refactor code

source/libs/transport/src/thttp.c

@@ -37,6 +37,7 @@ typedef struct SHttpModule {
   SHashObj*   connStatusTable;
   SHashObj*   connPool;
   int8_t      quit;
+  int16_t     connNum;
 } SHttpModule;
 
 typedef struct SHttpMsg {
@@ -272,6 +273,7 @@ static void httpMayDiscardMsg(SHttpModule* http, SAsyncItem* item) {
     QUEUE_PUSH(&item->qmsg, &quitMsg->q);
   }
 }
+
 static void httpAsyncCb(uv_async_t* handle) {
   SAsyncItem*  item = handle->data;
   SHttpModule* http = item->pThrd;
@@ -317,6 +319,14 @@ static FORCE_INLINE void destroyHttpClient(SHttpClient* cli) {
 
 static FORCE_INLINE void clientCloseCb(uv_handle_t* handle) {
   SHttpClient* cli = handle->data;
+
+  int64_t      chanId = cli->chanId;
+  SHttpModule* http = taosAcquireRef(httpRefMgt, cli->chanId);
+  if (http != NULL) {
+    http->connNum -= 1;
+    taosReleaseRef(httpRefMgt, chanId);
+  }
+
   destroyHttpClient(cli);
 }
 
@@ -374,6 +384,8 @@ static void clientConnCb(uv_connect_t* req, int32_t status) {
     taosReleaseRef(httpRefMgt, chanId);
     return;
   }
+  http->connNum += 1;
+
   httpFailFastMayUpdate(http->connStatusTable, cli->addr, cli->port, 1);
 
   status = uv_write(&cli->req, (uv_stream_t*)&cli->tcp, cli->wbuf, 2, clientSentCb);
@@ -590,6 +602,8 @@ END:
 }
 
 static void httpModuleDestroy(SHttpModule* http) {
+  if (http == NULL) return;
+
   if (http->asyncPool != NULL) {
     TRANS_DESTROY_ASYNC_POOL_MSG(http->asyncPool, SHttpMsg, httpDestroyMsgWrapper, NULL);
     transAsyncPoolDestroy(http->asyncPool);
@@ -598,11 +612,13 @@ static void httpModuleDestroy(SHttpModule* http) {
     uv_loop_close(http->loop);
     taosMemoryFree(http->loop);
   }
+
   taosHashCleanup(http->connStatusTable);
   // not free http, http freeed by ref
 }
 
 void httpModuleDestroy2(SHttpModule* http) {
+  if (http == NULL) return;
   httpModuleDestroy(http);
   taosMemoryFree(http);
 }
@@ -669,49 +685,50 @@ int64_t transInitHttpChanImpl() {
   SHttpModule* http = taosMemoryCalloc(1, sizeof(SHttpModule));
   if (http == NULL) {
     terrno = TSDB_CODE_OUT_OF_MEMORY;
-    return terrno;
+    goto _ERROR;
   }
 
   http->connStatusTable = taosHashInit(4, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BINARY), true, HASH_ENTRY_LOCK);
   if (http->connStatusTable == NULL) {
-    httpModuleDestroy2(http);
     terrno = TSDB_CODE_OUT_OF_MEMORY;
-    return terrno;
+    goto _ERROR;
   }
 
   http->loop = taosMemoryMalloc(sizeof(uv_loop_t));
   if (http->loop == NULL) {
-    httpModuleDestroy2(http);
     terrno = TSDB_CODE_OUT_OF_MEMORY;
-    return terrno;
+    goto _ERROR;
   }
 
   int err = uv_loop_init(http->loop);
   if (err != 0) {
     tError("http-report failed init uv, reason:%s", uv_strerror(err));
-    httpModuleDestroy2(http);
     terrno = TSDB_CODE_THIRDPARTY_ERROR;
-    return terrno;
+    goto _ERROR;
   }
 
   http->asyncPool = transAsyncPoolCreate(http->loop, 1, http, httpAsyncCb);
-  if (NULL == http->asyncPool) {
+  if (http->asyncPool == NULL) {
-    httpModuleDestroy2(http);
+    goto _ERROR;
-    return terrno;
   }
+
   http->quit = 0;
 
   err = taosThreadCreate(&http->thread, NULL, httpThread, (void*)http);
   if (err != 0) {
-    httpModuleDestroy2(http);
     terrno = TAOS_SYSTEM_ERROR(errno);
-    return terrno;
+    goto _ERROR;
   }
+
   int64_t ref = taosAddRef(httpRefMgt, http);
   if (ref < 0) {
-    return terrno;
+    goto _ERROR;
   }
   return ref;
+
+_ERROR:
+  httpModuleDestroy2(http);
+  return terrno;
 }
 int64_t taosInitHttpChan() {
   taosThreadOnce(&transHttpInit, transHttpEnvInit);