#1081: HGL indefinite pause with "thread blocked indefinitely" message
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Reporter: calvins | Owner:
Type: bug | Status: new
Priority: normal | Milestone: Not GHC
Component: libraries (other) | Version: 6.6
Severity: normal | Resolution:
Keywords: hgl thread deadlock | Difficulty: Unknown
Testcase: | Architecture: Multiple
Os: Multiple |
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Changes (by simonmar):
* component: Compiler => libraries (other)
* milestone: => Not GHC
Comment:
I believe I've fixed some of the issues here, but there may be more.
* The X11 library didn't provide a way to call XInitThreads, required for
multithreaded clients. (now added, and called from `HGL.runGraphics`
if necessary).
* The XNextEvent function wasn't imported ''safe'', so it blocked the
other
threads.
However, with these fixes, the program still hangs on startup until the
first event is received. I'm not sure why - the two active threads both
appear to be waiting in `XNextEvent`, so the program really is waiting for
an event. Maybe an HGL expert is needed here (is there one?).
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1081>
GHC <http://www.haskell.org/ghc/>
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