[all-commits] [llvm/llvm-project] d3aabe: [libc] Treat the locks array as a bitfield

[Joseph Huber via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: d3aabeb7b56b27cfacdc8af74d49d72186d89725
      https://github.com/llvm/llvm-project/commit/d3aabeb7b56b27cfacdc8af74d49d72186d89725
  Author: Joseph Huber <jhuber6 at vols.utk.edu>
  Date:   2023-07-21 (Fri, 21 Jul 2023)

  Changed paths:
    M libc/src/__support/RPC/rpc.h
    M libc/startup/gpu/amdgpu/start.cpp
    M libc/startup/gpu/nvptx/start.cpp
    M libc/utils/gpu/server/rpc_server.cpp
    M libc/utils/gpu/server/rpc_server.h

  Log Message:
  -----------
  [libc] Treat the locks array as a bitfield

Currently we keep an internal buffer of device memory that is used to
indicate ownership of a port. Since we only use this as a single bit we
can simply turn this into a bitfield. I did this manually rather than
having a separate type as we need very special handling of the masks
used to interact with the locks.

Reviewed By: JonChesterfield

Differential Revision: https://reviews.llvm.org/D155511