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The C and C++ Include Header Files

cat -n /usr/include/c++/15/bits/atomic_lockfree_defines.h

     1	// -*- C++ -*- header.
     2	
     3	// Copyright (C) 2008-2025 Free Software Foundation, Inc.
     4	//
     5	// This file is part of the GNU ISO C++ Library.  This library is free
     6	// software; you can redistribute it and/or modify it under the
     7	// terms of the GNU General Public License as published by the
     8	// Free Software Foundation; either version 3, or (at your option)
     9	// any later version.
    10	
    11	// This library is distributed in the hope that it will be useful,
    12	// but WITHOUT ANY WARRANTY; without even the implied warranty of
    13	// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    14	// GNU General Public License for more details.
    15	
    16	// Under Section 7 of GPL version 3, you are granted additional
    17	// permissions described in the GCC Runtime Library Exception, version
    18	// 3.1, as published by the Free Software Foundation.
    19	
    20	// You should have received a copy of the GNU General Public License and
    21	// a copy of the GCC Runtime Library Exception along with this program;
    22	// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
    23	// <http://www.gnu.org/licenses/>.
    24	
    25	/** @file bits/atomic_lockfree_defines.h
    26	 *  This is an internal header file, included by other library headers.
    27	 *  Do not attempt to use it directly. @headername{atomic}
    28	 */
    29	
    30	#ifndef _GLIBCXX_ATOMIC_LOCK_FREE_H
    31	#define _GLIBCXX_ATOMIC_LOCK_FREE_H 1
    32	
    33	#ifdef _GLIBCXX_SYSHDR
    34	#pragma GCC system_header
    35	#endif
    36	
    37	/**
    38	 * @addtogroup atomics
    39	 * @{
    40	 */
    41	
    42	/**
    43	 * Lock-free property.
    44	 *
    45	 * 0 indicates that the types are never lock-free.
    46	 * 1 indicates that the types are sometimes lock-free.
    47	 * 2 indicates that the types are always lock-free.
    48	 */
    49	
    50	#if __cplusplus >= 201103L
    51	#define ATOMIC_BOOL_LOCK_FREE		__GCC_ATOMIC_BOOL_LOCK_FREE
    52	#define ATOMIC_CHAR_LOCK_FREE		__GCC_ATOMIC_CHAR_LOCK_FREE
    53	#define ATOMIC_WCHAR_T_LOCK_FREE	__GCC_ATOMIC_WCHAR_T_LOCK_FREE
    54	#ifdef _GLIBCXX_USE_CHAR8_T
    55	#define ATOMIC_CHAR8_T_LOCK_FREE	__GCC_ATOMIC_CHAR8_T_LOCK_FREE
    56	#endif
    57	#define ATOMIC_CHAR16_T_LOCK_FREE	__GCC_ATOMIC_CHAR16_T_LOCK_FREE
    58	#define ATOMIC_CHAR32_T_LOCK_FREE	__GCC_ATOMIC_CHAR32_T_LOCK_FREE
    59	#define ATOMIC_SHORT_LOCK_FREE		__GCC_ATOMIC_SHORT_LOCK_FREE
    60	#define ATOMIC_INT_LOCK_FREE		__GCC_ATOMIC_INT_LOCK_FREE
    61	#define ATOMIC_LONG_LOCK_FREE		__GCC_ATOMIC_LONG_LOCK_FREE
    62	#define ATOMIC_LLONG_LOCK_FREE		__GCC_ATOMIC_LLONG_LOCK_FREE
    63	#define ATOMIC_POINTER_LOCK_FREE	__GCC_ATOMIC_POINTER_LOCK_FREE
    64	#endif
    65	
    66	/// @} group atomics
    67	
    68	#endif