1 // Copyright 2017 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "mojo/public/cpp/bindings/lib/message_internal.h" 6 7 #include "mojo/public/cpp/bindings/lib/array_internal.h" 8 #include "mojo/public/cpp/bindings/message.h" 9 10 namespace mojo { 11 namespace internal { 12 13 namespace { 14 15 size_t ComputeHeaderSize(uint32_t flags, size_t payload_interface_id_count) { 16 if (payload_interface_id_count > 0) { 17 // Version 2 18 return sizeof(MessageHeaderV2); 19 } else if (flags & 20 (Message::kFlagExpectsResponse | Message::kFlagIsResponse)) { 21 // Version 1 22 return sizeof(MessageHeaderV1); 23 } else { 24 // Version 0 25 return sizeof(MessageHeader); 26 } 27 } 28 29 } // namespace 30 31 size_t ComputeSerializedMessageSize(uint32_t flags, 32 size_t payload_size, 33 size_t payload_interface_id_count) { 34 const size_t header_size = 35 ComputeHeaderSize(flags, payload_interface_id_count); 36 if (payload_interface_id_count > 0) { 37 return Align(header_size + Align(payload_size) + 38 ArrayDataTraits<uint32_t>::GetStorageSize( 39 static_cast<uint32_t>(payload_interface_id_count))); 40 } 41 return internal::Align(header_size + payload_size); 42 } 43 44 } // namespace internal 45 } // namespace mojo 46
