| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | /* Copyright (C) 1997-2015 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. |
| 3 | |
| 4 | The GNU C Library is free software; you can redistribute it and/or |
| 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. |
| 8 | |
| 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 |
| 12 | Lesser General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU Lesser General Public |
| 15 | License along with the GNU C Library; if not, see |
| 16 | <http://www.gnu.org/licenses/>. */ |
| 17 | |
| 18 | /* System V ABI compliant user-level context switching support. */ |
| 19 | |
| 20 | #ifndef _UCONTEXT_H |
| 21 | #define _UCONTEXT_H 1 |
| 22 | |
| 23 | #include <features.h> |
| 24 | |
| 25 | /* Get machine dependent definition of data structures. */ |
| 26 | #include <sys/ucontext.h> |
| 27 | |
| 28 | __BEGIN_DECLS |
| 29 | |
| 30 | /* Get user context and store it in variable pointed to by UCP. */ |
| 31 | extern int getcontext (ucontext_t *__ucp) __THROWNL; |
| 32 | |
| 33 | /* Set user context from information of variable pointed to by UCP. */ |
| 34 | extern int setcontext (const ucontext_t *__ucp) __THROWNL; |
| 35 | |
| 36 | /* Save current context in context variable pointed to by OUCP and set |
| 37 | context from variable pointed to by UCP. */ |
| 38 | extern int swapcontext (ucontext_t *__restrict __oucp, |
| 39 | const ucontext_t *__restrict __ucp) __THROWNL; |
| 40 | |
| 41 | /* Manipulate user context UCP to continue with calling functions FUNC |
| 42 | and the ARGC-1 parameters following ARGC when the context is used |
| 43 | the next time in `setcontext' or `swapcontext'. |
| 44 | |
| 45 | We cannot say anything about the parameters FUNC takes; `void' |
| 46 | is as good as any other choice. */ |
| 47 | extern void makecontext (ucontext_t *__ucp, void (*__func) (void), |
| 48 | int __argc, ...) __THROW; |
| 49 | |
| 50 | __END_DECLS |
| 51 | |
| 52 | #endif /* ucontext.h */ |