diff --git a/AppKit/fixed_rbtree_pool.c b/AppKit/fixed_rbtree_pool.c
index 3450136..04beb9a 100644
--- a/AppKit/fixed_rbtree_pool.c
+++ b/AppKit/fixed_rbtree_pool.c
@@ -1,5 +1,6 @@
 #include <fixed_rbtree_pool.h>
 #include "os_macros.h"
+
 /* ------------------------------------------------------------------------------------------------------------------ */
 /*  */
 
@@ -28,7 +29,7 @@ void node_init(rbtree_t* tree, rbtree_node_t* self, os_size_t obj_size, void* bl
 
 static
 int node_cmp(const os_size_t obj_size, const rbtree_node_t* x, void* args){
-    return (obj_size == x->pool.obj_size)?0:((obj_size > x->pool.obj_size)?1:-1);
+    return OS_COMPARE(obj_size, x->pool.obj_size);
 }
 
 /* ------------------------------------------------------------------------------------------------------------------ */
@@ -427,32 +428,35 @@ void fixed_rbtree_pool_init(fixed_rbtree_pool_t* self, void* node_block, os_size
     pool_add_block(&self->node_pool, node_block, node_block_size);
 }
 
-void fixed_rbtree_pool_add_node_pool(fixed_rbtree_pool_t* self, void* node_block, os_size_t node_block_size){
-    pool_add_block(&self->node_pool, node_block, node_block_size);
+os_bool_t fixed_rbtree_pool_add_node_pool(fixed_rbtree_pool_t* self, void* node_block, os_size_t node_block_size){
+    return pool_add_block(&self->node_pool, node_block, node_block_size);
 }
 
 void fixed_rbtree_pool_destroy(fixed_rbtree_pool_t* self){
     while(self->root){
         rbtree_node_t * p = self->root;
+        pool_destroy(&p->pool);
         node_remove(self, p);
         node_destroy(self, p);
     }
+    pool_destroy(&self->node_pool);
 }
 
-void fixed_rbtree_pool_add(fixed_rbtree_pool_t* self, os_size_t obj_size, void* block, os_size_t block_size){
+os_bool_t fixed_rbtree_pool_add(fixed_rbtree_pool_t* self, os_size_t obj_size, void* block, os_size_t block_size){
     rbtree_node_t* x = find(self, obj_size, self->root);
     if(x==NULL){
         x = pool_alloc(&self->node_pool);
+        if(!x) return OS_FALSE;
         node_init(self, x, obj_size, block, block_size);
         node_insert(self, x);
     }else{
         pool_add_block(&x->pool, block, block_size);
     }
+    return OS_TRUE;
 }
 
 void* fixed_rbtree_pool_alloc(fixed_rbtree_pool_t* self, os_size_t obj_size){
     rbtree_node_t * x = find(self, obj_size, self->root);
-    OS_ASSERT(x, "No pool exist for obj_size: %"OS_PRIu, obj_size);
     if(x==NULL){
         return NULL;
     }
@@ -462,10 +466,9 @@ void* fixed_rbtree_pool_alloc(fixed_rbtree_pool_t* self, os_size_t obj_size){
 void fixed_rbtree_pool_free(fixed_rbtree_pool_t* self, os_size_t obj_size, void* ptr){
     if(!ptr) return;
     rbtree_node_t * x = find(self, obj_size, self->root);
-    OS_ASSERT(x, "No pool exist for obj_size: %"OS_PRIu, obj_size);
     if(x==NULL){
         return;
     }
-    pool_free(&self->node_pool, ptr);
+    pool_free(&x->pool, ptr);
 }
 
diff --git a/AppKit/fixed_rbtree_pool.h b/AppKit/fixed_rbtree_pool.h
index 131237d..1868149 100644
--- a/AppKit/fixed_rbtree_pool.h
+++ b/AppKit/fixed_rbtree_pool.h
@@ -33,10 +33,10 @@ typedef struct {
 /*  */
 
 void fixed_rbtree_pool_init(fixed_rbtree_pool_t* self, void* node_block, os_size_t node_block_size);
-void fixed_rbtree_pool_add_node_pool(fixed_rbtree_pool_t* self, void* node_block, os_size_t node_block_size);
+os_bool_t fixed_rbtree_pool_add_node_pool(fixed_rbtree_pool_t* self, void* node_block, os_size_t node_block_size);
 void fixed_rbtree_pool_destroy(fixed_rbtree_pool_t* self);
 
-void fixed_rbtree_pool_add(fixed_rbtree_pool_t* self, os_size_t obj_size, void* block, os_size_t block_size);
+os_bool_t fixed_rbtree_pool_add(fixed_rbtree_pool_t* self, os_size_t obj_size, void* block, os_size_t block_size);
 void* fixed_rbtree_pool_alloc(fixed_rbtree_pool_t* self, os_size_t obj_size);
 void fixed_rbtree_pool_free(fixed_rbtree_pool_t* self, os_size_t obj_size, void* ptr);
 
diff --git a/AppKit/pool.c b/AppKit/pool.c
index b79b1ca..f1fb470 100644
--- a/AppKit/pool.c
+++ b/AppKit/pool.c
@@ -2,13 +2,15 @@
 #include "os_macros.h"
 #include "os_align.h"
 
-void pool_add_block(pool_t* self, void* block, os_size_t block_size){
+os_bool_t pool_add_block(pool_t* self, void* block, os_size_t block_size){
     // 对齐
     os_uintptr_t init_start = (os_uintptr_t)block;                  // 初始的位置
     os_uintptr_t start = OS_ALIGN_UP(init_start, OS_ALIGN_SIZE);    // 向上对齐后的位置
     block_size -= (start - init_start);                             // 实际使用的块大小
 
-    OS_ASSERT(block_size > self->obj_size);
+    if(block_size < self->obj_size){
+        return OS_FALSE;
+    }
 
     // 将内存块拆成 obj_size 大小
     os_size_t count = block_size/self->obj_size;
@@ -19,5 +21,7 @@ void pool_add_block(pool_t* self, void* block, os_size_t block_size){
     ((pool_link_t*)last)->next = 0;
     self->free_list_p = (pool_link_t*)start;
     self->capacity += count;
+
+    return OS_TRUE;
 }
 
diff --git a/AppKit/pool.h b/AppKit/pool.h
index 547d710..e253722 100644
--- a/AppKit/pool.h
+++ b/AppKit/pool.h
@@ -30,7 +30,7 @@ typedef struct {
 /* ------------------------------------------------------------------------------------------------------------------ */
 /*  */
 
-void pool_add_block(pool_t* self, void* block, os_size_t block_size);
+os_bool_t pool_add_block(pool_t* self, void* block, os_size_t block_size);
 
 /*
  * pool_t pool;
@@ -57,6 +57,14 @@ void pool_init(pool_t* self, os_size_t obj_size){
     self->capacity = 0;
 }
 
+OS_STATIC_FORCE_INLINE
+void pool_destroy(pool_t* self){
+    self->free_list_p = 0;
+    self->obj_size = 0;
+    self->count = 0;
+    self->capacity = 0;
+}
+
 OS_STATIC_FORCE_INLINE
 void* pool_alloc(pool_t* self){
     if(!self->free_list_p){