| /* Swap to new context. |
| Copyright (C) 2008-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Helge Deller <deller@gmx.de>, 2008. |
| |
| 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> |
| |
| extern int __getcontext (ucontext_t *ucp); |
| extern int __setcontext (const ucontext_t *ucp); |
| |
| int |
| __swapcontext (ucontext_t *oucp, const ucontext_t *ucp) |
| { |
| /* Save the current machine context to oucp. */ |
| __getcontext (oucp); |
| |
| /* mark sc_sar flag to skip the setcontext call on reactivation. */ |
| if (oucp->uc_mcontext.sc_sar == 0) { |
| oucp->uc_mcontext.sc_sar++; |
| |
| /* Restore the machine context in ucp. */ |
| __setcontext (ucp); |
| } |
| |
| return 0; |
| } |
| |
| weak_alias (__swapcontext, swapcontext) |
