func (o *Options) acidFiler(db *DB, f lldb.Filer) (r lldb.Filer, err error) {
switch o._ACID {
default:
panic("internal error")
case _ACIDTransactions:
if r, err = lldb.NewRollbackFiler(
f,
func(sz int64) error {
return f.Truncate(sz)
},
f,
); err != nil {
return nil, err
}
return r, nil
case _ACIDFull:
if r, err = lldb.NewACIDFiler(f, o.wal); err != nil {
return nil, err
}
db.acidState = stIdle
db.gracePeriod = o._GracePeriod
if o._GracePeriod == 0 {
panic("internal error")
}
return r, nil
}
}
func (o *Options) acidFiler(db *DB, f lldb.Filer) (r lldb.Filer, err error) {
switch o.ACID {
default:
panic("internal error")
case ACIDNone:
r = f
case ACIDTransactions:
var rf *lldb.RollbackFiler
if rf, err = lldb.NewRollbackFiler(
f,
func(sz int64) error {
return f.Truncate(sz)
},
f,
); err != nil {
return
}
db.xact = true
r = rf
case ACIDFull:
if r, err = lldb.NewACIDFiler(f, o.wal); err != nil {
return
}
db.acidState = stIdle
db.gracePeriod = o.GracePeriod
db.xact = true
if o.GracePeriod == 0 {
db.acidState = stDisabled
break
}
// Ensure GOMAXPROCS > 1, required for ACID FSM
if n := runtime.GOMAXPROCS(0); n > 1 {
return
}
runtime.GOMAXPROCS(2)
}
return
}
