Collection of typical and useful prebuilt allocators using the given components. User code would typically import this module and use its facilities, or import individual heap building blocks and assemble them.
Allocator that uses stack allocation for up to
stackSize bytes and then falls back to
Allocator. Defined as:
alias StackFront(size_t stackSize, Allocator) = FallbackAllocator!( InSituRegion!(stackSize, Allocator.alignment, hasMember!(Allocator, "deallocate") ? Yes.defineDeallocate : No.defineDeallocate), Allocator);
stackSizeis as always a compromise. Too small a size exhausts the stack storage after a few allocations, after which there are no gains over the backup allocator. Too large a size increases the stack consumed by the thread and may end up worse off because it explores cold portions of the stack.
StackFront!4096 a; auto b = a.allocate(4000); writeln(b.length); // 4000 auto c = a.allocate(4000); writeln(c.length); // 4000 a.deallocate(b); a.deallocate(c);
Creates a scalable
Regions, each having at least
bytesPerRegion bytes. Allocation is very fast. This allocator does not offer
deallocate but does free all regions in its destructor. It is recommended for short-lived batch applications that count on never running out of memory.
auto alloc = mmapRegionList(1024 * 1024); const b = alloc.allocate(100); writeln(b.length); // 100
© 1999–2019 The D Language Foundation
Licensed under the Boost License 1.0.