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package stm
import (
"flag"
"sync"
)
func testPingPong(n int, afterHit func(string)) {
ball := NewBuiltinEqVar(false)
doneVar := NewVar(false)
hits := NewVar(0)
ready := NewVar(true) // The ball is ready for hitting.
var wg sync.WaitGroup
bat := func(from, to bool, noise string) {
defer wg.Done()
for !Atomically(func(tx *Tx) any {
if doneVar.Get(tx) {
return true
}
tx.Assert(ready.Get(tx))
if ball.Get(tx) == from {
ball.Set(tx, to)
hits.Set(tx, hits.Get(tx)+1)
ready.Set(tx, false)
return false
}
return tx.Retry()
}).(bool) {
afterHit(noise)
AtomicSet(ready, true)
}
}
wg.Add(2)
go bat(false, true, "ping!")
go bat(true, false, "pong!")
Atomically(VoidOperation(func(tx *Tx) {
tx.Assert(hits.Get(tx) >= n)
doneVar.Set(tx, true)
}))
wg.Wait()
}
var nFlag = flag.Int(
"n",
1_000,
"The number of iterations to execute",
)
func MainTest() {
flag.Parse()
n := *nFlag
for i := 0; i < n; i++ {
testPingPong(n, func(string) {})
}
}
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