1 files changed, 53 insertions, 0 deletions
diff --git a/src/core/ext/transport/chttp2/transport/context_list.h b/src/core/ext/transport/chttp2/transport/context_list.h
new file mode 100644
index 0000000000..5b9d2ab378
--- /dev/null
+++ b/src/core/ext/transport/chttp2/transport/context_list.h
@@ -0,0 +1,53 @@
+/*
+ *
+ * Copyright 2018 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_EXT_TRANSPORT_CHTTP2_TRANSPORT_CONTEXT_LIST_H
+#define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_CONTEXT_LIST_H
+
+#include <grpc/support/port_platform.h>
+
+#include "src/core/lib/iomgr/buffer_list.h"
+
+#include "src/core/ext/transport/chttp2/transport/internal.h"
+
+namespace grpc_core {
+/** A list of RPC Contexts */
+class ContextList {
+ public:
+  /* Creates a new element with \a context as the value and appends it to the
+   * list. */
+  static void Append(ContextList** head, grpc_chttp2_stream* s);
+
+  /* Executes a function \a fn with each context in the list and \a ts. It also
+   * frees up the entire list after this operation. It is intended as a callback
+   * and hence does not take a ref on \a error */
+  static void Execute(void* arg, grpc_core::Timestamps* ts, grpc_error* error);
+
+ private:
+  void* trace_context_ = nullptr;
+  ContextList* next_ = nullptr;
+  size_t byte_offset_ = 0;
+};
+
+void grpc_http2_set_write_timestamps_callback(void (*fn)(void*,
+                                                         grpc_core::Timestamps*,
+                                                         grpc_error* error));
+void grpc_http2_set_fn_get_copied_context(void* (*fn)(void*));
+} /* namespace grpc_core */
+
+#endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_CONTEXT_LIST_H */