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Bug 2860

Summary: SetProp must be paired with RemoveProp especially for properties added to external windows
Product: SDL Reporter: Coriiander <coriiander>
Component: videoAssignee: Sam Lantinga <slouken>
Status: RESOLVED FIXED QA Contact: Sam Lantinga <slouken>
Severity: normal    
Priority: P2 Keywords: target-2.0.4
Version: 2.0.3   
Hardware: All   
OS: Windows (All)   

Description Coriiander 2015-01-31 17:43:49 UTC 
This bug report is aimed towards the window management system for the Windows platform. 

Upon creating a window, a window property is added to it through the Win32-function "SetProp". This is done in the SDL-function "SetupWindowData" in file "src\video\windows\SDL_windowswindow.c".

Whenever you call "SetProp" to add a property to a Win32-window, you should also call the Win32-function "RemoveProp" to remove it before destroying that Win32-window.

While you might think that it's ok and that Windows will clean up nicely itself, it is not ok. It is against all Win32-API guidelines and is mostlikely a leak. Especially on external windows (CreateWindowFrom) you want to have things done right, not messy and leaky, affecting some other module. Even if SDL gets shutdown entirely that external window will now forever still have the "SDL_WindowData" prop attached to it.
Comment 1 Ryan C. Gordon 2015-02-19 06:32:14 UTC 
Marking a large number of bugs with the "triage-2.0.4" keyword at once. Sorry
if you got a lot of email from this. This is to help me sort through some bugs
in regards to a 2.0.4 release. We may or may not fix this bug for 2.0.4,
though!
Comment 2 Ryan C. Gordon 2015-04-07 04:57:53 UTC 
(sorry if you get a lot of copies of this email, I'm marking several bugs at once)

Marking bugs for the (mostly) final 2.0.4 TODO list. This means we're hoping to resolve this bug before 2.0.4 ships if possible. In a perfect world, the open bug count with the target-2.0.4 keyword is zero when we ship.

(Note that closing a bug report as WONTFIX, INVALID or WORKSFORME might still happen.)

--ryan.
Comment 3 Sam Lantinga 2015-05-28 15:41:34 UTC 
Fixed, thanks!
https://hg.libsdl.org/SDL/rev/42ab66d97cc1