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// Copyright 2014 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_EDK_EMBEDDER_SCOPED_PLATFORM_HANDLE_H_
#define MOJO_EDK_EMBEDDER_SCOPED_PLATFORM_HANDLE_H_
#include "base/compiler_specific.h"
#include "base/move.h"
#include "mojo/edk/embedder/platform_handle.h"
#include "mojo/edk/system/system_impl_export.h"
namespace mojo {
namespace embedder {
class MOJO_SYSTEM_IMPL_EXPORT ScopedPlatformHandle {
MOVE_ONLY_TYPE_FOR_CPP_03(ScopedPlatformHandle, RValue)
public:
ScopedPlatformHandle() {}
explicit ScopedPlatformHandle(PlatformHandle handle) : handle_(handle) {}
~ScopedPlatformHandle() { handle_.CloseIfNecessary(); }
// Move-only constructor and operator=.
ScopedPlatformHandle(RValue other) : handle_(other.object->release()) {}
ScopedPlatformHandle& operator=(RValue other) {
handle_ = other.object->release();
return *this;
}
const PlatformHandle& get() const { return handle_; }
void swap(ScopedPlatformHandle& other) {
PlatformHandle temp = handle_;
handle_ = other.handle_;
other.handle_ = temp;
}
PlatformHandle release() WARN_UNUSED_RESULT {
PlatformHandle rv = handle_;
handle_ = PlatformHandle();
return rv;
}
void reset(PlatformHandle handle = PlatformHandle()) {
handle_.CloseIfNecessary();
handle_ = handle;
}
bool is_valid() const { return handle_.is_valid(); }
private:
PlatformHandle handle_;
};
} // namespace embedder
} // namespace mojo
#endif // MOJO_EDK_EMBEDDER_SCOPED_PLATFORM_HANDLE_H_
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