currently
have to encode my object serialization as hex utf8
which is not nice.

As for the use of a MH to instantiate the constant.
 Would this be done
at load time or would it just insert a ConstantCallSite
to instantiate at
run time ( lazy )?  My two concerns would be
that not everything is in
place at load time and the creation of lots of large
constants which are
never used.

mark
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FTR: JSR 292 RFEs from yesterday's Indy Support Group

2016-08-02 Thread John Rose 
some frameworks need access delegation via MethodHandles.lookup
https://bugs.openjdk.java.net/browse/JDK-8162494

some frameworks want to advise method handle optimization
https://bugs.openjdk.java.net/browse/JDK-8163006

CallSites should support polymorphic inline caches
https://bugs.openjdk.java.net/browse/JDK-8163007
(THIS IS A PLACEHOLDER)

MethodHandles should have synchronization combinator
https://bugs.openjdk.java.net/browse/JDK-8163004

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