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wasi-threads: fix use of wait in test #5858

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Feb 23, 2023
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wasi-threads: fix use of wait in test #5858

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13 changes: 8 additions & 5 deletions tests/all/cli_tests/threads.wat
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Original file line number Diff line number Diff line change
Expand Up @@ -21,12 +21,15 @@
(drop (call $__wasi_thread_spawn (i32.const 0)))

;; Wait for all the threads to notify us that they are done.
(local.set $i (i32.const 0))
(loop $again
;; Retrieve the i32 at address 128, compare it to -1 (it should always
;; fail) and load it atomically to check if all three threads are
;; complete. This wait is for 1ms or until notified, whichever is first.
(drop (memory.atomic.wait32 (i32.const 128) (i32.const -1) (i64.const 1000000)))
(br_if $again (i32.lt_s (i32.atomic.load (i32.const 128)) (i32.const 3)))
;; Wait for the i32 at address 128 to be incremented by each thread. We
;; maintain a local $i with the atomically loaded value as the expected
;; wait value and to check if all three threads are complete. This wait is
;; for 1ms or until notified, whichever is first.
(drop (memory.atomic.wait32 (i32.const 128) (local.get $i) (i64.const 1000000)))
(local.set $i (i32.atomic.load (i32.const 128)))
(br_if $again (i32.lt_s (local.get $i) (i32.const 3)))
)

;; Print "Done".
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