diff options
Diffstat (limited to 'include/grpc++/impl/codegen/proto_utils.h')
| -rw-r--r-- | include/grpc++/impl/codegen/proto_utils.h | 162 |
1 files changed, 158 insertions, 4 deletions
diff --git a/include/grpc++/impl/codegen/proto_utils.h b/include/grpc++/impl/codegen/proto_utils.h index 2aaa3c3b30..3bad468a74 100644 --- a/include/grpc++/impl/codegen/proto_utils.h +++ b/include/grpc++/impl/codegen/proto_utils.h @@ -41,26 +41,180 @@ #include <grpc++/impl/codegen/serialization_traits.h> #include <grpc++/impl/codegen/status.h> #include <grpc/impl/codegen/byte_buffer.h> +#include <grpc/impl/codegen/byte_buffer_reader.h> #include <grpc/impl/codegen/log.h> +#include <grpc/impl/codegen/slice.h> namespace grpc { extern CoreCodegenInterface* g_core_codegen_interface; +namespace internal { + +const int kGrpcBufferWriterMaxBufferLength = 8192; + +class GrpcBufferWriter GRPC_FINAL + : public ::grpc::protobuf::io::ZeroCopyOutputStream { + public: + explicit GrpcBufferWriter(grpc_byte_buffer** bp, int block_size) + : block_size_(block_size), byte_count_(0), have_backup_(false) { + *bp = g_core_codegen_interface->grpc_raw_byte_buffer_create(NULL, 0); + slice_buffer_ = &(*bp)->data.raw.slice_buffer; + } + + ~GrpcBufferWriter() GRPC_OVERRIDE { + if (have_backup_) { + g_core_codegen_interface->gpr_slice_unref(backup_slice_); + } + } + + bool Next(void** data, int* size) GRPC_OVERRIDE { + if (have_backup_) { + slice_ = backup_slice_; + have_backup_ = false; + } else { + slice_ = g_core_codegen_interface->gpr_slice_malloc(block_size_); + } + *data = GPR_SLICE_START_PTR(slice_); + // On win x64, int is only 32bit + GPR_CODEGEN_ASSERT(GPR_SLICE_LENGTH(slice_) <= INT_MAX); + byte_count_ += * size = (int)GPR_SLICE_LENGTH(slice_); + g_core_codegen_interface->gpr_slice_buffer_add(slice_buffer_, slice_); + return true; + } + + void BackUp(int count) GRPC_OVERRIDE { + g_core_codegen_interface->gpr_slice_buffer_pop(slice_buffer_); + if (count == block_size_) { + backup_slice_ = slice_; + } else { + backup_slice_ = g_core_codegen_interface->gpr_slice_split_tail( + &slice_, GPR_SLICE_LENGTH(slice_) - count); + g_core_codegen_interface->gpr_slice_buffer_add(slice_buffer_, slice_); + } + have_backup_ = true; + byte_count_ -= count; + } + + grpc::protobuf::int64 ByteCount() const GRPC_OVERRIDE { return byte_count_; } + + private: + const int block_size_; + int64_t byte_count_; + gpr_slice_buffer* slice_buffer_; + bool have_backup_; + gpr_slice backup_slice_; + gpr_slice slice_; +}; + +class GrpcBufferReader GRPC_FINAL + : public ::grpc::protobuf::io::ZeroCopyInputStream { + public: + explicit GrpcBufferReader(grpc_byte_buffer* buffer) + : byte_count_(0), backup_count_(0) { + g_core_codegen_interface->grpc_byte_buffer_reader_init(&reader_, buffer); + } + ~GrpcBufferReader() GRPC_OVERRIDE { + g_core_codegen_interface->grpc_byte_buffer_reader_destroy(&reader_); + } + + bool Next(const void** data, int* size) GRPC_OVERRIDE { + if (backup_count_ > 0) { + *data = GPR_SLICE_START_PTR(slice_) + GPR_SLICE_LENGTH(slice_) - + backup_count_; + GPR_CODEGEN_ASSERT(backup_count_ <= INT_MAX); + *size = (int)backup_count_; + backup_count_ = 0; + return true; + } + if (!g_core_codegen_interface->grpc_byte_buffer_reader_next(&reader_, + &slice_)) { + return false; + } + g_core_codegen_interface->gpr_slice_unref(slice_); + *data = GPR_SLICE_START_PTR(slice_); + // On win x64, int is only 32bit + GPR_CODEGEN_ASSERT(GPR_SLICE_LENGTH(slice_) <= INT_MAX); + byte_count_ += * size = (int)GPR_SLICE_LENGTH(slice_); + return true; + } + + void BackUp(int count) GRPC_OVERRIDE { backup_count_ = count; } + + bool Skip(int count) GRPC_OVERRIDE { + const void* data; + int size; + while (Next(&data, &size)) { + if (size >= count) { + BackUp(size - count); + return true; + } + // size < count; + count -= size; + } + // error or we have too large count; + return false; + } + + grpc::protobuf::int64 ByteCount() const GRPC_OVERRIDE { + return byte_count_ - backup_count_; + } + + private: + int64_t byte_count_; + int64_t backup_count_; + grpc_byte_buffer_reader reader_; + gpr_slice slice_; +}; +} // namespace internal + template <class T> class SerializationTraits<T, typename std::enable_if<std::is_base_of< grpc::protobuf::Message, T>::value>::type> { public: static Status Serialize(const grpc::protobuf::Message& msg, - grpc_byte_buffer** buffer, bool* own_buffer) { + grpc_byte_buffer** bp, bool* own_buffer) { *own_buffer = true; - return g_core_codegen_interface->SerializeProto(msg, buffer); + int byte_size = msg.ByteSize(); + if (byte_size <= internal::kGrpcBufferWriterMaxBufferLength) { + gpr_slice slice = g_core_codegen_interface->gpr_slice_malloc(byte_size); + GPR_CODEGEN_ASSERT( + GPR_SLICE_END_PTR(slice) == + msg.SerializeWithCachedSizesToArray(GPR_SLICE_START_PTR(slice))); + *bp = g_core_codegen_interface->grpc_raw_byte_buffer_create(&slice, 1); + g_core_codegen_interface->gpr_slice_unref(slice); + return g_core_codegen_interface->ok(); + } else { + internal::GrpcBufferWriter writer( + bp, internal::kGrpcBufferWriterMaxBufferLength); + return msg.SerializeToZeroCopyStream(&writer) + ? g_core_codegen_interface->ok() + : Status(StatusCode::INTERNAL, "Failed to serialize message"); + } } + static Status Deserialize(grpc_byte_buffer* buffer, grpc::protobuf::Message* msg, int max_message_size) { - return g_core_codegen_interface->DeserializeProto(buffer, msg, - max_message_size); + if (buffer == nullptr) { + return Status(StatusCode::INTERNAL, "No payload"); + } + Status result = g_core_codegen_interface->ok(); + { + internal::GrpcBufferReader reader(buffer); + ::grpc::protobuf::io::CodedInputStream decoder(&reader); + if (max_message_size > 0) { + decoder.SetTotalBytesLimit(max_message_size, max_message_size); + } + if (!msg->ParseFromCodedStream(&decoder)) { + result = Status(StatusCode::INTERNAL, msg->InitializationErrorString()); + } + if (!decoder.ConsumedEntireMessage()) { + result = Status(StatusCode::INTERNAL, "Did not read entire message"); + } + } + g_core_codegen_interface->grpc_byte_buffer_destroy(buffer); + return result; } }; |