原子整数类型
| 原子类型名 | 直接类型 |
| atomic_bool | _Atomic _Bool |
| atomic_char | _Atomic char |
| atomic_schar | _Atomic signed char |
| atomic_uchar | _Atomic unsigned char |
| atomic_short | _Atomic short |
| atomic_ushort | _Atomic unsigned short |
| atomic_int | _Atomic int |
| atomic_uint | _Atomic unsigned int |
| atomic_long | _Atomic long |
| atomic_ulong | _Atomic unsigned long |
| atomic_llong | _Atomic long long |
| atomic_ullong | _Atomic unsigned long long |
| atomic_char16_t | _Atomic char16_t |
| atomic_char32_t | _Atomic char32_t |
| atomic_wchar_t | _Atomic wchar_t |
| atomic_int_least8_t | _Atomic int_least8_t |
| atomic_uint_least8_t | _Atomic uint_least8_t |
| atomic_int_least16_t | _Atomic int_least16_t |
| atomic_uint_least16_t | _Atomic uint_least16_t |
| atomic_int_least32_t | _Atomic int_least32_t |
| atomic_uint_least32_t | _Atomic uint_least32_t |
| atomic_int_least64_t | _Atomic int_least64_t |
| atomic_uint_least64_t | _Atomic uint_least64_t |
| atomic_int_fast8_t | _Atomic int_fast8_t |
| atomic_uint_fast8_t | _Atomic uint_fast8_t |
| atomic_int_fast16_t | _Atomic int_fast16_t |
| atomic_uint_fast16_t | _Atomic uint_fast16_t |
| atomic_int_fast32_t | _Atomic int_fast32_t |
| atomic_uint_fast32_t | _Atomic uint_fast32_t |
| atomic_int_fast64_t | _Atomic int_fast64_t |
| atomic_uint_fast64_t | _Atomic uint_fast64_t |
| atomic_intptr_t | _Atomic intptr_t |
| atomic_uintptr_t | _Atomic uintptr_t |
| atomic_size_t | _Atomic size_t |
| atomic_ptrdiff_t | _Atomic ptrdiff_t |
| atomic_intmax_t | _Atomic intmax_t |
| atomic_uintmax_t | _Atomic uintmax_t |
对于上表中的每一行，原子类型名与对应的直接类型具有相同的表示方式和对齐要求；相同的表示方式和对齐要求意味着作为函数的参数、函数的返回值以及联合成员时两者可以互换。