The C and C++ Include Header Files

/usr/include/setjmp.h


$ cat -n /usr/include/setjmp.h

     1	/* Copyright (C) 1991-2024 Free Software Foundation, Inc.
     2	   This file is part of the GNU C Library.
     3	
     4	   The GNU C Library is free software; you can redistribute it and/or
     5	   modify it under the terms of the GNU Lesser General Public
     6	   License as published by the Free Software Foundation; either
     7	   version 2.1 of the License, or (at your option) any later version.
     8	
     9	   The GNU C Library is distributed in the hope that it will be useful,
    10	   but WITHOUT ANY WARRANTY; without even the implied warranty of
    11	   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    12	   Lesser General Public License for more details.
    13	
    14	   You should have received a copy of the GNU Lesser General Public
    15	   License along with the GNU C Library; if not, see
    16	   <https://www.gnu.org/licenses/>.  */
    17	
    18	/*
    19	 *	ISO C99 Standard: 7.13 Nonlocal jumps	<setjmp.h>
    20	 */
    21	
    22	#ifndef	_SETJMP_H
    23	#define	_SETJMP_H	1
    24	
    25	#include <features.h>
    26	
    27	__BEGIN_DECLS
    28	
    29	#include <bits/setjmp.h>		/* Get `__jmp_buf'.  */
    30	#include <bits/types/struct___jmp_buf_tag.h>
    31	
    32	typedef struct __jmp_buf_tag jmp_buf[1];
    33	
    34	/* Store the calling environment in ENV, also saving the signal mask.
    35	   Return 0.  */
    36	extern int setjmp (jmp_buf __env) __THROWNL;
    37	
    38	/* Store the calling environment in ENV, also saving the
    39	   signal mask if SAVEMASK is nonzero.  Return 0.
    40	   This is the internal name for `sigsetjmp'.  */
    41	extern int __sigsetjmp (struct __jmp_buf_tag __env[1], int __savemask) __THROWNL;
    42	
    43	/* Store the calling environment in ENV, not saving the signal mask.
    44	   Return 0.  */
    45	extern int _setjmp (struct __jmp_buf_tag __env[1]) __THROWNL;
    46	
    47	/* Do not save the signal mask.  This is equivalent to the `_setjmp'
    48	   BSD function.  */
    49	#define setjmp(env)	_setjmp (env)
    50	
    51	
    52	/* Jump to the environment saved in ENV, making the
    53	   `setjmp' call there return VAL, or 1 if VAL is 0.  */
    54	extern void longjmp (struct __jmp_buf_tag __env[1], int __val)
    55	     __THROWNL __attribute__ ((__noreturn__));
    56	
    57	#if defined __USE_MISC || defined __USE_XOPEN
    58	/* Same.  Usually `_longjmp' is used with `_setjmp', which does not save
    59	   the signal mask.  But it is how ENV was saved that determines whether
    60	   `longjmp' restores the mask; `_longjmp' is just an alias.  */
    61	extern void _longjmp (struct __jmp_buf_tag __env[1], int __val)
    62	     __THROWNL __attribute__ ((__noreturn__));
    63	#endif
    64	
    65	
    66	#ifdef	__USE_POSIX
    67	/* Use the same type for `jmp_buf' and `sigjmp_buf'.
    68	   The `__mask_was_saved' flag determines whether
    69	   or not `longjmp' will restore the signal mask.  */
    70	typedef struct __jmp_buf_tag sigjmp_buf[1];
    71	
    72	/* Store the calling environment in ENV, also saving the
    73	   signal mask if SAVEMASK is nonzero.  Return 0.  */
    74	# define sigsetjmp(env, savemask)	__sigsetjmp (env, savemask)
    75	
    76	/* Jump to the environment saved in ENV, making the
    77	   sigsetjmp call there return VAL, or 1 if VAL is 0.
    78	   Restore the signal mask if that sigsetjmp call saved it.
    79	   This is just an alias `longjmp'.  */
    80	extern void siglongjmp (sigjmp_buf __env, int __val)
    81	     __THROWNL __attribute__ ((__noreturn__));
    82	#endif /* Use POSIX.  */
    83	
    84	
    85	/* Define helper functions to catch unsafe code.  */
    86	#if __USE_FORTIFY_LEVEL > 0
    87	# include <bits/setjmp2.h>
    88	#endif
    89	
    90	__END_DECLS
    91	
    92	#endif /* setjmp.h  */