diff --git a/TODO.MD b/TODO.MD
index 3345805b4..3aae6623c 100644
--- a/TODO.MD
+++ b/TODO.MD
@@ -47,6 +47,13 @@
 1. 改进WebServer获取POST参数处理逻辑，当提交非form数据时，例如json数据，针对某些方法可以直接解析；
 1. WebServer增加可选择的路由覆盖配置，默认情况下不覆盖；
 1. grpool性能压测结果变慢的问题；
+1. glist增加Element类型的并发安全处理；
+
+
+
+
+
+
 
 
 # DONE
diff --git a/g/container/glist/glist.go b/g/container/glist/glist.go
index f6eb2643d..6baeea906 100644
--- a/g/container/glist/glist.go
+++ b/g/container/glist/glist.go
@@ -5,274 +5,276 @@
 // You can obtain one at https://gitee.com/johng/gf.
 //
 
-// Package glist provides a concurrent-safe(alternative) doubly linked list.
-// 并发安全的双向链表.
+// Package glist provides a concurrent-safe(alternative) doubly linked list/并发安全的双向链表.
 package glist
 
 import (
-	"container/list"
-	"gitee.com/johng/gf/g/container/internal/rwmutex"
+    "gitee.com/johng/gf/g/container/gtype"
 )
 
 // 变长双向链表
 type List struct {
-	mu   *rwmutex.RWMutex
-	list *list.List
+    safe   bool
+    root   *Element
+    length *gtype.Int
 }
 
 // 获得一个变长链表指针
 func New(safe...bool) *List {
-	return &List {
-	    mu   : rwmutex.New(safe...),
-		list : list.New(),
+	l := &List{
+	    length : gtype.NewInt(),
     }
+	l.root      = newElement(nil, safe...)
+	l.root.list = l
+    l.root.setNext(l.root)
+    l.root.setPrev(l.root)
+    if len(safe) > 0 {
+        l.safe = safe[0]
+    } else {
+        l.safe = true
+    }
+    return l
 }
 
 // 往链表头入栈数据项
-func (l *List) PushFront(v interface{}) *list.Element {
-	l.mu.Lock()
-	e := l.list.PushFront(v)
-	l.mu.Unlock()
-	return e
+func (l *List) PushFront(v interface{}) *Element {
+    return l.insertValue(v, l.root)
 }
 
 // 往链表尾入栈数据项
-func (l *List) PushBack(v interface{}) *list.Element {
-	l.mu.Lock()
-	r := l.list.PushBack(v)
-	l.mu.Unlock()
-	return r
+func (l *List) PushBack(v interface{}) *Element {
+    return l.insertValue(v, l.root.getPrev())
 }
 
 // 在list 中元素mark之后插入一个值为v的元素，并返回该元素，如果mark不是list中元素，则list不改变。
-func (l *List) InsertAfter(v interface{}, mark *list.Element) *list.Element {
-    l.mu.Lock()
-    r := l.list.InsertAfter(v, mark)
-    l.mu.Unlock()
-    return r
+func (l *List) InsertAfter(v interface{}, mark *Element) *Element {
+    if mark.list != l {
+        return nil
+    }
+    return l.insertValue(v, mark)
 }
 
 // 在list 中元素mark之前插入一个值为v的元素，并返回该元素，如果mark不是list中元素，则list不改变。
-func (l *List) InsertBefore(v interface{}, mark *list.Element) *list.Element {
-    l.mu.Lock()
-    r := l.list.InsertBefore(v, mark)
-    l.mu.Unlock()
-    return r
+func (l *List) InsertBefore(v interface{}, mark *Element) *Element {
+    if mark.list != l {
+        return nil
+    }
+    return l.insertValue(v, mark.getPrev())
 }
 
-
 // 批量往链表头入栈数据项
 func (l *List) BatchPushFront(vs []interface{}) {
-	l.mu.Lock()
 	for _, item := range vs {
-		l.list.PushFront(item)
+		l.PushFront(item)
 	}
-	l.mu.Unlock()
 }
 
 // 从链表尾端出栈数据项(删除)
 func (l *List) PopBack() interface{} {
-	l.mu.Lock()
-	if elem := l.list.Back(); elem != nil {
-		item := l.list.Remove(elem)
-		l.mu.Unlock()
-		return item
+	if e := l.Back(); e != nil {
+		return l.Remove(e)
 	}
-	l.mu.Unlock()
 	return nil
 }
 
 // 从链表头端出栈数据项(删除)
 func (l *List) PopFront() interface{} {
-	l.mu.Lock()
-	if elem := l.list.Front(); elem != nil {
-		item := l.list.Remove(elem)
-		l.mu.Unlock()
-		return item
+	if e := l.Front(); e != nil {
+		return l.Remove(e)
 	}
-	l.mu.Unlock()
 	return nil
 }
 
 // 批量从链表尾端出栈数据项(删除)
 func (l *List) BatchPopBack(max int) []interface{} {
-	l.mu.Lock()
-	count := l.list.Len()
+	count := l.Len()
 	if count == 0 {
-		l.mu.Unlock()
 		return []interface{}{}
 	}
-
 	if count > max {
 		count = max
 	}
 	items := make([]interface{}, count)
 	for i := 0; i < count; i++ {
-		items[i] = l.list.Remove(l.list.Back())
+		items[i] = l.PopBack()
 	}
-	l.mu.Unlock()
 	return items
 }
 
 // 批量从链表头端出栈数据项(删除)
 func (l *List) BatchPopFront(max int) []interface{} {
-	l.mu.Lock()
-	count := l.list.Len()
+	count := l.Len()
 	if count == 0 {
-		l.mu.Unlock()
 		return []interface{}{}
 	}
-
 	if count > max {
 		count = max
 	}
 	items := make([]interface{}, count)
 	for i := 0; i < count; i++ {
-		items[i] = l.list.Remove(l.list.Front())
+		items[i] = l.PopFront()
 	}
-	l.mu.Unlock()
 	return items
 }
 
 // 批量从链表尾端依次获取所有数据(删除)
 func (l *List) PopBackAll() []interface{} {
-	l.mu.Lock()
-	count := l.list.Len()
-	if count == 0 {
-		l.mu.Unlock()
-		return []interface{}{}
-	}
-	items := make([]interface{}, count)
-	for i := 0; i < count; i++ {
-		items[i] = l.list.Remove(l.list.Back())
-	}
-	l.mu.Unlock()
-	return items
+	return l.BatchPopFront(l.Len())
 }
 
 // 批量从链表头端依次获取所有数据(删除)
 func (l *List) PopFrontAll() []interface{} {
-    l.mu.Lock()
-    count := l.list.Len()
-    if count == 0 {
-        l.mu.Unlock()
-        return []interface{}{}
-    }
-    items := make([]interface{}, count)
-    for i := 0; i < count; i++ {
-        items[i] = l.list.Remove(l.list.Front())
-    }
-    l.mu.Unlock()
-    return items
+    return l.BatchPopFront(l.Len())
 }
 
-// 删除数据项
-func (l *List) Remove(e *list.Element) interface{} {
-	l.mu.Lock()
-	r := l.list.Remove(e)
-	l.mu.Unlock()
-	return r
+// 删除数据项e
+func (l *List) Remove(e *Element) interface{} {
+    if e.list == l {
+        l.remove(e)
+    }
+    return e.Value()
 }
 
 // 删除所有数据项
 func (l *List) RemoveAll() {
-	l.mu.Lock()
-	l.list = list.New()
-	l.mu.Unlock()
+    l.length.Set(0)
+    l.root.setNext(l.root)
+    l.root.setPrev(l.root)
 }
 
 // 从链表头获取所有数据(不删除)
 func (l *List) FrontAll() []interface{} {
-	l.mu.RLock()
-	count := l.list.Len()
+	count := l.Len()
 	if count == 0 {
-        l.mu.RUnlock()
 		return []interface{}{}
 	}
-
 	items := make([]interface{}, 0, count)
-	for e := l.list.Front(); e != nil; e = e.Next() {
-		items = append(items, e.Value)
+	for e := l.Front(); e != nil; e = e.Next() {
+		items = append(items, e.Value())
 	}
-    l.mu.RUnlock()
 	return items
 }
 
 // 从链表尾获取所有数据(不删除)
 func (l *List) BackAll() []interface{} {
-	l.mu.RLock()
-	count := l.list.Len()
+	count := l.Len()
 	if count == 0 {
-        l.mu.RUnlock()
 		return []interface{}{}
 	}
-
 	items := make([]interface{}, 0, count)
-	for e := l.list.Back(); e != nil; e = e.Prev() {
-		items = append(items, e.Value)
+	for e := l.Back(); e != nil; e = e.Prev() {
+		items = append(items, e.Value())
 	}
-    l.mu.RUnlock()
 	return items
 }
 
 // 获取链表头值(不删除)
 func (l *List) FrontItem() interface{} {
-	l.mu.RLock()
-	if f := l.list.Front(); f != nil {
-		l.mu.RUnlock()
-		return f.Value
+	if e := l.Front(); e != nil {
+		return e.Value()
 	}
-
-	l.mu.RUnlock()
 	return nil
 }
 
 // 获取链表尾值(不删除)
 func (l *List) BackItem() interface{} {
-    l.mu.RLock()
-    if f := l.list.Back(); f != nil {
-        l.mu.RUnlock()
-        return f.Value
+    if e := l.Back(); e != nil {
+        return e.Value()
     }
-
-    l.mu.RUnlock()
     return nil
 }
 
 // 获取表头指针
-func (l *List) Front() *list.Element {
-    l.mu.RLock()
-    r := l.list.Front()
-    l.mu.RUnlock()
-    return r
+func (l *List) Front() *Element {
+    if l.length.Val() == 0 {
+        return nil
+    }
+    return l.root.getNext()
 }
 
 // 获取表位指针
-func (l *List) Back() *list.Element {
-    l.mu.RLock()
-    r := l.list.Back()
-    l.mu.RUnlock()
-    return r
+func (l *List) Back() *Element {
+    if l.length.Val() == 0 {
+        return nil
+    }
+    return l.root.getPrev()
 }
 
 // 获取链表长度
 func (l *List) Len() int {
-	l.mu.RLock()
-    length := l.list.Len()
-	l.mu.RUnlock()
-	return length
+	return l.length.Val()
 }
 
-// 读锁操作
-func (l *List) RLockFunc(f func(l *list.List)) {
-	l.mu.RLock()
-	defer l.mu.RUnlock()
-	f(l.list)
+func (l *List) MoveBefore(e, mark *Element) {
+    if e.list != l || e == mark || mark.list != l {
+        return
+    }
+    l.insert(l.remove(e), mark.getPrev())
 }
 
-// 写锁操作
-func (l *List) LockFunc(f func(l *list.List)) {
-    l.mu.Lock()
-    defer l.mu.Unlock()
-    f(l.list)
+func (l *List) MoveAfter(e, mark *Element) {
+    if e.list != l || e == mark || mark.list != l {
+        return
+    }
+    l.insert(l.remove(e), mark)
+}
+
+func (l *List) MoveToFront(e *Element) {
+    if e.list != l || l.root.getNext() == e {
+        return
+    }
+    l.insert(l.remove(e), l.root)
+}
+
+func (l *List) MoveToBack(e *Element) {
+    if e.list != l || l.root.getPrev() == e {
+        return
+    }
+    l.insert(l.remove(e), l.root.getPrev())
+}
+
+func (l *List) PushBackList(other *List) {
+    for i, e := other.Len(), other.Front(); i > 0; i, e = i - 1, e.Next() {
+        l.insertValue(e.Value(), l.root.getPrev())
+    }
+}
+
+func (l *List) PushFrontList(other *List) {
+    for i, e := other.Len(), other.Back(); i > 0; i, e = i - 1, e.Prev() {
+        l.insertValue(e.Value(), l.root)
+    }
+}
+
+// 在元素项p后添加数值value, 自动创建元素项
+func (l *List) insertValue(value interface{}, p *Element) *Element {
+    return l.insert(newElement(value, l.safe), p)
+}
+
+// 在元素项p后添加元素项e
+func (l *List) insert(e, p *Element) *Element {
+    p.LockFunc(func(p *Element) {
+        e.LockFunc(func(e *Element) {
+            n     := p.next
+            p.next = e
+            e.prev = p
+            e.next = n
+            n.prev = e
+            e.list = l
+        })
+    })
+    l.length.Add(1)
+    return e
+}
+
+// 从列表中删除元素项e
+func (l *List) remove(e *Element) *Element {
+    e.LockFunc(func(e *Element) {
+        e.prev.setNext(e.next)
+        e.next.setPrev(e.prev)
+        e.next      = nil
+        e.prev      = nil
+        e.list      = nil
+    })
+    l.length.Add(-1)
+    return e
 }
diff --git a/g/container/glist/glist_element.go b/g/container/glist/glist_element.go
new file mode 100644
index 000000000..989ee13c8
--- /dev/null
+++ b/g/container/glist/glist_element.go
@@ -0,0 +1,103 @@
+// Copyright 2019 gf Author(https://gitee.com/johng/gf). All Rights Reserved.
+//
+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with l file,
+// You can obtain one at https://gitee.com/johng/gf.
+//
+
+package glist
+
+import (
+    "gitee.com/johng/gf/g/container/internal/rwmutex"
+)
+
+// 链表元素项
+type Element struct {
+	mu    *rwmutex.RWMutex
+    list  *List
+    prev  *Element
+    next  *Element
+    value interface{}
+}
+
+// 创建一个并发安全的列表元素项
+func newElement(value interface{}, safe...bool) *Element {
+	return &Element {
+	    mu    : rwmutex.New(safe...),
+		value : value,
+    }
+}
+
+// 获得元素项值
+func (e *Element) Value() interface{} {
+	e.mu.RLock()
+	r := e.value
+	e.mu.RUnlock()
+	return r
+}
+
+// 获得下一个元素项(遍历使用)
+func (e *Element) Next() *Element {
+    e.mu.RLock()
+    defer e.mu.RUnlock()
+    if p := e.next; e.list != nil && p != e.list.root {
+        return p
+    }
+    return nil
+}
+
+// 获得前一个元素项(遍历使用)
+func (e *Element) Prev() *Element {
+    e.mu.RLock()
+    defer e.mu.RUnlock()
+    if p := e.prev; e.list != nil && p != e.list.root {
+        return p
+    }
+    return nil
+}
+
+// 只读锁操作
+func (e *Element) RLockFunc(f func(e *Element)) {
+    e.mu.RLock()
+    defer e.mu.RUnlock()
+    f(e)
+}
+
+// 写锁操作
+func (e *Element) LockFunc(f func(e *Element)) {
+    e.mu.Lock()
+    defer e.mu.Unlock()
+    f(e)
+}
+
+func (e *Element) setPrev(prev *Element) (old *Element) {
+    e.mu.Lock()
+    old    = e.prev
+    e.prev = prev
+    e.mu.Unlock()
+    return
+}
+
+func (e *Element) setNext(next *Element) (old *Element) {
+    e.mu.Lock()
+    old    = e.next
+    e.next = next
+    e.mu.Unlock()
+    return
+}
+
+// 获得前一个元素项(内部并发安全使用)
+func (e *Element) getPrev() (prev *Element) {
+    e.mu.RLock()
+    prev = e.prev
+    e.mu.RUnlock()
+    return
+}
+
+// 获得下一个元素项(内部并发安全使用)
+func (e *Element) getNext() (next *Element) {
+    e.mu.RLock()
+    next = e.next
+    e.mu.RUnlock()
+    return
+}
\ No newline at end of file
diff --git a/g/container/glist/glist_test.go b/g/container/glist/glist_z_bench_test.go
similarity index 100%
rename from g/container/glist/glist_test.go
rename to g/container/glist/glist_z_bench_test.go
diff --git a/g/container/glist/glist_z_unit_test.go b/g/container/glist/glist_z_unit_test.go
new file mode 100644
index 000000000..759f504d9
--- /dev/null
+++ b/g/container/glist/glist_z_unit_test.go
@@ -0,0 +1,354 @@
+// Copyright 2019 gf Author(https://gitee.com/johng/gf). All Rights Reserved.
+//
+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file,
+// You can obtain one at https://gitee.com/johng/gf.
+
+package glist
+
+import "testing"
+
+func checkListLen(t *testing.T, l *List, len int) bool {
+    if n := l.Len(); n != len {
+        t.Errorf("l.Len() = %d, want %d", n, len)
+        return false
+    }
+    return true
+}
+
+func checkListPointers(t *testing.T, l *List, es []*Element) {
+    root := l.root
+
+    if !checkListLen(t, l, len(es)) {
+        return
+    }
+
+    // zero length lists must be the zero value or properly initialized (sentinel circle)
+    if len(es) == 0 {
+        if l.root.next != nil && l.root.next != root || l.root.prev != nil && l.root.prev != root {
+            t.Errorf("l.root.next = %p, l.root.prev = %p; both should both be nil or %p", l.root.next, l.root.prev, root)
+        }
+        return
+    }
+    // len(es) > 0
+
+    // check internal and external prev/next connections
+    for i, e := range es {
+        prev := root
+        Prev := (*Element)(nil)
+        if i > 0 {
+            prev = es[i-1]
+            Prev = prev
+        }
+        if p := e.prev; p != prev {
+            t.Errorf("elt[%d](%p).prev = %p, want %p", i, e, p, prev)
+        }
+        if p := e.Prev(); p != Prev {
+            t.Errorf("elt[%d](%p).Prev() = %p, want %p", i, e, p, Prev)
+        }
+
+        next := root
+        Next := (*Element)(nil)
+        if i < len(es)-1 {
+            next = es[i+1]
+            Next = next
+        }
+        if n := e.next; n != next {
+            t.Errorf("elt[%d](%p).next = %p, want %p", i, e, n, next)
+        }
+        if n := e.Next(); n != Next {
+            t.Errorf("elt[%d](%p).Next() = %p, want %p", i, e, n, Next)
+        }
+    }
+}
+
+func TestList(t *testing.T) {
+    l := New()
+    checkListPointers(t, l, []*Element{})
+
+    // Single element list
+    e := l.PushFront("a")
+    checkListPointers(t, l, []*Element{e})
+    l.MoveToFront(e)
+    checkListPointers(t, l, []*Element{e})
+    l.MoveToBack(e)
+    checkListPointers(t, l, []*Element{e})
+    l.Remove(e)
+    checkListPointers(t, l, []*Element{})
+
+    // Bigger list
+    e2 := l.PushFront(2)
+    e1 := l.PushFront(1)
+    e3 := l.PushBack(3)
+    e4 := l.PushBack("banana")
+    checkListPointers(t, l, []*Element{e1, e2, e3, e4})
+
+    l.Remove(e2)
+    checkListPointers(t, l, []*Element{e1, e3, e4})
+
+    l.MoveToFront(e3) // move from middle
+    checkListPointers(t, l, []*Element{e3, e1, e4})
+
+    l.MoveToFront(e1)
+    l.MoveToBack(e3) // move from middle
+    checkListPointers(t, l, []*Element{e1, e4, e3})
+
+    l.MoveToFront(e3) // move from back
+    checkListPointers(t, l, []*Element{e3, e1, e4})
+    l.MoveToFront(e3) // should be no-op
+    checkListPointers(t, l, []*Element{e3, e1, e4})
+
+    l.MoveToBack(e3) // move from front
+    checkListPointers(t, l, []*Element{e1, e4, e3})
+    l.MoveToBack(e3) // should be no-op
+    checkListPointers(t, l, []*Element{e1, e4, e3})
+
+    e2 = l.InsertBefore(2, e1) // insert before front
+    checkListPointers(t, l, []*Element{e2, e1, e4, e3})
+    l.Remove(e2)
+    e2 = l.InsertBefore(2, e4) // insert before middle
+    checkListPointers(t, l, []*Element{e1, e2, e4, e3})
+    l.Remove(e2)
+    e2 = l.InsertBefore(2, e3) // insert before back
+    checkListPointers(t, l, []*Element{e1, e4, e2, e3})
+    l.Remove(e2)
+
+    e2 = l.InsertAfter(2, e1) // insert after front
+    checkListPointers(t, l, []*Element{e1, e2, e4, e3})
+    l.Remove(e2)
+    e2 = l.InsertAfter(2, e4) // insert after middle
+    checkListPointers(t, l, []*Element{e1, e4, e2, e3})
+    l.Remove(e2)
+    e2 = l.InsertAfter(2, e3) // insert after back
+    checkListPointers(t, l, []*Element{e1, e4, e3, e2})
+    l.Remove(e2)
+
+    // Check standard iteration.
+    sum := 0
+    for e := l.Front(); e != nil; e = e.Next() {
+        if i, ok := e.Value().(int); ok {
+            sum += i
+        }
+    }
+    if sum != 4 {
+        t.Errorf("sum over l = %d, want 4", sum)
+    }
+
+    // Clear all elements by iterating
+    var next *Element
+    for e := l.Front(); e != nil; e = next {
+        next = e.Next()
+        l.Remove(e)
+    }
+    checkListPointers(t, l, []*Element{})
+}
+
+func checkList(t *testing.T, l *List, es []interface{}) {
+    if !checkListLen(t, l, len(es)) {
+        return
+    }
+
+    i := 0
+    for e := l.Front(); e != nil; e = e.Next() {
+        le := e.Value().(int)
+        if le != es[i] {
+            t.Errorf("elt[%d].Value() = %v, want %v", i, le, es[i])
+        }
+        i++
+    }
+}
+
+func TestExtending(t *testing.T) {
+    l1 := New()
+    l2 := New()
+
+    l1.PushBack(1)
+    l1.PushBack(2)
+    l1.PushBack(3)
+
+    l2.PushBack(4)
+    l2.PushBack(5)
+
+    l3 := New()
+    l3.PushBackList(l1)
+    checkList(t, l3, []interface{}{1, 2, 3})
+    l3.PushBackList(l2)
+    checkList(t, l3, []interface{}{1, 2, 3, 4, 5})
+
+    l3 = New()
+    l3.PushFrontList(l2)
+    checkList(t, l3, []interface{}{4, 5})
+    l3.PushFrontList(l1)
+    checkList(t, l3, []interface{}{1, 2, 3, 4, 5})
+
+    checkList(t, l1, []interface{}{1, 2, 3})
+    checkList(t, l2, []interface{}{4, 5})
+
+    l3 = New()
+    l3.PushBackList(l1)
+    checkList(t, l3, []interface{}{1, 2, 3})
+    l3.PushBackList(l3)
+    checkList(t, l3, []interface{}{1, 2, 3, 1, 2, 3})
+
+    l3 = New()
+    l3.PushFrontList(l1)
+    checkList(t, l3, []interface{}{1, 2, 3})
+    l3.PushFrontList(l3)
+    checkList(t, l3, []interface{}{1, 2, 3, 1, 2, 3})
+
+    l3 = New()
+    l1.PushBackList(l3)
+    checkList(t, l1, []interface{}{1, 2, 3})
+    l1.PushFrontList(l3)
+    checkList(t, l1, []interface{}{1, 2, 3})
+}
+
+func TestRemove(t *testing.T) {
+    l := New()
+    e1 := l.PushBack(1)
+    e2 := l.PushBack(2)
+    checkListPointers(t, l, []*Element{e1, e2})
+    e := l.Front()
+    l.Remove(e)
+    checkListPointers(t, l, []*Element{e2})
+    l.Remove(e)
+    checkListPointers(t, l, []*Element{e2})
+}
+
+func TestIssue4103(t *testing.T) {
+    l1 := New()
+    l1.PushBack(1)
+    l1.PushBack(2)
+
+    l2 := New()
+    l2.PushBack(3)
+    l2.PushBack(4)
+
+    e := l1.Front()
+    l2.Remove(e) // l2 should not change because e is not an element of l2
+    if n := l2.Len(); n != 2 {
+        t.Errorf("l2.Len() = %d, want 2", n)
+    }
+
+    l1.InsertBefore(8, e)
+    if n := l1.Len(); n != 3 {
+        t.Errorf("l1.Len() = %d, want 3", n)
+    }
+}
+
+func TestIssue6349(t *testing.T) {
+    l := New()
+    l.PushBack(1)
+    l.PushBack(2)
+
+    e := l.Front()
+    l.Remove(e)
+    if e.Value() != 1 {
+        t.Errorf("e.value = %d, want 1", e.Value())
+    }
+    if e.Next() != nil {
+        t.Errorf("e.Next() != nil")
+    }
+    if e.Prev() != nil {
+        t.Errorf("e.Prev() != nil")
+    }
+}
+
+func TestMove(t *testing.T) {
+    l := New()
+    e1 := l.PushBack(1)
+    e2 := l.PushBack(2)
+    e3 := l.PushBack(3)
+    e4 := l.PushBack(4)
+
+    l.MoveAfter(e3, e3)
+    checkListPointers(t, l, []*Element{e1, e2, e3, e4})
+    l.MoveBefore(e2, e2)
+    checkListPointers(t, l, []*Element{e1, e2, e3, e4})
+
+    l.MoveAfter(e3, e2)
+    checkListPointers(t, l, []*Element{e1, e2, e3, e4})
+    l.MoveBefore(e2, e3)
+    checkListPointers(t, l, []*Element{e1, e2, e3, e4})
+
+    l.MoveBefore(e2, e4)
+    checkListPointers(t, l, []*Element{e1, e3, e2, e4})
+    e2, e3 = e3, e2
+
+    l.MoveBefore(e4, e1)
+    checkListPointers(t, l, []*Element{e4, e1, e2, e3})
+    e1, e2, e3, e4 = e4, e1, e2, e3
+
+    l.MoveAfter(e4, e1)
+    checkListPointers(t, l, []*Element{e1, e4, e2, e3})
+    e2, e3, e4 = e4, e2, e3
+
+    l.MoveAfter(e2, e3)
+    checkListPointers(t, l, []*Element{e1, e3, e2, e4})
+    e2, e3 = e3, e2
+}
+
+// Test PushFront, PushBack, PushFrontList, PushBackList with uninitialized List
+func TestZeroList(t *testing.T) {
+    var l1 = New()
+    l1.PushFront(1)
+    checkList(t, l1, []interface{}{1})
+
+    var l2 = New()
+    l2.PushBack(1)
+    checkList(t, l2, []interface{}{1})
+
+    var l3 = New()
+    l3.PushFrontList(l1)
+    checkList(t, l3, []interface{}{1})
+
+    var l4 = New()
+    l4.PushBackList(l2)
+    checkList(t, l4, []interface{}{1})
+}
+
+// Test that a list l is not modified when calling InsertBefore with a mark that is not an element of l.
+func TestInsertBeforeUnknownMark(t *testing.T) {
+    l := New()
+    l.PushBack(1)
+    l.PushBack(2)
+    l.PushBack(3)
+    l.InsertBefore(1, new(Element))
+    checkList(t, l, []interface{}{1, 2, 3})
+}
+
+// Test that a list l is not modified when calling InsertAfter with a mark that is not an element of l.
+func TestInsertAfterUnknownMark(t *testing.T) {
+    l := New()
+    l.PushBack(1)
+    l.PushBack(2)
+    l.PushBack(3)
+    l.InsertAfter(1, new(Element))
+    checkList(t, l, []interface{}{1, 2, 3})
+}
+
+// Test that a list l is not modified when calling MoveAfter or MoveBefore with a mark that is not an element of l.
+func TestMoveUnknownMark(t *testing.T) {
+    l1 := New()
+    e1 := l1.PushBack(1)
+
+    l2 := New()
+    e2 := l2.PushBack(2)
+
+    l1.MoveAfter(e1, e2)
+    checkList(t, l1, []interface{}{1})
+    checkList(t, l2, []interface{}{2})
+
+    l1.MoveBefore(e1, e2)
+    checkList(t, l1, []interface{}{1})
+    checkList(t, l2, []interface{}{2})
+}
+
+func TestList_RemoveAll(t *testing.T) {
+    l := New()
+    l.PushBack(1)
+    l.RemoveAll()
+    checkList(t, l, []interface{}{})
+    l.PushBack(2)
+    checkList(t, l, []interface{}{2})
+}
\ No newline at end of file
diff --git a/g/container/gpool/gpool.go b/g/container/gpool/gpool.go
index 7381df2f9..527f8c512 100644
--- a/g/container/gpool/gpool.go
+++ b/g/container/gpool/gpool.go
@@ -12,7 +12,7 @@ import (
     "gitee.com/johng/gf/g/container/glist"
     "gitee.com/johng/gf/g/container/gtype"
     "gitee.com/johng/gf/g/os/gtime"
-    "gitee.com/johng/gf/g/os/gtimew"
+    "gitee.com/johng/gf/g/os/gwheel"
 )
 
 // 对象池
@@ -43,7 +43,7 @@ func New(expire int, newFunc...func() (interface{}, error)) *Pool {
     if len(newFunc) > 0 {
         r.NewFunc = newFunc[0]
     }
-    gtimew.AddSingleton(1, r.checkExpire)
+    gwheel.AddSingleton(1, r.checkExpire)
     return r
 }
 
@@ -101,7 +101,7 @@ func (p *Pool) Close() {
 // 超时检测循环
 func (p *Pool) checkExpire() {
     if p.closed.Val() {
-        gtimew.ExitJob()
+        gwheel.ExitJob()
     }
     for {
         if r := p.list.PopFront(); r != nil {
diff --git a/g/os/gcache/gcache_cache.go b/g/os/gcache/gcache_cache.go
index a25b20ca5..df7302b8b 100644
--- a/g/os/gcache/gcache_cache.go
+++ b/g/os/gcache/gcache_cache.go
@@ -7,7 +7,7 @@
 package gcache
 
 import (
-    "gitee.com/johng/gf/g/os/gtimew"
+    "gitee.com/johng/gf/g/os/gwheel"
     "sync/atomic"
     "unsafe"
 )
@@ -23,7 +23,7 @@ func New(lruCap...int) *Cache {
     c := &Cache {
         memCache : newMemCache(lruCap...),
     }
-    gtimew.AddSingleton(1, c.syncEventAndClearExpired)
+    gwheel.AddSingleton(1, c.syncEventAndClearExpired)
     return c
 }
 
diff --git a/g/os/gcache/gcache_mem_cache.go b/g/os/gcache/gcache_mem_cache.go
index fd53a952a..8aa74213f 100644
--- a/g/os/gcache/gcache_mem_cache.go
+++ b/g/os/gcache/gcache_mem_cache.go
@@ -11,7 +11,7 @@ import (
     "gitee.com/johng/gf/g/container/gset"
     "gitee.com/johng/gf/g/container/gtype"
     "gitee.com/johng/gf/g/os/gtime"
-    "gitee.com/johng/gf/g/os/gtimew"
+    "gitee.com/johng/gf/g/os/gwheel"
     "gitee.com/johng/gf/g/util/gconv"
     "math"
     "sync"
@@ -292,7 +292,7 @@ func (c *memCache) syncEventAndClearExpired() {
     oldExpireTime := int64(0)
     newExpireTime := int64(0)
     if c.closed.Val() {
-        gtimew.ExitJob()
+        gwheel.ExitJob()
         return
     }
     // ========================
diff --git a/g/os/gcache/gcache_mem_cache_lru.go b/g/os/gcache/gcache_mem_cache_lru.go
index bc2588014..b95680ffe 100644
--- a/g/os/gcache/gcache_mem_cache_lru.go
+++ b/g/os/gcache/gcache_mem_cache_lru.go
@@ -7,12 +7,11 @@
 package gcache
 
 import (
-    "container/list"
     "fmt"
     "gitee.com/johng/gf/g/container/glist"
     "gitee.com/johng/gf/g/container/gmap"
     "gitee.com/johng/gf/g/container/gtype"
-    "gitee.com/johng/gf/g/os/gtimew"
+    "gitee.com/johng/gf/g/os/gwheel"
 )
 
 // LRU算法实现对象，底层双向链表使用了标准库的list.List
@@ -33,7 +32,7 @@ func newMemCacheLru(cache *memCache) *memCacheLru {
         rawList   : glist.New(),
         closed    : gtype.NewBool(),
     }
-    gtimew.AddSingleton(1, lru.SyncAndClear)
+    gwheel.AddSingleton(1, lru.SyncAndClear)
     return lru
 }
 
@@ -46,7 +45,7 @@ func (lru *memCacheLru) Close() {
 func (lru *memCacheLru) Remove(key interface{}) {
     if v := lru.data.Get(key); v != nil {
         lru.data.Remove(key)
-        lru.list.Remove(v.(*list.Element))
+        lru.list.Remove(v.(*glist.Element))
     }
 }
 
@@ -80,7 +79,7 @@ func (lru *memCacheLru) Print() {
 // 异步执行协程，将queue中的数据同步到list中
 func (lru *memCacheLru) SyncAndClear() {
     if lru.closed.Val() {
-        gtimew.ExitJob()
+        gwheel.ExitJob()
         return
     }
     // 数据同步
@@ -88,7 +87,7 @@ func (lru *memCacheLru) SyncAndClear() {
         if v := lru.rawList.PopFront(); v != nil {
             // 删除对应链表项
             if v := lru.data.Get(v); v != nil {
-                lru.list.Remove(v.(*list.Element))
+                lru.list.Remove(v.(*glist.Element))
             }
             // 将数据插入到链表头，并记录对应的链表项到哈希表中，便于检索
             lru.data.Set(v, lru.list.PushFront(v))
diff --git a/g/os/gcron/gcron_cron.go b/g/os/gcron/gcron_cron.go
index 15e4273a6..4d1752365 100644
--- a/g/os/gcron/gcron_cron.go
+++ b/g/os/gcron/gcron_cron.go
@@ -12,7 +12,7 @@ import (
     "gitee.com/johng/gf/g/container/garray"
     "gitee.com/johng/gf/g/container/gmap"
     "gitee.com/johng/gf/g/container/gtype"
-    "gitee.com/johng/gf/g/os/gtimew"
+    "gitee.com/johng/gf/g/os/gwheel"
     "strconv"
 )
 
@@ -76,7 +76,7 @@ func (c *Cron) AddOnce(pattern string, job func(), name ... string) (*Entry, err
 
 // 延迟添加定时任务，delay参数单位为秒
 func (c *Cron) DelayAdd(delay int, pattern string, job func(), name ... string) {
-    gtimew.AddOnce(delay, func() {
+    gwheel.AddOnce(delay, func() {
         if _, err := c.Add(pattern, job, name ...); err != nil {
             panic(err)
         }
@@ -85,7 +85,7 @@ func (c *Cron) DelayAdd(delay int, pattern string, job func(), name ... string)
 
 // 延迟添加单例定时任务，delay参数单位为秒
 func (c *Cron) DelayAddSingleton(delay int, pattern string, job func(), name ... string) {
-    gtimew.AddOnce(delay, func() {
+    gwheel.AddOnce(delay, func() {
         if _, err := c.AddSingleton(pattern, job, name ...); err != nil {
             panic(err)
         }
@@ -94,7 +94,7 @@ func (c *Cron) DelayAddSingleton(delay int, pattern string, job func(), name ...
 
 // 延迟添加只运行一次的定时任务，delay参数单位为秒
 func (c *Cron) DelayAddOnce(delay int, pattern string, job func(), name ... string) {
-    gtimew.AddOnce(delay, func() {
+    gwheel.AddOnce(delay, func() {
         if _, err := c.AddOnce(pattern, job, name ...); err != nil {
             panic(err)
         }
diff --git a/g/os/gcron/gcron_jobloop.go b/g/os/gcron/gcron_jobloop.go
index 91cb686ec..73f7b7a96 100644
--- a/g/os/gcron/gcron_jobloop.go
+++ b/g/os/gcron/gcron_jobloop.go
@@ -7,15 +7,15 @@
 package gcron
 
 import (
-    "gitee.com/johng/gf/g/os/gtimew"
+    "gitee.com/johng/gf/g/os/gwheel"
     "time"
 )
 
 // 延迟添加定时任务，delay参数单位为秒
 func (c *Cron) startLoop() {
-    gtimew.Add(1, func() {
+    gwheel.Add(1, func() {
         if c.status.Val() == STATUS_CLOSED {
-            gtimew.ExitJob()
+            gwheel.ExitJob()
         }
         if c.status.Val() == STATUS_RUNNING {
             go c.checkEntries(time.Now())
diff --git a/g/os/gcron/gcron_unit_1_test.go b/g/os/gcron/gcron_unit_1_test.go
index 3f53ea83b..28f8b3417 100644
--- a/g/os/gcron/gcron_unit_1_test.go
+++ b/g/os/gcron/gcron_unit_1_test.go
@@ -8,6 +8,7 @@
 package gcron_test
 
 import (
+    "fmt"
     "gitee.com/johng/gf/g/container/garray"
     "gitee.com/johng/gf/g/os/gcron"
     "gitee.com/johng/gf/g/util/gtest"
@@ -52,9 +53,10 @@ func TestCron_Method(t *testing.T) {
     gtest.Case(func() {
         cron  := gcron.New()
         cron.Add("* * * * * *", func() {}, "add")
+        fmt.Println("start", time.Now())
         cron.DelayAdd(1, "* * * * * *", func() {}, "delay_add")
         gtest.Assert(cron.Size(), 1)
-        time.Sleep(1500*time.Millisecond)
+        time.Sleep(1200*time.Millisecond)
         gtest.Assert(cron.Size(), 2)
 
         cron.Remove("delay_add")
diff --git a/g/os/gfsnotify/gfsnotify.go b/g/os/gfsnotify/gfsnotify.go
index c141f7eff..dbc8096b8 100644
--- a/g/os/gfsnotify/gfsnotify.go
+++ b/g/os/gfsnotify/gfsnotify.go
@@ -8,9 +8,9 @@
 package gfsnotify
 
 import (
-    "container/list"
     "errors"
     "fmt"
+    "gitee.com/johng/gf/g/container/glist"
     "gitee.com/johng/gf/g/container/gmap"
     "gitee.com/johng/gf/g/container/gqueue"
     "gitee.com/johng/gf/g/container/gtype"
@@ -32,7 +32,7 @@ type Callback struct {
     Id        int                 // 唯一ID
     Func      func(event *Event)  // 回调方法
     Path      string              // 监听的文件/目录
-    elem      *list.Element       // 指向回调函数链表中的元素项位置(便于删除)
+    elem      *glist.Element      // 指向回调函数链表中的元素项位置(便于删除)
     recursive bool                // 当目录时，是否递归监听(使用在子文件/目录回溯查找回调函数时)
 }
 
diff --git a/g/os/gmlock/gmlock_locker.go b/g/os/gmlock/gmlock_locker.go
index 12e105316..912f98b77 100644
--- a/g/os/gmlock/gmlock_locker.go
+++ b/g/os/gmlock/gmlock_locker.go
@@ -8,7 +8,7 @@ package gmlock
 
 import (
     "gitee.com/johng/gf/g/container/gmap"
-    "gitee.com/johng/gf/g/os/gtimew"
+    "gitee.com/johng/gf/g/os/gwheel"
 )
 
 // 内存锁管理对象
@@ -78,7 +78,7 @@ func (l *Locker) doLock(key string, expire int, try bool) bool {
     if ok && expire > 0 {
         // 异步goroutine计时处理
         wid := mu.wid.Val()
-        gtimew.AddOnce(expire, func() {
+        gwheel.AddOnce(expire, func() {
             if wid == mu.wid.Val() {
                 mu.Unlock()
             }
@@ -98,7 +98,7 @@ func (l *Locker) doRLock(key string, expire int, try bool) bool {
     }
     if ok && expire > 0 {
         rid := mu.rid.Val()
-        gtimew.AddOnce(expire, func() {
+        gwheel.AddOnce(expire, func() {
             if rid == mu.rid.Val() {
                 mu.RUnlock()
             }
diff --git a/g/os/gtimew/gtimew_entry.go b/g/os/gtimew/gtimew_entry.go
deleted file mode 100644
index 671557d97..000000000
--- a/g/os/gtimew/gtimew_entry.go
+++ /dev/null
@@ -1,70 +0,0 @@
-// Copyright 2019 gf Author(https://gitee.com/johng/gf). All Rights Reserved.
-//
-// This Source Code Form is subject to the terms of the MIT License.
-// If a copy of the MIT was not distributed with this file,
-// You can obtain one at https://gitee.com/johng/gf.
-
-package gtimew
-
-import (
-    "gitee.com/johng/gf/g/container/gtype"
-    "time"
-)
-
-// 循环任务项
-type Entry struct {
-    mode      *gtype.Int    // 任务运行模式(0: normal; 1: singleton; 2: once)
-    status    *gtype.Int    // 循环任务状态(0: ready;  1: running;  -1: stopped)
-    Job       JobFunc       // 注册循环任务方法
-    Create    int64         // 创建时间戳(秒)
-    Interval  int64         // 运行间隔(秒)
-}
-
-// 任务执行方法
-type JobFunc func()
-
-// 创建循环任务
-func newEntry(interval int, job JobFunc, mode int) *Entry {
-    return &Entry {
-        mode      : gtype.NewInt(mode),
-        status    : gtype.NewInt(),
-        Job       : job,
-        Create    : time.Now().Unix(),
-        Interval  : int64(interval),
-    }
-}
-
-// 获取任务运行模式
-func (entry *Entry) Mode() int {
-    return entry.mode.Val()
-}
-
-// 设置任务运行模式(0: normal; 1: singleton; 2: once)
-func (entry *Entry) SetMode(mode int) {
-    entry.mode.Set(mode)
-}
-
-// 循环任务状态
-func (entry *Entry) Status() int {
-    return entry.status.Val()
-}
-
-// 启动循环任务
-func (entry *Entry) Start() {
-    entry.status.Set(STATUS_READY)
-}
-
-// 停止循环任务
-func (entry *Entry) Stop() {
-    entry.status.Set(STATUS_CLOSED)
-}
-
-// 给定时间是否满足当前循环任务运行间隔
-func (entry *Entry) Meet(t time.Time) bool {
-    diff := t.Unix() - entry.Create
-    if diff > 0 {
-        return diff%entry.Interval == 0
-    }
-    return false
-}
-
diff --git a/g/os/gtimew/gtimew_jobloop.go b/g/os/gtimew/gtimew_jobloop.go
deleted file mode 100644
index 17039261b..000000000
--- a/g/os/gtimew/gtimew_jobloop.go
+++ /dev/null
@@ -1,72 +0,0 @@
-// Copyright 2019 gf Author(https://gitee.com/johng/gf). All Rights Reserved.
-//
-// This Source Code Form is subject to the terms of the MIT License.
-// If a copy of the MIT was not distributed with this file,
-// You can obtain one at https://gitee.com/johng/gf.
-
-package gtimew
-
-import (
-    "container/list"
-    "time"
-)
-
-// 延迟添加循环任务，delay参数单位为秒
-func (w *Wheel) startLoop() {
-    go func() {
-        for w.status.Val() != STATUS_CLOSED {
-            time.Sleep(time.Second)
-            if w.status.Val() == STATUS_RUNNING {
-                go w.checkEntries(time.Now())
-            }
-        }
-    }()
-}
-
-// 遍历检查可执行循环任务，并异步执行
-func (w *Wheel) checkEntries(t time.Time) {
-    w.entries.RLockFunc(func(l *list.List) {
-        for e := l.Front(); e != nil; e = e.Next() {
-            entry := e.Value.(*Entry)
-            if entry.Meet(t) {
-                // 是否已命令停止运行
-                if entry.status.Val() == STATUS_CLOSED {
-                    continue
-                }
-                // 判断任务的运行模式
-                switch entry.mode.Val() {
-                    // 是否只允许单例运行
-                    case MODE_SINGLETON:
-                        if  entry.status.Set(STATUS_RUNNING) == STATUS_RUNNING {
-                            continue
-                        }
-                    // 只运行一次的任务
-                    case MODE_ONCE:
-                        if  entry.status.Set(STATUS_CLOSED) == STATUS_CLOSED {
-                            continue
-                        }
-                }
-                // 执行异步运行
-                go func(element *list.Element) {
-                    defer func() {
-                        if err := recover(); err != nil {
-                            if err == gPANIC_EXIT {
-                                entry.status.Set(STATUS_CLOSED)
-                            } else {
-                                panic(err)
-                            }
-                        }
-                        if entry.status.Val() != STATUS_CLOSED {
-                            entry.status.Set(STATUS_READY)
-                        } else {
-                            // 异步删除，不受锁机制的影响
-                            w.entries.Remove(element)
-                        }
-                    }()
-
-                    entry.Job()
-                }(e)
-            }
-        }
-    })
-}
\ No newline at end of file
diff --git a/g/os/gtimew/gtimew_unit_1_test.go b/g/os/gtimew/gtimew_unit_1_test.go
deleted file mode 100644
index 7b4afcf19..000000000
--- a/g/os/gtimew/gtimew_unit_1_test.go
+++ /dev/null
@@ -1,150 +0,0 @@
-// Copyright 2018 gf Author(https://gitee.com/johng/gf). All Rights Reserved.
-//
-// This Source Code Form is subject to the terms of the MIT License.
-// If a copy of the MIT was not distributed with this file,
-// You can obtain one at https://gitee.com/johng/gf.
-
-// 包方法操作
-
-package gtimew_test
-
-import (
-    "gitee.com/johng/gf/g/container/garray"
-    "gitee.com/johng/gf/g/os/gtimew"
-    "gitee.com/johng/gf/g/util/gtest"
-    "testing"
-    "time"
-)
-
-func TestWheel_Add_Close(t *testing.T) {
-    gtest.Case(func() {
-        wheel  := gtimew.New()
-        array  := garray.New(0, 0)
-        entry1 := wheel.Add(1, func() {
-            array.Append(1)
-        })
-        entry2 := wheel.Add(1, func() {
-            array.Append(1)
-        })
-        entry3 := wheel.Add(2, func() {
-            array.Append(1)
-        })
-        gtest.AssertNE(entry1, nil)
-        gtest.AssertNE(entry2, nil)
-        gtest.AssertNE(entry3, nil)
-        gtest.Assert(wheel.Size(), 3)
-        time.Sleep(1100*time.Millisecond)
-        gtest.Assert(array.Len(), 2)
-        time.Sleep(1100*time.Millisecond)
-        gtest.Assert(array.Len(), 5)
-        wheel.Close()
-        time.Sleep(1100*time.Millisecond)
-        fixedLength := array.Len()
-        time.Sleep(1100*time.Millisecond)
-        gtest.Assert(array.Len(), fixedLength)
-    })
-}
-
-func TestWheel_Singlton(t *testing.T) {
-    gtest.Case(func() {
-        wheel := gtimew.New()
-        array := garray.New(0, 0)
-        entry := wheel.AddSingleton(1, func() {
-            array.Append(1)
-            time.Sleep(10*time.Second)
-        })
-        gtest.AssertNE(entry, nil)
-        gtest.Assert(wheel.Size(), 1)
-        time.Sleep(1100*time.Millisecond)
-        gtest.Assert(array.Len(), 1)
-
-        time.Sleep(1100*time.Millisecond)
-        gtest.Assert(array.Len(), 1)
-    })
-}
-
-func TestWheel_Once(t *testing.T) {
-    gtest.Case(func() {
-        wheel  := gtimew.New()
-        array  := garray.New(0, 0)
-        entry1 := wheel.AddOnce(1, func() {
-            array.Append(1)
-        })
-        entry2 := wheel.AddOnce(1, func() {
-            array.Append(1)
-        })
-        gtest.AssertNE(entry1, nil)
-        gtest.AssertNE(entry2, nil)
-        time.Sleep(1100*time.Millisecond)
-        gtest.Assert(array.Len(), 2)
-        time.Sleep(1100*time.Millisecond)
-        gtest.Assert(array.Len(), 2)
-        wheel.Close()
-        time.Sleep(1100*time.Millisecond)
-        fixedLength := array.Len()
-        time.Sleep(1100*time.Millisecond)
-        gtest.Assert(array.Len(), fixedLength)
-    })
-}
-
-func TestWheel_DelayAdd(t *testing.T) {
-    gtest.Case(func() {
-        wheel := gtimew.New()
-        wheel.DelayAdd(1, 1, func() {})
-        gtest.Assert(wheel.Size(), 0)
-        time.Sleep(1100*time.Millisecond)
-        gtest.Assert(wheel.Size(), 1)
-    })
-}
-
-func TestWheel_DelayAdd_Singleton(t *testing.T) {
-    gtest.Case(func() {
-        wheel := gtimew.New()
-        array := garray.New(0, 0)
-        wheel.DelayAddSingleton(1, 1, func() {
-            array.Append(1)
-            time.Sleep(10*time.Second)
-        })
-        gtest.Assert(wheel.Size(), 0)
-        time.Sleep(1100*time.Millisecond)
-        gtest.Assert(wheel.Size(), 1)
-        gtest.Assert(array.Len(), 0)
-
-        time.Sleep(1100*time.Millisecond)
-        gtest.Assert(array.Len(), 1)
-    })
-}
-
-func TestWheel_DelayAdd_Once(t *testing.T) {
-    gtest.Case(func() {
-        wheel := gtimew.New()
-        array := garray.New(0, 0)
-        wheel.DelayAddOnce(1, 1, func() {
-            array.Append(1)
-        })
-        gtest.Assert(wheel.Size(), 0)
-        time.Sleep(1100*time.Millisecond)
-        gtest.Assert(wheel.Size(), 1)
-        gtest.Assert(array.Len(), 0)
-
-        time.Sleep(1100*time.Millisecond)
-        gtest.Assert(array.Len(), 1)
-
-        time.Sleep(1100*time.Millisecond)
-        gtest.Assert(array.Len(), 1)
-    })
-}
-
-func TestWheel_ExitJob(t *testing.T) {
-    gtest.Case(func() {
-        wheel := gtimew.New()
-        array := garray.New(0, 0)
-        wheel.Add(1, func() {
-            array.Append(1)
-            gtimew.ExitJob()
-        })
-        time.Sleep(1100*time.Millisecond)
-        gtest.Assert(array.Len(), 1)
-        gtest.Assert(wheel.Size(), 0)
-    })
-}
diff --git a/g/os/gtimew/gtimew_wheel.go b/g/os/gtimew/gtimew_wheel.go
deleted file mode 100644
index 62c55863c..000000000
--- a/g/os/gtimew/gtimew_wheel.go
+++ /dev/null
@@ -1,110 +0,0 @@
-// Copyright 2019 gf Author(https://gitee.com/johng/gf). All Rights Reserved.
-//
-// This Source Code Form is subject to the terms of the MIT License.
-// If a copy of the MIT was not distributed with this file,
-// You can obtain one at https://gitee.com/johng/gf.
-
-package gtimew
-
-import (
-    "container/list"
-    "gitee.com/johng/gf/g/container/garray"
-    "gitee.com/johng/gf/g/container/glist"
-    "gitee.com/johng/gf/g/container/gtype"
-    "time"
-)
-
-// 循环任务管理对象
-type Wheel struct {
-    status   *gtype.Int  // 循环任务状态(0: 未执行; 1: 运行中; -1:删除关闭)
-    entries  *glist.List // 所有的循环任务项
-}
-
-// 创建自定义的循环任务管理对象
-func New() *Wheel {
-    wheel := &Wheel {
-        status   : gtype.NewInt(STATUS_RUNNING),
-        entries  : glist.New(),
-    }
-    wheel.startLoop()
-    return wheel
-}
-
-// 添加循环任务
-func (w *Wheel) Add(interval int, job JobFunc) *Entry {
-    entry := newEntry(interval, job, MODE_NORMAL)
-    w.entries.PushBack(entry)
-    return entry
-}
-
-// 添加单例运行循环任务
-func (w *Wheel) AddSingleton(interval int, job JobFunc) *Entry {
-    entry := newEntry(interval, job, MODE_SINGLETON)
-    w.entries.PushBack(entry)
-    return entry
-}
-
-// 添加只运行一次的循环任务
-func (w *Wheel) AddOnce(interval int, job JobFunc) *Entry {
-    entry := newEntry(interval, job, MODE_ONCE)
-    w.entries.PushBack(entry)
-    return entry
-}
-
-// 延迟添加循环任务，delay参数单位为秒
-func (w *Wheel) DelayAdd(delay int, interval int, job JobFunc) {
-    go func() {
-        time.Sleep(time.Duration(delay)*time.Second)
-        w.Add(interval, job)
-    }()
-}
-
-// 延迟添加单例循环任务，delay参数单位为秒
-func (w *Wheel) DelayAddSingleton(delay int, interval int, job JobFunc) {
-    go func() {
-        time.Sleep(time.Duration(delay)*time.Second)
-        w.AddSingleton(interval, job)
-    }()
-}
-
-// 延迟添加只运行一次的循环任务，delay参数单位为秒
-func (w *Wheel) DelayAddOnce(delay int, interval int, job JobFunc) {
-    go func() {
-        time.Sleep(time.Duration(delay)*time.Second)
-        w.AddOnce(interval, job)
-    }()
-}
-
-// 当前时间轮已注册的任务数
-func (w *Wheel) Size() int {
-    return w.entries.Len()
-}
-
-// 关闭循环任务
-func (w *Wheel) Close() {
-    w.status.Set(STATUS_CLOSED)
-}
-
-// 获取所有已注册的循环任务项(按照注册时间从小到大进行排序)
-func (w *Wheel) Entries() []*Entry {
-   array := garray.NewSortedArray(w.entries.Len(), func(v1, v2 interface{}) int {
-       entry1 := v1.(*Entry)
-       entry2 := v2.(*Entry)
-       if entry1.Create > entry2.Create {
-           return 1
-       }
-       return -1
-   }, false)
-    w.entries.RLockFunc(func(l *list.List) {
-        for e := l.Front(); e != nil; e = e.Next() {
-            array.Add(e.Value.(*Entry))
-        }
-   })
-   entries := make([]*Entry, array.Len())
-   array.RLockFunc(func(array []interface{}) {
-       for k, v := range array {
-           entries[k] = v.(*Entry)
-       }
-   })
-   return entries
-}
diff --git a/g/os/gtimew/gtimew.go b/g/os/gwheel/gwheel.go
similarity index 60%
rename from g/os/gtimew/gtimew.go
rename to g/os/gwheel/gwheel.go
index 8cb147310..6c6ee19a8 100644
--- a/g/os/gtimew/gtimew.go
+++ b/g/os/gwheel/gwheel.go
@@ -4,56 +4,73 @@
 // If a copy of the MIT was not distributed with this file,
 // You can obtain one at https://gitee.com/johng/gf.
 
-// Package gtimew provides Time Wheel for interval jobs running management/时间轮.
-// 高效的时间轮任务执行管理，用于管理异步的间隔运行任务，或者异步只运行一次的任务(最小时间粒度为秒)。
+// Package gwheel provides Timing Wheel for interval jobs running and management/时间轮.
+// 高效的时间轮任务执行管理，用于管理异步的间隔运行任务，或者异步只运行一次的任务(默认最小时间粒度为秒)。
 // 与其他定时任务管理模块的区别是，时间轮模块只管理间隔执行任务，并且更注重执行效率(纳秒级别)。
-package gtimew
+package gwheel
+
+import "time"
 
 const (
     MODE_NORMAL    = 0
     MODE_SINGLETON = 1
     MODE_ONCE      = 2
+    MODE_TIMES     = 3
 
     STATUS_READY   = 0
     STATUS_RUNNING = 1
     STATUS_CLOSED  = -1
 
     gPANIC_EXIT    = "exit"
+
+    gDEFAULT_SLOT_NUMBER    = 10
+    gDEFAULT_WHEEL_INTERVAL = 100*time.Millisecond
 )
 
 var (
     // 默认的wheel管理对象
-    defaultWheel = New()
+    defaultWheel = NewDefault()
 )
 
 // 添加执行方法，可以给定名字，以便于后续执行删除
 func Add(interval int, job JobFunc) *Entry {
-    return defaultWheel.Add(interval, job)
+    return defaultWheel.Add(10*interval, job)
 }
 
 // 添加单例运行循环任务
 func AddSingleton(interval int, job JobFunc) *Entry {
-    return defaultWheel.AddSingleton(interval, job)
+    return nil
+    return defaultWheel.AddSingleton(10*interval, job)
 }
 
 // 添加只运行一次的循环任务
 func AddOnce(interval int, job JobFunc) *Entry {
-    return defaultWheel.AddOnce(interval, job)
+    return defaultWheel.AddOnce(10*interval, job)
+}
+
+// 添加运行指定次数的循环任务
+func AddTimes(interval int, times int, job JobFunc) *Entry {
+    return defaultWheel.AddTimes(10*interval, times, job)
 }
 
 // 延迟添加循环任务，delay参数单位为秒
 func DelayAdd(delay int, interval int, job JobFunc) {
-    defaultWheel.DelayAdd(delay, interval, job)
+    defaultWheel.DelayAdd(delay, 10*interval, job)
 }
 
 // 延迟添加单例循环任务，delay参数单位为秒
 func DelayAddSingleton(delay int, interval int, job JobFunc) {
-    defaultWheel.DelayAddSingleton(delay, interval, job)
+    defaultWheel.DelayAddSingleton(delay, 10*interval, job)
 }
 
 // 延迟添加只运行一次的循环任务，delay参数单位为秒
 func DelayAddOnce(delay int, interval int, job JobFunc) {
-    defaultWheel.DelayAddOnce(delay, interval, job)
+    defaultWheel.DelayAddOnce(delay, 10*interval, job)
+}
+
+// 延迟添加运行指定次数的循环任务，delay参数单位为秒
+func DelayAddTimes(delay int, interval int, times int, job JobFunc) {
+    defaultWheel.DelayAddTimes(delay, 10*interval, times, job)
 }
 
 // 获取所有已注册的循环任务项
diff --git a/g/os/gwheel/gwheel_entry.go b/g/os/gwheel/gwheel_entry.go
new file mode 100644
index 000000000..819c13674
--- /dev/null
+++ b/g/os/gwheel/gwheel_entry.go
@@ -0,0 +1,99 @@
+// Copyright 2019 gf Author(https://gitee.com/johng/gf). All Rights Reserved.
+//
+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file,
+// You can obtain one at https://gitee.com/johng/gf.
+
+package gwheel
+
+import (
+    "gitee.com/johng/gf/g/container/gtype"
+    "time"
+)
+
+// 循环任务项
+type Entry struct {
+    wheel     *Wheel        // 所属时间轮
+    mode      *gtype.Int    // 任务运行模式(0: normal; 1: singleton; 2: once; 3: times)
+    status    *gtype.Int    // 循环任务状态(0: ready;  1: running;  -1: stopped)
+    times     *gtype.Int    // 还需运行次数, 当mode=3时启用, 当times值为0时表示不再执行(自动该任务删除)
+    latest    time.Time     // 任务上一次的运行时间点
+    Job       JobFunc       // 注册循环任务方法
+    Create    time.Time     // 任务的创建时间点
+    Interval  time.Duration // 运行间隔
+}
+
+// 任务执行方法
+type JobFunc func()
+
+// 创建循环任务
+func (w *Wheel) newEntry(interval int, job JobFunc, mode int, times int) *Entry {
+    now     := time.Now()
+    pos     := (interval + w.index.Val()) % w.number
+    entry   := &Entry {
+        wheel    : w,
+        mode     : gtype.NewInt(mode),
+        status   : gtype.NewInt(),
+        times    : gtype.NewInt(times),
+        latest   : now,
+        Job      : job,
+        Create   : now,
+        Interval : w.interval*time.Duration(interval),
+    }
+    w.slots[pos].PushBack(entry)
+    return entry
+}
+
+// 获取任务运行模式
+func (entry *Entry) Mode() int {
+    return entry.mode.Val()
+}
+
+// 设置任务运行模式(0: normal; 1: singleton; 2: once)
+func (entry *Entry) SetMode(mode int) {
+    entry.mode.Set(mode)
+}
+
+// 循环任务状态
+func (entry *Entry) Status() int {
+    return entry.status.Val()
+}
+
+// 启动循环任务
+func (entry *Entry) Start() {
+    entry.status.Set(STATUS_READY)
+}
+
+// 停止循环任务
+func (entry *Entry) Stop() {
+    entry.status.Set(STATUS_CLOSED)
+}
+
+// 检测当前任务是否可运行, 内部将事件转换为微秒数来计算(int64), 精度更高
+func (entry *Entry) runnableCheck(t time.Time) bool {
+    if t.UnixNano() - entry.latest.UnixNano() >= entry.Interval.Nanoseconds() {
+        // 判断任务的运行模式
+        switch entry.mode.Val() {
+            // 是否只允许单例运行
+            case MODE_SINGLETON:
+                if  entry.status.Set(STATUS_RUNNING) == STATUS_RUNNING {
+                    return false
+                }
+            // 只运行一次的任务
+            case MODE_ONCE:
+                if  entry.status.Set(STATUS_CLOSED) == STATUS_CLOSED {
+                    return false
+                }
+            // 运行指定次数的任务
+            case MODE_TIMES:
+                if entry.times.Add(-1) <= 0 {
+                    if  entry.status.Set(STATUS_CLOSED) == STATUS_CLOSED {
+                        return false
+                    }
+                }
+        }
+        entry.latest = t
+        return true
+    }
+    return false
+}
diff --git a/g/os/gwheel/gwheel_jobloop.go b/g/os/gwheel/gwheel_jobloop.go
new file mode 100644
index 000000000..b75baa4b4
--- /dev/null
+++ b/g/os/gwheel/gwheel_jobloop.go
@@ -0,0 +1,66 @@
+// Copyright 2019 gf Author(https://gitee.com/johng/gf). All Rights Reserved.
+//
+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file,
+// You can obtain one at https://gitee.com/johng/gf.
+
+package gwheel
+
+import (
+    "gitee.com/johng/gf/g/container/glist"
+    "time"
+)
+
+// 延迟添加循环任务，delay参数单位为秒
+func (w *Wheel) startLoop() {
+    go func() {
+        for {
+            select {
+                case <- w.closed:
+                    return
+                case t := <- w.ticker.C:
+                    if w.status.Val() == STATUS_RUNNING {
+                        index := w.index.Val()
+                        go w.checkEntries(t, w.slots[index])
+                        w.index.Set((index + 1) % w.number)
+                    }
+            }
+        }
+    }()
+}
+
+// 遍历检查可执行循环任务，并异步执行
+func (w *Wheel) checkEntries(t time.Time, l *glist.List) {
+    for e := l.Front(); e != nil; e = e.Next() {
+        entry := e.Value().(*Entry)
+        // 是否已命令停止运行
+        if entry.status.Val() == STATUS_CLOSED {
+            continue
+        }
+        // 是否满足运行时间间隔
+        if !entry.runnableCheck(t) {
+            continue
+        }
+        // 执行异步运行
+        go func(e *glist.Element, l *glist.List) {
+            defer func() {
+                if err := recover(); err != nil {
+                    if err == gPANIC_EXIT {
+                        entry.status.Set(STATUS_CLOSED)
+                    } else {
+                        panic(err)
+                    }
+                }
+                if entry.status.Val() != STATUS_CLOSED {
+                    entry.status.Set(STATUS_READY)
+                } else {
+                    // 异步删除，不受锁机制的影响
+                    l.Remove(e)
+                }
+            }()
+
+            entry.Job()
+        }(e, l)
+
+    }
+}
\ No newline at end of file
diff --git a/g/os/gwheel/gwheel_wheel.go b/g/os/gwheel/gwheel_wheel.go
new file mode 100644
index 000000000..c1cd07351
--- /dev/null
+++ b/g/os/gwheel/gwheel_wheel.go
@@ -0,0 +1,124 @@
+// Copyright 2019 gf Author(https://gitee.com/johng/gf). All Rights Reserved.
+//
+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file,
+// You can obtain one at https://gitee.com/johng/gf.
+
+package gwheel
+
+import (
+    "gitee.com/johng/gf/g/container/glist"
+    "gitee.com/johng/gf/g/container/gtype"
+    "time"
+)
+
+// 循环任务管理对象
+type Wheel struct {
+    status    *gtype.Int      // 循环任务状态(0: 未执行; 1: 运行中; -1:删除关闭)
+    index     *gtype.Int      // 时间轮处理的当前索引位置
+    slots     []*glist.List   // 所有的循环任务项, 按照Slot Number进行分组
+    number    int             // Slot Number
+    closed    chan struct{}   // 停止事件
+    create    time.Time       // 创建时间
+    ticker    *time.Ticker    // 时间轮间隔
+    interval  time.Duration   // 时间间隔(slot时间长度)
+}
+
+// 创建使用默认值的时间轮
+func NewDefault() *Wheel {
+    return New(gDEFAULT_SLOT_NUMBER, gDEFAULT_WHEEL_INTERVAL)
+}
+
+// 创建自定义的循环任务管理对象
+func New(slot int, interval time.Duration) *Wheel {
+    w := &Wheel {
+        status    : gtype.NewInt(STATUS_RUNNING),
+        index     : gtype.NewInt(),
+        slots     : make([]*glist.List, slot),
+        number    : slot,
+        closed    : make(chan struct{}, 1),
+        create    : time.Now(),
+        ticker    : time.NewTicker(interval),
+        interval  : interval,
+    }
+    for i := 0; i < w.number; i++ {
+        w.slots[i] = glist.New()
+    }
+    w.startLoop()
+    return w
+}
+
+// 添加循环任务
+func (w *Wheel) Add(interval int, job JobFunc) *Entry {
+    return w.newEntry(interval, job, MODE_NORMAL, 0)
+}
+
+// 添加单例运行循环任务
+func (w *Wheel) AddSingleton(interval int, job JobFunc) *Entry {
+    return w.newEntry(interval, job, MODE_SINGLETON, 0)
+}
+
+// 添加只运行一次的循环任务
+func (w *Wheel) AddOnce(interval int, job JobFunc) *Entry {
+    return w.newEntry(interval, job, MODE_ONCE, 0)
+}
+
+// 添加运行指定次数的循环任务
+func (w *Wheel) AddTimes(interval int, times int, job JobFunc) *Entry {
+    return w.newEntry(interval, job, MODE_TIMES, times)
+}
+
+// 延迟添加循环任务，delay参数单位为时间轮刻度
+func (w *Wheel) DelayAdd(delay int, interval int, job JobFunc) {
+    w.AddOnce(delay, func() {
+        w.Add(interval, job)
+    })
+}
+
+// 延迟添加单例循环任务，delay参数单位为时间轮刻度
+func (w *Wheel) DelayAddSingleton(delay int, interval int, job JobFunc) {
+    w.AddOnce(delay, func() {
+        w.AddSingleton(interval, job)
+    })
+}
+
+// 延迟添加只运行一次的循环任务，delay参数单位为时间轮刻度
+func (w *Wheel) DelayAddOnce(delay int, interval int, job JobFunc) {
+    w.AddOnce(delay, func() {
+        w.AddOnce(interval, job)
+    })
+}
+
+// 延迟添加只运行一次的循环任务，delay参数单位为时间轮刻度
+func (w *Wheel) DelayAddTimes(delay int, interval int, times int, job JobFunc) {
+    w.AddOnce(delay, func() {
+        w.AddTimes(interval, times, job)
+    })
+}
+
+// 当前时间轮已注册的任务数
+func (w *Wheel) Size() int {
+    size := 0
+    for _, l := range w.slots {
+        size += l.Len()
+    }
+    return size
+}
+
+// 关闭循环任务
+func (w *Wheel) Close() {
+    w.status.Set(STATUS_CLOSED)
+    w.ticker.Stop()
+    w.closed <- struct{}{}
+}
+
+// 获取所有已注册的循环任务项(按照注册时间从小到大进行排序)
+func (w *Wheel) Entries() []*Entry {
+    entries := make([]*Entry, 0)
+    for _, l := range w.slots {
+        for e := l.Front(); e != nil; e = e.Next() {
+            entries = append(entries, e.Value().(*Entry))
+        }
+    }
+    return entries
+}
diff --git a/g/os/gtimew/gtimew_bench_test.go b/g/os/gwheel/gwheel_z_bench_test.go
similarity index 83%
rename from g/os/gtimew/gtimew_bench_test.go
rename to g/os/gwheel/gwheel_z_bench_test.go
index 27fefac60..9e495ae28 100644
--- a/g/os/gtimew/gtimew_bench_test.go
+++ b/g/os/gwheel/gwheel_z_bench_test.go
@@ -4,17 +4,17 @@
 // If a copy of the MIT was not distributed with this file,
 // You can obtain one at https://gitee.com/johng/gf.
 
-package gtimew_test
+package gwheel_test
 
 import (
-    "gitee.com/johng/gf/g/os/gtimew"
+    "gitee.com/johng/gf/g/os/gwheel"
     "testing"
 )
 
 func Benchmark_Add(b *testing.B) {
     for i := 0; i < b.N; i++ {
         // 基准测试的时候不能设置为1秒，否则大量的任务会崩掉系统
-        gtimew.Add(100000, func() {
+        gwheel.Add(100000, func() {
 
         })
     }
diff --git a/g/os/gwheel/gwheel_z_unit_1_test.go b/g/os/gwheel/gwheel_z_unit_1_test.go
new file mode 100644
index 000000000..6c6aef4b5
--- /dev/null
+++ b/g/os/gwheel/gwheel_z_unit_1_test.go
@@ -0,0 +1,150 @@
+// Copyright 2018 gf Author(https://gitee.com/johng/gf). All Rights Reserved.
+//
+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file,
+// You can obtain one at https://gitee.com/johng/gf.
+
+// 包方法操作
+
+package gwheel_test
+
+import (
+    "gitee.com/johng/gf/g/container/garray"
+    "gitee.com/johng/gf/g/os/gwheel"
+    "gitee.com/johng/gf/g/util/gtest"
+    "testing"
+    "time"
+)
+
+func TestWheel_Add_Close(t *testing.T) {
+    gtest.Case(func() {
+        wheel  := gwheel.NewDefault()
+        array  := garray.New(0, 0)
+        entry1 := wheel.Add(10, func() {
+            array.Append(1)
+        })
+        entry2 := wheel.Add(10, func() {
+            array.Append(1)
+        })
+        entry3 := wheel.Add(20, func() {
+            array.Append(1)
+        })
+        gtest.AssertNE(entry1, nil)
+        gtest.AssertNE(entry2, nil)
+        gtest.AssertNE(entry3, nil)
+        gtest.Assert(wheel.Size(), 3)
+        time.Sleep(1200*time.Millisecond)
+        gtest.Assert(array.Len(), 2)
+        time.Sleep(1200*time.Millisecond)
+        gtest.Assert(array.Len(), 5)
+        wheel.Close()
+        time.Sleep(1200*time.Millisecond)
+        fixedLength := array.Len()
+        time.Sleep(1200*time.Millisecond)
+        gtest.Assert(array.Len(), fixedLength)
+    })
+}
+
+func TestWheel_Singlton(t *testing.T) {
+   gtest.Case(func() {
+       wheel := gwheel.NewDefault()
+       array := garray.New(0, 0)
+       entry := wheel.AddSingleton(10, func() {
+           array.Append(1)
+           time.Sleep(10*time.Second)
+       })
+       gtest.AssertNE(entry, nil)
+       gtest.Assert(wheel.Size(), 1)
+       time.Sleep(1200*time.Millisecond)
+       gtest.Assert(array.Len(), 1)
+
+       time.Sleep(1200*time.Millisecond)
+       gtest.Assert(array.Len(), 1)
+   })
+}
+
+func TestWheel_Once(t *testing.T) {
+   gtest.Case(func() {
+       wheel  := gwheel.NewDefault()
+       array  := garray.New(0, 0)
+       entry1 := wheel.AddOnce(10, func() {
+           array.Append(1)
+       })
+       entry2 := wheel.AddOnce(10, func() {
+           array.Append(1)
+       })
+       gtest.AssertNE(entry1, nil)
+       gtest.AssertNE(entry2, nil)
+       time.Sleep(1200*time.Millisecond)
+       gtest.Assert(array.Len(), 2)
+       time.Sleep(1200*time.Millisecond)
+       gtest.Assert(array.Len(), 2)
+       wheel.Close()
+       time.Sleep(1200*time.Millisecond)
+       fixedLength := array.Len()
+       time.Sleep(1200*time.Millisecond)
+       gtest.Assert(array.Len(), fixedLength)
+   })
+}
+
+func TestWheel_DelayAdd(t *testing.T) {
+   gtest.Case(func() {
+       wheel := gwheel.NewDefault()
+       array := garray.New(0, 0)
+       wheel.DelayAdd(10, 10, func() {
+           array.Append(1)
+       })
+       time.Sleep(1200*time.Millisecond)
+       gtest.Assert(array.Len(), 0)
+       time.Sleep(1200*time.Millisecond)
+       gtest.Assert(array.Len(), 1)
+   })
+}
+
+func TestWheel_DelayAdd_Singleton(t *testing.T) {
+   gtest.Case(func() {
+       wheel := gwheel.NewDefault()
+       array := garray.New(0, 0)
+       wheel.DelayAddSingleton(10, 10, func() {
+           array.Append(1)
+           time.Sleep(10*time.Second)
+       })
+       time.Sleep(1100*time.Millisecond)
+       gtest.Assert(array.Len(), 0)
+
+       time.Sleep(1100*time.Millisecond)
+       gtest.Assert(array.Len(), 1)
+   })
+}
+
+func TestWheel_DelayAdd_Once(t *testing.T) {
+   gtest.Case(func() {
+       wheel := gwheel.NewDefault()
+       array := garray.New(0, 0)
+       wheel.DelayAddOnce(10, 10, func() {
+           array.Append(1)
+       })
+       time.Sleep(1100*time.Millisecond)
+       gtest.Assert(array.Len(), 0)
+
+       time.Sleep(1100*time.Millisecond)
+       gtest.Assert(array.Len(), 1)
+
+       time.Sleep(1100*time.Millisecond)
+       gtest.Assert(array.Len(), 1)
+   })
+}
+
+func TestWheel_ExitJob(t *testing.T) {
+   gtest.Case(func() {
+       wheel := gwheel.NewDefault()
+       array := garray.New(0, 0)
+       wheel.Add(10, func() {
+           array.Append(1)
+           gwheel.ExitJob()
+       })
+       time.Sleep(1200*time.Millisecond)
+       gtest.Assert(array.Len(), 1)
+       gtest.Assert(wheel.Size(), 0)
+   })
+}
diff --git a/g/os/gtimew/gtimew_unit_2_test.go b/g/os/gwheel/gwheel_z_unit_2_test.go
similarity index 65%
rename from g/os/gtimew/gtimew_unit_2_test.go
rename to g/os/gwheel/gwheel_z_unit_2_test.go
index 99bf32dab..fa9858bf6 100644
--- a/g/os/gtimew/gtimew_unit_2_test.go
+++ b/g/os/gwheel/gwheel_z_unit_2_test.go
@@ -6,63 +6,63 @@
 
 // Entry操作
 
-package gtimew_test
+package gwheel_test
 
 import (
     "gitee.com/johng/gf/g/container/garray"
-    "gitee.com/johng/gf/g/os/gtimew"
+    "gitee.com/johng/gf/g/os/gwheel"
     "gitee.com/johng/gf/g/util/gtest"
     "testing"
     "time"
 )
 
 func TestWheel_Entry_Operation(t *testing.T) {
-    wheel := gtimew.New()
+    wheel := gwheel.NewDefault()
     array := garray.New(0, 0)
-    entry := wheel.Add(1, func() {
+    entry := wheel.Add(10, func() {
         array.Append(1)
     })
     gtest.AssertNE(entry, nil)
     gtest.Assert(wheel.Size(), 1)
-    time.Sleep(1100*time.Millisecond)
+    time.Sleep(1200*time.Millisecond)
     gtest.Assert(array.Len(), 1)
     entry.Stop()
-    time.Sleep(1100*time.Millisecond)
+    time.Sleep(1200*time.Millisecond)
     gtest.Assert(array.Len(), 1)
     entry.Start()
-    time.Sleep(1100*time.Millisecond)
+    time.Sleep(1200*time.Millisecond)
     gtest.Assert(array.Len(), 2)
 }
 
-func TestWheel_Entry_Singlton(t *testing.T) {
-    wheel := gtimew.New()
+func TestWheel_Entry_Singleton(t *testing.T) {
+    wheel := gwheel.NewDefault()
     array := garray.New(0, 0)
-    entry := wheel.Add(1, func() {
+    entry := wheel.Add(10, func() {
         array.Append(1)
         time.Sleep(10*time.Second)
     })
-    entry.SetMode(gtimew.MODE_SINGLETON)
+    entry.SetMode(gwheel.MODE_SINGLETON)
 
     gtest.AssertNE(entry, nil)
     gtest.Assert(wheel.Size(), 1)
-    time.Sleep(1100*time.Millisecond)
+    time.Sleep(1200*time.Millisecond)
     gtest.Assert(array.Len(), 1)
 
-    time.Sleep(1100*time.Millisecond)
+    time.Sleep(1200*time.Millisecond)
     gtest.Assert(array.Len(), 1)
 }
 
 func TestWheel_Entry_Once(t *testing.T) {
-    wheel := gtimew.New()
+    wheel := gwheel.NewDefault()
     array := garray.New(0, 0)
-    entry := wheel.Add(1, func() {
+    entry := wheel.Add(10, func() {
         array.Append(1)
     })
-    entry.SetMode(gtimew.MODE_ONCE)
+    entry.SetMode(gwheel.MODE_ONCE)
 
     gtest.AssertNE(entry, nil)
     gtest.Assert(wheel.Size(), 1)
-    time.Sleep(1100*time.Millisecond)
+    time.Sleep(1200*time.Millisecond)
     gtest.Assert(array.Len(), 1)
     gtest.Assert(wheel.Size(), 0)
 }
diff --git a/g/os/gwheel/gwheel_z_unit_3_test.go b/g/os/gwheel/gwheel_z_unit_3_test.go
new file mode 100644
index 000000000..3c0e05d9c
--- /dev/null
+++ b/g/os/gwheel/gwheel_z_unit_3_test.go
@@ -0,0 +1,28 @@
+// Copyright 2018 gf Author(https://gitee.com/johng/gf). All Rights Reserved.
+//
+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file,
+// You can obtain one at https://gitee.com/johng/gf.
+
+// 指定次数运行测试
+
+package gwheel_test
+
+import (
+    "gitee.com/johng/gf/g/container/garray"
+    "gitee.com/johng/gf/g/os/gwheel"
+    "gitee.com/johng/gf/g/util/gtest"
+    "testing"
+    "time"
+)
+
+func TestWheel_Times(t *testing.T) {
+    wheel := gwheel.NewDefault()
+    array := garray.New(0, 0)
+    entry := wheel.AddTimes(10, 20, func() {
+        array.Append(1)
+    })
+    gtest.AssertNE(entry, nil)
+    time.Sleep(3500*time.Millisecond)
+    gtest.Assert(array.Len(), 2)
+}
diff --git a/geg/other/test.go b/geg/other/test.go
index ca62b666a..cfd115023 100644
--- a/geg/other/test.go
+++ b/geg/other/test.go
@@ -4,6 +4,6 @@ import "time"
 
 func main() {
     for {
-        time.Sleep(time.Second)
+        time.Sleep(10*time.Millisecond)
     }
 }