1 files changed, 77 insertions, 0 deletions
diff --git a/src/core/lib/channel/channelz_registry.cc b/src/core/lib/channel/channelz_registry.cc
new file mode 100644
index 0000000000..31d66e847a
--- /dev/null
+++ b/src/core/lib/channel/channelz_registry.cc
@@ -0,0 +1,77 @@
+/*
+ *
+ * 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/channel/channel_trace.h"
+#include "src/core/lib/channel/channelz_registry.h"
+#include "src/core/lib/gpr/useful.h"
+#include "src/core/lib/gprpp/memory.h"
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+
+namespace grpc_core {
+namespace {
+
+// singleton instance of the registry.
+ChannelzRegistry* g_channelz_registry = nullptr;
+
+// avl vtable for uuid (intptr_t) -> channelz_obj (void*)
+// this table is only looking, it does not own anything.
+void destroy_intptr(void* not_used, void* user_data) {}
+void* copy_intptr(void* key, void* user_data) { return key; }
+long compare_intptr(void* key1, void* key2, void* user_data) {
+  return GPR_ICMP(key1, key2);
+}
+
+void destroy_channelz_obj(void* channelz_obj, void* user_data) {}
+void* copy_channelz_obj(void* channelz_obj, void* user_data) {
+  return channelz_obj;
+}
+const grpc_avl_vtable avl_vtable = {destroy_intptr, copy_intptr, compare_intptr,
+                                    destroy_channelz_obj, copy_channelz_obj};
+
+}  // anonymous namespace
+
+void ChannelzRegistry::Init() { g_channelz_registry = New<ChannelzRegistry>(); }
+
+void ChannelzRegistry::Shutdown() { Delete(g_channelz_registry); }
+
+ChannelzRegistry* ChannelzRegistry::Default() {
+  GPR_DEBUG_ASSERT(g_channelz_registry != nullptr);
+  return g_channelz_registry;
+}
+
+ChannelzRegistry::ChannelzRegistry() : uuid_(1) {
+  gpr_mu_init(&mu_);
+  avl_ = grpc_avl_create(&avl_vtable);
+}
+
+ChannelzRegistry::~ChannelzRegistry() {
+  grpc_avl_unref(avl_, nullptr);
+  gpr_mu_destroy(&mu_);
+}
+
+void ChannelzRegistry::InternalUnregister(intptr_t uuid) {
+  gpr_mu_lock(&mu_);
+  avl_ = grpc_avl_remove(avl_, (void*)uuid, nullptr);
+  gpr_mu_unlock(&mu_);
+}
+
+}  // namespace grpc_core