diff --git a/test/utils/SharedData/src/SharedDataTest.cpp b/test/utils/SharedData/src/SharedDataTest.cpp
index 47bd0af..58df1d9 100644
--- a/test/utils/SharedData/src/SharedDataTest.cpp
+++ b/test/utils/SharedData/src/SharedDataTest.cpp
@@ -49,6 +49,7 @@ namespace SharedDataTest
     // ../output_files/test/bin/SharedDataTest --gtest_filter=SharedDataTest.Demo2
     TEST(SharedDataTest, Demo2)
     {
+        constexpr int WRITABLE_DATA = 189;
         CreateLogModule();
         ILogInit(LOG_INSTANCE_TYPE_END);
         constexpr int PROJECT_ID = 9;
@@ -56,17 +57,129 @@ namespace SharedDataTest
         SharedData *sharedDataMinor = CreateSharedData(SHARER_NAME_MINOR, "./shared_file", PROJECT_ID);
         if (nullptr != sharedDataMinor)
         {
-            int writableData = 189;
-            IMakeSharedData(sharedDataMinor, sizeof(int) * 200, sizeof(int));
-            ISetWritableData(sharedDataMinor, &writableData, sizeof(int));
+            IMakeSharedData(sharedDataMinor, sizeof(int), sizeof(int));
+            ISetWritableData(sharedDataMinor, (void *)&WRITABLE_DATA, sizeof(int));
         }
         if (nullptr != sharedDataPrimary)
         {
-            int readableData[2] = {0};
-            IMakeSharedData(sharedDataPrimary, sizeof(int) * 2, sizeof(int));
-            StatusCode code = IGetReadableData(sharedDataPrimary, readableData, sizeof(int) * 2);
+            int readableData = 0;
+            IMakeSharedData(sharedDataPrimary, sizeof(int), sizeof(int));
+            StatusCode code = IGetReadableData(sharedDataPrimary, &readableData, sizeof(int));
             PrintStringCode(code);
             LogInfo("readableData = %d\n", readableData);
+            EXPECT_EQ(readableData, WRITABLE_DATA);
+            IFree(sharedDataPrimary);
+        }
+        if (nullptr != sharedDataMinor)
+        {
+            IFree(sharedDataMinor);
+        }
+        ILogUnInit();
+    }
+    // ../output_files/test/bin/SharedDataTest --gtest_filter=SharedDataTest.Demo3
+    TEST(SharedDataTest, Demo3)
+    {
+        CreateLogModule();
+        ILogInit(LOG_INSTANCE_TYPE_END);
+        constexpr int PROJECT_ID = 9;
+        SharedData *sharedDataPrimary = CreateSharedData(SHARER_NAME_PRIMARY, "./shared_file", PROJECT_ID);
+        SharedData *sharedDataMinor = CreateSharedData(SHARER_NAME_MINOR, "./shared_file", PROJECT_ID);
+        if (nullptr != sharedDataMinor)
+        {
+            constexpr int WRITABLE_DATA_LENGTH = 9;
+            char writableData[WRITABLE_DATA_LENGTH] = {0};
+            IMakeSharedData(sharedDataMinor, sizeof(int), sizeof(writableData));
+            ISetWritableData(sharedDataMinor, writableData, sizeof(writableData));
+        }
+        if (nullptr != sharedDataPrimary)
+        {
+            constexpr int DEFAULT_DATA = 0;
+            int readableData = DEFAULT_DATA;
+            IMakeSharedData(sharedDataPrimary, sizeof(int), sizeof(int));
+            StatusCode code = IGetReadableData(sharedDataPrimary, &readableData, sizeof(int));
+            PrintStringCode(code);
+            LogInfo("readableData = %d\n", readableData);
+            EXPECT_NE(code.mStatusCode, STATUS_CODE_OK);
+            EXPECT_EQ(readableData, DEFAULT_DATA);
+            IFree(sharedDataPrimary);
+        }
+        if (nullptr != sharedDataMinor)
+        {
+            IFree(sharedDataMinor);
+        }
+        ILogUnInit();
+    }
+    // ../output_files/test/bin/SharedDataTest --gtest_filter=SharedDataTest.Demo4
+    TEST(SharedDataTest, Demo4)
+    {
+        constexpr int WRITABLE_DATA = 189;
+        CreateLogModule();
+        ILogInit(LOG_INSTANCE_TYPE_END);
+        constexpr int PROJECT_ID = 9;
+        SharedData *sharedDataPrimary = CreateSharedData(SHARER_NAME_PRIMARY, "./shared_file", PROJECT_ID);
+        SharedData *sharedDataMinor = CreateSharedData(SHARER_NAME_MINOR, "./shared_file", PROJECT_ID);
+        if (nullptr != sharedDataMinor)
+        {
+            IMakeSharedData(sharedDataMinor, sizeof(int) * 2, sizeof(int));
+            ISetWritableData(sharedDataMinor, (void *)&WRITABLE_DATA, sizeof(int));
+        }
+        if (nullptr != sharedDataPrimary)
+        {
+            constexpr int DEFAULT_DATA = 0;
+            int readableData = DEFAULT_DATA;
+            IMakeSharedData(sharedDataPrimary, sizeof(int), sizeof(int));
+            StatusCode code = IGetReadableData(sharedDataPrimary, &readableData, sizeof(int));
+            PrintStringCode(code);
+            LogInfo("readableData = %d\n", readableData);
+            EXPECT_EQ(code.mStatusCode, STATUS_CODE_OK);
+            EXPECT_EQ(readableData, WRITABLE_DATA);
+            IFree(sharedDataPrimary);
+        }
+        if (nullptr != sharedDataMinor)
+        {
+            IFree(sharedDataMinor);
+        }
+        ILogUnInit();
+    }
+    // ../output_files/test/bin/SharedDataTest --gtest_filter=SharedDataTest.Demo5
+    TEST(SharedDataTest, Demo5)
+    {
+        CreateLogModule();
+        ILogInit(LOG_INSTANCE_TYPE_END);
+        constexpr int PROJECT_ID = 9;
+        SharedData *sharedDataPrimary = CreateSharedData(SHARER_NAME_PRIMARY, "./shared_file", PROJECT_ID);
+        if (nullptr != sharedDataPrimary)
+        {
+            constexpr int DEFAULT_DATA = 0;
+            int readableData = DEFAULT_DATA;
+            IMakeSharedData(sharedDataPrimary, sizeof(int), sizeof(int));
+            StatusCode code = IGetReadableData(sharedDataPrimary, &readableData, sizeof(int));
+            PrintStringCode(code);
+            LogInfo("readableData = %d\n", readableData);
+            EXPECT_NE(code.mStatusCode, STATUS_CODE_OK);
+            EXPECT_EQ(readableData, DEFAULT_DATA);
+            IFree(sharedDataPrimary);
+        }
+        ILogUnInit();
+    }
+    // ../output_files/test/bin/SharedDataTest --gtest_filter=SharedDataTest.Demo6
+    TEST(SharedDataTest, Demo6)
+    {
+        CreateLogModule();
+        ILogInit(LOG_INSTANCE_TYPE_END);
+        constexpr int PROJECT_ID = 9;
+        SharedData *sharedDataPrimary = CreateSharedData(SHARER_NAME_PRIMARY, "./shared_file", PROJECT_ID);
+        SharedData *sharedDataMinor = CreateSharedData(SHARER_NAME_MINOR, "./shared_file", PROJECT_ID);
+        if (nullptr != sharedDataPrimary)
+        {
+            constexpr int DEFAULT_DATA = 0;
+            int readableData = DEFAULT_DATA;
+            IMakeSharedData(sharedDataPrimary, sizeof(int), sizeof(int));
+            StatusCode code = IGetReadableData(sharedDataPrimary, &readableData, sizeof(int));
+            PrintStringCode(code);
+            LogInfo("readableData = %d\n", readableData);
+            EXPECT_NE(code.mStatusCode, STATUS_CODE_OK);
+            EXPECT_EQ(readableData, DEFAULT_DATA);
             IFree(sharedDataPrimary);
         }
         if (nullptr != sharedDataMinor)
diff --git a/utils/SharedData/src/SharedDataImpl.cpp b/utils/SharedData/src/SharedDataImpl.cpp
index eabba1e..80049d0 100644
--- a/utils/SharedData/src/SharedDataImpl.cpp
+++ b/utils/SharedData/src/SharedDataImpl.cpp
@@ -127,9 +127,18 @@ void SharedDataCpp::SetWritableMemory(void *buf, const unsigned int &bufLength)
     }
     if (SHARER_NAME_PRIMARY == mSharerName && bufLength == mMinorReadSize)
     {
-        memcpy((char *)mSharedMemeory + sizeof(UserDataHeader) * THERE_TWO_USER_DATA_HEADER + mPrimaryReadSize,
-               buf,
-               bufLength);
+        UserDataHeader *readableHeader = (UserDataHeader *)((char *)mSharedMemeory);
+        if (memcmp(readableHeader->mUserName, USER_NAME_INIT_NAME, USER_NAME_BUF_LENGTH) == 0 &&
+            mPrimaryReadSize == readableHeader->mDataLength)
+        {
+            memcpy((char *)mSharedMemeory + sizeof(UserDataHeader) * THERE_TWO_USER_DATA_HEADER + mPrimaryReadSize,
+                   buf,
+                   bufLength);
+        }
+        else
+        {
+            LogError("Peer not match.\n");
+        }
     }
     else if (SHARER_NAME_MINOR == mSharerName && bufLength == mPrimaryReadSize)
     {
diff --git a/utils/SharedData/src/SharedDataImpl.h b/utils/SharedData/src/SharedDataImpl.h
index 5e7671f..5aee3cd 100644
--- a/utils/SharedData/src/SharedDataImpl.h
+++ b/utils/SharedData/src/SharedDataImpl.h
@@ -17,6 +17,7 @@
 #include "SharedData.h"
 #include "SharedMemory.h"
 #include <memory>
+#include <mutex>
 constexpr int USER_NAME_BUF_LENGTH = 4;
 #define USER_NAME_INIT_NAME "XING"
 enum USER_DATA_INIT
@@ -29,6 +30,10 @@ typedef struct shared_data_header
 {
     const char *mCheckName;
 } SharedDataHeader;
+typedef struct shared_memory_header
+{
+    std::mutex mMutex;
+};
 typedef struct user_data_header
 {
     char mUserName[USER_NAME_BUF_LENGTH];