1 files changed, 156 insertions, 0 deletions
diff --git a/include/grpc++/impl/codegen/async_unary_call.h b/include/grpc++/impl/codegen/async_unary_call.h
new file mode 100644
index 0000000000..481b20b535
--- /dev/null
+++ b/include/grpc++/impl/codegen/async_unary_call.h
@@ -0,0 +1,156 @@
+/*
+ *
+ * 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.
+ *
+ */
+
+#ifndef GRPCXX_IMPL_CODEGEN_ASYNC_UNARY_CALL_H
+#define GRPCXX_IMPL_CODEGEN_ASYNC_UNARY_CALL_H
+
+#include <grpc++/impl/codegen/call.h>
+#include <grpc++/impl/codegen/channel_interface.h>
+#include <grpc++/impl/codegen/client_context.h>
+#include <grpc++/impl/codegen/server_context.h>
+#include <grpc++/impl/codegen/service_type.h>
+#include <grpc++/impl/codegen/status.h>
+#include <grpc/impl/codegen/log.h>
+
+namespace grpc {
+
+class CompletionQueue;
+
+template <class R>
+class ClientAsyncResponseReaderInterface {
+ public:
+  virtual ~ClientAsyncResponseReaderInterface() {}
+  virtual void ReadInitialMetadata(void* tag) = 0;
+  virtual void Finish(R* msg, Status* status, void* tag) = 0;
+};
+
+template <class R>
+class ClientAsyncResponseReader GRPC_FINAL
+    : public ClientAsyncResponseReaderInterface<R> {
+ public:
+  template <class W>
+  ClientAsyncResponseReader(ChannelInterface* channel, CompletionQueue* cq,
+                            const RpcMethod& method, ClientContext* context,
+                            const W& request)
+      : context_(context), call_(channel->CreateCall(method, context, cq)) {
+    init_buf_.SendInitialMetadata(context->send_initial_metadata_);
+    // TODO(ctiller): don't assert
+    GPR_ASSERT(init_buf_.SendMessage(request).ok());
+    init_buf_.ClientSendClose();
+    call_.PerformOps(&init_buf_);
+  }
+
+  void ReadInitialMetadata(void* tag) {
+    GPR_ASSERT(!context_->initial_metadata_received_);
+
+    meta_buf_.set_output_tag(tag);
+    meta_buf_.RecvInitialMetadata(context_);
+    call_.PerformOps(&meta_buf_);
+  }
+
+  void Finish(R* msg, Status* status, void* tag) {
+    finish_buf_.set_output_tag(tag);
+    if (!context_->initial_metadata_received_) {
+      finish_buf_.RecvInitialMetadata(context_);
+    }
+    finish_buf_.RecvMessage(msg);
+    finish_buf_.ClientRecvStatus(context_, status);
+    call_.PerformOps(&finish_buf_);
+  }
+
+ private:
+  ClientContext* context_;
+  Call call_;
+  SneakyCallOpSet<CallOpSendInitialMetadata, CallOpSendMessage,
+                  CallOpClientSendClose> init_buf_;
+  CallOpSet<CallOpRecvInitialMetadata> meta_buf_;
+  CallOpSet<CallOpRecvInitialMetadata, CallOpRecvMessage<R>,
+            CallOpClientRecvStatus> finish_buf_;
+};
+
+template <class W>
+class ServerAsyncResponseWriter GRPC_FINAL
+    : public ServerAsyncStreamingInterface {
+ public:
+  explicit ServerAsyncResponseWriter(ServerContext* ctx)
+      : call_(nullptr, nullptr, nullptr), ctx_(ctx) {}
+
+  void SendInitialMetadata(void* tag) GRPC_OVERRIDE {
+    GPR_ASSERT(!ctx_->sent_initial_metadata_);
+
+    meta_buf_.set_output_tag(tag);
+    meta_buf_.SendInitialMetadata(ctx_->initial_metadata_);
+    ctx_->sent_initial_metadata_ = true;
+    call_.PerformOps(&meta_buf_);
+  }
+
+  void Finish(const W& msg, const Status& status, void* tag) {
+    finish_buf_.set_output_tag(tag);
+    if (!ctx_->sent_initial_metadata_) {
+      finish_buf_.SendInitialMetadata(ctx_->initial_metadata_);
+      ctx_->sent_initial_metadata_ = true;
+    }
+    // The response is dropped if the status is not OK.
+    if (status.ok()) {
+      finish_buf_.ServerSendStatus(ctx_->trailing_metadata_,
+                                   finish_buf_.SendMessage(msg));
+    } else {
+      finish_buf_.ServerSendStatus(ctx_->trailing_metadata_, status);
+    }
+    call_.PerformOps(&finish_buf_);
+  }
+
+  void FinishWithError(const Status& status, void* tag) {
+    GPR_ASSERT(!status.ok());
+    finish_buf_.set_output_tag(tag);
+    if (!ctx_->sent_initial_metadata_) {
+      finish_buf_.SendInitialMetadata(ctx_->initial_metadata_);
+      ctx_->sent_initial_metadata_ = true;
+    }
+    finish_buf_.ServerSendStatus(ctx_->trailing_metadata_, status);
+    call_.PerformOps(&finish_buf_);
+  }
+
+ private:
+  void BindCall(Call* call) GRPC_OVERRIDE { call_ = *call; }
+
+  Call call_;
+  ServerContext* ctx_;
+  CallOpSet<CallOpSendInitialMetadata> meta_buf_;
+  CallOpSet<CallOpSendInitialMetadata, CallOpSendMessage,
+            CallOpServerSendStatus> finish_buf_;
+};
+
+}  // namespace grpc
+
+#endif  // GRPCXX_IMPL_CODEGEN_ASYNC_UNARY_CALL_H