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src/rootserver/ob_thread_idling.cpp

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+/**
+ * Copyright (c) 2021 OceanBase
+ * OceanBase CE is licensed under Mulan PubL v2.
+ * You can use this software according to the terms and conditions of the Mulan PubL v2.
+ * You may obtain a copy of Mulan PubL v2 at:
+ *          http://license.coscl.org.cn/MulanPubL-2.0
+ * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+ * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+ * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+ * See the Mulan PubL v2 for more details.
+ */
+
+#define USING_LOG_PREFIX RS
+
+#include "ob_thread_idling.h"
+#include "share/ob_define.h"
+#include "lib/time/ob_time_utility.h"
+namespace oceanbase {
+namespace rootserver {
+using namespace common;
+
+ObThreadIdling::ObThreadIdling(volatile bool& stop) : cond_(), stop_(stop), wakeup_cnt_(0)
+{
+  cond_.init(ObWaitEventIds::THREAD_IDLING_COND_WAIT);
+}
+
+void ObThreadIdling::wakeup()
+{
+  ObThreadCondGuard guard(cond_);
+  wakeup_cnt_++;
+  int tmp_ret = cond_.broadcast();
+  if (OB_SUCCESS != tmp_ret) {
+    LOG_WARN("condition broadcast fail", K(tmp_ret));
+  }
+}
+
+int ObThreadIdling::idle()
+{
+  int ret = OB_SUCCESS;
+  const int64_t max_time_us = INT64_MAX;
+  if (OB_FAIL(idle(max_time_us))) {
+    LOG_WARN("idle failed", K(ret));
+  }
+  return ret;
+}
+
+int ObThreadIdling::idle(const int64_t max_idle_time_us)
+{
+  ObThreadCondGuard guard(cond_);
+  int ret = OB_SUCCESS;
+  const int64_t begin_time_ms = ObTimeUtility::current_time() / 1000;
+  while (!stop_ && wakeup_cnt_ == 0 && OB_SUCC(ret)) {
+    const int64_t now_ms = ObTimeUtility::current_time() / 1000;
+    const int64_t idle_time_ms = std::min(max_idle_time_us, get_idle_interval_us()) / 1000;
+    int64_t wait_time_ms = begin_time_ms + idle_time_ms - now_ms;
+    if (wait_time_ms <= 0) {
+      break;
+    }
+    wait_time_ms = std::min(1000l, wait_time_ms);
+    if (OB_FAIL(cond_.wait(static_cast<int>(wait_time_ms)))) {
+      ret = OB_SUCCESS;
+    } else {
+      break;
+    }
+  }
+  if (stop_) {
+    ret = OB_CANCELED;
+  }
+  wakeup_cnt_ = 0;
+  return ret;
+}
+
+}  // end namespace rootserver
+}  // end namespace oceanbase