After a long break to wait for the atomic spec to settle, this completes the library part of <atomic>. It currently won't even parse as it depends on the existence of the intrinsics specified at http://libcxx.llvm.org/atomic_design_a.html. Everything has been tested using fake intrinsics which have now been removed. As the intrinsics come online, the ATOMIC_* macros will need to be adjusted to reflect which operations are lock-free. These macros will probably need to be #ifdef'd for each supported platform.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@121267 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Howard Hinnant 2010-12-08 17:20:28 +00:00
parent c9f5d9fca6
commit 770d1c4ea7
12 changed files with 413 additions and 264 deletions

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@ -528,142 +528,6 @@ void atomic_signal_fence(memory_order m);
#pragma GCC system_header
//// Begin Temporary Intrinsics ////
template <class _Tp>
inline _LIBCPP_INLINE_VISIBILITY
bool
__atomic_is_lock_free(_Tp)
{
return false;
}
template <class _Tp>
inline _LIBCPP_INLINE_VISIBILITY
_Tp
__atomic_load(const volatile _Tp* __t, int)
{
return *__t;
}
template <class _Tp>
inline _LIBCPP_INLINE_VISIBILITY
void
__atomic_store(volatile _Tp* __t, _Tp __d, int)
{
*__t = __d;
}
template <class _Tp>
inline _LIBCPP_INLINE_VISIBILITY
_Tp
__atomic_exchange(volatile _Tp* __t, _Tp __d, int)
{
_Tp __tmp = *__t;
*__t = __d;
return __tmp;
}
template <class _Tp>
inline _LIBCPP_INLINE_VISIBILITY
bool
__atomic_compare_exchange_strong(volatile _Tp* __o, _Tp* __e, _Tp __d, int, int)
{
if (const_cast<_Tp&>(*__o) == *__e)
{
*__o = __d;
return true;
}
*__e = __d;
return false;
}
template <class _Tp>
inline _LIBCPP_INLINE_VISIBILITY
bool
__atomic_compare_exchange_weak(volatile _Tp* __o, _Tp* __e, _Tp __d, int, int)
{
if (const_cast<_Tp&>(*__o) == *__e)
{
*__o = __d;
return true;
}
*__e = __d;
return false;
}
template <class _Tp>
inline _LIBCPP_INLINE_VISIBILITY
_Tp
__atomic_fetch_add(volatile _Tp* __o, _Tp __op, int)
{
_Tp __tmp = *__o;
*__o += __op;
return __tmp;
}
template <class _Tp>
inline _LIBCPP_INLINE_VISIBILITY
_Tp*
__atomic_fetch_add(_Tp* volatile* __o, ptrdiff_t __op, int)
{
_Tp* __tmp = *__o;
*__o += __op;
return __tmp;
}
template <class _Tp>
inline _LIBCPP_INLINE_VISIBILITY
_Tp
__atomic_fetch_sub(volatile _Tp* __o, _Tp __op, int)
{
_Tp __tmp = *__o;
*__o -= __op;
return __tmp;
}
template <class _Tp>
inline _LIBCPP_INLINE_VISIBILITY
_Tp*
__atomic_fetch_sub(_Tp* volatile* __o, ptrdiff_t __op, int)
{
_Tp* __tmp = *__o;
*__o -= __op;
return __tmp;
}
template <class _Tp>
inline _LIBCPP_INLINE_VISIBILITY
_Tp
__atomic_fetch_and(volatile _Tp* __o, _Tp __op, int)
{
_Tp __tmp = *__o;
*__o &= __op;
return __tmp;
}
template <class _Tp>
inline _LIBCPP_INLINE_VISIBILITY
_Tp
__atomic_fetch_or(volatile _Tp* __o, _Tp __op, int)
{
_Tp __tmp = *__o;
*__o |= __op;
return __tmp;
}
template <class _Tp>
inline _LIBCPP_INLINE_VISIBILITY
_Tp
__atomic_fetch_xor(volatile _Tp* __o, _Tp __op, int)
{
_Tp __tmp = *__o;
*__o ^= __op;
return __tmp;
}
//// End Temporary Intrinsics ////
_LIBCPP_BEGIN_NAMESPACE_STD
typedef enum memory_order
@ -752,9 +616,16 @@ struct __atomic_base // false
__atomic_base() {} // = default;
_LIBCPP_INLINE_VISIBILITY
/*constexpr*/ __atomic_base(_Tp __d) : __a_(__d) {}
#ifndef _LIBCPP_HAS_NO_DELETED_FUNCTIONS
__atomic_base(const __atomic_base&) = delete;
__atomic_base& operator=(const __atomic_base&) = delete;
__atomic_base& operator=(const __atomic_base&) volatile = delete;
#else // _LIBCPP_HAS_NO_DELETED_FUNCTIONS
private:
__atomic_base(const __atomic_base&);
__atomic_base& operator=(const __atomic_base&);
__atomic_base& operator=(const __atomic_base&) volatile;
#endif // _LIBCPP_HAS_NO_DELETED_FUNCTIONS
};
// atomic<Integral>
@ -1467,6 +1338,114 @@ atomic_fetch_xor_explicit(atomic<_Tp>* __o, _Tp __op, memory_order __m)
return __o->fetch_xor(__op, __m);
}
// flag type and operations
typedef struct atomic_flag
{
bool __a_;
_LIBCPP_INLINE_VISIBILITY
bool test_and_set(memory_order __m = memory_order_seq_cst) volatile
{return __atomic_exchange(&__a_, true, __m);}
_LIBCPP_INLINE_VISIBILITY
bool test_and_set(memory_order __m = memory_order_seq_cst)
{return __atomic_exchange(&__a_, true, __m);}
_LIBCPP_INLINE_VISIBILITY
void clear(memory_order __m = memory_order_seq_cst) volatile
{__atomic_store(&__a_, false, __m);}
_LIBCPP_INLINE_VISIBILITY
void clear(memory_order __m = memory_order_seq_cst)
{__atomic_store(&__a_, false, __m);}
_LIBCPP_INLINE_VISIBILITY
atomic_flag() {} // = default;
_LIBCPP_INLINE_VISIBILITY
atomic_flag(bool __b) : __a_(__b) {}
#ifndef _LIBCPP_HAS_NO_DELETED_FUNCTIONS
atomic_flag(const atomic_flag&) = delete;
atomic_flag& operator=(const atomic_flag&) = delete;
atomic_flag& operator=(const atomic_flag&) volatile = delete;
#else // _LIBCPP_HAS_NO_DELETED_FUNCTIONS
private:
atomic_flag(const atomic_flag&);
atomic_flag& operator=(const atomic_flag&);
atomic_flag& operator=(const atomic_flag&) volatile;
#endif // _LIBCPP_HAS_NO_DELETED_FUNCTIONS
} atomic_flag;
inline _LIBCPP_INLINE_VISIBILITY
bool
atomic_flag_test_and_set(volatile atomic_flag* __o)
{
return __o->test_and_set();
}
inline _LIBCPP_INLINE_VISIBILITY
bool
atomic_flag_test_and_set(atomic_flag* __o)
{
return __o->test_and_set();
}
inline _LIBCPP_INLINE_VISIBILITY
bool
atomic_flag_test_and_set_explicit(volatile atomic_flag* __o, memory_order __m)
{
return __o->test_and_set(__m);
}
inline _LIBCPP_INLINE_VISIBILITY
bool
atomic_flag_test_and_set_explicit(atomic_flag* __o, memory_order __m)
{
return __o->test_and_set(__m);
}
inline _LIBCPP_INLINE_VISIBILITY
void
atomic_flag_clear(volatile atomic_flag* __o)
{
__o->clear();
}
inline _LIBCPP_INLINE_VISIBILITY
void
atomic_flag_clear(atomic_flag* __o)
{
__o->clear();
}
inline _LIBCPP_INLINE_VISIBILITY
void
atomic_flag_clear_explicit(volatile atomic_flag* __o, memory_order __m)
{
__o->clear(__m);
}
inline _LIBCPP_INLINE_VISIBILITY
void
atomic_flag_clear_explicit(atomic_flag* __o, memory_order __m)
{
__o->clear(__m);
}
// fences
inline _LIBCPP_INLINE_VISIBILITY
void
atomic_thread_fence(memory_order __m)
{
__atomic_thread_fence(__m);
}
inline _LIBCPP_INLINE_VISIBILITY
void
atomic_signal_fence(memory_order __m)
{
__atomic_signal_fence(__m);
}
// Atomics for standard typedef types
typedef atomic<char> atomic_char;
@ -1509,138 +1488,20 @@ typedef atomic<ptrdiff_t> atomic_ptrdiff_t;
typedef atomic<intmax_t> atomic_intmax_t;
typedef atomic<uintmax_t> atomic_uintmax_t;
/*
// flag type and operations
typedef bool __atomic_flag__;
struct atomic_flag;
bool atomic_flag_test_and_set(volatile atomic_flag*);
bool atomic_flag_test_and_set(atomic_flag*);
bool atomic_flag_test_and_set_explicit(volatile atomic_flag*, memory_order);
bool atomic_flag_test_and_set_explicit(atomic_flag*, memory_order);
void atomic_flag_clear(volatile atomic_flag*);
void atomic_flag_clear(atomic_flag*);
void atomic_flag_clear_explicit(volatile atomic_flag*, memory_order);
void atomic_flag_clear_explicit(atomic_flag*, memory_order);
typedef struct _LIBCPP_VISIBLE atomic_flag
{
__atomic_flag__ __flg_;
_LIBCPP_INLINE_VISIBILITY
bool test_and_set(memory_order __o = memory_order_seq_cst) volatile
{return atomic_flag_test_and_set_explicit(this, __o);}
_LIBCPP_INLINE_VISIBILITY
bool test_and_set(memory_order __o = memory_order_seq_cst)
{return atomic_flag_test_and_set_explicit(this, __o);}
_LIBCPP_INLINE_VISIBILITY
void clear(memory_order __o = memory_order_seq_cst) volatile
{atomic_flag_clear_explicit(this, __o);}
_LIBCPP_INLINE_VISIBILITY
void clear(memory_order __o = memory_order_seq_cst)
{atomic_flag_clear_explicit(this, __o);}
#ifndef _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
atomic_flag() = default;
#else
_LIBCPP_INLINE_VISIBILITY
atomic_flag() {};
#endif
#ifndef _LIBCPP_HAS_NO_DELETED_FUNCTIONS
atomic_flag(const atomic_flag&) = delete;
atomic_flag& operator=(const atomic_flag&) = delete;
atomic_flag& operator=(const atomic_flag&) volatile = delete;
#else
private:
atomic_flag(const atomic_flag&);
atomic_flag& operator=(const atomic_flag&);
atomic_flag& operator=(const atomic_flag&) volatile;
public:
#endif
} atomic_flag;
inline _LIBCPP_INLINE_VISIBILITY
bool
atomic_flag_test_and_set(volatile atomic_flag* __f)
{
return __atomic_exchange(&__f->__flg_, __atomic_flag__(true),
memory_order_seq_cst)
== __atomic_flag__(true);
}
inline _LIBCPP_INLINE_VISIBILITY
bool
atomic_flag_test_and_set(atomic_flag* __f)
{
return atomic_flag_test_and_set(const_cast<volatile atomic_flag*>(__f));
}
inline _LIBCPP_INLINE_VISIBILITY
bool
atomic_flag_test_and_set_explicit(volatile atomic_flag* __f, memory_order __o)
{
return __atomic_exchange(&__f->__flg_, __atomic_flag__(true), __o)
== __atomic_flag__(true);
}
inline _LIBCPP_INLINE_VISIBILITY
bool
atomic_flag_test_and_set_explicit(atomic_flag* __f, memory_order __o)
{
return atomic_flag_test_and_set_explicit(const_cast<volatile atomic_flag*>
(__f), __o);
}
inline _LIBCPP_INLINE_VISIBILITY
void
atomic_flag_clear(volatile atomic_flag* __f)
{
__atomic_store(&__f->__flg_, __atomic_flag__(false), memory_order_seq_cst);
}
inline _LIBCPP_INLINE_VISIBILITY
void
atomic_flag_clear(atomic_flag* __f)
{
atomic_flag_clear(const_cast<volatile atomic_flag*>(__f));
}
inline _LIBCPP_INLINE_VISIBILITY
void
atomic_flag_clear_explicit(volatile atomic_flag* __f, memory_order __o)
{
__atomic_store(&__f->__flg_, __atomic_flag__(false), __o);
}
inline _LIBCPP_INLINE_VISIBILITY
void
atomic_flag_clear_explicit(atomic_flag* __f, memory_order __o)
{
atomic_flag_clear_explicit(const_cast<volatile atomic_flag*>(__f), __o);
}
#define ATOMIC_FLAG_INIT {false}
#define ATOMIC_VAR_INIT(__v) {__v}
inline _LIBCPP_INLINE_VISIBILITY
memory_order
__translate_memory_order(memory_order __o)
{
switch (__o)
{
case memory_order_acq_rel:
return memory_order_acquire;
case memory_order_release:
return memory_order_relaxed;
}
return __o;
}
// lock-free property
#define ATOMIC_CHAR_LOCK_FREE 0
#define ATOMIC_CHAR16_T_LOCK_FREE 0
#define ATOMIC_CHAR32_T_LOCK_FREE 0
#define ATOMIC_WCHAR_T_LOCK_FREE 0
#define ATOMIC_SHORT_LOCK_FREE 0
#define ATOMIC_INT_LOCK_FREE 0
#define ATOMIC_LONG_LOCK_FREE 0
#define ATOMIC_LLONG_LOCK_FREE 0
*/
_LIBCPP_END_NAMESPACE_STD
#endif // _LIBCPP_ATOMIC

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@ -0,0 +1,19 @@
//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <atomic>
// void atomic_signal_fence(memory_order m);
#include <atomic>
int main()
{
std::atomic_signal_fence(std::memory_order_seq_cst);
}

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@ -0,0 +1,19 @@
//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <atomic>
// void atomic_thread_fence(memory_order m);
#include <atomic>
int main()
{
std::atomic_thread_fence(std::memory_order_seq_cst);
}

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@ -0,0 +1,50 @@
//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <atomic>
// #define ATOMIC_CHAR_LOCK_FREE unspecified
// #define ATOMIC_CHAR16_T_LOCK_FREE unspecified
// #define ATOMIC_CHAR32_T_LOCK_FREE unspecified
// #define ATOMIC_WCHAR_T_LOCK_FREE unspecified
// #define ATOMIC_SHORT_LOCK_FREE unspecified
// #define ATOMIC_INT_LOCK_FREE unspecified
// #define ATOMIC_LONG_LOCK_FREE unspecified
// #define ATOMIC_LLONG_LOCK_FREE unspecified
#include <atomic>
#include <cassert>
int main()
{
assert(ATOMIC_CHAR_LOCK_FREE == 0 ||
ATOMIC_CHAR_LOCK_FREE == 1 ||
ATOMIC_CHAR_LOCK_FREE == 2);
assert(ATOMIC_CHAR16_T_LOCK_FREE == 0 ||
ATOMIC_CHAR16_T_LOCK_FREE == 1 ||
ATOMIC_CHAR16_T_LOCK_FREE == 2);
assert(ATOMIC_CHAR32_T_LOCK_FREE == 0 ||
ATOMIC_CHAR32_T_LOCK_FREE == 1 ||
ATOMIC_CHAR32_T_LOCK_FREE == 2);
assert(ATOMIC_WCHAR_T_LOCK_FREE == 0 ||
ATOMIC_WCHAR_T_LOCK_FREE == 1 ||
ATOMIC_WCHAR_T_LOCK_FREE == 2);
assert(ATOMIC_SHORT_LOCK_FREE == 0 ||
ATOMIC_SHORT_LOCK_FREE == 1 ||
ATOMIC_SHORT_LOCK_FREE == 2);
assert(ATOMIC_INT_LOCK_FREE == 0 ||
ATOMIC_INT_LOCK_FREE == 1 ||
ATOMIC_INT_LOCK_FREE == 2);
assert(ATOMIC_LONG_LOCK_FREE == 0 ||
ATOMIC_LONG_LOCK_FREE == 1 ||
ATOMIC_LONG_LOCK_FREE == 2);
assert(ATOMIC_LLONG_LOCK_FREE == 0 ||
ATOMIC_LLONG_LOCK_FREE == 1 ||
ATOMIC_LLONG_LOCK_FREE == 2);
}

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@ -0,0 +1,66 @@
//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <atomic>
// typedef atomic<int_least8_t> atomic_int_least8_t;
// typedef atomic<uint_least8_t> atomic_uint_least8_t;
// typedef atomic<int_least16_t> atomic_int_least16_t;
// typedef atomic<uint_least16_t> atomic_uint_least16_t;
// typedef atomic<int_least32_t> atomic_int_least32_t;
// typedef atomic<uint_least32_t> atomic_uint_least32_t;
// typedef atomic<int_least64_t> atomic_int_least64_t;
// typedef atomic<uint_least64_t> atomic_uint_least64_t;
//
// typedef atomic<int_fast8_t> atomic_int_fast8_t;
// typedef atomic<uint_fast8_t> atomic_uint_fast8_t;
// typedef atomic<int_fast16_t> atomic_int_fast16_t;
// typedef atomic<uint_fast16_t> atomic_uint_fast16_t;
// typedef atomic<int_fast32_t> atomic_int_fast32_t;
// typedef atomic<uint_fast32_t> atomic_uint_fast32_t;
// typedef atomic<int_fast64_t> atomic_int_fast64_t;
// typedef atomic<uint_fast64_t> atomic_uint_fast64_t;
//
// typedef atomic<intptr_t> atomic_intptr_t;
// typedef atomic<uintptr_t> atomic_uintptr_t;
// typedef atomic<size_t> atomic_size_t;
// typedef atomic<ptrdiff_t> atomic_ptrdiff_t;
// typedef atomic<intmax_t> atomic_intmax_t;
// typedef atomic<uintmax_t> atomic_uintmax_t;
#include <atomic>
#include <type_traits>
int main()
{
static_assert((std::is_same<std::atomic< std::int_least8_t>, std::atomic_int_least8_t>::value), "");
static_assert((std::is_same<std::atomic< std::uint_least8_t>, std::atomic_uint_least8_t>::value), "");
static_assert((std::is_same<std::atomic< std::int_least16_t>, std::atomic_int_least16_t>::value), "");
static_assert((std::is_same<std::atomic<std::uint_least16_t>, std::atomic_uint_least16_t>::value), "");
static_assert((std::is_same<std::atomic< std::int_least32_t>, std::atomic_int_least32_t>::value), "");
static_assert((std::is_same<std::atomic<std::uint_least32_t>, std::atomic_uint_least32_t>::value), "");
static_assert((std::is_same<std::atomic< std::int_least64_t>, std::atomic_int_least64_t>::value), "");
static_assert((std::is_same<std::atomic<std::uint_least64_t>, std::atomic_uint_least64_t>::value), "");
static_assert((std::is_same<std::atomic< std::int_fast8_t>, std::atomic_int_fast8_t>::value), "");
static_assert((std::is_same<std::atomic< std::uint_fast8_t>, std::atomic_uint_fast8_t>::value), "");
static_assert((std::is_same<std::atomic< std::int_fast16_t>, std::atomic_int_fast16_t>::value), "");
static_assert((std::is_same<std::atomic<std::uint_fast16_t>, std::atomic_uint_fast16_t>::value), "");
static_assert((std::is_same<std::atomic< std::int_fast32_t>, std::atomic_int_fast32_t>::value), "");
static_assert((std::is_same<std::atomic<std::uint_fast32_t>, std::atomic_uint_fast32_t>::value), "");
static_assert((std::is_same<std::atomic< std::int_fast64_t>, std::atomic_int_fast64_t>::value), "");
static_assert((std::is_same<std::atomic<std::uint_fast64_t>, std::atomic_uint_fast64_t>::value), "");
static_assert((std::is_same<std::atomic< std::intptr_t>, std::atomic_intptr_t>::value), "");
static_assert((std::is_same<std::atomic<std::uintptr_t>, std::atomic_uintptr_t>::value), "");
static_assert((std::is_same<std::atomic< std::size_t>, std::atomic_size_t>::value), "");
static_assert((std::is_same<std::atomic<std::ptrdiff_t>, std::atomic_ptrdiff_t>::value), "");
static_assert((std::is_same<std::atomic< std::intmax_t>, std::atomic_intmax_t>::value), "");
static_assert((std::is_same<std::atomic<std::uintmax_t>, std::atomic_uintmax_t>::value), "");
}

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@ -0,0 +1,48 @@
//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <atomic>
// typedef atomic<char> atomic_char;
// typedef atomic<signed char> atomic_schar;
// typedef atomic<unsigned char> atomic_uchar;
// typedef atomic<short> atomic_short;
// typedef atomic<unsigned short> atomic_ushort;
// typedef atomic<int> atomic_int;
// typedef atomic<unsigned int> atomic_uint;
// typedef atomic<long> atomic_long;
// typedef atomic<unsigned long> atomic_ulong;
// typedef atomic<long long> atomic_llong;
// typedef atomic<unsigned long long> atomic_ullong;
// typedef atomic<char16_t> atomic_char16_t;
// typedef atomic<char32_t> atomic_char32_t;
// typedef atomic<wchar_t> atomic_wchar_t;
#include <atomic>
#include <type_traits>
int main()
{
static_assert((std::is_same<std::atomic<char>, std::atomic_char>::value), "");
static_assert((std::is_same<std::atomic<signed char>, std::atomic_schar>::value), "");
static_assert((std::is_same<std::atomic<unsigned char>, std::atomic_uchar>::value), "");
static_assert((std::is_same<std::atomic<short>, std::atomic_short>::value), "");
static_assert((std::is_same<std::atomic<unsigned short>, std::atomic_ushort>::value), "");
static_assert((std::is_same<std::atomic<int>, std::atomic_int>::value), "");
static_assert((std::is_same<std::atomic<unsigned int>, std::atomic_uint>::value), "");
static_assert((std::is_same<std::atomic<long>, std::atomic_long>::value), "");
static_assert((std::is_same<std::atomic<unsigned long>, std::atomic_ulong>::value), "");
static_assert((std::is_same<std::atomic<long long>, std::atomic_llong>::value), "");
static_assert((std::is_same<std::atomic<unsigned long long>, std::atomic_ullong>::value), "");
static_assert((std::is_same<std::atomic<wchar_t>, std::atomic_wchar_t>::value), "");
#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS
static_assert((std::is_same<std::atomic<char16_t>, std::atomic_char16_t>::value), "");
static_assert((std::is_same<std::atomic<char32_t>, std::atomic_char32_t>::value), "");
#endif // _LIBCPP_HAS_NO_UNICODE_CHARS
}

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// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
int main()
{
}

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@ -0,0 +1,13 @@
// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
int main()
{
}

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@ -0,0 +1,13 @@
// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
int main()
{
}

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@ -0,0 +1,21 @@
//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <atomic>
// #define ATOMIC_VAR_INIT(value)
#include <atomic>
#include <cassert>
int main()
{
std::atomic<int> v = ATOMIC_VAR_INIT(5);
assert(v == 5);
}

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@ -0,0 +1,13 @@
// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
int main()
{
}

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@ -0,0 +1,13 @@
// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
int main()
{
}