lib/sync: Add option for sasha-s/go-deadlock

lib/sync/sync.go

@@ -15,6 +15,8 @@ import (
 	"sync"
 	"sync/atomic"
 	"time"
+
+	"github.com/sasha-s/go-deadlock"
 )
 
 type Mutex interface {
@@ -35,6 +37,9 @@ type WaitGroup interface {
 }
 
 func NewMutex() Mutex {
+	if useDeadlock {
+		return deadlock.Mutex{}
+	}
 	if debug {
 		mutex := &loggedMutex{}
 		mutex.holder.Store(holder{})
@@ -44,6 +49,9 @@ func NewMutex() Mutex {
 }
 
 func NewRWMutex() RWMutex {
+	if useDeadlock {
+		return deadlock.RWMutex{}
+	}
 	if debug {
 		mutex := &loggedRWMutex{
 			readHolders: make(map[int][]holder),