Initial checkin of gRPC to third_party/

third_party/grpc/test/cpp/qps/server_async.cc

Index: third_party/grpc/test/cpp/qps/server_async.cc
diff --git a/third_party/grpc/test/cpp/qps/server_async.cc b/third_party/grpc/test/cpp/qps/server_async.cc
new file mode 100644
index 0000000000000000000000000000000000000000..2024e0bfef8ffde4b2fa7cad5e0ee29e27b13b52
--- /dev/null
+++ b/third_party/grpc/test/cpp/qps/server_async.cc
@@ -0,0 +1,407 @@
+/*
+ *
+ * Copyright 2015-2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <forward_list>
+#include <functional>
+#include <memory>
+#include <mutex>
+#include <thread>
+
+#include <gflags/gflags.h>
+#include <grpc++/generic/async_generic_service.h>
+#include <grpc++/security/server_credentials.h>
+#include <grpc++/server.h>
+#include <grpc++/server_builder.h>
+#include <grpc++/server_context.h>
+#include <grpc++/support/config.h>
+#include <grpc/grpc.h>
+#include <grpc/support/alloc.h>
+#include <grpc/support/host_port.h>
+#include <grpc/support/log.h>
+#include <gtest/gtest.h>
+
+#include "src/proto/grpc/testing/services.grpc.pb.h"
+#include "test/core/util/test_config.h"
+#include "test/cpp/qps/server.h"
+
+namespace grpc {
+namespace testing {
+
+template <class RequestType, class ResponseType, class ServiceType,
+          class ServerContextType>
+class AsyncQpsServerTest : public Server {
+ public:
+  AsyncQpsServerTest(
+      const ServerConfig &config,
+      std::function<void(ServerBuilder *, ServiceType *)> register_service,
+      std::function<void(ServiceType *, ServerContextType *, RequestType *,
+                         ServerAsyncResponseWriter<ResponseType> *,
+                         CompletionQueue *, ServerCompletionQueue *, void *)>
+          request_unary_function,
+      std::function<void(ServiceType *, ServerContextType *,
+                         ServerAsyncReaderWriter<ResponseType, RequestType> *,
+                         CompletionQueue *, ServerCompletionQueue *, void *)>
+          request_streaming_function,
+      std::function<grpc::Status(const PayloadConfig &, const RequestType *,
+                                 ResponseType *)> process_rpc)
+      : Server(config) {
+    char *server_address = NULL;
+
+    gpr_join_host_port(&server_address, "::", port());
+
+    ServerBuilder builder;
+    builder.AddListeningPort(server_address,
+                             Server::CreateServerCredentials(config));
+    gpr_free(server_address);
+
+    register_service(&builder, &async_service_);
+
+    int num_threads = config.async_server_threads();
+    if (num_threads <= 0) {  // dynamic sizing
+      num_threads = cores();
+      gpr_log(GPR_INFO, "Sizing async server to %d threads", num_threads);
+    }
+
+    for (int i = 0; i < num_threads; i++) {
+      srv_cqs_.emplace_back(builder.AddCompletionQueue());
+    }
+
+    server_ = builder.BuildAndStart();
+
+    using namespace std::placeholders;
+
+    auto process_rpc_bound =
+        std::bind(process_rpc, config.payload_config(), _1, _2);
+
+    for (int i = 0; i < 10000 / num_threads; i++) {
+      for (int j = 0; j < num_threads; j++) {
+        if (request_unary_function) {
+          auto request_unary =
+              std::bind(request_unary_function, &async_service_, _1, _2, _3,
+                        srv_cqs_[j].get(), srv_cqs_[j].get(), _4);
+          contexts_.push_front(
+              new ServerRpcContextUnaryImpl(request_unary, process_rpc_bound));
+        }
+        if (request_streaming_function) {
+          auto request_streaming =
+              std::bind(request_streaming_function, &async_service_, _1, _2,
+                        srv_cqs_[j].get(), srv_cqs_[j].get(), _3);
+          contexts_.push_front(new ServerRpcContextStreamingImpl(
+              request_streaming, process_rpc_bound));
+        }
+      }
+    }
+
+    for (int i = 0; i < num_threads; i++) {
+      shutdown_state_.emplace_back(new PerThreadShutdownState());
+    }
+    for (int i = 0; i < num_threads; i++) {
+      threads_.emplace_back(&AsyncQpsServerTest::ThreadFunc, this, i);
+    }
+  }
+  ~AsyncQpsServerTest() {
+    auto deadline = GRPC_TIMEOUT_SECONDS_TO_DEADLINE(10);
+    server_->Shutdown(deadline);
+    for (auto ss = shutdown_state_.begin(); ss != shutdown_state_.end(); ++ss) {
+      (*ss)->set_shutdown();
+    }
+    for (auto thr = threads_.begin(); thr != threads_.end(); thr++) {
+      thr->join();
+    }
+    for (auto cq = srv_cqs_.begin(); cq != srv_cqs_.end(); ++cq) {
+      (*cq)->Shutdown();
+      bool ok;
+      void *got_tag;
+      while ((*cq)->Next(&got_tag, &ok))
+        ;
+    }
+    while (!contexts_.empty()) {
+      delete contexts_.front();
+      contexts_.pop_front();
+    }
+  }
+
+ private:
+  void ThreadFunc(int rank) {
+    // Wait until work is available or we are shutting down
+    bool ok;
+    void *got_tag;
+    while (srv_cqs_[rank]->Next(&got_tag, &ok)) {
+      ServerRpcContext *ctx = detag(got_tag);
+      // The tag is a pointer to an RPC context to invoke
+      const bool still_going = ctx->RunNextState(ok);
+      if (!shutdown_state_[rank]->shutdown()) {
+        // this RPC context is done, so refresh it
+        if (!still_going) {
+          ctx->Reset();
+        }
+      } else {
+        return;
+      }
+    }
+    return;
+  }
+
+  class ServerRpcContext {
+   public:
+    ServerRpcContext() {}
+    virtual ~ServerRpcContext(){};
+    virtual bool RunNextState(bool) = 0;  // next state, return false if done
+    virtual void Reset() = 0;             // start this back at a clean state
+  };
+  static void *tag(ServerRpcContext *func) {
+    return reinterpret_cast<void *>(func);
+  }
+  static ServerRpcContext *detag(void *tag) {
+    return reinterpret_cast<ServerRpcContext *>(tag);
+  }
+
+  class ServerRpcContextUnaryImpl GRPC_FINAL : public ServerRpcContext {
+   public:
+    ServerRpcContextUnaryImpl(
+        std::function<void(ServerContextType *, RequestType *,
+                           grpc::ServerAsyncResponseWriter<ResponseType> *,
+                           void *)> request_method,
+        std::function<grpc::Status(const RequestType *, ResponseType *)>
+            invoke_method)
+        : srv_ctx_(new ServerContextType),
+          next_state_(&ServerRpcContextUnaryImpl::invoker),
+          request_method_(request_method),
+          invoke_method_(invoke_method),
+          response_writer_(srv_ctx_.get()) {
+      request_method_(srv_ctx_.get(), &req_, &response_writer_,
+                      AsyncQpsServerTest::tag(this));
+    }
+    ~ServerRpcContextUnaryImpl() GRPC_OVERRIDE {}
+    bool RunNextState(bool ok) GRPC_OVERRIDE {
+      return (this->*next_state_)(ok);
+    }
+    void Reset() GRPC_OVERRIDE {
+      srv_ctx_.reset(new ServerContextType);
+      req_ = RequestType();
+      response_writer_ =
+          grpc::ServerAsyncResponseWriter<ResponseType>(srv_ctx_.get());
+
+      // Then request the method
+      next_state_ = &ServerRpcContextUnaryImpl::invoker;
+      request_method_(srv_ctx_.get(), &req_, &response_writer_,
+                      AsyncQpsServerTest::tag(this));
+    }
+
+   private:
+    bool finisher(bool) { return false; }
+    bool invoker(bool ok) {
+      if (!ok) {
+        return false;
+      }
+
+      ResponseType response;
+
+      // Call the RPC processing function
+      grpc::Status status = invoke_method_(&req_, &response);
+
+      // Have the response writer work and invoke on_finish when done
+      next_state_ = &ServerRpcContextUnaryImpl::finisher;
+      response_writer_.Finish(response, status, AsyncQpsServerTest::tag(this));
+      return true;
+    }
+    std::unique_ptr<ServerContextType> srv_ctx_;
+    RequestType req_;
+    bool (ServerRpcContextUnaryImpl::*next_state_)(bool);
+    std::function<void(ServerContextType *, RequestType *,
+                       grpc::ServerAsyncResponseWriter<ResponseType> *, void *)>
+        request_method_;
+    std::function<grpc::Status(const RequestType *, ResponseType *)>
+        invoke_method_;
+    grpc::ServerAsyncResponseWriter<ResponseType> response_writer_;
+  };
+
+  class ServerRpcContextStreamingImpl GRPC_FINAL : public ServerRpcContext {
+   public:
+    ServerRpcContextStreamingImpl(
+        std::function<void(
+            ServerContextType *,
+            grpc::ServerAsyncReaderWriter<ResponseType, RequestType> *, void *)>
+            request_method,
+        std::function<grpc::Status(const RequestType *, ResponseType *)>
+            invoke_method)
+        : srv_ctx_(new ServerContextType),
+          next_state_(&ServerRpcContextStreamingImpl::request_done),
+          request_method_(request_method),
+          invoke_method_(invoke_method),
+          stream_(srv_ctx_.get()) {
+      request_method_(srv_ctx_.get(), &stream_, AsyncQpsServerTest::tag(this));
+    }
+    ~ServerRpcContextStreamingImpl() GRPC_OVERRIDE {}
+    bool RunNextState(bool ok) GRPC_OVERRIDE {
+      return (this->*next_state_)(ok);
+    }
+    void Reset() GRPC_OVERRIDE {
+      srv_ctx_.reset(new ServerContextType);
+      req_ = RequestType();
+      stream_ = grpc::ServerAsyncReaderWriter<ResponseType, RequestType>(
+          srv_ctx_.get());
+
+      // Then request the method
+      next_state_ = &ServerRpcContextStreamingImpl::request_done;
+      request_method_(srv_ctx_.get(), &stream_, AsyncQpsServerTest::tag(this));
+    }
+
+   private:
+    bool request_done(bool ok) {
+      if (!ok) {
+        return false;
+      }
+      stream_.Read(&req_, AsyncQpsServerTest::tag(this));
+      next_state_ = &ServerRpcContextStreamingImpl::read_done;
+      return true;
+    }
+
+    bool read_done(bool ok) {
+      if (ok) {
+        // invoke the method
+        ResponseType response;
+        // Call the RPC processing function
+        grpc::Status status = invoke_method_(&req_, &response);
+        // initiate the write
+        stream_.Write(response, AsyncQpsServerTest::tag(this));
+        next_state_ = &ServerRpcContextStreamingImpl::write_done;
+      } else {  // client has sent writes done
+        // finish the stream
+        stream_.Finish(Status::OK, AsyncQpsServerTest::tag(this));
+        next_state_ = &ServerRpcContextStreamingImpl::finish_done;
+      }
+      return true;
+    }
+    bool write_done(bool ok) {
+      // now go back and get another streaming read!
+      if (ok) {
+        stream_.Read(&req_, AsyncQpsServerTest::tag(this));
+        next_state_ = &ServerRpcContextStreamingImpl::read_done;
+      } else {
+        stream_.Finish(Status::OK, AsyncQpsServerTest::tag(this));
+        next_state_ = &ServerRpcContextStreamingImpl::finish_done;
+      }
+      return true;
+    }
+    bool finish_done(bool ok) { return false; /* reset the context */ }
+
+    std::unique_ptr<ServerContextType> srv_ctx_;
+    RequestType req_;
+    bool (ServerRpcContextStreamingImpl::*next_state_)(bool);
+    std::function<void(
+        ServerContextType *,
+        grpc::ServerAsyncReaderWriter<ResponseType, RequestType> *, void *)>
+        request_method_;
+    std::function<grpc::Status(const RequestType *, ResponseType *)>
+        invoke_method_;
+    grpc::ServerAsyncReaderWriter<ResponseType, RequestType> stream_;
+  };
+
+  std::vector<std::thread> threads_;
+  std::unique_ptr<grpc::Server> server_;
+  std::vector<std::unique_ptr<grpc::ServerCompletionQueue>> srv_cqs_;
+  ServiceType async_service_;
+  std::forward_list<ServerRpcContext *> contexts_;
+
+  class PerThreadShutdownState {
+   public:
+    PerThreadShutdownState() : shutdown_(false) {}
+
+    bool shutdown() const {
+      std::lock_guard<std::mutex> lock(mutex_);
+      return shutdown_;
+    }
+
+    void set_shutdown() {
+      std::lock_guard<std::mutex> lock(mutex_);
+      shutdown_ = true;
+    }
+
+   private:
+    mutable std::mutex mutex_;
+    bool shutdown_;
+  };
+  std::vector<std::unique_ptr<PerThreadShutdownState>> shutdown_state_;
+};
+
+static void RegisterBenchmarkService(ServerBuilder *builder,
+                                     BenchmarkService::AsyncService *service) {
+  builder->RegisterService(service);
+}
+static void RegisterGenericService(ServerBuilder *builder,
+                                   grpc::AsyncGenericService *service) {
+  builder->RegisterAsyncGenericService(service);
+}
+
+static Status ProcessSimpleRPC(const PayloadConfig &,
+                               const SimpleRequest *request,
+                               SimpleResponse *response) {
+  if (request->response_size() > 0) {
+    if (!Server::SetPayload(request->response_type(), request->response_size(),
+                            response->mutable_payload())) {
+      return Status(grpc::StatusCode::INTERNAL, "Error creating payload.");
+    }
+  }
+  return Status::OK;
+}
+
+static Status ProcessGenericRPC(const PayloadConfig &payload_config,
+                                const ByteBuffer *request,
+                                ByteBuffer *response) {
+  int resp_size = payload_config.bytebuf_params().resp_size();
+  std::unique_ptr<char[]> buf(new char[resp_size]);
+  gpr_slice s = gpr_slice_from_copied_buffer(buf.get(), resp_size);
+  Slice slice(s, Slice::STEAL_REF);
+  *response = ByteBuffer(&slice, 1);
+  return Status::OK;
+}
+
+std::unique_ptr<Server> CreateAsyncServer(const ServerConfig &config) {
+  return std::unique_ptr<Server>(new AsyncQpsServerTest<
+      SimpleRequest, SimpleResponse, BenchmarkService::AsyncService,
+      grpc::ServerContext>(
+      config, RegisterBenchmarkService,
+      &BenchmarkService::AsyncService::RequestUnaryCall,
+      &BenchmarkService::AsyncService::RequestStreamingCall, ProcessSimpleRPC));
+}
+std::unique_ptr<Server> CreateAsyncGenericServer(const ServerConfig &config) {
+  return std::unique_ptr<Server>(
+      new AsyncQpsServerTest<ByteBuffer, ByteBuffer, grpc::AsyncGenericService,
+                             grpc::GenericServerContext>(
+          config, RegisterGenericService, nullptr,
+          &grpc::AsyncGenericService::RequestCall, ProcessGenericRPC));
+}
+
+}  // namespace testing
+}  // namespace grpc