69 lines
1.9 KiB
C++
69 lines
1.9 KiB
C++
// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef MOJO_PUBLIC_CPP_BINDINGS_INTERFACE_PTR_INFO_H_
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#define MOJO_PUBLIC_CPP_BINDINGS_INTERFACE_PTR_INFO_H_
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#include <cstddef>
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#include <cstdint>
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#include <utility>
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#include "base/macros.h"
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#include "mojo/public/cpp/system/message_pipe.h"
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namespace mojo {
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// InterfacePtrInfo stores necessary information to communicate with a remote
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// interface implementation, which could be used to construct an InterfacePtr.
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template <typename Interface>
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class InterfacePtrInfo {
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public:
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InterfacePtrInfo() : version_(0u) {}
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InterfacePtrInfo(std::nullptr_t) : InterfacePtrInfo() {}
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InterfacePtrInfo(ScopedMessagePipeHandle handle, uint32_t version)
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: handle_(std::move(handle)), version_(version) {}
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InterfacePtrInfo(InterfacePtrInfo&& other)
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: handle_(std::move(other.handle_)), version_(other.version_) {
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other.version_ = 0u;
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}
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~InterfacePtrInfo() {}
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InterfacePtrInfo& operator=(InterfacePtrInfo&& other) {
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if (this != &other) {
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handle_ = std::move(other.handle_);
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version_ = other.version_;
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other.version_ = 0u;
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}
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return *this;
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}
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bool is_valid() const { return handle_.is_valid(); }
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ScopedMessagePipeHandle PassHandle() { return std::move(handle_); }
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const ScopedMessagePipeHandle& handle() const { return handle_; }
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void set_handle(ScopedMessagePipeHandle handle) {
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handle_ = std::move(handle);
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}
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uint32_t version() const { return version_; }
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void set_version(uint32_t version) { version_ = version; }
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// Allow InterfacePtrInfo<> to be used in boolean expressions.
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explicit operator bool() const { return handle_.is_valid(); }
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private:
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ScopedMessagePipeHandle handle_;
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uint32_t version_;
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DISALLOW_COPY_AND_ASSIGN(InterfacePtrInfo);
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};
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} // namespace mojo
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#endif // MOJO_PUBLIC_CPP_BINDINGS_INTERFACE_PTR_INFO_H_
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