Vendor ReadWriteLock from ConcurrentUtils

[jpsamaroo]

Vendors the ConcurrentUtils.ReadWriteLock to work around Windows incompatibility of Try.jl, until that can be forked to a new organization and issues resolved. In this case, ReadWriteLock only needs UnsafeAtomics.jl (which has active maintainers), so we depend on that instead.

Should fix #84. @DrChainsaw can you validate this?

[DrChainsaw]

Thanks alot for the quick turnaround!

Can confirm that I can install this branch on my machine.

However, I also ran the Dagger test suite locally with the branch and got two ConcurrencyViolationError errors which may or may not be related. Here is the first one:

per-call: Error During Test at .julia\dev\Dagger\test\thunk.jl:65
  Test threw exception
  Expression: fetch(c) == 20
  ThunkFailedException:
    Root Exception Type: CapturedException
    Root Exception:
  ConcurrencyViolationError("lock must be held")
  Stacktrace:
    [1] concurrency_violation
      @ .\condition.jl:8
    [2] assert_havelock
      @ .\condition.jl:25 [inlined]
    [3] assert_havelock
      @ .\condition.jl:48 [inlined]
    [4] assert_havelock
      @ .\condition.jl:72 [inlined]
    [5] _wait2
      @ .\condition.jl:83
    [6] #wait#645
      @ .\condition.jl:127
    [7] wait
      @ .\condition.jl:125 [inlined]
    [8] wait_for_conn
      @ .julia\juliaup\julia-1.10.2+0.x64.w64.mingw32\share\julia\stdlib\v1.10\Distributed\src\cluster.jl:195
    [9] check_worker_state
      @ .julia\juliaup\julia-1.10.2+0.x64.w64.mingw32\share\julia\stdlib\v1.10\Distributed\src\cluster.jl:170
   [10] send_msg_
      @ .julia\juliaup\julia-1.10.2+0.x64.w64.mingw32\share\julia\stdlib\v1.10\Distributed\src\messages.jl:172
   [11] send_msg
      @ .julia\juliaup\julia-1.10.2+0.x64.w64.mingw32\share\julia\stdlib\v1.10\Distributed\src\messages.jl:122 [inlined]
   [12] #remotecall_fetch#159
      @ .julia\juliaup\julia-1.10.2+0.x64.w64.mingw32\share\julia\stdlib\v1.10\Distributed\src\remotecall.jl:460
   [13] remotecall_fetch
      @ .julia\juliaup\julia-1.10.2+0.x64.w64.mingw32\share\julia\stdlib\v1.10\Distributed\src\remotecall.jl:454
   [14] remotecall_fetch
      @ .julia\juliaup\julia-1.10.2+0.x64.w64.mingw32\share\julia\stdlib\v1.10\Distributed\src\remotecall.jl:492
   [15] #192
      @ .julia\packages\MemPool\EYA1u\src\datastore.jl:527
   [16] forwardkeyerror
      @ .julia\packages\MemPool\EYA1u\src\datastore.jl:503
   [17] poolget
      @ .julia\packages\MemPool\EYA1u\src\datastore.jl:526
   [18] move
      @ .julia\dev\Dagger\src\chunks.jl:98
   [19] move
      @ .julia\dev\Dagger\src\chunks.jl:96 [inlined]
   [20] move
      @ .julia\dev\Dagger\src\chunks.jl:102
   [21] #invokelatest#2
      @ .\essentials.jl:892 [inlined]
   [22] invokelatest
      @ .\essentials.jl:889 [inlined]
   [23] #166
      @ .julia\dev\Dagger\src\sch\Sch.jl:1554
  Stacktrace:
   [1] wait
     @ .\task.jl:352 [inlined]
   [2] fetch
     @ .\task.jl:372 [inlined]
   [3] fetch_report
     @ .julia\dev\Dagger\src\sch\util.jl:263
   [4] do_task
     @ .julia\dev\Dagger\src\sch\Sch.jl:1563
   [5] #143
     @ .julia\dev\Dagger\src\sch\Sch.jl:1303
    This Thunk:  Thunk(id=13, *(Thunk[11](+, ...), Thunk[12](sum, ...)))
  Stacktrace:
    [1] fetch(t::Dagger.ThunkFuture; proc::OSProc, raw::Bool)
      @ Dagger .julia\dev\Dagger\src\eager_thunk.jl:16
    [2] fetch
      @ .julia\dev\Dagger\src\eager_thunk.jl:11 [inlined]
    [3] #fetch#73
      @ .julia\dev\Dagger\src\eager_thunk.jl:65 [inlined]
    [4] fetch(t::Dagger.EagerThunk)
      @ Dagger .julia\dev\Dagger\src\eager_thunk.jl:61
    [5] macro expansion
      @ .julia\juliaup\julia-1.10.2+0.x64.w64.mingw32\share\julia\stdlib\v1.10\Test\src\Test.jl:669 [inlined]
    [6] macro expansion
      @ .julia\dev\Dagger\test\thunk.jl:65 [inlined]
    [7] macro expansion
      @ .julia\juliaup\julia-1.10.2+0.x64.w64.mingw32\share\julia\stdlib\v1.10\Test\src\Test.jl:1577 [inlined]
    [8] macro expansion
      @ .julia\dev\Dagger\test\thunk.jl:57 [inlined]
    [9] macro expansion
      @ .julia\juliaup\julia-1.10.2+0.x64.w64.mingw32\share\julia\stdlib\v1.10\Test\src\Test.jl:1577 [inlined]
   [10] top-level scope
      @ .julia\dev\Dagger\test\thunk.jl:52

[jpsamaroo]

Great, thanks for testing! Those concurrency violation errors are from Distributed - you need JuliaLang/Distributed.jl#4 and Julia 1.11+ if you want to use Distributed with multithreading.