[PATCH] D47111: <experimental/memory_resource>: Implement monotonic_buffer_resource.

[Arthur O'Dwyer via Phabricator via cfe-commits]

Quuxplusone updated this revision to Diff 148843.
Quuxplusone added a comment.

Add `override`; disintegrate the unit test; adopt some tests from Eric's https://reviews.llvm.org/D27402.
Also fix one QOI issue discovered by Eric's tests: if the user passes an `initial_size` to the constructor, then they are //probably// intending that our first upstream-allocation be big enough to serve at least `initial_size` 1-byte allocations (or one `initial_size`-byte allocation with a suitably small alignment). This is explicitly //not// mandated by the Standard (it merely requires that our next upstream-allocation be of size at least `initial_size`), but it's probably a healthy choice.


Repository:
  rCXX libc++

https://reviews.llvm.org/D47111

Files:
  include/experimental/memory_resource
  src/experimental/memory_resource.cpp
  test/std/experimental/memory/memory.resource.monotonic.buffer/monotonic.buffer.ctor/copy_move.pass.cpp
  test/std/experimental/memory/memory.resource.monotonic.buffer/monotonic.buffer.ctor/with_default_resource.pass.cpp
  test/std/experimental/memory/memory.resource.monotonic.buffer/monotonic.buffer.ctor/without_buffer.pass.cpp
  test/std/experimental/memory/memory.resource.monotonic.buffer/monotonic.buffer.mem/allocate_deallocate.pass.cpp
  test/std/experimental/memory/memory.resource.monotonic.buffer/monotonic.buffer.mem/allocate_exception_safety.pass.cpp
  test/std/experimental/memory/memory.resource.monotonic.buffer/monotonic.buffer.mem/allocate_from_initial_buffer.pass.cpp
  test/std/experimental/memory/memory.resource.monotonic.buffer/monotonic.buffer.mem/allocate_from_underaligned_buffer.pass.cpp
  test/std/experimental/memory/memory.resource.monotonic.buffer/monotonic.buffer.mem/allocate_from_zero_sized_buffer.pass.cpp
  test/std/experimental/memory/memory.resource.monotonic.buffer/monotonic.buffer.mem/allocate_in_geometric_progression.pass.cpp
  test/std/experimental/memory/memory.resource.monotonic.buffer/monotonic.buffer.mem/allocate_overaligned_request.pass.cpp
  test/std/experimental/memory/memory.resource.monotonic.buffer/monotonic.buffer.mem/equality.pass.cpp
  test/std/experimental/memory/memory.resource.monotonic.buffer/nothing_to_do.pass.cpp

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