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std::pmr::monotonic_buffer_resource::do_allocate

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Dynamic memory management
Uninitialized storage
(C++17)
(deprecated since c++17)
(deprecated since c++17)
(deprecated since c++17)
Garbage collection support
Miscellaneous
(C++20)
(C++11)
(C++11)
C Library
Low level memory management
 
 
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.

[edit] 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.

[edit] Exceptions

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

[edit] See also

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