[TS-779]<feature> add file tthread.c

src/util/src/tthread.c

+/*
+ * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
+ *
+ * This program is free software: you can use, redistribute, and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3
+ * or later ("AGPL"), as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * 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/>.
+ */
+
+#include "os.h"
+#include "tthread.h"
+#include "tglobal.h"
+#include "taosdef.h"
+#include "tutil.h"
+#include "tulog.h"
+#include "taoserror.h"
+
+// create new thread
+pthread_t* taosCreateThread( void *(*__start_routine) (void *), void* param) {
+  pthread_t* pthread = (pthread_t*)malloc(sizeof(pthread_t));
+  pthread_attr_t thattr;
+  pthread_attr_init(&thattr);
+  pthread_attr_setdetachstate(&thattr, PTHREAD_CREATE_JOINABLE);
+  int32_t ret = pthread_create(pthread, &thattr, __start_routine, param);
+  pthread_attr_destroy(&thattr);
+
+  if (ret != 0) {
+    free(pthread);
+    return NULL;
+  }
+  return pthread;
+}
+
+// destory thread 
+bool taosDestoryThread(pthread_t* pthread) {
+  if(pthread == NULL) return false;
+  if(taosThreadRunning(pthread)) {
+    pthread_cancel(*pthread);
+    pthread_join(*pthread, NULL);
+  }
+  
+  free(pthread);
+  return true;
+}
+
+// thread running return true
+bool taosThreadRunning(pthread_t* pthread) {
+  if(pthread == NULL) return false;
+  int ret = pthread_kill(*pthread, 0);
+  if(ret == ESRCH)
+    return false;
+  if(ret == EINVAL) 
+    return false;   
+  // alive
+  return true;
+}