| // Copyright 2013 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "mojo/public/cpp/bindings/lib/bindings_serialization.h" |
| |
| #include "mojo/public/cpp/environment/logging.h" |
| |
| namespace mojo { |
| namespace internal { |
| |
| namespace { |
| |
| const size_t kAlignment = 8; |
| |
| template <typename T> |
| T AlignImpl(T t) { |
| return t + (kAlignment - (t % kAlignment)) % kAlignment; |
| } |
| |
| } // namespace |
| |
| size_t Align(size_t size) { |
| return AlignImpl(size); |
| } |
| |
| char* AlignPointer(char* ptr) { |
| return reinterpret_cast<char*>(AlignImpl(reinterpret_cast<uintptr_t>(ptr))); |
| } |
| |
| bool IsAligned(const void* ptr) { |
| return !(reinterpret_cast<uintptr_t>(ptr) % kAlignment); |
| } |
| |
| void EncodePointer(const void* ptr, uint64_t* offset) { |
| if (!ptr) { |
| *offset = 0; |
| return; |
| } |
| |
| const char* p_obj = reinterpret_cast<const char*>(ptr); |
| const char* p_slot = reinterpret_cast<const char*>(offset); |
| MOJO_DCHECK(p_obj > p_slot); |
| |
| *offset = static_cast<uint64_t>(p_obj - p_slot); |
| } |
| |
| const void* DecodePointerRaw(const uint64_t* offset) { |
| if (!*offset) |
| return nullptr; |
| return reinterpret_cast<const char*>(offset) + *offset; |
| } |
| |
| void EncodeHandle(Handle* handle, std::vector<Handle>* handles) { |
| if (handle->is_valid()) { |
| handles->push_back(*handle); |
| handle->set_value(static_cast<MojoHandle>(handles->size() - 1)); |
| } else { |
| handle->set_value(kEncodedInvalidHandleValue); |
| } |
| } |
| |
| void EncodeHandle(Interface_Data* data, std::vector<Handle>* handles) { |
| EncodeHandle(&data->handle, handles); |
| } |
| |
| void EncodeHandle(MojoHandle* handle, std::vector<Handle>* handles) { |
| EncodeHandle(reinterpret_cast<Handle*>(handle), handles); |
| } |
| |
| void DecodeHandle(Handle* handle, std::vector<Handle>* handles) { |
| if (handle->value() == kEncodedInvalidHandleValue) { |
| *handle = Handle(); |
| return; |
| } |
| MOJO_DCHECK(handle->value() < handles->size()); |
| // Just leave holes in the vector so we don't screw up other indices. |
| *handle = FetchAndReset(&handles->at(handle->value())); |
| } |
| |
| void DecodeHandle(Interface_Data* data, std::vector<Handle>* handles) { |
| DecodeHandle(&data->handle, handles); |
| } |
| |
| void DecodeHandle(MojoHandle* handle, std::vector<Handle>* handles) { |
| DecodeHandle(reinterpret_cast<Handle*>(handle), handles); |
| } |
| |
| } // namespace internal |
| } // namespace mojo |