What is the difference between ::operator new(size_t) new and malloc?

Asked Apr 29 '14 at 21:48

Active Apr 29 '14 at 21:50

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It appears to me both allocate a block of memory and return the pointer to the first byte. Any difference? I notice that GCC's allocator classes have two versions, one using ::operator new, another one using malloc.

http://gcc.gnu.org/viewcvs/gcc/trunk/libstdc%2B%2B-v3/include/ext/new_allocator.h?view=markup

http://gcc.gnu.org/viewcvs/gcc/trunk/libstdc%2B%2B-v3/include/ext/malloc_allocator.h?view=markup

(I understand that new expression and operator new are different)

asked Apr 29 '14 at 21:48

szli

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What wasn't there identical question like 2 days ago max? @larsmans Ok, 5 days =) – luk32 Apr 29 '14 at 21:50
Thanks. I vote to close this question... – szli Apr 29 '14 at 21:52
It seriously didn't pop up in the automatic duplicate indicator when you post questions? The title is nearly exactly the same. – luk32 Apr 29 '14 at 21:53

What is the difference between ::operator new(size_t) new and malloc?

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