diff --git a/README.md b/README.md
index b81490b..d1d161d 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ A pauseless garbage collector in C.
 ## 为什么要用C做？
 C是一门非常优秀的语言，它的语法简单，编译速度快，运行速度快，内存管理简单。
 
-## 基本操作接口（v0.0.0dev2）
+## 基本操作接口（v0.0.0dev2, v0.0.0dev3的自己估计看看就懂了吧）
 
 ### 1. 垃圾回收器的初始化
 void uboa_init(int nGCWorkers, size_t xmx, long timerInterval_min, bool enableRuleProactive, const char* logFilePath);
diff --git a/demo/test.c b/demo/test.c
index 12ab589..ecaee23 100644
--- a/demo/test.c
+++ b/demo/test.c
@@ -5,7 +5,7 @@
 
 #include <unistd.h>
 
-AppThrdHandle statics = NULL;
+uboa_appThrdHandle statics = NULL;
 uboa_reference oop = NULL;
 
 const size_t length = 15;
@@ -13,7 +13,7 @@ const off_t numOff = sizeof(off_t) * length;
 off_t* map = NULL;
 
 void foo(long num) {
-    AppThrdHandle hdl = uboa_createAppThrdHandle(alloca(1024));
+    uboa_appThrdHandle hdl = uboa_createAppThrdHandle(alloca(1024));
     uboa_reference ref[length];
     for(int i = 0; i < length; ++i) 
         ref[i] = uboa_pushReference(hdl);
@@ -27,21 +27,20 @@ void foo(long num) {
             else
                 uboa_new(hdl, ref[i], 1l << 24, oop);
 
-            uboa_store(ref[i], numOff, 114514);
+            uboa_storeInt32(ref[i], numOff, 114514);
         }
     )
-
     
     for(int a = 0; a < 1008600; ++a) {
         uboa_safeRegion(
             for(int i = 0; i < length; ++i) {
-                assert(114514 == uboa_load(ref[i], numOff));
+                assert(114514 == uboa_loadInt32(ref[i], numOff));
 
                 for(int j = 0; j < length; ++j) {
                     uboa_reference tmp = uboa_pushReference(hdl);
 
                     uboa_new(hdl, tmp, 128, uboa_null());
-                    uboa_store(tmp, numOff, 114514);
+                    uboa_storeInt32(tmp, numOff, 114514);
 
                     uboa_popReferences(hdl, 1);
                 }
@@ -52,7 +51,7 @@ void foo(long num) {
     uboa_safeRegion(
         for(int i = 0; i < length; ++i) {
             uboa_loadReference(ref[i], ref[i], map[i]);
-            assert(114514 == uboa_load(ref[i], numOff));
+            assert(114514 == uboa_loadInt32(ref[i], numOff));
         }
     )
 
diff --git a/makefile b/makefile
index 651b778..05ba52a 100644
--- a/makefile
+++ b/makefile
@@ -4,7 +4,7 @@ out = build/lib/libuboa.a
 
 macro = \
 	-DBUILD_DATE="\"12/17/2022, Saturday\"" \
-	-DGC_VERSION="\"0.0.0.dev2\"" \
+	-DGC_VERSION="\"0.0.0.dev3\"" \
 	-DCOPYRIGHT="\"Copyright\(c\) 2022, Lizbing. All rights reserved.\"" \
 	-DGC_PRODUCT_NAME="\"Uboa Garbage Collector\"" \
 	-DFEEDBACK_EMAIL="\"feedback@relight.team\""
diff --git a/src/share/allocator.c b/src/share/allocator.c
index f41b8e9..6176928 100644
--- a/src/share/allocator.c
+++ b/src/share/allocator.c
@@ -38,7 +38,7 @@ infile_inline(size_t align(size_t s, int alignment)) {
     return s - n + alignment;
 }
 
-infile_inline(void* edenAllocSmall(AppThrdHandle hdl, size_t s, Page** src)) {
+infile_inline(void* edenAllocSmall(uboa_appThrdHandle hdl, size_t s, Page** src)) {
     Page* p = hdl->TLAB;
 
     void* ret = Page_alloc(p, s);
@@ -118,7 +118,7 @@ inline void* memAlloc(size_t s) {
     return survAllocSmall(align(s, alignmentSmall), NULL);
 }
 
-void uboa_new(AppThrdHandle hdl, uboa_reference r, size_t s, uboa_reference oopRef) {
+void uboa_new(uboa_appThrdHandle hdl, uboa_reference r, size_t s, uboa_reference oopRef) {
     uboa_newArray(hdl, r, s, 1, oopRef);
 }
 
@@ -129,7 +129,7 @@ inline void Object_init(Object* this, Page* p) {
         LargeObject_push(this);
 }
 
-void uboa_newArray(AppThrdHandle hdl, uboa_reference r, size_t s, size_t count, uboa_reference oopRef) {
+void uboa_newArray(uboa_appThrdHandle hdl, uboa_reference r, size_t s, size_t count, uboa_reference oopRef) {
     Object* ptr = NULL;
     Page* src = NULL;
 
diff --git a/src/share/appThrd.c b/src/share/appThrd.c
index ca18c6f..4975ef1 100644
--- a/src/share/appThrd.c
+++ b/src/share/appThrd.c
@@ -1,7 +1,5 @@
 #include "appThrd.h"
-#include "barrier.h"
 
-static const intptr_t null = 0;
 static atomic_flag sl = ATOMIC_FLAG_INIT;
 static AppThrd* head = NULL;
 
@@ -34,7 +32,7 @@ void forEachRoot(void(*func)(AppThrd*)) {
     }
 }
 
-AppThrdHandle uboa_createAppThrdHandle(void* stack) {
+uboa_appThrdHandle uboa_createAppThrdHandle(void* stack) {
     AppThrd* at = stack;
     memset(at, 0, sizeof(AppThrd));
 
@@ -51,7 +49,7 @@ AppThrdHandle uboa_createAppThrdHandle(void* stack) {
     return at;
 }
 
-void uboa_destroyAppThrdHandle(AppThrdHandle hdl) {
+void uboa_destroyAppThrdHandle(uboa_appThrdHandle hdl) {
     while(atomic_flag_test_and_set(&sl));
 
     AppThrd* prev = hdl->prev, *next = hdl->next;
@@ -68,40 +66,12 @@ void uboa_destroyAppThrdHandle(AppThrdHandle hdl) {
     while(atomic_flag_test_and_set(&hdl->flag));
 }
 
-uboa_reference uboa_null() {
-    return &null;
-}
-
-uboa_reference uboa_pushReference(AppThrdHandle hdl) {
+uboa_reference uboa_pushReference(uboa_appThrdHandle hdl) {
     uboa_reference ref = hdl->stack + hdl->size++;
     *ref = NULL;
     return ref;
 }
 
-void uboa_popReferences(AppThrdHandle hdl, size_t n) {
+void uboa_popReferences(uboa_appThrdHandle hdl, size_t n) {
     hdl->size -= n;
-}
-
-void uboa_assign(uboa_reference dst, uboa_reference src) {
-    *dst = loadValueBarrier(src);
-}
-
-bool uboa_isNull(uboa_reference r) {
-    return !*r;
-}
-
-intptr_t uboa_load(uboa_reference r, off_t off) {
-    return *(intptr_t*)(((Object*)loadValueBarrier(r))->data + off);
-}
-
-void uboa_store(uboa_reference r, off_t off, intptr_t v) {
-    *(intptr_t*)(((Object*)loadValueBarrier(r))->data + off) = v;
-}
-
-void uboa_loadReference(uboa_reference dst, uboa_reference src, off_t off) {
-    uboa_assign(dst, ((Object*)loadValueBarrier(src))->data + off);
-}
-
-void uboa_storeReference(uboa_reference dst, off_t off, uboa_reference src) {
-    *(uboa_reference)(((Object*)loadValueBarrier(dst))->data + off) = *src;
-}
+}
\ No newline at end of file
diff --git a/src/share/appThrd.h b/src/share/appThrd.h
index 546c3ba..490ea21 100644
--- a/src/share/appThrd.h
+++ b/src/share/appThrd.h
@@ -6,7 +6,7 @@
 
 #include "../os/thread.h"
 
-typedef struct AppThrd AppThrd, *AppThrdHandle;
+typedef struct AppThrd AppThrd, *uboa_appThrdHandle;
 struct AppThrd {
     Page* TLAB;
 
diff --git a/src/share/oop.c b/src/share/oop.c
index f41c5fd..0f4389e 100644
--- a/src/share/oop.c
+++ b/src/share/oop.c
@@ -1,7 +1,7 @@
 #include "oop.h"
 #include "object.h"
 
-void uboa_new_Oop(AppThrdHandle hdl, uboa_reference r, size_t s, off_t* m) {
+void uboa_new_Oop(uboa_appThrdHandle hdl, uboa_reference r, size_t s, off_t* m) {
     size_t size = sizeof(off_t) * s;
     uboa_new(hdl, r, sizeof(OopDec) + size, uboa_null());
     
diff --git a/src/share/operate.c b/src/share/operate.c
new file mode 100644
index 0000000..379d3d3
--- /dev/null
+++ b/src/share/operate.c
@@ -0,0 +1,95 @@
+#include "barrier.h"
+
+static const intptr_t null = 0;
+
+uboa_reference uboa_null() {
+    return &null;
+}
+
+void uboa_assign(uboa_reference dst, uboa_reference src) {
+    *dst = loadValueBarrier(src);
+}
+
+bool uboa_isNull(uboa_reference r) {
+    return !*r;
+}
+
+void uboa_loadReference(uboa_reference dst, uboa_reference src, off_t off) {
+    uboa_assign(dst, ((Object*)loadValueBarrier(src))->data + off);
+}
+
+void uboa_storeReference(uboa_reference dst, off_t off, uboa_reference src) {
+    *(uboa_reference)(((Object*)loadValueBarrier(dst))->data + off) = *src;
+}
+
+int8_t uboa_loadInt8(uboa_reference r, off_t off) {
+    return *(int8_t*)(((Object*)loadValueBarrier(r))->data + off);
+}
+
+int16_t uboa_loadInt16(uboa_reference r, off_t off) {
+    return *(int16_t*)(((Object*)loadValueBarrier(r))->data + off);
+}
+
+int32_t uboa_loadInt32(uboa_reference r, off_t off) {
+    return *(int32_t*)(((Object*)loadValueBarrier(r))->data + off);
+}
+
+int64_t uboa_loadInt64(uboa_reference r, off_t off) {
+    return *(int64_t*)(((Object*)loadValueBarrier(r))->data + off);
+}
+
+float uboa_loadFloat(uboa_reference r, off_t off) {
+    return *(float*)(((Object*)loadValueBarrier(r))->data + off);
+}
+
+double uboa_loadDouble(uboa_reference r, off_t off) {
+    return *(double*)(((Object*)loadValueBarrier(r))->data + off);
+}
+
+void uboa_load(void* dst, uboa_reference src, off_t off, size_t n) {
+    memcpy(dst, ((Object*)loadValueBarrier(src))->data + off, n);
+}
+
+void uboa_storeInt8(uboa_reference r, off_t off, int8_t v) {
+    *(int8_t*)(((Object*)loadValueBarrier(r))->data + off) = v;
+}
+
+void uboa_storeInt16(uboa_reference r, off_t off, int16_t v) {
+    *(int16_t*)(((Object*)loadValueBarrier(r))->data + off) = v;
+}
+
+void uboa_storeInt32(uboa_reference r, off_t off, int32_t v) {
+    *(int32_t*)(((Object*)loadValueBarrier(r))->data + off) = v;
+}
+
+void uboa_storeInt64(uboa_reference r, off_t off, int64_t v) {
+    *(int64_t*)(((Object*)loadValueBarrier(r))->data + off) = v;
+}
+
+void uboa_storeFloat(uboa_reference r, off_t off, float v) {
+    *(float*)(((Object*)loadValueBarrier(r))->data + off) = v;
+}
+
+void uboa_storeDouble(uboa_reference r, off_t off, double v) {
+    *(double*)(((Object*)loadValueBarrier(r))->data + off) = v;
+}
+
+void uboa_store(uboa_reference dst, off_t off, void* src, size_t n) {
+    memcpy(((Object*)loadValueBarrier(dst))->data + off, src, n);
+}
+
+void uboa_memset(uboa_reference r, off_t off, int8_t c, size_t n) {
+    memset(((Object*)loadValueBarrier(r))->data + off, c, n);
+}
+
+void uboa_memcpy(uboa_reference dst, off_t dstOff, uboa_reference src, off_t srcOff, size_t n) {
+    memcpy(((Object*)loadValueBarrier(dst))->data + dstOff, ((Object*)loadValueBarrier(src))->data + srcOff, n);
+}
+
+void uboa_memmove(uboa_reference dst, off_t dstOff, uboa_reference src, off_t srcOff, size_t n) {
+    memmove(((Object*)loadValueBarrier(dst))->data + dstOff, ((Object*)loadValueBarrier(src))->data + srcOff, n);
+}
+
+int uboa_memcmp(uboa_reference r1, off_t off1, uboa_reference r2, off_t off2, size_t n) {
+    return memcmp(((Object*)loadValueBarrier(r1))->data + off1, ((Object*)loadValueBarrier(r2))->data + off2, n);
+}
\ No newline at end of file
diff --git a/src/share/stdafx.h b/src/share/stdafx.h
index 7401730..6c4cec7 100644
--- a/src/share/stdafx.h
+++ b/src/share/stdafx.h
@@ -1,7 +1,7 @@
 #ifndef UBOA_GC_STDAFX_
 #define UBOA_GC_STDAFX_
 
-typedef struct AppThrd AppThrd, *AppThrdHandle;
+typedef struct AppThrd AppThrd, *uboa_appThrdHandle;
 
 #define UBOA_GC_SOURCE_
 #include "../uboa.h"
diff --git a/src/uboa.h b/src/uboa.h
index afd71e7..4244c82 100644
--- a/src/uboa.h
+++ b/src/uboa.h
@@ -7,7 +7,7 @@
 #include <stdio.h>
 
 #ifndef UBOA_GC_SOURCE_
-typedef void* AppThrdHandle;
+typedef void* uboa_appThrdHandle;
 #endif
 
 typedef long off_t;
@@ -20,6 +20,12 @@ const char* uboa_version();
 
 void uboa_init(int nGCWorkers, size_t xmx, long timerInterval_min, bool enableRuleProactive, const char* logFilePath);
 
+uboa_appThrdHandle uboa_createAppThrdHandle(void* stack);
+void uboa_destroyAppThrdHandle(uboa_appThrdHandle);
+
+uboa_reference uboa_pushReference(uboa_appThrdHandle);
+void uboa_popReferences(uboa_appThrdHandle, size_t);
+
 // following APIs should be used in safe region
 void uboa_enterSafeRegion();
 void uboa_exitSafeRegion();
@@ -30,23 +36,35 @@ void uboa_exitSafeRegion();
 
 void uboa_gc(const char* reason);
 
-AppThrdHandle uboa_createAppThrdHandle(void* stack);
-void uboa_destroyAppThrdHandle(AppThrdHandle);
-
-uboa_reference uboa_pushReference(AppThrdHandle);
-void uboa_popReferences(AppThrdHandle, size_t);
-
-void uboa_new_Oop(AppThrdHandle, uboa_reference, size_t, off_t*);
-void uboa_new(AppThrdHandle, uboa_reference, size_t, uboa_reference oopRef);
-void uboa_newArray(AppThrdHandle, uboa_reference, size_t, size_t count, uboa_reference oopRef);
+void uboa_new_Oop(uboa_appThrdHandle, uboa_reference, size_t, off_t*);
+void uboa_new(uboa_appThrdHandle, uboa_reference, size_t, uboa_reference oopRef);
+void uboa_newArray(uboa_appThrdHandle, uboa_reference, size_t, size_t count, uboa_reference oopRef);
 
 uboa_reference uboa_null();
 void uboa_assign(uboa_reference dst, uboa_reference src);
 bool uboa_isNull(uboa_reference);
 
-intptr_t uboa_load(uboa_reference, off_t);
-void uboa_store(uboa_reference, off_t, intptr_t);
+int8_t uboa_loadInt8(uboa_reference, off_t);
+int16_t uboa_loadInt16(uboa_reference, off_t);
+int32_t uboa_loadInt32(uboa_reference, off_t);
+int64_t uboa_loadInt64(uboa_reference, off_t);
+float uboa_loadFloat(uboa_reference, off_t);
+double uboa_loadDouble(uboa_reference, off_t);
 void uboa_loadReference(uboa_reference dst, uboa_reference src, off_t);
+void uboa_load(void*, uboa_reference, off_t, size_t);
+
+void uboa_storeInt8(uboa_reference, off_t, int8_t);
+void uboa_storeInt16(uboa_reference, off_t, int16_t);
+void uboa_storeInt32(uboa_reference, off_t, int32_t);
+void uboa_storeInt64(uboa_reference, off_t, int64_t);
+void uboa_storeFloat(uboa_reference, off_t, float);
+void uboa_storeDouble(uboa_reference, off_t, double);
 void uboa_storeReference(uboa_reference dst, off_t, uboa_reference src);
+void uboa_store(uboa_reference, off_t, void*, size_t);
+
+void uboa_memset(uboa_reference, off_t, int8_t, size_t);
+void uboa_memcpy(uboa_reference dst, off_t dstOff, uboa_reference src, off_t srcOff, size_t);
+void uboa_memmove(uboa_reference dst, off_t dstOff, uboa_reference src, off_t srcOff, size_t);
+int uboa_memcmp(uboa_reference r1, off_t off1, uboa_reference r2, off_t off2, size_t);
 
 #endif
\ No newline at end of file