diff --git a/include/util/tmempool.h b/include/util/tmempool.h
index 3e3db738a9f372082d785bedb28da776c23ba59f..7a5aca7b34f6393c5440f030f3c416ca18b08a0f 100644
--- a/include/util/tmempool.h
+++ b/include/util/tmempool.h
@@ -12,25 +12,24 @@
  * You should have received a copy of the GNU Affero General Public License
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
-#ifndef _TD_UTIL_MEMPOOL_H
-#define _TD_UTIL_MEMPOOL_H
+#ifndef _TD_UTIL_MEMPOOL_H_
+#define _TD_UTIL_MEMPOOL_H_
+
+#include "os.h"
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-#define mpool_h void *
-
-mpool_h taosMemPoolInit(int maxNum, int blockSize);
-
-char *taosMemPoolMalloc(mpool_h handle);
-
-void taosMemPoolFree(mpool_h handle, char *p);
+typedef void *mpool_h;
 
-void taosMemPoolCleanUp(mpool_h handle);
+mpool_h taosMemPoolInit(int32_t maxNum, int32_t blockSize);
+char   *taosMemPoolMalloc(mpool_h handle);
+void    taosMemPoolFree(mpool_h handle, char *p);
+void    taosMemPoolCleanUp(mpool_h handle);
 
 #ifdef __cplusplus
 }
 #endif
 
-#endif /*_TD_UTIL_MEMPOOL_H*/
+#endif /*_TD_UTIL_MEMPOOL_H_*/
diff --git a/source/util/src/tmempool.c b/source/util/src/tmempool.c
index f980a05629f5504d14bdf168b0d753d42f8b4c57..1fc9bfc7ab458dfda7d1e74123bbea2366a70e38 100644
--- a/source/util/src/tmempool.c
+++ b/source/util/src/tmempool.c
@@ -13,22 +13,23 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include "tlog.h"
+#define _DEFAULT_SOURCE
 #include "tmempool.h"
+#include "tlog.h"
 #include "tutil.h"
 
 typedef struct {
-  int             numOfFree;  /* number of free slots */
-  int             first;      /* the first free slot  */
-  int             numOfBlock; /* the number of blocks */
-  int             blockSize;  /* block size in bytes  */
-  int *           freeList;   /* the index list       */
-  char *          pool;       /* the actual mem block */
+  int32_t         numOfFree;  /* number of free slots */
+  int32_t         first;      /* the first free slot  */
+  int32_t         numOfBlock; /* the number of blocks */
+  int32_t         blockSize;  /* block size in bytes  */
+  int32_t        *freeList;   /* the index list       */
+  char           *pool;       /* the actual mem block */
   pthread_mutex_t mutex;
 } pool_t;
 
-mpool_h taosMemPoolInit(int numOfBlock, int blockSize) {
-  int     i;
+mpool_h taosMemPoolInit(int32_t numOfBlock, int32_t blockSize) {
+  int32_t i;
   pool_t *pool_p;
 
   if (numOfBlock <= 1 || blockSize <= 1) {
@@ -47,7 +48,7 @@ mpool_h taosMemPoolInit(int numOfBlock, int blockSize) {
   pool_p->blockSize = blockSize;
   pool_p->numOfBlock = numOfBlock;
   pool_p->pool = (char *)malloc((size_t)(blockSize * numOfBlock));
-  pool_p->freeList = (int *)malloc(sizeof(int) * (size_t)numOfBlock);
+  pool_p->freeList = (int32_t *)malloc(sizeof(int32_t) * (size_t)numOfBlock);
 
   if (pool_p->pool == NULL || pool_p->freeList == NULL) {
     uError("failed to allocate memory\n");
@@ -69,7 +70,7 @@ mpool_h taosMemPoolInit(int numOfBlock, int blockSize) {
 }
 
 char *taosMemPoolMalloc(mpool_h handle) {
-  char *  pos = NULL;
+  char   *pos = NULL;
   pool_t *pool_p = (pool_t *)handle;
 
   pthread_mutex_lock(&(pool_p->mutex));
@@ -88,20 +89,20 @@ char *taosMemPoolMalloc(mpool_h handle) {
 }
 
 void taosMemPoolFree(mpool_h handle, char *pMem) {
-  int     index;
+  int32_t index;
   pool_t *pool_p = (pool_t *)handle;
 
   if (pMem == NULL) return;
 
-  index = (int)(pMem - pool_p->pool) % pool_p->blockSize;
+  index = (int32_t)(pMem - pool_p->pool) % pool_p->blockSize;
   if (index != 0) {
     uError("invalid free address:%p\n", pMem);
     return;
   }
 
-  index = (int)((pMem - pool_p->pool) / pool_p->blockSize);
+  index = (int32_t)((pMem - pool_p->pool) / pool_p->blockSize);
   if (index < 0 || index >= pool_p->numOfBlock) {
-    uError("mempool: error, invalid address:%p\n", pMem);
+    uError("mempool: error, invalid address:%p", pMem);
     return;
   }