Java-Gaming.org Hi !
Featured games (83)
games approved by the League of Dukes
Games in Showcase (541)
Games in Android Showcase (133)
games submitted by our members
Games in WIP (603)
games currently in development
News: Read the Java Gaming Resources, or peek at the official Java tutorials
 
    Home     Help   Search   Login   Register   
Pages: 1 [2]
  ignore  |  Print  
  JStackAlloc - stack allocation of "value" objects in Java  (Read 38405 times)
0 Members and 1 Guest are viewing this topic.
Offline jezek2
« Reply #30 - Posted 2011-03-08 03:59:20 »

Finally decided to add support for annotations for stack allocations, yay Smiley This will solve compilation problems for JBullet users and make this library (JStackAlloc) more usable on it's own as the bytecode modification will be optional. My previous stance about not recommending using it unless really necessary still applies though.

The old way will continue to work to anyone who wants it. After a bit of researching, the only option with annotations will be in this form:

1  
@StackAlloc Vector3f vec = new Vector3f();


It will also allow to take any arguments (not just one of the same type like now), in that case the corresponding 'set' method will be used (similarly as in the old way). The ability to "directly" allocate output parameters, like this:

1  
Vector3f avg = average(v1, v2, Stack.alloc(Vector3f.class));


isn't (currently) possible with annotations, so that won't be supported. In JBullet code base it will probably lead to slightly better utilization of such temporary objects as in some cases these temporary objects could be reused when allocating them explicitly through local variable declarations.

However, the bytecode modification is not sufficient to make this work as local variables annotations aren't exported to the bytecode. After a bit of researching, it seems it's doable by using annotation processor (which can be passed as an option to javac). There is no standard way to modify the classes, only by using compiler (javac) specific classes, like the Project Lombok is doing.
Offline Roquen
« Reply #31 - Posted 2011-03-08 14:18:34 »

FYI: I haven't looked into it, and it probably isn't of great interest since it would be eclipse specific, but there is a weaving framework for eclipse for performing these kinds of transforms.
Pages: 1 [2]
  ignore  |  Print  
 
 
You cannot reply to this message, because it is very, very old.

 

Add your game by posting it in the WIP section,
or publish it in Showcase.

The first screenshot will be displayed as a thumbnail.

Mr.CodeIt (24 views)
2014-12-23 03:34:11

rwatson462 (55 views)
2014-12-15 09:26:44

Mr.CodeIt (45 views)
2014-12-14 19:50:38

BurntPizza (86 views)
2014-12-09 22:41:13

BurntPizza (110 views)
2014-12-08 04:46:31

JscottyBieshaar (81 views)
2014-12-05 12:39:02

SHC (91 views)
2014-12-03 16:27:13

CopyableCougar4 (98 views)
2014-11-29 21:32:03

toopeicgaming1999 (157 views)
2014-11-26 15:22:04

toopeicgaming1999 (154 views)
2014-11-26 15:20:36
Resources for WIP games
by kpars
2014-12-18 10:26:14

Understanding relations between setOrigin, setScale and setPosition in libGdx
by mbabuskov
2014-10-09 22:35:00

Definite guide to supporting multiple device resolutions on Android (2014)
by mbabuskov
2014-10-02 22:36:02

List of Learning Resources
by Longor1996
2014-08-16 10:40:00

List of Learning Resources
by SilverTiger
2014-08-05 19:33:27

Resources for WIP games
by CogWheelz
2014-08-01 16:20:17

Resources for WIP games
by CogWheelz
2014-08-01 16:19:50

List of Learning Resources
by SilverTiger
2014-07-31 16:29:50
java-gaming.org is not responsible for the content posted by its members, including references to external websites, and other references that may or may not have a relation with our primarily gaming and game production oriented community. inquiries and complaints can be sent via email to the info‑account of the company managing the website of java‑gaming.org
Powered by MySQL Powered by PHP Powered by SMF 1.1.18 | SMF © 2013, Simple Machines | Managed by Enhanced Four Valid XHTML 1.0! Valid CSS!