projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 5bccf609 | 1 | /* Swap to new context. |
| 04277e02 | 2 | Copyright (C) 2008-2019 Free Software Foundation, Inc. |
| 5bccf609 CD |
3 | This file is part of the GNU C Library. |
| 4 | Contributed by Helge Deller <deller@gmx.de>, 2008. | |
| 5 | ||
| 6 | The GNU C Library is free software; you can redistribute it and/or | |
| 7 | modify it under the terms of the GNU Lesser General Public | |
| 8 | License as published by the Free Software Foundation; either | |
| 9 | version 2.1 of the License, or (at your option) any later version. | |
| 10 | ||
| 11 | The GNU C Library is distributed in the hope that it will be useful, | |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 14 | Lesser General Public License for more details. | |
| 15 | ||
| 16 | You should have received a copy of the GNU Lesser General Public | |
| ab84e3ff | 17 | License along with the GNU C Library. If not, see |
| 5a82c748 | 18 | <https://www.gnu.org/licenses/>. */ |
| 5bccf609 CD |
19 | |
| 20 | #include <ucontext.h> | |
| 21 | ||
| 22 | extern int __getcontext (ucontext_t *ucp); | |
| 23 | extern int __setcontext (const ucontext_t *ucp); | |
| 24 | ||
| 25 | int | |
| 26 | __swapcontext (ucontext_t *oucp, const ucontext_t *ucp) | |
| 27 | { | |
| 28 | /* Save the current machine context to oucp. */ | |
| 29 | __getcontext (oucp); | |
| 30 | ||
| 31 | /* mark sc_sar flag to skip the setcontext call on reactivation. */ | |
| 32 | if (oucp->uc_mcontext.sc_sar == 0) { | |
| 5abebba4 | 33 | oucp->uc_mcontext.sc_sar++; |
| 5bccf609 CD |
34 | |
| 35 | /* Restore the machine context in ucp. */ | |
| 5abebba4 | 36 | __setcontext (ucp); |
| 5bccf609 CD |
37 | } |
| 38 | ||
| 39 | return 0; | |
| 40 | } | |
| 41 | ||
| 42 | weak_alias (__swapcontext, swapcontext) |