ucontext.h 2.0 KB

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  1. /* Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
  2. This file is part of the GNU C Library.
  3. The GNU C Library is free software; you can redistribute it and/or
  4. modify it under the terms of the GNU Lesser General Public
  5. License as published by the Free Software Foundation; either
  6. version 2.1 of the License, or (at your option) any later version.
  7. The GNU C Library is distributed in the hope that it will be useful,
  8. but WITHOUT ANY WARRANTY; without even the implied warranty of
  9. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  10. Lesser General Public License for more details.
  11. You should have received a copy of the GNU Lesser General Public
  12. License along with the GNU C Library; if not, see
  13. <http://www.gnu.org/licenses/>. */
  14. /* The System V ABI user-level context switching support functions
  15. are marked obsolescent by SuSv3. */
  16. #ifndef _UCONTEXT_H
  17. #define _UCONTEXT_H 1
  18. #include <features.h>
  19. #ifdef __UCLIBC_HAS_CONTEXT_FUNCS__
  20. /* Get machine dependent definition of data structures. */
  21. #include <sys/ucontext.h>
  22. __BEGIN_DECLS
  23. /* Get user context and store it in variable pointed to by UCP. */
  24. extern int getcontext (ucontext_t *__ucp) __THROWNL;
  25. /* Set user context from information of variable pointed to by UCP. */
  26. extern int setcontext (const ucontext_t *__ucp) __THROWNL;
  27. /* Save current context in context variable pointed to by OUCP and set
  28. context from variable pointed to by UCP. */
  29. extern int swapcontext (ucontext_t *__restrict __oucp,
  30. const ucontext_t *__restrict __ucp) __THROWNL;
  31. /* Manipulate user context UCP to continue with calling functions FUNC
  32. and the ARGC-1 parameters following ARGC when the context is used
  33. the next time in `setcontext' or `swapcontext'.
  34. We cannot say anything about the parameters FUNC takes; `void'
  35. is as good as any other choice. */
  36. extern void makecontext (ucontext_t *__ucp, void (*__func) (void),
  37. int __argc, ...) __THROW;
  38. __END_DECLS
  39. #endif
  40. #endif /* ucontext.h */