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[STL] list.clear() across DLL boundry causes exception

gimp · 2002-08-16T07:48:05

Initially this might have looked like a typicall ''this is my first attempt as a DLL'' type question, but dammit I''ve been working with DLL for ~ 2 years, these particular DLL!. Ok, this is a little long but I didn''t want to miss anything. My DLL''s have an Allocate\Deallocate function that return a pointer to the class in them. I use that pointer to access the member functions of the class in the DLL (I setup the pointer to be managed by a singeton in the EXE). The DLL. It collects input from window events and stores them in a a std::list as a bunch of simple struct like classes(public data). All very simple so far. When user code in the EXE, like the GUI wants some events, it gets some itr''s from the DLL reads the events etc. When all the user code that needs this input are over I call an .ClearEvents() method on my class that in turn calls m_Events.clear(); on the stored events. ==Exception== Now, the code I call from the EXE is just a member function on the class, called by following the pointer. The deallocation should be happening IN the DLL. I don''t get it... I''ve been on this one for about 3 days now. Problem is that I can''t even think of any other way of working around the problem. CInput::GetInstance().ClearEvents(); ~~ std::list<CInputEvent> m_Events; ~~ void CInput::ClearEvents(void) { m_Events.clear(); } I get the exception in dbgheap.c right at the end of the section that talks about checking for pointers from other heaps. ntdll.dll!77f7f570() ntdll.dll!77f67dc6() kernel32.dll!77e6c936() Game.exe!_CrtIsValidHeapPointer(const void * pUserData=0x00e58fb8) Line 1807 Game.exe!_free_dbg(void * pUserData=0x00e58fb8, int nBlockUse=1) Line 1132 + 0x9 Game.exe!operator delete(void * pUserData=0x00e58fb8) Line 53 + 0x10 Game.exe!std::allocator >::_Node>::deallocate(std::_List_nod >::_Node * _Ptr=0x00e58fb8, unsigned int __formal=1) Line 122 + 0x9 Game.exe!std::list >::erase(std::list >::iterator _Where={...}) Line 588 Game.exe!std::list >::erase(std::list >::iterator _First={...}, std::list >::iterator _Last={...}) Line 596 + 0x23 Game.exe!std::list >::clear() Line 603 Game.exe!CInput::ClearEvents() Line 46 Game.exe!CGame:rocessInput() Line 103 Game.exe!CGame::Execute() Line 47 Game.exe!CScheduler::Execute() Line 61 + 0x23 Game.exe!main(int argc=1, char * * argv=0x00a81560) Line 150 Game.exe!WinMain(HINSTANCE__ * a_Instance=0x00400000, HINSTANCE__ * a_PreviousInstance=0x00000000, char * a_Args=0x00141f13, int a_CmdShow=1) Line 29 + 0x12 Game.exe!WinMainCRTStartup() Line 251 + 0x32 kernel32.dll!77e7eb69() Help? Anyone? Chris Brodie http:\\fourth.flipcode.com

General and Gameplay Programming Programming

Started by gimp August 14, 2002 08:39 AM

9 comments, last by gimp 21 years, 8 months ago

gimp

142

Author

August 16, 2002 07:48 AM

Quoting .me:
"This idea was given to me by null and void if I remember correctly about a year ago"

Nope, it was null_pointer if memory serves.

Justice served...

Chris Brodie
http:\\fourth.flipcode.com

Chris Brodie

[STL] list.clear() across DLL boundry causes exception

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[STL] list.clear() across DLL boundry causes exception

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