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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_EDK_EMBEDDER_SCOPED_PLATFORM_HANDLE_H_ | |
| 6 #define MOJO_EDK_EMBEDDER_SCOPED_PLATFORM_HANDLE_H_ | |
| 7 | |
| 8 #include "base/compiler_specific.h" | |
| 9 #include "base/move.h" | |
| 10 #include "mojo/edk/embedder/platform_handle.h" | |
| 11 #include "mojo/edk/system/system_impl_export.h" | |
| 12 | |
| 13 namespace mojo { | |
| 14 namespace embedder { | |
| 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 { return handle_.is_valid(); } | |
| 51 | |
| 52 private: | |
| 53 PlatformHandle handle_; | |
| 54 }; | |
| 55 | |
| 56 } // namespace embedder | |
| 57 } // namespace mojo | |
| 58 | |
| 59 #endif // MOJO_EDK_EMBEDDER_SCOPED_PLATFORM_HANDLE_H_ | |
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