1. 1
2. 2
3. 3
4. 4
5. 5
6. 6
7. 7
8. 8
9. 9
10. 10
11. 11
12. 12
13. 13
14. 14
15. 15
16. 16
17. 17
18. 18
19. 19
20. 20
21. 21
22. 22
23. 23
24. 24
25. 25

package render

import "sync"

// rwLock represents an interface for sync.RWMutex.
type rwLock interface {
	Lock()
	Unlock()
	RLock()
	RUnlock()
}

var (
	// Ensure our interface is correct.
	_ rwLock = &sync.RWMutex{}
	_ rwLock = emptyLock{}
)

// emptyLock is a noop RWLock implementation.
type emptyLock struct{}

func (emptyLock) Lock()    {}
func (emptyLock) Unlock()  {}
func (emptyLock) RLock()   {}
func (emptyLock) RUnlock() {}