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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 MOJO_SYSTEM_SCOPED_PLATFORM_HANDLE_H_ |
| 6 #define MOJO_SYSTEM_SCOPED_PLATFORM_HANDLE_H_ |
| 7 |
| 8 #include "base/compiler_specific.h" |
| 9 #include "base/move.h" |
| 10 #include "mojo/system/platform_handle.h" |
| 11 #include "mojo/system/system_impl_export.h" |
| 12 |
| 13 namespace mojo { |
| 14 namespace system { |
| 15 |
| 16 class MOJO_SYSTEM_IMPL_EXPORT ScopedPlatformHandle { |
| 17 MOVE_ONLY_TYPE_FOR_CPP_03(ScopedPlatformHandle, RValue); |
| 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(RValue other) : handle_(other.object->release()) {} |
| 26 ScopedPlatformHandle& operator=(RValue other) { |
| 27 handle_ = other.object->release(); |
| 28 return *this; |
| 29 } |
| 30 |
| 31 const PlatformHandle& get() const { return handle_; } |
| 32 |
| 33 void swap(ScopedPlatformHandle& other) { |
| 34 PlatformHandle temp = handle_; |
| 35 handle_ = other.handle_; |
| 36 other.handle_ = temp; |
| 37 } |
| 38 |
| 39 PlatformHandle release() WARN_UNUSED_RESULT { |
| 40 PlatformHandle rv = handle_; |
| 41 handle_ = PlatformHandle(); |
| 42 return rv; |
| 43 } |
| 44 |
| 45 void reset(PlatformHandle handle = PlatformHandle()) { |
| 46 handle_.CloseIfNecessary(); |
| 47 handle_ = handle; |
| 48 } |
| 49 |
| 50 bool is_valid() const { |
| 51 return handle_.is_valid(); |
| 52 } |
| 53 |
| 54 private: |
| 55 PlatformHandle handle_; |
| 56 }; |
| 57 |
| 58 } // namespace system |
| 59 } // namespace mojo |
| 60 |
| 61 #endif // MOJO_SYSTEM_SCOPED_PLATFORM_HANDLE_H_ |
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