What are C++ allocators and how do they work?

What are C++ allocators and how do they work?

C++ allocators are objects responsible for managing memory allocation and deallocation for containers. They define how memory is allocated for elements in a container.

Can you explain the default allocator in C++?

The default allocator in C++ is the std::allocator class, which uses the global new and delete operators to allocate and deallocate memory.

How can I create a custom allocator?

To create a custom allocator, you need to define a class that implements specific member functions like allocate, deallocate, and construct. This allows you to control memory management.

What are the benefits of using custom allocators?

Custom allocators can improve performance by optimizing memory usage, reducing fragmentation, and providing specialized memory management strategies.