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edc5984d | 1 | /* Copyright (C) 1991-1999,2001,2002,2007,2009,2011 Free Software Foundation, Inc. |
ba1ffaa1 | 2 | This file is part of the GNU C Library. |
28f540f4 | 3 | |
ba1ffaa1 | 4 | The GNU C Library is free software; you can redistribute it and/or |
41bdb6e2 AJ |
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. | |
28f540f4 | 8 | |
ba1ffaa1 UD |
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 | |
41bdb6e2 | 12 | Lesser General Public License for more details. |
28f540f4 | 13 | |
41bdb6e2 | 14 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
15 | License along with the GNU C Library; if not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
28f540f4 RM |
17 | |
18 | /* | |
d1646309 | 19 | * ISO C99 Standard: 7.13 Nonlocal jumps <setjmp.h> |
28f540f4 RM |
20 | */ |
21 | ||
22 | #ifndef _SETJMP_H | |
28f540f4 | 23 | #define _SETJMP_H 1 |
5107cf1d | 24 | |
28f540f4 RM |
25 | #include <features.h> |
26 | ||
27 | __BEGIN_DECLS | |
28 | ||
5107cf1d UD |
29 | #include <bits/setjmp.h> /* Get `__jmp_buf'. */ |
30 | #include <bits/sigset.h> /* Get `__sigset_t'. */ | |
28f540f4 | 31 | |
7a5affeb | 32 | |
28f540f4 | 33 | /* Calling environment, plus possibly a saved signal mask. */ |
2e0e802a | 34 | struct __jmp_buf_tag |
28f540f4 RM |
35 | { |
36 | /* NOTE: The machine-dependent definitions of `__sigsetjmp' | |
eca90c85 UD |
37 | assume that a `jmp_buf' begins with a `__jmp_buf' and that |
38 | `__mask_was_saved' follows it. Do not move these members | |
39 | or add others before it. */ | |
28f540f4 RM |
40 | __jmp_buf __jmpbuf; /* Calling environment. */ |
41 | int __mask_was_saved; /* Saved the signal mask? */ | |
42 | __sigset_t __saved_mask; /* Saved signal mask. */ | |
2e0e802a UD |
43 | }; |
44 | ||
45 | ||
46 | __BEGIN_NAMESPACE_STD | |
28f540f4 | 47 | |
2e0e802a | 48 | typedef struct __jmp_buf_tag jmp_buf[1]; |
28f540f4 | 49 | |
eca90c85 UD |
50 | /* Store the calling environment in ENV, also saving the signal mask. |
51 | Return 0. */ | |
edc5984d | 52 | extern int setjmp (jmp_buf __env) __THROWNL; |
eca90c85 | 53 | |
7a5affeb | 54 | __END_NAMESPACE_STD |
eca90c85 | 55 | |
28f540f4 RM |
56 | /* Store the calling environment in ENV, also saving the |
57 | signal mask if SAVEMASK is nonzero. Return 0. | |
58 | This is the internal name for `sigsetjmp'. */ | |
edc5984d | 59 | extern int __sigsetjmp (struct __jmp_buf_tag __env[1], int __savemask) __THROWNL; |
28f540f4 RM |
60 | |
61 | #ifndef __FAVOR_BSD | |
7a5affeb UD |
62 | /* Store the calling environment in ENV, not saving the signal mask. |
63 | Return 0. */ | |
edc5984d | 64 | extern int _setjmp (struct __jmp_buf_tag __env[1]) __THROWNL; |
7a5affeb | 65 | |
eca90c85 UD |
66 | /* Do not save the signal mask. This is equivalent to the `_setjmp' |
67 | BSD function. */ | |
68 | # define setjmp(env) _setjmp (env) | |
28f540f4 | 69 | #else |
dc825f85 | 70 | /* We are in 4.3 BSD-compatibility mode in which `setjmp' |
eca90c85 UD |
71 | saves the signal mask like `sigsetjmp (ENV, 1)'. We have to |
72 | define a macro since ISO C says `setjmp' is one. */ | |
73 | # define setjmp(env) setjmp (env) | |
28f540f4 RM |
74 | #endif /* Favor BSD. */ |
75 | ||
28f540f4 | 76 | |
7a5affeb UD |
77 | __BEGIN_NAMESPACE_STD |
78 | ||
28f540f4 RM |
79 | /* Jump to the environment saved in ENV, making the |
80 | `setjmp' call there return VAL, or 1 if VAL is 0. */ | |
7a5affeb | 81 | extern void longjmp (struct __jmp_buf_tag __env[1], int __val) |
edc5984d | 82 | __THROWNL __attribute__ ((__noreturn__)); |
7a5affeb UD |
83 | |
84 | __END_NAMESPACE_STD | |
85 | ||
f21acc89 | 86 | #if defined __USE_BSD || defined __USE_XOPEN |
28f540f4 RM |
87 | /* Same. Usually `_longjmp' is used with `_setjmp', which does not save |
88 | the signal mask. But it is how ENV was saved that determines whether | |
89 | `longjmp' restores the mask; `_longjmp' is just an alias. */ | |
7a5affeb | 90 | extern void _longjmp (struct __jmp_buf_tag __env[1], int __val) |
edc5984d | 91 | __THROWNL __attribute__ ((__noreturn__)); |
f21acc89 | 92 | #endif |
28f540f4 | 93 | |
28f540f4 RM |
94 | |
95 | #ifdef __USE_POSIX | |
96 | /* Use the same type for `jmp_buf' and `sigjmp_buf'. | |
97 | The `__mask_was_saved' flag determines whether | |
98 | or not `longjmp' will restore the signal mask. */ | |
7a5affeb | 99 | typedef struct __jmp_buf_tag sigjmp_buf[1]; |
28f540f4 RM |
100 | |
101 | /* Store the calling environment in ENV, also saving the | |
102 | signal mask if SAVEMASK is nonzero. Return 0. */ | |
eca90c85 | 103 | # define sigsetjmp(env, savemask) __sigsetjmp (env, savemask) |
28f540f4 RM |
104 | |
105 | /* Jump to the environment saved in ENV, making the | |
106 | sigsetjmp call there return VAL, or 1 if VAL is 0. | |
107 | Restore the signal mask if that sigsetjmp call saved it. | |
108 | This is just an alias `longjmp'. */ | |
c1422e5b | 109 | extern void siglongjmp (sigjmp_buf __env, int __val) |
edc5984d | 110 | __THROWNL __attribute__ ((__noreturn__)); |
28f540f4 RM |
111 | #endif /* Use POSIX. */ |
112 | ||
b50f8e42 UD |
113 | |
114 | /* Define helper functions to catch unsafe code. */ | |
115 | #if __USE_FORTIFY_LEVEL > 0 | |
116 | # include <bits/setjmp2.h> | |
117 | #endif | |
118 | ||
28f540f4 RM |
119 | __END_DECLS |
120 | ||
121 | #endif /* setjmp.h */ |