| // Copyright 2016 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/system/buffer.h" |
| |
| namespace mojo { |
| |
| // static |
| ScopedSharedBufferHandle SharedBufferHandle::Create(uint64_t num_bytes) { |
| MojoCreateSharedBufferOptions options = { |
| sizeof(options), MOJO_CREATE_SHARED_BUFFER_OPTIONS_FLAG_NONE}; |
| SharedBufferHandle handle; |
| MojoCreateSharedBuffer(&options, num_bytes, handle.mutable_value()); |
| return MakeScopedHandle(handle); |
| } |
| |
| ScopedSharedBufferHandle SharedBufferHandle::Clone( |
| SharedBufferHandle::AccessMode access_mode) const { |
| ScopedSharedBufferHandle result; |
| if (!is_valid()) |
| return result; |
| |
| MojoDuplicateBufferHandleOptions options = { |
| sizeof(options), MOJO_DUPLICATE_BUFFER_HANDLE_OPTIONS_FLAG_NONE}; |
| if (access_mode == AccessMode::READ_ONLY) |
| options.flags |= MOJO_DUPLICATE_BUFFER_HANDLE_OPTIONS_FLAG_READ_ONLY; |
| SharedBufferHandle result_handle; |
| MojoDuplicateBufferHandle(value(), &options, result_handle.mutable_value()); |
| result.reset(result_handle); |
| return result; |
| } |
| |
| ScopedSharedBufferMapping SharedBufferHandle::Map(uint64_t size) const { |
| return MapAtOffset(size, 0); |
| } |
| |
| ScopedSharedBufferMapping SharedBufferHandle::MapAtOffset( |
| uint64_t size, |
| uint64_t offset) const { |
| void* buffer = nullptr; |
| MojoMapBuffer(value(), offset, size, &buffer, MOJO_MAP_BUFFER_FLAG_NONE); |
| return ScopedSharedBufferMapping(buffer); |
| } |
| |
| } // namespace mojo |