std.experimental.allocator.mmap_allocator - D Programming Language

D Programming Language
Report a bug If you spot a problem with this page, click here to create a Bugzilla issue. Improve this page Quickly fork, edit online, and submit a pull request for this page. Requires a signed-in GitHub account. This works well for small changes. If you'd like to make larger changes you may want to consider using local clone.

# std.experimental.allocator.mmap_allocator

struct MmapAllocator;
  Allocator (currently defined only for Posix) using mmap and munmap directly. There is no additional structure: each call to allocate(s) issues a call to mmap(null, s, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0), and each call to deallocate(b) issues munmap(b.ptr, b.length). So MmapAllocator is usually intended for allocating large chunks to be managed by fine-granular allocators.
  static shared MmapAllocator instance;
    The one shared instance.
  enum size_t alignment;
    Alignment is page-size and hardcoded to 4096 (even though on certain systems it could be larger).
  shared void[] allocate(size_t bytes);
  shared bool deallocate(void[] b);
    Allocator API.

Copyright © 1999-2016 by Digital Mars ®, All Rights Reserved | Page generated by Ddoc on Tue Feb 23 23:28:32 2016