1 /* Copyright (C) 1991-1999,2001,2002,2007,2009 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 <http://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/jmp_buf_tag.h> 31 32 __BEGIN_NAMESPACE_STD 33 34 typedef struct __jmp_buf_tag jmp_buf[1]; 35 36 /* Store the calling environment in ENV, also saving the signal mask. 37 Return 0. */ 38 extern int setjmp (jmp_buf __env) __THROWNL; 39 40 __END_NAMESPACE_STD 41 42 /* Store the calling environment in ENV, also saving the 43 signal mask if SAVEMASK is nonzero. Return 0. 44 This is the internal name for `sigsetjmp'. */ 45 extern int __sigsetjmp (struct __jmp_buf_tag __env[1], int __savemask) 46 __THROWNL; 47 48 /* Store the calling environment in ENV, not saving the signal mask. 49 Return 0. */ 50 extern int _setjmp (struct __jmp_buf_tag __env[1]) __THROWNL; 51 52 /* Do not save the signal mask. This is equivalent to the `_setjmp' 53 BSD function. */ 54 #define setjmp(env) _setjmp (env) 55 56 __BEGIN_NAMESPACE_STD 57 58 /* Jump to the environment saved in ENV, making the 59 `setjmp' call there return VAL, or 1 if VAL is 0. */ 60 extern void longjmp (struct __jmp_buf_tag __env[1], int __val) 61 __THROWNL __attribute__ ((__noreturn__)); 62 63 __END_NAMESPACE_STD 64 65 #if defined __USE_BSD || defined __USE_XOPEN 66 /* Same. Usually `_longjmp' is used with `_setjmp', which does not save 67 the signal mask. But it is how ENV was saved that determines whether 68 `longjmp' restores the mask; `_longjmp' is just an alias. */ 69 extern void _longjmp (struct __jmp_buf_tag __env[1], int __val) 70 __THROWNL __attribute__ ((__noreturn__)); 71 #endif 72 73 74 #ifdef __USE_POSIX 75 /* Use the same type for `jmp_buf' and `sigjmp_buf'. 76 The `__mask_was_saved' flag determines whether 77 or not `longjmp' will restore the signal mask. */ 78 typedef struct __jmp_buf_tag sigjmp_buf[1]; 79 80 /* Store the calling environment in ENV, also saving the 81 signal mask if SAVEMASK is nonzero. Return 0. */ 82 # define sigsetjmp(env, savemask) __sigsetjmp (env, savemask) 83 84 /* Jump to the environment saved in ENV, making the 85 sigsetjmp call there return VAL, or 1 if VAL is 0. 86 Restore the signal mask if that sigsetjmp call saved it. 87 This is just an alias `longjmp'. */ 88 extern void siglongjmp (sigjmp_buf __env, int __val) 89 __THROWNL __attribute__ ((__noreturn__)); 90 #endif /* Use POSIX. */ 91 92 __END_DECLS 93 94 #ifdef _LIBC 95 extern void __longjmp(__jmp_buf __env, int __val) __THROWNL attribute_noreturn; 96 libc_hidden_proto(__longjmp) 97 extern void __libc_longjmp(struct __jmp_buf_tag __env[1], int __val) 98 __THROWNL attribute_noreturn; 99 extern void __libc_siglongjmp(sigjmp_buf __env, int __val) 100 __THROWNL attribute_noreturn; 101 extern void _longjmp_unwind(jmp_buf __env, int __val); 102 libc_hidden_proto(_longjmp_unwind) 103 extern int __sigjmp_save(sigjmp_buf __env, int __savemask) attribute_hidden; 104 /* We use the normal longjmp for unwinding */ 105 # define __libc_unwind_longjmp(buf, val) __libc_longjmp(buf, val) 106 #endif 107 108 #endif /* setjmp.h */ 109