Groups > comp.lang.java.programmer > #25280

Re: JNI and GetFieldID

From	Steven Simpson <ss@domain.invalid>
Newsgroups	comp.lang.java.programmer
Subject	Re: JNI and GetFieldID
Date	2013-09-13 13:31 +0100
Organization	A noiseless patient Spider
Message-ID	<d5dbga-em5.ln1@s.simpson148.btinternet.com> (permalink)
References	(1 earlier) <gb2pfa-s33.ln1@s.simpson148.btinternet.com> <l0d1ak$5s5$1@node1.news.atman.pl> <l0g277$75f$1@node1.news.atman.pl> <7cstfa-3nc.ln1@s.simpson148.btinternet.com> <l0hjht$nvr$1@node1.news.atman.pl>

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On 08/09/13 11:29, Borneq wrote:
> Inside StateProc I can call my_callback function, and ACEListProc will 
> be called inside native function. Native function can store env and 
> others parameters. But how within StateProc refer to this env and 
> other parameters? 

It's a bugger, isn't it?!

> This parameters must be stored globally in data segment?

Perhaps.  This option would need some synchronization on the Java side 
to protect it, but I'm not sure that would suffice in some cases (e.g., 
when the class you lock on is loaded multiple times).

A thread-local in C?  Find out what the JVM uses for threads, and use 
its thread-local feature.

Perhaps you can use the C callback just to build up a structure 
locally.  When control returns from the library back to your JNI 
function, you iterate over the structure to invoke Java callbacks.

I'm out of decent ideas.

-- 
ss at comp dot lancs dot ac dot uk

Thread

JNI and GetFieldID "Borneq" <borneq@antyspam.hidden.pl> - 2013-09-05 17:05 +0200
  Re: JNI and GetFieldID Mark <i@dontgetlotsofspamanymore.invalid> - 2013-09-06 10:25 +0100
  Re: JNI and GetFieldID Steven Simpson <ss@domain.invalid> - 2013-09-06 16:36 +0300
    Re: JNI and GetFieldID "Borneq" <borneq@antyspam.hidden.pl> - 2013-09-06 18:53 +0200
      Re: JNI and GetFieldID "Borneq" <borneq@antyspam.hidden.pl> - 2013-09-06 20:44 +0200
        Re: JNI and GetFieldID Steven Simpson <ss@domain.invalid> - 2013-09-06 22:34 +0300
          Re: JNI and GetFieldID "Borneq" <borneq@antyspam.hidden.pl> - 2013-09-06 23:06 +0200
      Re: JNI and GetFieldID "Borneq" <borneq@antyspam.hidden.pl> - 2013-09-07 22:27 +0200
        Re: JNI and GetFieldID Steven Simpson <ss@domain.invalid> - 2013-09-08 10:24 +0100
          Re: JNI and GetFieldID "Borneq" <borneq@antyspam.hidden.pl> - 2013-09-08 12:29 +0200
            Re: JNI and GetFieldID "Borneq" <borneq@antyspam.hidden.pl> - 2013-09-08 22:45 +0200
            Re: JNI and GetFieldID Steven Simpson <ss@domain.invalid> - 2013-09-13 13:31 +0100
              Re: JNI and GetFieldID "Borneq" <borneq@antyspam.hidden.pl> - 2013-09-14 18:50 +0200
              Re: JNI and GetFieldID "Chris Uppal" <chris.uppal@metagnostic.REMOVE-THIS.org> - 2013-09-19 15:02 +0100

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