Whats Your opinion is it possible to localize memory which responsible for continuations in heap? May be I could try to make a patch or dirty hack(for example swicth stack pointer for every racket API call :))
05.12.2014, 15:27, "Matthew Flatt" <mfl...@cs.utah.edu>: > At Thu, 04 Dec 2014 00:23:37 +0300, Nesterov Kirill wrote: >>> (call-with-continuation-prompt (lambda () (generate-digit))) >> With this I'm getting segfault. > > Sorry for the delay! Looking back at your original explanation: >>> At Wed, 03 Dec 2014 23:45:28 +0300, Nesterov Kirill wrote: >>>> I'm trying to embed racket 3m version as interpreter into GUI >>>> application. For custom interpreters this application have two >>>> required APIs - first one is init and the second one is eval >>>> string. So in init I'm calling scheme_register_tls_space and >>>> scheme_main_setup after. And in eval I'm using custom version of >>>> Racket's read-eval-print-loop without recursion for evaluation of >>>> thrings. > > I think you're saying that Racket_cli_execute_line() is not called > within the function passed to scheme_main_setup(), but is instead > called after scheme_main_setup() returns. > > If so, that would explain the crash when trying to use continuations. > The Racket run-time system expects to be within the call to > scheme_main_setup() always, so that it can manipulate the C stack to > implement continuations, threads, etc. > > Having to put all calls to Racket inside scheme_main_setup() can be > awkward for an embedding application. When the embedding application > can't be organized so that all calls are within scheme_main_setup(), a > possible approach is to put Racket into its own OS-level thread. The > scheme_main_setup() function would be called in that thread, and the > function passed to scheme_main_setup() would wait for evaluation > requests from other threads. Then, Racket_cli_execute_line() would send > a request to that thread and wait for the response. > > Of course, putting Racket into its own OS thread can complicate > interactions between Racket and the embedding application, especially > if Racket calls back to the embedding environment. Unfortunately, we > don't have a better answer at the moment. ____________________ Racket Users list: http://lists.racket-lang.org/users
