| // Copyright 2015 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. |
| |
| #ifndef MOJO_PUBLIC_CPP_BINDINGS_INTERFACE_PTR_INFO_H_ |
| #define MOJO_PUBLIC_CPP_BINDINGS_INTERFACE_PTR_INFO_H_ |
| |
| #include <cstddef> |
| #include <cstdint> |
| #include <utility> |
| |
| #include "base/macros.h" |
| #include "mojo/public/cpp/system/message_pipe.h" |
| |
| namespace mojo { |
| |
| // InterfacePtrInfo stores necessary information to communicate with a remote |
| // interface implementation, which could be used to construct an InterfacePtr. |
| template <typename Interface> |
| class InterfacePtrInfo { |
| public: |
| InterfacePtrInfo() : version_(0u) {} |
| InterfacePtrInfo(std::nullptr_t) : InterfacePtrInfo() {} |
| |
| InterfacePtrInfo(ScopedMessagePipeHandle handle, uint32_t version) |
| : handle_(std::move(handle)), version_(version) {} |
| |
| InterfacePtrInfo(InterfacePtrInfo&& other) |
| : handle_(std::move(other.handle_)), version_(other.version_) { |
| other.version_ = 0u; |
| } |
| |
| ~InterfacePtrInfo() {} |
| |
| InterfacePtrInfo& operator=(InterfacePtrInfo&& other) { |
| if (this != &other) { |
| handle_ = std::move(other.handle_); |
| version_ = other.version_; |
| other.version_ = 0u; |
| } |
| |
| return *this; |
| } |
| |
| bool is_valid() const { return handle_.is_valid(); } |
| |
| ScopedMessagePipeHandle PassHandle() { return std::move(handle_); } |
| const ScopedMessagePipeHandle& handle() const { return handle_; } |
| void set_handle(ScopedMessagePipeHandle handle) { |
| handle_ = std::move(handle); |
| } |
| |
| uint32_t version() const { return version_; } |
| void set_version(uint32_t version) { version_ = version; } |
| |
| // Allow InterfacePtrInfo<> to be used in boolean expressions. |
| explicit operator bool() const { return handle_.is_valid(); } |
| |
| private: |
| ScopedMessagePipeHandle handle_; |
| uint32_t version_; |
| |
| DISALLOW_COPY_AND_ASSIGN(InterfacePtrInfo); |
| }; |
| |
| } // namespace mojo |
| |
| #endif // MOJO_PUBLIC_CPP_BINDINGS_INTERFACE_PTR_INFO_H_ |