#14738: [pc_serial] Sometimes gets stuck in Write() (even in async mode)
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Reporter: ttcoder | Owner: pulkomandy
Type: bug | Status: assigned
Priority: normal | Milestone: Unscheduled
Component: Kits/Device Kit | Version: R1/Development
Resolution: | Keywords:
Blocked By: | Blocking:
Has a Patch: 0 | Platform: All
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Comment (by ttcoder):
Running {{{ps}}}, he gets this:
{{{
/boot/home/config/apps/TuneTrackerSystems/CommandCenter 589 7
0 0
Thread Id State Prio UTime
KTime
CommandCenter 589 wait 10 1294940
340328
event_server 607 wait 10 85438
30826 SwitcherHandler_looper(3464)
logging_server 608 wait 10 17937
8280
render 610 zzz 15 1514434
1373240
w>Command Center 618 wait 15 953315
243675
SwitcherHandler_looper 624 wait 10 222743
178693 pc_serial:done_write(3480)
}}}
Looking for "pc_serial:done_write" yields this:
http://xref.plausible.coop/source/xref/haiku/src/add-
ons/kernel/drivers/ports/pc_serial/SerialDevice.cpp
From my limited understanding, it seems the semaphore is acquired in
Write() and released in WriteCallbackFunction() ? So the fact my thread
remains stuck means the callback was not called, does that sound correct?
How do I deal with that in my app, can I "unblock" my thread from another
thread ?
--
Ticket URL: <https://dev.haiku-os.org/ticket/14738#comment:1>
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