text: /*===---- stdatomic.h - Standard header for atomic types and operations -----===
   *
   * 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
   *
   *===-----------------------------------------------------------------------===
   */
  
  #ifndef __CLANG_STDATOMIC_H
  #define __CLANG_STDATOMIC_H
  
  /* If we're hosted, fall back to the system's stdatomic.h. FreeBSD, for
   * example, already has a Clang-compatible stdatomic.h header.
   *
   * Exclude the MSVC path as well as the MSVC header as of the 14.31.30818
   * explicitly disallows `stdatomic.h` in the C mode via an `#error`.  Fallback
   * to the clang resource header until that is fully supported.
   */
  #if __STDC_HOSTED__ && __has_include_next(<stdatomic.h>) && !defined(_MSC_VER)
  # include_next <stdatomic.h>
  #else
  
  #include <stddef.h>
  #include <stdint.h>
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  /* 7.17.1 Introduction */
  
  #define ATOMIC_BOOL_LOCK_FREE       __CLANG_ATOMIC_BOOL_LOCK_FREE
  #define ATOMIC_CHAR_LOCK_FREE       __CLANG_ATOMIC_CHAR_LOCK_FREE
  #define ATOMIC_CHAR16_T_LOCK_FREE   __CLANG_ATOMIC_CHAR16_T_LOCK_FREE
  #define ATOMIC_CHAR32_T_LOCK_FREE   __CLANG_ATOMIC_CHAR32_T_LOCK_FREE
  #define ATOMIC_WCHAR_T_LOCK_FREE    __CLANG_ATOMIC_WCHAR_T_LOCK_FREE
  #define ATOMIC_SHORT_LOCK_FREE      __CLANG_ATOMIC_SHORT_LOCK_FREE
  #define ATOMIC_INT_LOCK_FREE        __CLANG_ATOMIC_INT_LOCK_FREE
  #define ATOMIC_LONG_LOCK_FREE       __CLANG_ATOMIC_LONG_LOCK_FREE
  #define ATOMIC_LLONG_LOCK_FREE      __CLANG_ATOMIC_LLONG_LOCK_FREE
  #define ATOMIC_POINTER_LOCK_FREE    __CLANG_ATOMIC_POINTER_LOCK_FREE
  
  /* 7.17.2 Initialization */
  
  #define ATOMIC_VAR_INIT(value) (value)
  #if (__STDC_VERSION__ >= 201710L || __cplusplus >= 202002L) &&                 \
      !defined(_CLANG_DISABLE_CRT_DEPRECATION_WARNINGS)
  /* ATOMIC_VAR_INIT was deprecated in C17 and C++20. */
  #pragma clang deprecated(ATOMIC_VAR_INIT)
  #endif
  #define atomic_init __c11_atomic_init
  
  /* 7.17.3 Order and consistency */
  
  typedef enum memory_order {
    memory_order_relaxed = __ATOMIC_RELAXED,
    memory_order_consume = __ATOMIC_CONSUME,
    memory_order_acquire = __ATOMIC_ACQUIRE,
    memory_order_release = __ATOMIC_RELEASE,
    memory_order_acq_rel = __ATOMIC_ACQ_REL,
    memory_order_seq_cst = __ATOMIC_SEQ_CST
  } memory_order;
  
  #define kill_dependency(y) (y)
  
  /* 7.17.4 Fences */
  
  /* These should be provided by the libc implementation. */
  void atomic_thread_fence(memory_order);
  void atomic_signal_fence(memory_order);
  
  #define atomic_thread_fence(order) __c11_atomic_thread_fence(order)
  #define atomic_signal_fence(order) __c11_atomic_signal_fence(order)
  
  /* 7.17.5 Lock-free property */
  
  #define atomic_is_lock_free(obj) __c11_atomic_is_lock_free(sizeof(*(obj)))
  
  /* 7.17.6 Atomic integer types */
  
  #ifdef __cplusplus
  typedef _Atomic(bool)               atomic_bool;
  #else
  typedef _Atomic(_Bool)              atomic_bool;
  #endif
  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(uint_least16_t)     atomic_char16_t;
  typedef _Atomic(uint_least32_t)     atomic_char32_t;
  typedef _Atomic(wchar_t)            atomic_wchar_t;
  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;
  
  /* 7.17.7 Operations on atomic types */
  
  #define atomic_store(object, desired) __c11_atomic_store(object, desired, __ATOMIC_SEQ_CST)
  #define atomic_store_explicit __c11_atomic_store
  
  #define atomic_load(object) __c11_atomic_load(object, __ATOMIC_SEQ_CST)
  #define atomic_load_explicit __c11_atomic_load
  
  #define atomic_exchange(object, desired) __c11_atomic_exchange(object, desired, __ATOMIC_SEQ_CST)
  #define atomic_exchange_explicit __c11_atomic_exchange
  
  #define atomic_compare_exchange_strong(object, expected, desired) __c11_atomic_compare_exchange_strong(object, expected, desired, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST)
  #define atomic_compare_exchange_strong_explicit __c11_atomic_compare_exchange_strong
  
  #define atomic_compare_exchange_weak(object, expected, desired) __c11_atomic_compare_exchange_weak(object, expected, desired, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST)
  #define atomic_compare_exchange_weak_explicit __c11_atomic_compare_exchange_weak
  
  #define atomic_fetch_add(object, operand) __c11_atomic_fetch_add(object, operand, __ATOMIC_SEQ_CST)
  #define atomic_fetch_add_explicit __c11_atomic_fetch_add
  
  #define atomic_fetch_sub(object, operand) __c11_atomic_fetch_sub(object, operand, __ATOMIC_SEQ_CST)
  #define atomic_fetch_sub_explicit __c11_atomic_fetch_sub
  
  #define atomic_fetch_or(object, operand) __c11_atomic_fetch_or(object, operand, __ATOMIC_SEQ_CST)
  #define atomic_fetch_or_explicit __c11_atomic_fetch_or
  
  #define atomic_fetch_xor(object, operand) __c11_atomic_fetch_xor(object, operand, __ATOMIC_SEQ_CST)
  #define atomic_fetch_xor_explicit __c11_atomic_fetch_xor
  
  #define atomic_fetch_and(object, operand) __c11_atomic_fetch_and(object, operand, __ATOMIC_SEQ_CST)
  #define atomic_fetch_and_explicit __c11_atomic_fetch_and
  
  /* 7.17.8 Atomic flag type and operations */
  
  typedef struct atomic_flag { atomic_bool _Value; } atomic_flag;
  
  #define ATOMIC_FLAG_INIT { 0 }
  #if __cplusplus >= 202002L && !defined(_CLANG_DISABLE_CRT_DEPRECATION_WARNINGS)
  /* ATOMIC_FLAG_INIT was deprecated in C++20 but is not deprecated in C. */
  #pragma clang deprecated(ATOMIC_FLAG_INIT)
  #endif
  
  /* These should be provided by the libc implementation. */
  #ifdef __cplusplus
  bool atomic_flag_test_and_set(volatile atomic_flag *);
  bool atomic_flag_test_and_set_explicit(volatile atomic_flag *, memory_order);
  #else
  _Bool atomic_flag_test_and_set(volatile atomic_flag *);
  _Bool atomic_flag_test_and_set_explicit(volatile atomic_flag *, memory_order);
  #endif
  void atomic_flag_clear(volatile atomic_flag *);
  void atomic_flag_clear_explicit(volatile atomic_flag *, memory_order);
  
  #define atomic_flag_test_and_set(object) __c11_atomic_exchange(&(object)->_Value, 1, __ATOMIC_SEQ_CST)
  #define atomic_flag_test_and_set_explicit(object, order) __c11_atomic_exchange(&(object)->_Value, 1, order)
  
  #define atomic_flag_clear(object) __c11_atomic_store(&(object)->_Value, 0, __ATOMIC_SEQ_CST)
  #define atomic_flag_clear_explicit(object, order) __c11_atomic_store(&(object)->_Value, 0, order)
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* __STDC_HOSTED__ */
  #endif /* __CLANG_STDATOMIC_H */
  
  