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std::scoped_allocator_adaptor::allocate

Defined in header `<scoped_allocator>`
pointer allocate( size_type n );	(1)	(since C++11)
pointer allocate( size_type n, const_void_pointer hint );	(2)	(since C++11)

Uses the outer allocator to allocate uninitialized storage.

1) Calls std::allocator_traits<OuterAlloc>::allocate(outer_allocator(), n)

2) Additionally provides memory locality hint, by calling std::allocator_traits<OuterAlloc>::allocate(outer_allocator(), n, hint)

Parameters

n	-	the number of objects to allocate storage for
hint	-	pointer to a nearby memory location

Return value

The pointer to the allocated storage.

See also

allocate	allocates uninitialized storage (public member function of `std::allocator`)
allocate [static]	allocates uninitialized storage using the allocator (public static member function of `std::allocator_traits`)

Links:

http://en.cppreference.com/w/cpp/memory/scoped_allocator_adaptor/allocate

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2016-10-11 10:06:20

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