//go:build !windows

package instance

import "errors"

// ErrAlreadyRunning means another instance holds the single-instance slot.
var ErrAlreadyRunning = errors.New("another instance of ipswap is already running")

type noLock struct{}

func (noLock) release() {}

// lockProcess is a no-op off Windows: there is no named mutex, and the control
// listener alone is enough to detect a running instance during development.
// The consequence is only that two launches racing in the same millisecond
// could both become primary, which does not matter on a dev box.
func lockProcess() (releaser, error) { return noLock{}, nil }