1 files changed, 111 insertions, 0 deletions
diff --git a/src/core/ext/client_channel/proxy_mapper_registry.c b/src/core/ext/client_channel/proxy_mapper_registry.c
new file mode 100644
index 0000000000..0a156c8b1c
--- /dev/null
+++ b/src/core/ext/client_channel/proxy_mapper_registry.c
@@ -0,0 +1,111 @@
+/*
+ *
+ * Copyright 2017, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/ext/client_channel/proxy_mapper_registry.h"
+
+#include <string.h>
+
+#include <grpc/support/alloc.h>
+
+//
+// grpc_proxy_mapper_list
+//
+
+typedef struct {
+  grpc_proxy_mapper** list;
+  size_t num_mappers;
+} grpc_proxy_mapper_list;
+
+static void grpc_proxy_mapper_list_register(grpc_proxy_mapper_list* list,
+                                            bool at_start,
+                                            grpc_proxy_mapper* mapper) {
+  list->list = gpr_realloc(
+      list->list, (list->num_mappers + 1) * sizeof(grpc_proxy_mapper*));
+  if (at_start) {
+    memmove(list->list + 1, list->list,
+            sizeof(grpc_proxy_mapper*) * list->num_mappers);
+    list->list[0] = mapper;
+  } else {
+    list->list[list->num_mappers] = mapper;
+  }
+  ++list->num_mappers;
+}
+
+static bool grpc_proxy_mapper_list_map(grpc_exec_ctx* exec_ctx,
+                                       grpc_proxy_mapper_list* list,
+                                       const grpc_resolved_address* address,
+                                       const grpc_channel_args* args,
+                                       grpc_resolved_address** new_address,
+                                       grpc_channel_args** new_args) {
+  for (size_t i = 0; i < list->num_mappers; ++i) {
+    if (grpc_proxy_mapper_map(exec_ctx, list->list[i], address, args,
+                              new_address, new_args)) {
+      return true;
+    }
+  }
+  return false;
+}
+
+static void grpc_proxy_mapper_list_destroy(grpc_proxy_mapper_list* list) {
+  for (size_t i = 0; i < list->num_mappers; ++i) {
+    grpc_proxy_mapper_destroy(list->list[i]);
+  }
+  gpr_free(list->list);
+}
+
+//
+// plugin
+//
+
+static grpc_proxy_mapper_list g_proxy_mapper_list;
+
+void grpc_proxy_mapper_registry_init() {
+  memset(&g_proxy_mapper_list, 0, sizeof(g_proxy_mapper_list));
+}
+
+void grpc_proxy_mapper_registry_shutdown() {
+  grpc_proxy_mapper_list_destroy(&g_proxy_mapper_list);
+}
+
+void grpc_proxy_mapper_register(bool at_start, grpc_proxy_mapper* mapper) {
+  grpc_proxy_mapper_list_register(&g_proxy_mapper_list, at_start, mapper);
+}
+
+bool grpc_proxy_mappers_map(grpc_exec_ctx* exec_ctx,
+                            const grpc_resolved_address* address,
+                            const grpc_channel_args* args,
+                            grpc_resolved_address** new_address,
+                            grpc_channel_args** new_args) {
+  return grpc_proxy_mapper_list_map(exec_ctx, &g_proxy_mapper_list, address,
+                                    args, new_address, new_args);
+}