third_party/llvm-project/clang/lib/Headers/stdatomic.h - cobalt - Git at Google

 /*===---- stdatomic.h - Standard header for atomic types and operations -----===
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
  * in the Software without restriction, including without limitation the rights
  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  * copies of the Software, and to permit persons to whom the Software is
  * furnished to do so, subject to the following conditions:
  *
  * The above copyright notice and this permission notice shall be included in
  * all copies or substantial portions of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  *
  *===-----------------------------------------------------------------------===
  */

 #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.
  */
 #if __STDC_HOSTED__ && __has_include_next(<stdatomic.h>)
 # 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)
 #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 }

 /* 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 */
	/*===---- stdatomic.h - Standard header for atomic types and operations -----===
	*
	* Permission is hereby granted, free of charge, to any person obtaining a copy
	* of this software and associated documentation files (the "Software"), to deal
	* in the Software without restriction, including without limitation the rights
	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	* copies of the Software, and to permit persons to whom the Software is
	* furnished to do so, subject to the following conditions:
	*
	* The above copyright notice and this permission notice shall be included in
	* all copies or substantial portions of the Software.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	* THE SOFTWARE.
	*
	*===-----------------------------------------------------------------------===
	*/

	#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.
	*/
	#if __STDC_HOSTED__ && __has_include_next(<stdatomic.h>)
	# 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)
	#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 }

	/* 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 */