diff --git a/HISTORY b/HISTORY
index 9c9d8ab..b9e5e66 100644
--- a/HISTORY
+++ b/HISTORY
@@ -1,5 +1,5 @@
 
-Version 1.44  2020-04-26
+Version 1.44  2020-05-06
   * add test file src/tests/test_pthread_lock.c
   * add uniq_skiplist.[hc]
   * add function split_string_ex
@@ -27,6 +27,7 @@ Version 1.44  2020-04-26
   * add function fc_get_file_line_count_ex
   * uniq_skiplist add function find_ge and support bidirection
   * connection_pool support validate connection on error
+  * fast_task_queue.[hc]: free_queue support init_callback
 
 Version 1.43  2019-12-25
   * replace function call system to getExecResult,
diff --git a/src/common_define.h b/src/common_define.h
index a690e7f..0fbf94b 100644
--- a/src/common_define.h
+++ b/src/common_define.h
@@ -293,6 +293,19 @@ static inline bool fc_string_equal2(const string_t *s1,
 #define fc_string_equals(s1, s2) fc_string_equal(s1, s2)
 #define fc_string_equals2(s1, str2, len2) fc_string_equal2(s1, str2, len2)
 
+static inline int fc_compare_int64(const int64_t n1, const int64_t n2)
+{
+    int64_t sub;
+    sub = n1 - n2;
+    if (sub < 0) {
+        return -1;
+    } else if (sub > 0) {
+        return 1;
+    } else {
+        return 0;
+    }
+}
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/fast_task_queue.c b/src/fast_task_queue.c
index 3a68cda..be83b45 100644
--- a/src/fast_task_queue.c
+++ b/src/fast_task_queue.c
@@ -42,6 +42,18 @@ int task_queue_init(struct fast_task_queue *pQueue)
 	return 0;
 }
 
+static void free_mpool(struct mpool_node *mpool, char *end)
+{
+    char *pt;
+    for (pt=(char *)mpool->blocks; pt < end; pt += g_free_queue.block_size)
+    {
+        free(((struct fast_task_info *)pt)->data);
+    }
+
+    free(mpool->blocks);
+    free(mpool);
+}
+
 static struct mpool_node *malloc_mpool(const int total_alloc_size)
 {
 	struct fast_task_info *pTask;
@@ -91,29 +103,31 @@ static struct mpool_node *malloc_mpool(const int total_alloc_size)
 			pTask->data = (char *)malloc(pTask->size);
 			if (pTask->data == NULL)
 			{
-				char *pt;
-
 				logError("file: "__FILE__", line: %d, " \
 					"malloc %d bytes fail, " \
 					"errno: %d, error info: %s", \
 					__LINE__, pTask->size, \
 					errno, STRERROR(errno));
 
-				for (pt=(char *)mpool->blocks; pt < p; \
-					pt += g_free_queue.block_size)
-				{
-					free(((struct fast_task_info *)pt)->data);
-				}
-
-				free(mpool->blocks);
-				free(mpool);
+                free_mpool(mpool, p);
 				return NULL;
 			}
 		}
+
+        if (g_free_queue.init_callback != NULL)
+        {
+            if (g_free_queue.init_callback(pTask) != 0)
+            {
+                free_mpool(mpool, p);
+                return NULL;
+            }
+        }
 	}
 
-	mpool->last_block = (struct fast_task_info *)(pCharEnd - g_free_queue.block_size);
-	for (p=(char *)mpool->blocks; p<(char *)mpool->last_block; p += g_free_queue.block_size)
+	mpool->last_block = (struct fast_task_info *)
+        (pCharEnd - g_free_queue.block_size);
+	for (p=(char *)mpool->blocks; p<(char *)mpool->last_block;
+            p += g_free_queue.block_size)
 	{
 		pTask = (struct fast_task_info *)p;
 		pTask->next = (struct fast_task_info *)(p + g_free_queue.block_size);
@@ -123,9 +137,10 @@ static struct mpool_node *malloc_mpool(const int total_alloc_size)
 	return mpool;
 }
 
-int free_queue_init_ex(const int max_connections, const int init_connections,
+int free_queue_init_ex2(const int max_connections, const int init_connections,
         const int alloc_task_once, const int min_buff_size,
-        const int max_buff_size, const int arg_size)
+        const int max_buff_size, const int arg_size,
+        TaskInitCallback init_callback)
 {
 #define MAX_DATA_SIZE  (256 * 1024 * 1024)
 	int64_t total_size;
@@ -183,8 +198,8 @@ int free_queue_init_ex(const int max_connections, const int init_connections,
 			}
 		}
 
-		if (max_data_size >= (int64_t)(g_free_queue.block_size + aligned_min_size) *
-			(int64_t)init_connections)
+		if (max_data_size >= (int64_t)(g_free_queue.block_size +
+                    aligned_min_size) * (int64_t)init_connections)
 		{
 			total_size = alloc_size + (int64_t)aligned_min_size *
 					init_connections;
@@ -217,6 +232,7 @@ int free_queue_init_ex(const int max_connections, const int init_connections,
 	g_free_queue.min_buff_size = aligned_min_size;
 	g_free_queue.max_buff_size = aligned_max_size;
 	g_free_queue.arg_size = aligned_arg_size;
+	g_free_queue.init_callback = init_callback;
 
 	logDebug("file: "__FILE__", line: %d, "
 		"max_connections: %d, init_connections: %d, alloc_task_once: %d, "
@@ -290,13 +306,6 @@ int free_queue_init_ex(const int max_connections, const int init_connections,
 	return 0;
 }
 
-int free_queue_init(const int max_connections, const int min_buff_size,
-		const int max_buff_size, const int arg_size)
-{
-    return free_queue_init_ex(max_connections, max_connections,
-        0, min_buff_size, max_buff_size, arg_size);
-}
-
 void free_queue_destroy()
 {
 	struct mpool_node *mpool;
diff --git a/src/fast_task_queue.h b/src/fast_task_queue.h
index 550fd77..e71b552 100644
--- a/src/fast_task_queue.h
+++ b/src/fast_task_queue.h
@@ -30,6 +30,7 @@ struct fast_task_info;
 typedef int (*ThreadLoopCallback) (struct nio_thread_data *pThreadData);
 typedef int (*TaskFinishCallback) (struct fast_task_info *pTask);
 typedef void (*TaskCleanUpCallback) (struct fast_task_info *pTask);
+typedef int (*TaskInitCallback)(struct fast_task_info *pTask);
 
 typedef void (*IOEventCallback) (int sock, short event, void *arg);
 
@@ -94,17 +95,32 @@ struct fast_task_queue
 	int arg_size;
 	int block_size;
 	bool malloc_whole_block;
+    TaskInitCallback init_callback;
 };
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-int free_queue_init(const int max_connections, const int min_buff_size, \
-		const int max_buff_size, const int arg_size);
-int free_queue_init_ex(const int max_connections, const int init_connections,
+int free_queue_init_ex2(const int max_connections, const int init_connections,
         const int alloc_task_once, const int min_buff_size,
-        const int max_buff_size, const int arg_size);
+        const int max_buff_size, const int arg_size,
+        TaskInitCallback init_callback);
+
+static inline int free_queue_init_ex(const int max_connections,
+        const int init_connections, const int alloc_task_once,
+        const int min_buff_size, const int max_buff_size, const int arg_size)
+{
+    return free_queue_init_ex2(max_connections, init_connections,
+            alloc_task_once, min_buff_size, max_buff_size, arg_size, NULL);
+}
+
+static inline int free_queue_init(const int max_connections,
+        const int min_buff_size, const int max_buff_size, const int arg_size)
+{
+    return free_queue_init_ex2(max_connections, max_connections,
+            0, min_buff_size, max_buff_size, arg_size, NULL);
+}
 
 void free_queue_destroy();