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// 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/lib/scoped_interface_endpoint_handle.h"
namespace mojo {
namespace internal {
class AssociatedInterfacePtrInfoHelper;
}
// 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 {
DISALLOW_COPY_AND_ASSIGN_WITH_MOVE_FOR_BIND(AssociatedInterfacePtrInfo);
public:
AssociatedInterfacePtrInfo() : version_(0u) {}
AssociatedInterfacePtrInfo(AssociatedInterfacePtrInfo&& other)
: handle_(std::move(other.handle_)), version_(other.version_) {
other.version_ = 0u;
}
~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(); }
uint32_t version() const { return version_; }
void set_version(uint32_t version) { version_ = version; }
private:
friend class internal::AssociatedInterfacePtrInfoHelper;
internal::ScopedInterfaceEndpointHandle handle_;
uint32_t version_;
};
namespace internal {
// With this helper, AssociatedInterfacePtrInfo doesn't have to expose any
// operations related to ScopedInterfaceEndpointHandle, which is an internal
// class.
class AssociatedInterfacePtrInfoHelper {
public:
template <typename Interface>
static ScopedInterfaceEndpointHandle PassHandle(
AssociatedInterfacePtrInfo<Interface>* info) {
return std::move(info->handle_);
}
template <typename Interface>
static const ScopedInterfaceEndpointHandle& GetHandle(
AssociatedInterfacePtrInfo<Interface>* info) {
return info->handle_;
}
template <typename Interface>
static void SetHandle(AssociatedInterfacePtrInfo<Interface>* info,
ScopedInterfaceEndpointHandle handle) {
info->handle_ = std::move(handle);
}
};
} // namespace internal
} // namespace mojo
#endif // MOJO_PUBLIC_CPP_BINDINGS_ASSOCIATED_INTERFACE_PTR_INFO_H_
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