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;; Pre-existing imports that the pass turns into the implementations.
(module
(memory 1 2)
(import "asyncify" "start_unwind" (func $asyncify_start_unwind (param i32)))
(import "asyncify" "stop_unwind" (func $asyncify_stop_unwind))
(import "asyncify" "start_rewind" (func $asyncify_start_rewind (param i32)))
(import "asyncify" "stop_rewind" (func $asyncify_stop_rewind))
(global $sleeping (mut i32) (i32.const 0))
;; do a sleep operation: start a sleep if running, or resume after a sleep
;; if we just rewound.
(func $do_sleep
(if
(i32.eqz (global.get $sleeping))
(block
(global.set $sleeping (i32.const 1))
;; we should set up the data at address 4 around here
(call $asyncify_start_unwind (i32.const 4))
)
(block
(global.set $sleeping (i32.const 0))
(call $asyncify_stop_rewind)
)
)
)
;; a function that does some work and has a sleep (async pause/resume) in the middle
(func $work
(call $stuff) ;; do some work
(call $do_sleep) ;; take a break
(call $stuff) ;; do some more work
)
(func $stuff)
;; the first event called from the main event loop: just call into $work
(func $first_event
(call $work)
;; work will sleep, so we exit through here while it is paused
)
;; the second event called from the main event loop: to resume $work,
;; stop the unwind, then prepare a rewind, and initiate it by doing
;; the call to rewind the call stack back up to where it was
(func $second_event
(call $asyncify_stop_unwind)
(call $asyncify_start_rewind (i32.const 4))
(call $work)
)
;; a function that can't do a sleep
(func $never_sleep
(call $stuff)
(call $stuff)
(call $stuff)
)
)
;; Calls to imports that will call into asyncify themselves.
(module
(memory 1 2)
(import "env" "import" (func $import))
(import "env" "import2" (func $import2 (result i32)))
(import "env" "import3" (func $import3 (param i32)))
(import "env" "import-mv" (func $import-mv (result i32 i64)))
(func $calls-import
(call $import)
)
(func $calls-import2 (result i32)
(local $temp i32)
(local.set $temp (call $import2))
(return (local.get $temp))
)
(func $calls-import2-drop
(drop (call $import2))
)
(func $calls-nothing
(drop (i32.eqz (i32.const 17)))
)
(func $many-locals (param $x i32) (result i32)
(local $y i32)
(local $z (f32 i64))
(loop $l
(local.set $x
(i32.add (local.get $y) (i32.const 1))
)
(local.set $y
(i32.div_s (local.get $x) (i32.const 3))
)
(br_if $l (local.get $y))
)
(call $import)
(return (local.get $y))
)
(func $calls-import2-if (param $x i32)
(if (local.get $x)
(call $import)
)
)
(func $calls-import2-if-else (param $x i32)
(if (local.get $x)
(call $import3 (i32.const 1))
(call $import3 (i32.const 2))
)
)
(func $calls-import2-if-else-oneside (param $x i32) (result i32)
(if (local.get $x)
(return (i32.const 1))
(call $import3 (i32.const 2))
)
(return (i32.const 3))
)
(func $calls-import2-if-else-oneside2 (param $x i32) (result i32)
(if (local.get $x)
(call $import3 (i32.const 1))
(return (i32.const 2))
)
(return (i32.const 3))
)
(func $calls-mv
(local $x (i32 i64))
(local.set $x (call $import-mv))
)
(func $calls-loop (param $x i32)
(loop $l
(call $import3 (i32.const 1))
(local.set $x
(i32.add (local.get $x) (i32.const 1))
)
(br_if $l
(local.get $x)
)
)
)
(func $calls-loop2
(loop $l
(br_if $l
(call $import2)
)
)
)
(func $calls-mix
(call $boring)
(call $import)
(call $boring)
(call $import)
)
(func $boring)
(func $calls-mix-deep
(call $boring-deep)
(call $import-deep)
(call $boring)
(call $import)
)
(func $boring-deep
(call $boring)
)
(func $import-deep
(call $import)
)
)
;; empty module, in particular with no memory
(module
)
|
