fix issue #2570 (#2819)

os/gmlock/gmlock_locker.go

@@ -7,8 +7,9 @@
 package gmlock
 
 import (
+	"sync"
+
 	"github.com/gogf/gf/v2/container/gmap"
-	"github.com/gogf/gf/v2/os/gmutex"
 )
 
 // Locker is a memory based locker.
@@ -42,7 +43,7 @@ func (l *Locker) TryLock(key string) bool {
 // Unlock unlocks the writing lock of the `key`.
 func (l *Locker) Unlock(key string) {
 	if v := l.m.Get(key); v != nil {
-		v.(*gmutex.Mutex).Unlock()
+		v.(*sync.RWMutex).Unlock()
 	}
 }
 
@@ -62,7 +63,7 @@ func (l *Locker) TryRLock(key string) bool {
 // RUnlock unlocks the reading lock of the `key`.
 func (l *Locker) RUnlock(key string) {
 	if v := l.m.Get(key); v != nil {
-		v.(*gmutex.Mutex).RUnlock()
+		v.(*sync.RWMutex).RUnlock()
 	}
 }
 
@@ -126,8 +127,8 @@ func (l *Locker) Clear() {
 
 // getOrNewMutex returns the mutex of given `key` if it exists,
 // or else creates and returns a new one.
-func (l *Locker) getOrNewMutex(key string) *gmutex.Mutex {
+func (l *Locker) getOrNewMutex(key string) *sync.RWMutex {
 	return l.m.GetOrSetFuncLock(key, func() interface{} {
-		return gmutex.New()
-	}).(*gmutex.Mutex)
+		return &sync.RWMutex{}
+	}).(*sync.RWMutex)
 }