23 lines
1008 B
Plaintext
23 lines
1008 B
Plaintext
;;;; The context allocator holds an Allocator value, incarnation and all. Here
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;;;; the inner with-allocator destroys the arena the outer one installed, and
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;;;; on the way out the outer one is put back; the next arena-new takes the
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;;;; destroyed arena's record. Allocating from the context must then trap,
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;;;; not quietly allocate from the new arena. Argument 1 reads context/allocator
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;;;; as a value first and uses that instead, which traps the same way.
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(defn main [args [str]] i32
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(let [which (if (> (length args) 1) (bytes->i64 (bytes-view (at args 1))) 0)
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a (arena-new 4096)]
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(with-allocator a
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(let [held context/allocator]
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(with-allocator (heap-allocator)
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(arena-destroy a))
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(let [b (arena-new 4096)
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w (vec-new i32 b)]
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(push w 5)
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(println (at w 0))
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(if (= which 1)
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(let [v (vec-new i32 held)] (push v 1))
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(let [v (vec-new i32)] (push v 1)))
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(println "unreachable")))))
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0)
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