1 /* 2 * 3 * Copyright 2015 gRPC authors. 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 */ 18 19 #ifndef GRPC_SUPPORT_HISTOGRAM_H 20 #define GRPC_SUPPORT_HISTOGRAM_H 21 22 #include <grpc/support/port_platform.h> 23 #include <stddef.h> 24 25 #ifdef __cplusplus 26 extern "C" { 27 #endif 28 29 typedef struct grpc_histogram grpc_histogram; 30 31 grpc_histogram* grpc_histogram_create(double resolution, 32 double max_bucket_start); 33 void grpc_histogram_destroy(grpc_histogram* h); 34 void grpc_histogram_add(grpc_histogram* h, double x); 35 36 /** The following merges the second histogram into the first. It only works 37 if they have the same buckets and resolution. Returns 0 on failure, 1 38 on success */ 39 int grpc_histogram_merge(grpc_histogram* dst, const grpc_histogram* src); 40 41 double grpc_histogram_percentile(grpc_histogram* histogram, double percentile); 42 double grpc_histogram_mean(grpc_histogram* histogram); 43 double grpc_histogram_stddev(grpc_histogram* histogram); 44 double grpc_histogram_variance(grpc_histogram* histogram); 45 double grpc_histogram_maximum(grpc_histogram* histogram); 46 double grpc_histogram_minimum(grpc_histogram* histogram); 47 double grpc_histogram_count(grpc_histogram* histogram); 48 double grpc_histogram_sum(grpc_histogram* histogram); 49 double grpc_histogram_sum_of_squares(grpc_histogram* histogram); 50 51 const uint32_t* grpc_histogram_get_contents(grpc_histogram* histogram, 52 size_t* count); 53 void grpc_histogram_merge_contents(grpc_histogram* histogram, 54 const uint32_t* data, size_t data_count, 55 double min_seen, double max_seen, double sum, 56 double sum_of_squares, double count); 57 58 #ifdef __cplusplus 59 } 60 #endif 61 62 #endif /* GRPC_SUPPORT_HISTOGRAM_H */ 63