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passing params to CreateThread

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passing params to CreateThread

 
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  #1
Sep 28th, 2008
i have a bunch of data i want to pass to CreateThread. i created a struct as per the msdn documentation. here it is:

C++ Syntax (Toggle Plain Text) 
  1. typedef struct ThreadRecvData
  2. {
  3. 	std::list<char> data;
  4. 	Ogre::String addr;
  5. 	unsigned long port;
  6. } THREADRECVDATA, *PTHREADRECVDATA;

then i initialise the struct, again as per the msdn documentation:

C++ Syntax (Toggle Plain Text) 
  1. PTHREADRECVDATA pThreadRecvData;
  2. pThreadRecvData = (PTHREADRECVDATA) HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(THREADRECVDATA));
  3. pThreadRecvData->addr = "123";
  4. pThreadRecvData->port = 123;
  5. pThreadRecvData->data.push_back('x');

i get a crash at pThreadRecvData->data.push_back('x').

can anyone help ?

thank you.
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Re: passing params to CreateThread

 
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  #2
Sep 28th, 2008
You probably can't use HeapAlloc() to allocate memory for pThreadRecvData because std::list allocated memory from the standard heap using new operator. Replace HeapAlloc() with new and retest.
Don't PM me with questions -- you might get a nasty PM in response. If you have a question then post it in one of the forums.
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Re: passing params to CreateThread

 
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  #3
Sep 28th, 2008
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Originally Posted by Ancient Dragon View Post
You probably can't use HeapAlloc() to allocate memory for pThreadRecvData because std::list allocated memory from the standard heap using new operator. Replace HeapAlloc() with new and retest.
i used new and yes it does indeed work. i wanted really to understand what was happening - so thanks for the explanation.
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