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568035b7 | 1 | /* Copyright (C) 2001-2013 Free Software Foundation, Inc. |
d5efd131 MF |
2 | This file is part of the GNU C Library. |
3 | Contributed by David Mosberger-Tang <davidm@hpl.hp.com>. | |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
75efb018 MF |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
d5efd131 MF |
18 | |
19 | #include <ucontext.h> | |
20 | ||
21 | struct rv | |
22 | { | |
23 | long retval; | |
24 | long first_return; | |
25 | }; | |
26 | ||
27 | extern struct rv __getcontext (ucontext_t *__ucp) __THROW; | |
293432b4 | 28 | extern int __setcontext (const ucontext_t *__ucp) __THROW; |
d5efd131 MF |
29 | |
30 | int | |
31 | __swapcontext (ucontext_t *oucp, const ucontext_t *ucp) | |
32 | { | |
33 | struct rv rv = __getcontext (oucp); | |
34 | if (rv.first_return) | |
35 | __setcontext (ucp); | |
36 | return 0; | |
37 | } | |
38 | ||
39 | weak_alias (__swapcontext, swapcontext) |