To head off wrong answers: It's not thread cells. By themselves, they're
not enough. Making them "preserved" also isn't the answer.
I'd like a thread-cell-like thing that gives each thread its own mutable
vector. Here's why thread cells don't work:
#lang racket
(define v (make-thread-cell (vector 0 1)))
(sync (thread (λ () (vector-set! (thread-cell-ref v) 0 6))))
(thread-cell-ref v)
Output:
#<thread>
'#(6 1)
Clearly, both the created thread and the runtime thread access the same
vector.
Not only do I need this, but I need repeated access to the per-thread
vectors to be faster than allocating a new one. Ideally, after the first
access, they'd allocate nothing.
Any ideas?
Neil ⊥
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