terraform/internal/states/statemgr/transient_inmem.go

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package statemgr
import (
"sync"
"github.com/hashicorp/terraform/internal/states"
)
// NewTransientInMemory returns a Transient implementation that retains
// transient snapshots only in memory, as part of the object.
//
// The given initial state, if any, must not be modified concurrently while
// this function is running, but may be freely modified once this function
// returns without affecting the stored transient snapshot.
func NewTransientInMemory(initial *states.State) Transient {
return &transientInMemory{
current: initial.DeepCopy(),
}
}
type transientInMemory struct {
lock sync.RWMutex
current *states.State
}
var _ Transient = (*transientInMemory)(nil)
func (m *transientInMemory) State() *states.State {
m.lock.RLock()
defer m.lock.RUnlock()
return m.current.DeepCopy()
}
func (m *transientInMemory) WriteState(new *states.State) error {
m.lock.Lock()
defer m.lock.Unlock()
m.current = new.DeepCopy()
return nil
}