1 files changed, 0 insertions, 169 deletions
diff --git a/funcs.go b/funcs.go
deleted file mode 100644
index 07d35ec..0000000
--- a/funcs.go
+++ /dev/null
@@ -1,169 +0,0 @@
-package stm
-
-import (
-	"math/rand"
-	"runtime/pprof"
-	"sync"
-	"time"
-)
-
-var (
-	txPool = sync.Pool{New: func() any {
-		expvars.Add("new txs", 1)
-		tx := &Tx{
-			reads:    make(map[txVar]VarValue),
-			writes:   make(map[txVar]any),
-			watching: make(map[txVar]struct{}),
-		}
-		tx.cond.L = &tx.mu
-		return tx
-	}}
-	failedCommitsProfile *pprof.Profile
-)
-
-const (
-	profileFailedCommits = false
-	sleepBetweenRetries  = false
-)
-
-func init() {
-	if profileFailedCommits {
-		failedCommitsProfile = pprof.NewProfile("stmFailedCommits")
-	}
-}
-
-func newTx() *Tx {
-	tx := txPool.Get().(*Tx)
-	tx.tries = 0
-	tx.completed = false
-	return tx
-}
-
-func WouldBlock[R any](fn Operation[R]) (block bool) {
-	tx := newTx()
-	tx.reset()
-	_, block = catchRetry(fn, tx)
-	if len(tx.watching) != 0 {
-		panic("shouldn't have installed any watchers")
-	}
-	tx.recycle()
-	return
-}
-
-// Atomically executes the atomic function fn.
-func Atomically[R any](op Operation[R]) R {
-	expvars.Add("atomically", 1)
-	// run the transaction
-	tx := newTx()
-retry:
-	tx.tries++
-	tx.reset()
-	if sleepBetweenRetries {
-		shift := int64(tx.tries - 1)
-		const maxShift = 30
-		if shift > maxShift {
-			shift = maxShift
-		}
-		ns := int64(1) << shift
-		d := time.Duration(rand.Int63n(ns))
-		if d > 100*time.Microsecond {
-			tx.updateWatchers()
-			time.Sleep(time.Duration(ns))
-		}
-	}
-	tx.mu.Lock()
-	ret, retry := catchRetry(op, tx)
-	tx.mu.Unlock()
-	if retry {
-		expvars.Add("retries", 1)
-		// wait for one of the variables we read to change before retrying
-		tx.wait()
-		goto retry
-	}
-	// verify the read log
-	tx.lockAllVars()
-	if tx.inputsChanged() {
-		tx.unlock()
-		expvars.Add("failed commits", 1)
-		if profileFailedCommits {
-			failedCommitsProfile.Add(new(int), 0)
-		}
-		goto retry
-	}
-	// commit the write log and broadcast that variables have changed
-	tx.commit()
-	tx.mu.Lock()
-	tx.completed = true
-	tx.cond.Broadcast()
-	tx.mu.Unlock()
-	tx.unlock()
-	expvars.Add("commits", 1)
-	tx.recycle()
-	return ret
-}
-
-// AtomicGet is a helper function that atomically reads a value.
-func AtomicGet[T any](v *Var[T]) T {
-	return v.value.Load().Get().(T)
-}
-
-// AtomicSet is a helper function that atomically writes a value.
-func AtomicSet[T any](v *Var[T], val T) {
-	v.mu.Lock()
-	v.changeValue(val)
-	v.mu.Unlock()
-}
-
-// Compose is a helper function that composes multiple transactions into a
-// single transaction.
-func Compose[R any](fns ...Operation[R]) Operation[struct{}] {
-	return VoidOperation(func(tx *Tx) {
-		for _, f := range fns {
-			f(tx)
-		}
-	})
-}
-
-// Select runs the supplied functions in order. Execution stops when a
-// function succeeds without calling Retry. If no functions succeed, the
-// entire selection will be retried.
-func Select[R any](fns ...Operation[R]) Operation[R] {
-	return func(tx *Tx) R {
-		switch len(fns) {
-		case 0:
-			// empty Select blocks forever
-			tx.Retry()
-			panic("unreachable")
-		case 1:
-			return fns[0](tx)
-		default:
-			oldWrites := tx.writes
-			tx.writes = make(map[txVar]any, len(oldWrites))
-			for k, v := range oldWrites {
-				tx.writes[k] = v
-			}
-			ret, retry := catchRetry(fns[0], tx)
-			if retry {
-				tx.writes = oldWrites
-				return Select(fns[1:]...)(tx)
-			} else {
-				return ret
-			}
-		}
-	}
-}
-
-type Operation[R any] func(*Tx) R
-
-func VoidOperation(f func(*Tx)) Operation[struct{}] {
-	return func(tx *Tx) struct{} {
-		f(tx)
-		return struct{}{}
-	}
-}
-
-func AtomicModify[T any](v *Var[T], f func(T) T) {
-	Atomically(VoidOperation(func(tx *Tx) {
-		v.Set(tx, f(v.Get(tx)))
-	}))
-}