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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 <grpc/impl/codegen/port_platform.h>
#include "src/core/lib/avl/avl.h"
#include "src/core/lib/channel/channel_trace.h"
#include "src/core/lib/channel/channel_trace_registry.h"
#include "src/core/lib/gpr/useful.h"
#include <grpc/support/alloc.h>
#include <grpc/support/log.h>
// file global lock and avl.
static gpr_mu g_mu;
static grpc_avl g_avl;
static gpr_atm g_uuid = 0;
// avl vtable for uuid (intptr_t) -> ChannelTrace
// this table is only looking, it does not own anything.
static void destroy_intptr(void* not_used, void* user_data) {}
static void* copy_intptr(void* key, void* user_data) { return key; }
static long compare_intptr(void* key1, void* key2, void* user_data) {
return GPR_ICMP(key1, key2);
}
static void destroy_channel_trace(void* trace, void* user_data) {}
static void* copy_channel_trace(void* trace, void* user_data) { return trace; }
static const grpc_avl_vtable avl_vtable = {
destroy_intptr, copy_intptr, compare_intptr, destroy_channel_trace,
copy_channel_trace};
void grpc_channel_trace_registry_init() {
gpr_mu_init(&g_mu);
g_avl = grpc_avl_create(&avl_vtable);
}
void grpc_channel_trace_registry_shutdown() {
grpc_avl_unref(g_avl, nullptr);
gpr_mu_destroy(&g_mu);
}
intptr_t grpc_channel_trace_registry_register_channel_trace(
grpc_core::ChannelTrace* channel_trace) {
intptr_t prior = gpr_atm_no_barrier_fetch_add(&g_uuid, 1);
gpr_mu_lock(&g_mu);
g_avl = grpc_avl_add(g_avl, (void*)prior, channel_trace, nullptr);
gpr_mu_unlock(&g_mu);
return prior;
}
void grpc_channel_trace_registry_unregister_channel_trace(intptr_t uuid) {
gpr_mu_lock(&g_mu);
g_avl = grpc_avl_remove(g_avl, (void*)uuid, nullptr);
gpr_mu_unlock(&g_mu);
}
grpc_core::ChannelTrace* grpc_channel_trace_registry_get_channel_trace(
intptr_t uuid) {
gpr_mu_lock(&g_mu);
grpc_core::ChannelTrace* ret = static_cast<grpc_core::ChannelTrace*>(
grpc_avl_get(g_avl, (void*)uuid, nullptr));
gpr_mu_unlock(&g_mu);
return ret;
}
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