File size: 1,522 Bytes
8ae5fc5 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 | //===--------------------- mutex_destructor.cpp ---------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// Define ~mutex.
//
// On some platforms ~mutex has been made trivial and the definition is only
// provided for ABI compatibility.
//
// In order to avoid ODR violations within libc++ itself, we need to ensure
// that *nothing* sees the non-trivial mutex declaration. For this reason
// we re-declare the entire class in this file instead of using
// _LIBCUDACXX_BUILDING_LIBRARY to change the definition in the headers.
#include "__config"
#include "__threading_support"
#if !defined(_LIBCUDACXX_HAS_NO_THREADS)
#if _LIBCUDACXX_ABI_VERSION == 1 || !defined(_LIBCUDACXX_HAS_TRIVIAL_MUTEX_DESTRUCTION)
#define NEEDS_MUTEX_DESTRUCTOR
#endif
#endif
_LIBCUDACXX_BEGIN_NAMESPACE_STD
#ifdef NEEDS_MUTEX_DESTRUCTOR
class _LIBCUDACXX_TYPE_VIS mutex
{
__libcpp_mutex_t __m_ = _LIBCUDACXX_MUTEX_INITIALIZER;
public:
_LIBCUDACXX_ALWAYS_INLINE _LIBCUDACXX_INLINE_VISIBILITY
constexpr mutex() = default;
mutex(const mutex&) = delete;
mutex& operator=(const mutex&) = delete;
~mutex() noexcept;
};
mutex::~mutex() _NOEXCEPT
{
__libcpp_mutex_destroy(&__m_);
}
#endif // !_LIBCUDACXX_HAS_NO_THREADS
_LIBCUDACXX_END_NAMESPACE_STD
|