[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Bug-kawa] [bugs #11862] can't open file input ports except on Kawa main
From: |
Steve Yegge |
Subject: |
[Bug-kawa] [bugs #11862] can't open file input ports except on Kawa main thread |
Date: |
Sat, 5 Feb 2005 16:46:14 +0000 |
User-agent: |
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.5) Gecko/20041107 Firefox/1.0 |
URL:
<http://savannah.gnu.org/bugs/?func=detailitem&item_id=11862>
Summary: can't open file input ports except on Kawa main
thread
Project: Kawa
Submitted by: stevey
Submitted on: Sat 02/05/2005 at 16:46
Category: Scheme library
Severity: 5 - Average
Item Group: Run-time exception
Status: None
Privacy: Public
Assigned to: None
Open/Closed: Open
_______________________________________________________
Details:
I've found that I can't read data from files using Scheme input ports on any
thread other than Kawa's main interpreter thread. This causes problems for
me in Swing applications, since Swing events happen on a separate dedicated
thread.
This use case demonstrates the problem:
(invoke
(make <java.lang.Thread>
(object (<java.lang.Runnable>)
((run) :: <void>
(let ((p (open-input-file "very-small-test.scm")))
(let f ((x (read-line p)))
(if (eof-object? x)
(begin
(close-input-port p)
'())
(cons x (f (read-line p)))))))))
'start)
java.lang.NullPointerException
at gnu.mapping.InPort.openFile(InPort.java:97)
at gnu.mapping.InPort.openFile(InPort.java:91)
at kawa.lib.ports.openInputFile(ports.scm:2)
at atInteractiveLevel$275$object.run(<stdin>:1844)
at java.lang.Thread.run(Thread.java:534)
If you run the let-expression without wrapping in a thread, it works fine.
It's hard to tell from the stack trace, but some poking around showed that
CallContext.getInstance() or CallContext.getInstance.getEnvironment() was
null, can't remember which anymore.
This problem only appears to happen in 1.7.91, not in 1.7, and it happens
using Sun JDK 1.4.2 and also 1.5.0 (on Linux and Cygwin/XP).
_______________________________________________________
This item URL is:
<http://savannah.gnu.org/bugs/?func=detailitem&item_id=11862>
_______________________________________________
Message sent via/by Savannah
http://savannah.gnu.org/
[Prev in Thread] |
Current Thread |
[Next in Thread] |
- [Bug-kawa] [bugs #11862] can't open file input ports except on Kawa main thread,
Steve Yegge <=