| /* |
| * |
| * Copyright 2016 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 GRPC_CORE_EXT_CENSUS_TRACE_LABEL_H |
| #define GRPC_CORE_EXT_CENSUS_TRACE_LABEL_H |
| |
| #include "src/core/ext/census/trace_string.h" |
| |
| /* Trace label (key/value pair) stores a label name and the label value. The |
| value can be one of trace_string/int64_t/bool. */ |
| typedef struct trace_label { |
| trace_string key; |
| enum label_type { |
| /* Unknown value for debugging/error purposes */ |
| LABEL_UNKNOWN = 0, |
| /* A string value */ |
| LABEL_STRING = 1, |
| /* An integer value. */ |
| LABEL_INT = 2, |
| /* A boolean value. */ |
| LABEL_BOOL = 3, |
| } value_type; |
| |
| union value { |
| trace_string label_str; |
| int64_t label_int; |
| bool label_bool; |
| } value; |
| } trace_label; |
| |
| #endif /* GRPC_CORE_EXT_CENSUS_TRACE_LABEL_H */ |