allocationat
Allocationat refers to a memory allocation operation that attempts to place a newly allocated block at a specified address within a process’s virtual address space. In contrast to conventional allocators that return any suitable free region, an allocationat request specifies a starting address and asks the allocator to honor that target if possible.
An allocationat call typically supplies a target address, a size, and optionally an alignment requirement. The
Fixed-address allocations are used in scenarios requiring interoperability with hardware buffers, memory-mapped I/O, or shared memory
Limitations and considerations
Allocators that support allocationat are not universal, and fixed-address allocations can complicate memory management, increasing fragmentation
Allocationat is related to general memory allocation and deallocation, placement (as in placement new in C++),