I'm using VS C++.NET 2005 Express in /clr mode. Say I have a PointF array:
array<PointF>^ point_array = gcnew array<PointF>(1 00) ;
Now I want to re-allocate point_array, and in doing so also free up the
previous array's points. Is this sufficient:
point_array = gcnew array<PointF>(9 99) ; // new array
or do I need to tell the system I'm doing this, ala something like:
delete point_array ;
point_array = nullptr ;
I'm guessing just re-allocating (or pointing) to something new will
automatically free up the elements in the array since the elements
themselves are instances of a ref class. But I want to be sure.
I'll point out that both of the following lines compile, but I don't believe
they both would work when executed (i.e., one or both would cause a program
crash):
delete point_array ;
delete [] point_array ;
and I'm not sure, but probable just doing:
point_array = nullptr ;
or
point_array = some_other_poin t_array ;
would also free up the points that were in the original array, and in the
case of setting it to nullptr would make the variable 'point_array'
available for re-allocation. Note, I'm not concerned whether garbage
collection decides to immediately free up the resource memory, just that
it's legal for me to re-assign or re-allocate the pointer to the array
without causing problems.
Thanks in advance for any responses!
[==P==] 1 1432
You can do a delete before doing the gcnew - but since the array does not
have a destructor, it won't really serve any purpose. Leave it to the GC to
collect the orphaned array as and when it pleases to do so :-)
--
Regards,
Nish [VC++ MVP]
"Peter Oliphant" <po*******@Roun dTripInc.com> wrote in message
news:eA******** ******@TK2MSFTN GP12.phx.gbl... I'm using VS C++.NET 2005 Express in /clr mode. Say I have a PointF array:
array<PointF>^ point_array = gcnew array<PointF>(1 00) ;
Now I want to re-allocate point_array, and in doing so also free up the previous array's points. Is this sufficient:
point_array = gcnew array<PointF>(9 99) ; // new array
or do I need to tell the system I'm doing this, ala something like:
delete point_array ; point_array = nullptr ;
I'm guessing just re-allocating (or pointing) to something new will automatically free up the elements in the array since the elements themselves are instances of a ref class. But I want to be sure.
I'll point out that both of the following lines compile, but I don't believe they both would work when executed (i.e., one or both would cause a program crash):
delete point_array ; delete [] point_array ;
and I'm not sure, but probable just doing:
point_array = nullptr ;
or
point_array = some_other_poin t_array ;
would also free up the points that were in the original array, and in the case of setting it to nullptr would make the variable 'point_array' available for re-allocation. Note, I'm not concerned whether garbage collection decides to immediately free up the resource memory, just that it's legal for me to re-assign or re-allocate the pointer to the array without causing problems.
Thanks in advance for any responses!
[==P==] This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
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