Initial checkin of gRPC to third_party/

third_party/grpc/src/node/ext/call.h

+/*
+ *
+ * Copyright 2015, 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 NET_GRPC_NODE_CALL_H_
+#define NET_GRPC_NODE_CALL_H_
+
+#include <memory>
+#include <vector>
+
+#include <node.h>
+#include <nan.h>
+#include "grpc/grpc.h"
+#include "grpc/support/log.h"
+
+#include "channel.h"
+
+
+namespace grpc {
+namespace node {
+
+using std::unique_ptr;
+using std::shared_ptr;
+
+typedef Nan::Persistent<v8::Value, Nan::CopyablePersistentTraits<v8::Value>> PersistentValue;
+
+v8::Local<v8::Value> nanErrorWithCode(const char *msg, grpc_call_error code);
+
+v8::Local<v8::Value> ParseMetadata(const grpc_metadata_array *metadata_array);
+
+struct Resources {
+  std::vector<unique_ptr<Nan::Utf8String> > strings;
+  std::vector<unique_ptr<PersistentValue> > handles;
+};
+
+bool CreateMetadataArray(v8::Local<v8::Object> metadata,
+                         grpc_metadata_array *array,
+                         shared_ptr<Resources> resources);
+
+class Op {
+ public:
+  virtual v8::Local<v8::Value> GetNodeValue() const = 0;
+  virtual bool ParseOp(v8::Local<v8::Value> value, grpc_op *out,
+                       shared_ptr<Resources> resources) = 0;
+  virtual ~Op();
+  v8::Local<v8::Value> GetOpType() const;
+
+ protected:
+  virtual std::string GetTypeString() const = 0;
+};
+
+typedef std::vector<unique_ptr<Op>> OpVec;
+struct tag {
+  tag(Nan::Callback *callback, OpVec *ops,
+      shared_ptr<Resources> resources);
+  ~tag();
+  Nan::Callback *callback;
+  OpVec *ops;
+  shared_ptr<Resources> resources;
+};
+
+v8::Local<v8::Value> GetTagNodeValue(void *tag);
+
+Nan::Callback *GetTagCallback(void *tag);
+
+void DestroyTag(void *tag);
+
+/* Wrapper class for grpc_call structs. */
+class Call : public Nan::ObjectWrap {
+ public:
+  static void Init(v8::Local<v8::Object> exports);
+  static bool HasInstance(v8::Local<v8::Value> val);
+  /* Wrap a grpc_call struct in a javascript object */
+  static v8::Local<v8::Value> WrapStruct(grpc_call *call);
+
+ private:
+  explicit Call(grpc_call *call);
+  ~Call();
+
+  // Prevent copying
+  Call(const Call &);
+  Call &operator=(const Call &);
+
+  static NAN_METHOD(New);
+  static NAN_METHOD(StartBatch);
+  static NAN_METHOD(Cancel);
+  static NAN_METHOD(CancelWithStatus);
+  static NAN_METHOD(GetPeer);
+  static NAN_METHOD(SetCredentials);
+  static Nan::Callback *constructor;
+  // Used for typechecking instances of this javascript class
+  static Nan::Persistent<v8::FunctionTemplate> fun_tpl;
+
+  grpc_call *wrapped_call;
+};
+
+}  // namespace node
+}  // namespace grpc
+
+#endif  // NET_GRPC_NODE_CALL_H_