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1 // Copyright 2015 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 
5 #ifndef MOJO_PUBLIC_CPP_BINDINGS_INTERFACE_PTR_INFO_H_
6 #define MOJO_PUBLIC_CPP_BINDINGS_INTERFACE_PTR_INFO_H_
7 
8 #include <stdint.h>
9 #include <utility>
10 
11 #include "base/macros.h"
12 #include "mojo/public/cpp/system/message_pipe.h"
13 
14 namespace mojo {
15 
16 // InterfacePtrInfo stores necessary information to communicate with a remote
17 // interface implementation, which could be used to construct an InterfacePtr.
18 template <typename Interface>
19 class InterfacePtrInfo {
20  public:
InterfacePtrInfo()21   InterfacePtrInfo() : version_(0u) {}
22 
InterfacePtrInfo(ScopedMessagePipeHandle handle,uint32_t version)23   InterfacePtrInfo(ScopedMessagePipeHandle handle, uint32_t version)
24       : handle_(std::move(handle)), version_(version) {}
25 
InterfacePtrInfo(InterfacePtrInfo && other)26   InterfacePtrInfo(InterfacePtrInfo&& other)
27       : handle_(std::move(other.handle_)), version_(other.version_) {
28     other.version_ = 0u;
29   }
30 
~InterfacePtrInfo()31   ~InterfacePtrInfo() {}
32 
33   InterfacePtrInfo& operator=(InterfacePtrInfo&& other) {
34     if (this != &other) {
35       handle_ = std::move(other.handle_);
36       version_ = other.version_;
37       other.version_ = 0u;
38     }
39 
40     return *this;
41   }
42 
is_valid()43   bool is_valid() const { return handle_.is_valid(); }
44 
PassHandle()45   ScopedMessagePipeHandle PassHandle() { return std::move(handle_); }
handle()46   const ScopedMessagePipeHandle& handle() const { return handle_; }
set_handle(ScopedMessagePipeHandle handle)47   void set_handle(ScopedMessagePipeHandle handle) {
48     handle_ = std::move(handle);
49   }
50 
version()51   uint32_t version() const { return version_; }
set_version(uint32_t version)52   void set_version(uint32_t version) { version_ = version; }
53 
54  private:
55   ScopedMessagePipeHandle handle_;
56   uint32_t version_;
57 
58   DISALLOW_COPY_AND_ASSIGN(InterfacePtrInfo);
59 };
60 
61 }  // namespace mojo
62 
63 #endif  // MOJO_PUBLIC_CPP_BINDINGS_INTERFACE_PTR_INFO_H_
64