Does the renew operator delete the previously allocated mem?

[fedor_bel]

Hello,

Does the renew operator delete the previously allocated memory?

Like if some memory was allocated with new and then I call the renew operator and a completely new block of memory will be allocated, will the old block be freed?

Hopefully it will.

[jerome]

Hi fedor.

Yes the renew allocator either reuses, or frees then allocates a new block of memory.
It works similarly to the C function 'realloc'.

Typical usage:

Code: Select all

byte * mem = new byte[10];
mem = renew mem byte[20];

Use with complete peace of mind. No memory leaks.

Also note the zeroing versions:

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byte * mem = new0 byte[10];
mem = renew0 mem byte[20];

Which will only zero out the new portion of renew'ed memory.