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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.
*
*/
#include "src/core/ext/filters/client_channel/lb_policy/grpclb/grpclb_client_stats.h"
#include <grpc/support/alloc.h>
#include <grpc/support/atm.h>
#include <grpc/support/sync.h>
#include <grpc/support/useful.h>
#include "src/core/lib/channel/channel_args.h"
#define GRPC_ARG_GRPCLB_CLIENT_STATS "grpc.grpclb_client_stats"
struct grpc_grpclb_client_stats {
gpr_refcount refs;
gpr_atm num_calls_started;
gpr_atm num_calls_finished;
gpr_atm num_calls_finished_with_drop_for_rate_limiting;
gpr_atm num_calls_finished_with_drop_for_load_balancing;
gpr_atm num_calls_finished_with_client_failed_to_send;
gpr_atm num_calls_finished_known_received;
};
grpc_grpclb_client_stats* grpc_grpclb_client_stats_create() {
grpc_grpclb_client_stats* client_stats = gpr_zalloc(sizeof(*client_stats));
gpr_ref_init(&client_stats->refs, 1);
return client_stats;
}
grpc_grpclb_client_stats* grpc_grpclb_client_stats_ref(
grpc_grpclb_client_stats* client_stats) {
gpr_ref(&client_stats->refs);
return client_stats;
}
void grpc_grpclb_client_stats_unref(grpc_grpclb_client_stats* client_stats) {
if (gpr_unref(&client_stats->refs)) {
gpr_free(client_stats);
}
}
void grpc_grpclb_client_stats_add_call_started(
grpc_grpclb_client_stats* client_stats) {
gpr_atm_full_fetch_add(&client_stats->num_calls_started, (gpr_atm)1);
}
void grpc_grpclb_client_stats_add_call_finished(
bool finished_with_drop_for_rate_limiting,
bool finished_with_drop_for_load_balancing,
bool finished_with_client_failed_to_send, bool finished_known_received,
grpc_grpclb_client_stats* client_stats) {
gpr_atm_full_fetch_add(&client_stats->num_calls_finished, (gpr_atm)1);
if (finished_with_drop_for_rate_limiting) {
gpr_atm_full_fetch_add(
&client_stats->num_calls_finished_with_drop_for_rate_limiting,
(gpr_atm)1);
}
if (finished_with_drop_for_load_balancing) {
gpr_atm_full_fetch_add(
&client_stats->num_calls_finished_with_drop_for_load_balancing,
(gpr_atm)1);
}
if (finished_with_client_failed_to_send) {
gpr_atm_full_fetch_add(
&client_stats->num_calls_finished_with_client_failed_to_send,
(gpr_atm)1);
}
if (finished_known_received) {
gpr_atm_full_fetch_add(&client_stats->num_calls_finished_known_received,
(gpr_atm)1);
}
}
static void atomic_get_and_reset_counter(int64_t* value, gpr_atm* counter) {
*value = (int64_t)gpr_atm_acq_load(counter);
gpr_atm_full_fetch_add(counter, (gpr_atm)(-*value));
}
void grpc_grpclb_client_stats_get(
grpc_grpclb_client_stats* client_stats, int64_t* num_calls_started,
int64_t* num_calls_finished,
int64_t* num_calls_finished_with_drop_for_rate_limiting,
int64_t* num_calls_finished_with_drop_for_load_balancing,
int64_t* num_calls_finished_with_client_failed_to_send,
int64_t* num_calls_finished_known_received) {
atomic_get_and_reset_counter(num_calls_started,
&client_stats->num_calls_started);
atomic_get_and_reset_counter(num_calls_finished,
&client_stats->num_calls_finished);
atomic_get_and_reset_counter(
num_calls_finished_with_drop_for_rate_limiting,
&client_stats->num_calls_finished_with_drop_for_rate_limiting);
atomic_get_and_reset_counter(
num_calls_finished_with_drop_for_load_balancing,
&client_stats->num_calls_finished_with_drop_for_load_balancing);
atomic_get_and_reset_counter(
num_calls_finished_with_client_failed_to_send,
&client_stats->num_calls_finished_with_client_failed_to_send);
atomic_get_and_reset_counter(
num_calls_finished_known_received,
&client_stats->num_calls_finished_known_received);
}
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