chore: import upstream snapshot with attribution

tools/rpc_press/info_thread.h

@@ -0,0 +1,55 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+#ifndef BRPC_RPC_REPLAY_INFO_THREAD_H
+#define BRPC_RPC_REPLAY_INFO_THREAD_H
+
+#include <pthread.h>
+#include <bvar/bvar.h>
+
+namespace brpc {
+
+struct InfoThreadOptions {
+    bvar::LatencyRecorder* latency_recorder;
+    bvar::Adder<int64_t>* sent_count;
+    bvar::Adder<int64_t>* error_count;
+
+    InfoThreadOptions()
+        : latency_recorder(NULL)
+        , sent_count(NULL)
+        , error_count(NULL) {}
+};
+
+class InfoThread {
+public:
+    InfoThread();
+    ~InfoThread();
+    void run();
+    bool start(const InfoThreadOptions&);
+    void stop();
+    
+private:
+    bool _stop;
+    InfoThreadOptions _options;
+    pthread_mutex_t _mutex;
+    pthread_cond_t _cond;
+    pthread_t _tid;
+};
+
+} // namespace brpc
+
+#endif //BRPC_RPC_REPLAY_INFO_THREAD_H