1 files changed, 67 insertions, 0 deletions
diff --git a/src/core/ext/transport/chttp2/transport/context_list.cc b/src/core/ext/transport/chttp2/transport/context_list.cc
new file mode 100644
index 0000000000..df09809067
--- /dev/null
+++ b/src/core/ext/transport/chttp2/transport/context_list.cc
@@ -0,0 +1,67 @@
+/*
+ *
+ * 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.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#include "src/core/ext/transport/chttp2/transport/context_list.h"
+
+namespace {
+void (*write_timestamps_callback_g)(void*, grpc_core::Timestamps*,
+                                    grpc_error* error) = nullptr;
+void* (*get_copied_context_fn_g)(void*) = nullptr;
+}  // namespace
+
+namespace grpc_core {
+void ContextList::Append(ContextList** head, grpc_chttp2_stream* s) {
+  if (get_copied_context_fn_g == nullptr ||
+      write_timestamps_callback_g == nullptr) {
+    return;
+  }
+  /* Create a new element in the list and add it at the front */
+  ContextList* elem = grpc_core::New<ContextList>();
+  elem->trace_context_ = get_copied_context_fn_g(s->context);
+  elem->byte_offset_ = s->byte_counter;
+  elem->next_ = *head;
+  *head = elem;
+}
+
+void ContextList::Execute(void* arg, grpc_core::Timestamps* ts,
+                          grpc_error* error) {
+  ContextList* head = static_cast<ContextList*>(arg);
+  ContextList* to_be_freed;
+  while (head != nullptr) {
+    if (write_timestamps_callback_g) {
+      ts->byte_offset = static_cast<uint32_t>(head->byte_offset_);
+      write_timestamps_callback_g(head->trace_context_, ts, error);
+    }
+    to_be_freed = head;
+    head = head->next_;
+    grpc_core::Delete(to_be_freed);
+  }
+}
+
+void grpc_http2_set_write_timestamps_callback(void (*fn)(void*,
+                                                         grpc_core::Timestamps*,
+                                                         grpc_error* error)) {
+  write_timestamps_callback_g = fn;
+}
+
+void grpc_http2_set_fn_get_copied_context(void* (*fn)(void*)) {
+  get_copied_context_fn_g = fn;
+}
+} /* namespace grpc_core */