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Bug 135 - Must quit subsystem to detect new joysticks
Summary: Must quit subsystem to detect new joysticks
Status: RESOLVED FIXED
Alias: None
Product: SDL
Classification: Unclassified
Component: joystick (show other bugs)
Version: 2.0.0
Hardware: All All
: P4 API change
Assignee: Ryan C. Gordon
QA Contact: Sam Lantinga
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2006-02-03 21:16 UTC by Daniel Broschart
Modified: 2013-05-21 00:47 UTC (History)
4 users (show)

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Description Daniel Broschart 2006-02-03 21:16:45 UTC 
In order to find any new joysticks that have been plugged into the system since the SDL application has been running, I have to quit the Joystick subsystem and then re-initialize it before the new joysticks will be detected.
Comment 1 Patrice Mandin 2006-03-01 16:00:46 UTC 
Yes, maybe an event could be generated when a new device usable by SDL is plugged/unplugged on the system. As you said, it can be joysticks, but it could be  a monitor (for example for laptops), an audio card (there are USB ones), a keyboard, a mouse, and many more.

Example: When you play solo a 2D fighting game, and a friend comes and plug his joystick, the game would announce "a new challenger is coming...".
Comment 2 Daniel Broschart 2006-04-28 16:14:57 UTC 
When I execute my code on a different computer the application does not detect ANY joysticks (I have a CH Fighterstick USB, and a Belkin Nostromo n52 Speedpad) when I swap the ports that the joysticks are plugged into, and then hit the button that rescans for connected joysticks (which includes exiting and re-entering the Joystick subsystem).
Comment 3 Daniel Broschart 2006-04-28 17:18:44 UTC 
I recompiled with some debugging info and found that the line 184 in SDL_mmjoystick.c:

result = joyGetPosEx(SYS_JoystickID[i], &joyinfo);

returned 167 for the joysticks after they had been swapped, which is the JOYERR_UNPLUGGED return code.
Comment 4 Daniel Broschart 2006-04-28 17:29:55 UTC 
Oh, and at that line of code for all of the other joystick slots the system returned JOYERR_PARMS before and after the switch (which I assume is to be expected).
Comment 5 Max Horn 2006-05-13 08:26:08 UTC 
A patch of mine for the Windows Joystick code was recently commited to CVS/SVN, which should help the issue mentioned by Daniel in comments #2-#4. But of course it doesn't address the (design/API) issue that is the main subject of this report.

Daniel, can you confirm this?
Comment 6 Ryan C. Gordon 2006-10-28 20:35:48 UTC 
Grabbing this bug for consideration in SDL 1.3...

--ryan.
Comment 7 Ryan C. Gordon 2009-12-15 22:37:34 UTC 
Changing bug priorities...

--ryan.
Comment 8 Rodrigo Cardoso 2012-01-27 10:44:24 UTC 
Any news about this one?

If not, where can I start looking to make this work in Mac OS X? I need this functionality.

Thanks
Comment 9 Sam Lantinga 2013-05-21 00:47:04 UTC 
This is implemented in the current SDL snapshot:
http://www.libsdl.org/tmp/SDL-2.0.zip