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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/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_
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