You have an unusual, but interesting scenario. I apologize as I really do not have the time to think about this properly.
Is this what you are trying to do: Main - normal J task - for example, in jconsole Main J task starts a sub task (which we will call A) with: p=. (libj,' JInit x') cd '' The name spaces of tasks Main and A are separate. You want to run J code in task A to call J code in task M. *** An interesting idea. Threads is an additional complication. If this were allowed to happen, you'd have 2 ways (jconsole keyboard and A use of JDo) to run sentences in MAIN. This has some serious problems. I think if you could get the MAIN jt, you'd just have more problems down the road. *** Perhaps other forum members with an interest in this type of problem can help. On Tue, Jul 24, 2018 at 9:45 AM, Sergey Kamenev <jsof...@inetstar.ru> wrote: > Hi, Eric! > > Why not just load your main script and then use the functions and variables >> directly. >> > > You offer me using a trick. > This trick make debug more complicated. > > Perhaps you could give a very simple example of exactly what you want to >> do. It is not clear what you meany by "return of a session of the main J >> script'. >> > > Short example: > > Typical use: > > Initialize the DLL, returning a J session number: > > p=. (libj,' JInit x') cd '' > ┌────────┐ > │53024912│ > └────────┘ > > I need this: > > p=. (libj,' JCurrSession x') cd '' > ┌────────┐ > │23452342│ > └────────┘ > > > Main script: > var1=: ... > var2=: ... > > function1=: ... > > After I load libj.so: > > (libj,' JDo i x *c') cd p,<cmd NB. send to J DLL > ┌─┬────────┬────────────────────┐ > │0 │23452342│ echo var1 function1 var2│ > └─┴────────┴────────────────────┘ > > In session 53024912 my variables var1 and var2 inaccesible, and function1 > also. > > If I'm know session of main script then I can using var1, var2, function1. > > *Details about my task:* > > I write the optimizer of trade strategy on J - test.ijs script which load > trade advisers also written in J. > This is massive computer job requires multiple processes or threads. > > I have wanted to use threads in J. > Linux have libpthread.so > > J has support of using shared libraries. > > Thread have multiple advantages: memory economy (shared data for all > threads) and lower CPU consumption against processes. > > I want to make the following: > > Get libj.so entering address: > > '/lib/libdl.so.2 dlopen x *c i' cd 'libj.so';2 > ┌────────┬───────┬─┐ > │27652176│libj.so│2│ > └────────┴───────┴─┘ > > Get JDo procedure address: > > '/lib/libdl.so.2 dlsym x x *c' cd 27652176; 'JDo' > ┌───────────────┬────────┬───┐ > │139689066604876│27652176│JDo│ > └───────────────┴────────┴───┘ > > Create thread: > Adr=: 0 > '/lib/libpthread.so.0 pthread_create x x x x x' cd Adr; NULL; > 139689066604876; NULL > > In this example do not shown hot to pass parameter for JDo. But this is > possible with function mema and memw. > > I need real access for JDo to varibles and function of main script. > > > Sergey. > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
