| /* Copyright (C) 2001-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by David Mosberger-Tang <davidm@hpl.hp.com>. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <ucontext.h> |
| |
| struct rv |
| { |
| long retval; |
| long first_return; |
| }; |
| |
| extern struct rv __getcontext (ucontext_t *__ucp) __THROW; |
| extern int __setcontext (const ucontext_t *__ucp) __THROW; |
| |
| int |
| __swapcontext (ucontext_t *oucp, const ucontext_t *ucp) |
| { |
| struct rv rv = __getcontext (oucp); |
| if (rv.first_return) |
| __setcontext (ucp); |
| return 0; |
| } |
| |
| weak_alias (__swapcontext, swapcontext) |
