intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 226 insertions, 0 deletions

diff --git a/contrib/libs/grpc/include/grpcpp/impl/codegen/byte_buffer.h b/contrib/libs/grpc/include/grpcpp/impl/codegen/byte_buffer.h
new file mode 100644
index 00000000000..6e64ec9981e
--- /dev/null
+++ b/contrib/libs/grpc/include/grpcpp/impl/codegen/byte_buffer.h
@@ -0,0 +1,226 @@
+/*
+ *
+ * Copyright 2017 gRPC authors.
+ *
+ * Licensed 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 GRPCPP_IMPL_CODEGEN_BYTE_BUFFER_H
+#define GRPCPP_IMPL_CODEGEN_BYTE_BUFFER_H
+
+#include <grpc/impl/codegen/byte_buffer.h>
+
+#include <grpcpp/impl/codegen/config.h>
+#include <grpcpp/impl/codegen/core_codegen_interface.h>
+#include <grpcpp/impl/codegen/serialization_traits.h>
+#include <grpcpp/impl/codegen/slice.h>
+#include <grpcpp/impl/codegen/status.h>
+
+#include <vector>
+
+namespace grpc {
+
+class ServerInterface;
+class ByteBuffer;
+class ServerInterface;
+
+namespace internal {
+template <class RequestType, class ResponseType>
+class CallbackUnaryHandler;
+template <class RequestType, class ResponseType>
+class CallbackServerStreamingHandler;
+template <class ServiceType, class RequestType, class ResponseType>
+class RpcMethodHandler;
+template <class ServiceType, class RequestType, class ResponseType>
+class ServerStreamingHandler;
+template <::grpc::StatusCode code>
+class ErrorMethodHandler;
+class CallOpSendMessage;
+template <class R>
+class CallOpRecvMessage;
+class CallOpGenericRecvMessage;
+class ExternalConnectionAcceptorImpl;
+template <class R>
+class DeserializeFuncType;
+class GrpcByteBufferPeer;
+
+}  // namespace internal
+/// A sequence of bytes.
+class ByteBuffer final {
+ public:
+  /// Constuct an empty buffer.
+  ByteBuffer() : buffer_(nullptr) {}
+
+  /// Construct buffer from \a slices, of which there are \a nslices.
+  ByteBuffer(const Slice* slices, size_t nslices) {
+    // The following assertions check that the representation of a grpc::Slice
+    // is identical to that of a grpc_slice:  it has a grpc_slice field, and
+    // nothing else.
+    static_assert(std::is_same<decltype(slices[0].slice_), grpc_slice>::value,
+                  "Slice must have same representation as grpc_slice");
+    static_assert(sizeof(Slice) == sizeof(grpc_slice),
+                  "Slice must have same representation as grpc_slice");
+    // The following assertions check that the representation of a ByteBuffer is
+    // identical to grpc_byte_buffer*:  it has a grpc_byte_buffer* field,
+    // and nothing else.
+    static_assert(std::is_same<decltype(buffer_), grpc_byte_buffer*>::value,
+                  "ByteBuffer must have same representation as "
+                  "grpc_byte_buffer*");
+    static_assert(sizeof(ByteBuffer) == sizeof(grpc_byte_buffer*),
+                  "ByteBuffer must have same representation as "
+                  "grpc_byte_buffer*");
+    // The const_cast is legal if grpc_raw_byte_buffer_create() does no more
+    // than its advertised side effect of increasing the reference count of the
+    // slices it processes, and such an increase does not affect the semantics
+    // seen by the caller of this constructor.
+    buffer_ = g_core_codegen_interface->grpc_raw_byte_buffer_create(
+        reinterpret_cast<grpc_slice*>(const_cast<Slice*>(slices)), nslices);
+  }
+
+  /// Constuct a byte buffer by referencing elements of existing buffer
+  /// \a buf. Wrapper of core function grpc_byte_buffer_copy . This is not
+  /// a deep copy; it is just a referencing. As a result, its performance is
+  /// size-independent.
+  ByteBuffer(const ByteBuffer& buf) : buffer_(nullptr) { operator=(buf); }
+
+  ~ByteBuffer() {
+    if (buffer_) {
+      g_core_codegen_interface->grpc_byte_buffer_destroy(buffer_);
+    }
+  }
+
+  /// Wrapper of core function grpc_byte_buffer_copy . This is not
+  /// a deep copy; it is just a referencing. As a result, its performance is
+  /// size-independent.
+  ByteBuffer& operator=(const ByteBuffer& buf) {
+    if (this != &buf) {
+      Clear();  // first remove existing data
+    }
+    if (buf.buffer_) {
+      // then copy
+      buffer_ = g_core_codegen_interface->grpc_byte_buffer_copy(buf.buffer_);
+    }
+    return *this;
+  }
+
+  /// Dump (read) the buffer contents into \a slices.
+  Status Dump(std::vector<Slice>* slices) const;
+
+  /// Remove all data.
+  void Clear() {
+    if (buffer_) {
+      g_core_codegen_interface->grpc_byte_buffer_destroy(buffer_);
+      buffer_ = nullptr;
+    }
+  }
+
+  /// Make a duplicate copy of the internals of this byte
+  /// buffer so that we have our own owned version of it.
+  /// bbuf.Duplicate(); is equivalent to bbuf=bbuf; but is actually readable.
+  /// This is not a deep copy; it is a referencing and its performance
+  /// is size-independent.
+  void Duplicate() {
+    buffer_ = g_core_codegen_interface->grpc_byte_buffer_copy(buffer_);
+  }
+
+  /// Forget underlying byte buffer without destroying
+  /// Use this only for un-owned byte buffers
+  void Release() { buffer_ = nullptr; }
+
+  /// Buffer size in bytes.
+  size_t Length() const {
+    return buffer_ == nullptr
+               ? 0
+               : g_core_codegen_interface->grpc_byte_buffer_length(buffer_);
+  }
+
+  /// Swap the state of *this and *other.
+  void Swap(ByteBuffer* other) {
+    grpc_byte_buffer* tmp = other->buffer_;
+    other->buffer_ = buffer_;
+    buffer_ = tmp;
+  }
+
+  /// Is this ByteBuffer valid?
+  bool Valid() const { return (buffer_ != nullptr); }
+
+ private:
+  friend class SerializationTraits<ByteBuffer, void>;
+  friend class ServerInterface;
+  friend class internal::CallOpSendMessage;
+  template <class R>
+  friend class internal::CallOpRecvMessage;
+  friend class internal::CallOpGenericRecvMessage;
+  template <class ServiceType, class RequestType, class ResponseType>
+  friend class internal::RpcMethodHandler;
+  template <class ServiceType, class RequestType, class ResponseType>
+  friend class internal::ServerStreamingHandler;
+  template <class RequestType, class ResponseType>
+  friend class internal::CallbackUnaryHandler;
+  template <class RequestType, class ResponseType>
+  friend class internal::CallbackServerStreamingHandler;
+  template <StatusCode code>
+  friend class internal::ErrorMethodHandler;
+  template <class R>
+  friend class internal::DeserializeFuncType;
+  friend class ProtoBufferReader;
+  friend class ProtoBufferWriter;
+  friend class internal::GrpcByteBufferPeer;
+  friend class internal::ExternalConnectionAcceptorImpl;
+
+  grpc_byte_buffer* buffer_;
+
+  // takes ownership
+  void set_buffer(grpc_byte_buffer* buf) {
+    if (buffer_) {
+      Clear();
+    }
+    buffer_ = buf;
+  }
+
+  grpc_byte_buffer* c_buffer() { return buffer_; }
+  grpc_byte_buffer** c_buffer_ptr() { return &buffer_; }
+
+  class ByteBufferPointer {
+   public:
+    ByteBufferPointer(const ByteBuffer* b)
+        : bbuf_(const_cast<ByteBuffer*>(b)) {}
+    operator ByteBuffer*() { return bbuf_; }
+    operator grpc_byte_buffer*() { return bbuf_->buffer_; }
+    operator grpc_byte_buffer**() { return &bbuf_->buffer_; }
+
+   private:
+    ByteBuffer* bbuf_;
+  };
+  ByteBufferPointer bbuf_ptr() const { return ByteBufferPointer(this); }
+};
+
+template <>
+class SerializationTraits<ByteBuffer, void> {
+ public:
+  static Status Deserialize(ByteBuffer* byte_buffer, ByteBuffer* dest) {
+    dest->set_buffer(byte_buffer->buffer_);
+    return Status::OK;
+  }
+  static Status Serialize(const ByteBuffer& source, ByteBuffer* buffer,
+                          bool* own_buffer) {
+    *buffer = source;
+    *own_buffer = true;
+    return g_core_codegen_interface->ok();
+  }
+};
+
+}  // namespace grpc
+
+#endif  // GRPCPP_IMPL_CODEGEN_BYTE_BUFFER_H