diff --git a/gear-lib/CMakeLists.txt b/gear-lib/CMakeLists.txt
index fea4d109..2a8b8190 100644
--- a/gear-lib/CMakeLists.txt
+++ b/gear-lib/CMakeLists.txt
@@ -48,23 +48,12 @@ ADD_SUBDIRECTORY(libbitmap)
 ADD_SUBDIRECTORY(libdict)
 ADD_SUBDIRECTORY(libfile)
 ADD_SUBDIRECTORY(libhash)
-
-
-IF (NOT DEFINED ENV_MINGW)
 ADD_SUBDIRECTORY(libdarray)
 ADD_SUBDIRECTORY(libthread)
 ADD_SUBDIRECTORY(libsock)
 ADD_SUBDIRECTORY(libgevent)
-ENDIF ()
-
-IF (NOT DEFINED OS_WINDOWS)
 ADD_SUBDIRECTORY(libqueue)
-ADD_SUBDIRECTORY(libthread)
-ADD_SUBDIRECTORY(libgevent)
 ADD_SUBDIRECTORY(libdebug)
-ADD_SUBDIRECTORY(libhash)
-ADD_SUBDIRECTORY(libdarray)
-ADD_SUBDIRECTORY(libqueue)
 ADD_SUBDIRECTORY(libtime)
 ADD_SUBDIRECTORY(liblog)
 ADD_SUBDIRECTORY(libmedia-io)
@@ -79,6 +68,12 @@ ADD_SUBDIRECTORY(libworkq)
 ADD_SUBDIRECTORY(libhal)
 ADD_SUBDIRECTORY(librpc)
 ADD_SUBDIRECTORY(libmp4)
+
+IF (NOT DEFINED ENV_MINGW)
+ENDIF ()
+
+IF (NOT DEFINED OS_WINDOWS)
+
 ENDIF ()
 
 #libcollections
diff --git a/gear-lib/libvector/libvector.c b/gear-lib/libvector/libvector.c
index 483eb54d..af5f9249 100644
--- a/gear-lib/libvector/libvector.c
+++ b/gear-lib/libvector/libvector.c
@@ -73,7 +73,6 @@ int vector_empty(struct vector *v)
         printf("%s: paraments invalid!\n", __func__);
         return -1;
     }
-    v->tmp_cursor = 0;
     return (v->size == 0);
 }
 
@@ -104,28 +103,30 @@ vector_iter vector_last(struct vector *v)
     return (void *)((uint8_t *)v->buf.iov_base + (v->size-1) * v->type_size);
 }
 
-vector_iter vector_next(struct vector *v)
+vector_iter vector_next(struct vector *v, vector_iter iter)
 {
-    if (!v) {
+    if (!v || !iter) {
         printf("%s: paraments invalid!\n", __func__);
         return NULL;
     }
-    if (v->tmp_cursor < v->size) {
-        v->tmp_cursor++;
-    } else {
-        return NULL;
+    if (iter == vector_end(v)) {
+        printf("%s: vector reach the end!\n", __func__);
+        return iter;
     }
-    return (void *)((uint8_t *)v->buf.iov_base + v->tmp_cursor * v->type_size);
+    return (void *)((uint8_t *)iter + v->type_size);
 }
 
-vector_iter vector_prev(struct vector *v)
+vector_iter vector_prev(struct vector *v, vector_iter iter)
 {
-    if (!v) {
+    if (!v || !iter) {
         printf("%s: paraments invalid!\n", __func__);
         return NULL;
     }
-    v->tmp_cursor--;
-    return (void *)((uint8_t *)v->buf.iov_base + v->tmp_cursor * v->type_size);
+    if (iter == vector_begin(v)) {
+        printf("%s: vector reach the begin!\n", __func__);
+        return iter;
+    }
+    return (void *)((uint8_t *)iter - v->type_size);
 }
 
 void *_vector_iter_value(struct vector *v, vector_iter iter)
@@ -134,7 +135,11 @@ void *_vector_iter_value(struct vector *v, vector_iter iter)
         printf("%s: paraments invalid!\n", __func__);
         return NULL;
     }
-    return (void *)((uint8_t *)v->buf.iov_base + v->tmp_cursor * v->type_size);
+    if (iter > vector_end(v) || iter < vector_begin(v)) {
+        printf("%s: iter out of range!\n", __func__);
+        return NULL;
+    }
+    return (void *)((uint8_t *)iter);
 }
 
 void *_vector_at(struct vector *v, int pos)
@@ -154,7 +159,6 @@ struct vector *_vector_create(size_t size)
         return NULL;
     }
     v->size = 0;
-    v->tmp_cursor = 0;
     v->type_size = size;
     v->max_size = (size_t)(-1/size);
     v->capacity = VECTOR_DEFAULT_BUF_LEN;
diff --git a/gear-lib/libvector/libvector.h b/gear-lib/libvector/libvector.h
index 44f21092..03816378 100644
--- a/gear-lib/libvector/libvector.h
+++ b/gear-lib/libvector/libvector.h
@@ -39,7 +39,6 @@ typedef struct vector {
     size_t max_size; //max number of element
     size_t capacity; //size of allocated storage capacity
     size_t type_size;
-    size_t tmp_cursor;
     struct iovec buf;
     vector_iter iterator;
 } vector_t;
@@ -69,8 +68,8 @@ void _vector_push_back(struct vector *v, void *e, size_t type_size);
 vector_iter vector_begin(struct vector *v);
 vector_iter vector_end(struct vector *v);
 vector_iter vector_last(struct vector *v);//last=end-1
-vector_iter vector_next(struct vector *v);
-vector_iter vector_prev(struct vector *v);
+vector_iter vector_next(struct vector *v, vector_iter iter);
+vector_iter vector_prev(struct vector *v, vector_iter iter);
 void *_vector_iter_value(struct vector *v, vector_iter iter);
 void *_vector_at(struct vector *v, int pos);
 
diff --git a/gear-lib/libvector/test_libvector.c b/gear-lib/libvector/test_libvector.c
index d23ca834..02bfb389 100644
--- a/gear-lib/libvector/test_libvector.c
+++ b/gear-lib/libvector/test_libvector.c
@@ -45,7 +45,7 @@ void mix_struct()
     c = _vector_create(sizeof(struct tmp_box));
 #endif
     vector_push_back(c, tb);
-    for (iter = vector_begin(c); iter != vector_end(c); iter = vector_next(c)) {
+    for (iter = vector_begin(c); iter != vector_end(c); iter = vector_next(c, iter)) {
         struct tmp_box *tt = vector_iter_valuep(c, iter, struct tmp_box);
         printf("vector member.c: %c\n", tt->c);
         printf("vector member.i: %d\n", tt->i);
@@ -79,7 +79,7 @@ void default_struct()
     vector_push_back(a, t1);
     vector_push_back(a, t2);
     vector_push_back(a, t3);
-    for (iter = vector_begin(a); iter != vector_end(a); iter = vector_next(a)) {
+    for (iter = vector_begin(a); iter != vector_end(a); iter = vector_next(a, iter)) {
         printf("vector member: %d\n", *vector_iter_valuep(a, iter, int));
     }
     for (i = 0; i < a->size; i++) {