[libc-commits] [PATCH] D149226: [libc] Partially implement `atexit` on the GPU

[Joseph Huber via Phabricator via libc-commits]

jhuber6 created this revision.
jhuber6 added reviewers: jdoerfert, tianshilei1992, JonChesterfield, sivachandra, michaelrj, lntue.
Herald added subscribers: libc-commits, ecnelises, tschuett.
Herald added projects: libc-project, All.
jhuber6 requested review of this revision.

The `atexit` function controls registering functions to call at the end
of the program. This is difficult to do in general on the GPU because of
the lack of a real mutex implementation. We primarily provide this for
testing where we can explicitly restrict how the `atexit` registration
functions are called. So we simply create a passthrough Mutex to get
past the usage of it as per @sivachandra's suggestion.

Depends on D149225 <https://reviews.llvm.org/D149225>


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D149226

Files:
  libc/config/gpu/api.td
  libc/config/gpu/entrypoints.txt
  libc/src/__support/threads/gpu/CMakeLists.txt
  libc/src/__support/threads/gpu/mutex.h
  libc/src/__support/threads/mutex.h

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