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/*
*
* 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 GRPC_CORE_LIB_DEBUG_STATS_H
#define GRPC_CORE_LIB_DEBUG_STATS_H
#include <grpc/support/port_platform.h>
#include <grpc/support/atm.h>
#include "src/core/lib/debug/stats_data.h"
#include "src/core/lib/iomgr/exec_ctx.h"
typedef struct grpc_stats_data {
gpr_atm counters[GRPC_STATS_COUNTER_COUNT];
gpr_atm histograms[GRPC_STATS_HISTOGRAM_BUCKETS];
} grpc_stats_data;
extern grpc_stats_data* grpc_stats_per_cpu_storage;
#define GRPC_THREAD_STATS_DATA() \
(&grpc_stats_per_cpu_storage[grpc_core::ExecCtx::Get()->starting_cpu()])
/* Only collect stats if GRPC_COLLECT_STATS is defined or it is a debug build.
*/
#if defined(GRPC_COLLECT_STATS) || !defined(NDEBUG)
#define GRPC_STATS_INC_COUNTER(ctr) \
(gpr_atm_no_barrier_fetch_add(&GRPC_THREAD_STATS_DATA()->counters[(ctr)], 1))
#define GRPC_STATS_INC_HISTOGRAM(histogram, index) \
(gpr_atm_no_barrier_fetch_add( \
&GRPC_THREAD_STATS_DATA()->histograms[histogram##_FIRST_SLOT + (index)], \
1))
#else /* defined(GRPC_COLLECT_STATS) || !defined(NDEBUG) */
#define GRPC_STATS_INC_COUNTER(ctr)
#define GRPC_STATS_INC_HISTOGRAM(histogram, index)
#endif /* defined(GRPC_COLLECT_STATS) || !defined(NDEBUG) */
void grpc_stats_init(void);
void grpc_stats_shutdown(void);
void grpc_stats_collect(grpc_stats_data* output);
// c = b-a
void grpc_stats_diff(const grpc_stats_data* b, const grpc_stats_data* a,
grpc_stats_data* c);
char* grpc_stats_data_as_json(const grpc_stats_data* data);
int grpc_stats_histo_find_bucket_slow(int value, const int* table,
int table_size);
double grpc_stats_histo_percentile(const grpc_stats_data* data,
grpc_stats_histograms histogram,
double percentile);
size_t grpc_stats_histo_count(const grpc_stats_data* data,
grpc_stats_histograms histogram);
#endif
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