C / C++ / MFC

Ajeesh c v wrote:

am initializing the pointer from thread...adn try to delete it from another thread

• un-initialized pointer, like int * p; delete p;
• pointer does not point to an object created with new: int x; int * p = &x; delete p;
• multiple execution of delete: int * p = new int; delete p; delete p;
• pointed zone was altered by other code: int * p = new int; memset(p-100, 0, 1000); delete p;
Note that null value of pointer does not generate exception. This is OK: int * p = NULL; delete p;


-- modified at 3:58 Wednesday 14th June, 2006

Ajeesh c v wrote:

int * p = NULL; delete p;

how the datas will be deleted from the location which is pointed by p initialy.
since u r saying to delete the pointer after asigning the pointer to null.

Ajeesh c v wrote:

how the datas will be deleted from the location which is pointed by p initialy.
since u r saying to delete the pointer after asigning the pointer to null.

int* pTest;
if (pTest)
   delete pTest;

if( p != NULL )
{
    delete p;
    p = NULL;
}

delete p;
p = NULL;

<br />
CMyDialog* pMyDialog;<br />
pMyDialog = new CMyDialog;<br />
pMyDialog->Create(IDD_TEST);//id from dialog<br />
pMyDialog->EndDialog(0);<br />
delete pMyDialog ;<br />
pMyDialog = 0;<br />

RahulOP wrote:

avctx=(AVCodecContext *)p4;
if(avctx==NULL){
CString str;
int a = GetLastError();
str.Format("%d",a);
AfxMessageBox(str);}
avctx->bit_rate=64000;

Cedric Moonen wrote:
And what are you trying to do here ? You are casting a function pointer into a pointer of type AVCodecContext*. That's logical that you will have some problems. You try to get a return from the function ? Then you need to put the exact function prototype in the typedef (with the return and the arguments of the function). Then, you can simply call it like another function and get the returned value.

RahulOP wrote:

AVCodecContext is defined in avcodec.h as struct.

typedef void (avcodec_alloc_context)();

typedef AVCodecContext* (avcodec_alloc_context)();

AVCodecContext *avctx = p4();