Commits on Feb 12, 2018

1. introduce std.heap.ArenaAllocator and std.heap.DirectAllocator …

    * DirectAllocator does the underlying syscall for every allocation.
    * ArenaAllocator takes another allocator as an argument and
      allocates bytes up front, falling back to DirectAllocator with
      increasingly large allocation sizes, to avoid calling it too often.
      Then the entire arena can be freed at once.
   
   The self hosted parser is updated to take advantage of ArenaAllocator
   for the AST that it returns. This significantly reduces the complexity
   of cleanup code.
   
   docgen and build runner are updated to use the combination of
   ArenaAllocator and DirectAllocator instead of IncrementingAllocator,
   which is now deprecated in favor of FixedBufferAllocator combined
   with DirectAllocator.
   
   The C allocator calls aligned_alloc instead of malloc, in order to
   respect the alignment parameter.
   
   Added asserts in Allocator to ensure that implementors of the
   interface return slices of the correct size.
   
   Fixed a bug in Allocator when you call realloc to grow the allocation.

   

   andrewrk committed Feb 12, 2018
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   445b033 View commit details

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2. remove std.heap.IncrementingAllocator …

   Use std.heap.FixedBufferAllocator combined with
   std.heap.DirectAllocator instead.
   
   std.mem.FixedBufferAllocator is moved to std.heap.FixedBufferAllocator

   

   andrewrk committed Feb 12, 2018
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   4a4ea92 View commit details

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