fast_task_info add fields: reffer_count and continue_callback

HISTORY

@@ -1,5 +1,5 @@
 
-Version 1.44  2020-10-21
+Version 1.44  2020-10-28
   * add test file src/tests/test_pthread_lock.c
   * add uniq_skiplist.[hc]
   * add function split_string_ex

src/fast_task_queue.h

@@ -87,7 +87,9 @@ struct fast_task_info
         uint8_t current;
         volatile uint8_t notify;
     } nio_stages; //stages for network IO
-    bool canceled;   //if task canceled
+    int (*continue_callback)(struct fast_task_info *task);  //for continue stage
+    volatile int8_t reffer_count;
+    volatile int8_t canceled;   //if task canceled
     int connect_timeout; //for client side
     int network_timeout;
 	int64_t req_count; //request count

src/ioevent_loop.h

@@ -32,20 +32,16 @@ int ioevent_remove(IOEventPoller *ioevent, void *data);
 int ioevent_set(struct fast_task_info *pTask, struct nio_thread_data *pThread,
 	int sock, short event, IOEventCallback callback, const int timeout);
 
+//only called by the nio thread
 static inline void ioevent_add_to_deleted_list(struct fast_task_info *task)
 {
-    if (task->thread_data == NULL)
+    if (!__sync_bool_compare_and_swap(&task->canceled, 0, 1))
     {
-        return;
-    }
-
-    if (task->canceled) {
-        logError("file: "__FILE__", line: %d, "
+        logWarning("file: "__FILE__", line: %d, "
                 "task %p already canceled", __LINE__, task);
         return;
     }
 
-    task->canceled = true;
     task->next = task->thread_data->deleted_list;
     task->thread_data->deleted_list = task;
 }