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1 // Copyright 2014 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 THIRD_PARTY_MOJO_SRC_MOJO_EDK_EMBEDDER_SCOPED_PLATFORM_HANDLE_H_ | |
6 #define THIRD_PARTY_MOJO_SRC_MOJO_EDK_EMBEDDER_SCOPED_PLATFORM_HANDLE_H_ | |
7 | |
8 #include "base/move.h" | |
9 #include "mojo/public/c/system/macros.h" | |
10 #include "third_party/mojo/src/mojo/edk/embedder/platform_handle.h" | |
11 #include "third_party/mojo/src/mojo/edk/system/system_impl_export.h" | |
12 | |
13 namespace mojo { | |
14 namespace embedder { | |
15 | |
16 class MOJO_SYSTEM_IMPL_EXPORT ScopedPlatformHandle { | |
17 DISALLOW_COPY_AND_ASSIGN_WITH_MOVE_FOR_BIND(ScopedPlatformHandle) | |
18 | |
19 public: | |
20 ScopedPlatformHandle() {} | |
21 explicit ScopedPlatformHandle(PlatformHandle handle) : handle_(handle) {} | |
22 ~ScopedPlatformHandle() { handle_.CloseIfNecessary(); } | |
23 | |
24 // Move-only constructor and operator=. | |
25 ScopedPlatformHandle(ScopedPlatformHandle&& other) | |
26 : handle_(other.release()) {} | |
27 | |
28 ScopedPlatformHandle& operator=(ScopedPlatformHandle&& other) { | |
29 if (this != &other) | |
30 handle_ = other.release(); | |
31 return *this; | |
32 } | |
33 | |
34 const PlatformHandle& get() const { return handle_; } | |
35 | |
36 void swap(ScopedPlatformHandle& other) { | |
37 PlatformHandle temp = handle_; | |
38 handle_ = other.handle_; | |
39 other.handle_ = temp; | |
40 } | |
41 | |
42 PlatformHandle release() MOJO_WARN_UNUSED_RESULT { | |
43 PlatformHandle rv = handle_; | |
44 handle_ = PlatformHandle(); | |
45 return rv; | |
46 } | |
47 | |
48 void reset(PlatformHandle handle = PlatformHandle()) { | |
49 handle_.CloseIfNecessary(); | |
50 handle_ = handle; | |
51 } | |
52 | |
53 bool is_valid() const { return handle_.is_valid(); } | |
54 | |
55 private: | |
56 PlatformHandle handle_; | |
57 }; | |
58 | |
59 } // namespace embedder | |
60 } // namespace mojo | |
61 | |
62 #endif // THIRD_PARTY_MOJO_SRC_MOJO_EDK_EMBEDDER_SCOPED_PLATFORM_HANDLE_H_ | |
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