| // 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_ASSOCIATED_INTERFACE_PTR_INFO_H_ |
| #define MOJO_PUBLIC_CPP_BINDINGS_ASSOCIATED_INTERFACE_PTR_INFO_H_ |
| |
| #include <stdint.h> |
| #include <utility> |
| |
| #include "base/macros.h" |
| #include "mojo/public/cpp/bindings/scoped_interface_endpoint_handle.h" |
| |
| namespace mojo { |
| |
| // AssociatedInterfacePtrInfo stores necessary information to construct an |
| // associated interface pointer. It is similar to InterfacePtrInfo except that |
| // it doesn't own a message pipe handle. |
| template <typename Interface> |
| class AssociatedInterfacePtrInfo { |
| public: |
| AssociatedInterfacePtrInfo() : version_(0u) {} |
| AssociatedInterfacePtrInfo(std::nullptr_t) : version_(0u) {} |
| |
| AssociatedInterfacePtrInfo(AssociatedInterfacePtrInfo&& other) |
| : handle_(std::move(other.handle_)), version_(other.version_) { |
| other.version_ = 0u; |
| } |
| |
| AssociatedInterfacePtrInfo(ScopedInterfaceEndpointHandle handle, |
| uint32_t version) |
| : handle_(std::move(handle)), version_(version) {} |
| |
| ~AssociatedInterfacePtrInfo() {} |
| |
| AssociatedInterfacePtrInfo& operator=(AssociatedInterfacePtrInfo&& 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(); } |
| |
| explicit operator bool() const { return handle_; } |
| |
| ScopedInterfaceEndpointHandle PassHandle() { |
| return std::move(handle_); |
| } |
| const ScopedInterfaceEndpointHandle& handle() const { return handle_; } |
| void set_handle(ScopedInterfaceEndpointHandle handle) { |
| handle_ = std::move(handle); |
| } |
| |
| uint32_t version() const { return version_; } |
| void set_version(uint32_t version) { version_ = version; } |
| |
| bool Equals(const AssociatedInterfacePtrInfo& other) const { |
| if (this == &other) |
| return true; |
| |
| // Now that the two refer to different objects, they are equivalent if |
| // and only if they are both invalid. |
| return !is_valid() && !other.is_valid(); |
| } |
| |
| private: |
| ScopedInterfaceEndpointHandle handle_; |
| uint32_t version_; |
| |
| DISALLOW_COPY_AND_ASSIGN(AssociatedInterfacePtrInfo); |
| }; |
| |
| } // namespace mojo |
| |
| #endif // MOJO_PUBLIC_CPP_BINDINGS_ASSOCIATED_INTERFACE_PTR_INFO_H_ |