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54 lines
1.5 KiB
C++
54 lines
1.5 KiB
C++
/*
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* Copyright 2016 Two Blue Cubes Ltd. All rights reserved.
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*
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* Distributed under the Boost Software License, Version 1.0. (See accompanying
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* file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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*/
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#ifndef CATCH_STRINGDATA_H_INCLUDED
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#define CATCH_STRINGDATA_H_INCLUDED
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#include <atomic>
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#include <cstddef>
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namespace Catch {
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class StringRef;
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class StringData {
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mutable std::atomic<unsigned int> m_refs;
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public:
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size_t size;
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union {
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char chars[1];
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};
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auto isUniquelyOwned() const noexcept -> bool {
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return m_refs == 1;
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}
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static auto getEmpty() -> StringData*;
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static auto create( StringRef const& stringRef ) -> StringData*;
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static auto create( StringRef const& stringRef, size_t capacity ) -> StringData*;
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void addRef() const noexcept {
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if( m_refs > 0 )
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++m_refs;
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}
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void release() const noexcept {
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unsigned int refs = m_refs;
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if( refs > 1 )
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--m_refs;
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else if( refs == 1 )
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delete[] reinterpret_cast<char const*>( this );
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}
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private:
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StringData( unsigned int initialRef = 1 );
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StringData( StringRef const& stringRef, size_t capacity );
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StringData( StringData const& ) = delete;
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StringData& operator=( StringData const& ) = delete;
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};
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} // namespace Catch
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#endif // CATCH_STRINGDATA_H_INCLUDED
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