NAME

std::pmr::monotonic_buffer_resource::do_allocate - std::pmr::monotonic_buffer_resource::do_allocate

Synopsis

virtual void* do_allocate( std::size_t bytes, std::size_t alignment (since C++17)
);

Allocates storage.

If the current buffer has sufficient unused space to fit a block with the specified
size and alignment, allocates the return block from the current buffer.

Otherwise, this function allocates a new buffer by calling
upstream_resource()->allocate(n, m), where n is not less than the greater of bytes
and the next buffer size and m is not less than alignment. It sets the new buffer as
the current buffer, increases the next buffer size by an implementation-defined
growth factor (which is not necessarily integral), and then allocates the return
block from the newly allocated buffer.

Return value

A pointer to allocated storage of at least bytes bytes in size, aligned to the
specified alignment if such alignment is supported, and to alignof(std::max_align_t)
otherwise.

Exceptions

Throws nothing unless calling allocate() on the upstream memory resource throws.

See also

allocate allocates memory
(public member function of std::pmr::memory_resource)
do_allocate allocates memory
[virtual] (virtual private member function of std::pmr::memory_resource)