diff options
Diffstat (limited to 'include/ucontext.h')
| -rw-r--r-- | include/ucontext.h | 32 |
1 files changed, 29 insertions, 3 deletions
diff --git a/include/ucontext.h b/include/ucontext.h index 14a12704e..f11db7794 100644 --- a/include/ucontext.h +++ b/include/ucontext.h @@ -15,17 +15,43 @@ License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ +/* The System V ABI user-level context switching support functions + are marked obsolescent by SuSv3. */ + #ifndef _UCONTEXT_H #define _UCONTEXT_H 1 #include <features.h> +#ifdef __UCLIBC_HAS_CONTEXT_FUNCS__ + /* Get machine dependent definition of data structures. */ #include <sys/ucontext.h> -/* The System V ABI user-level context switching support functions - * are marked obsolescent by SuSv3, and are not implemented by - * uClibc. This header is therefore empty. */ +__BEGIN_DECLS + +/* Get user context and store it in variable pointed to by UCP. */ +extern int getcontext (ucontext_t *__ucp) __THROW; + +/* Set user context from information of variable pointed to by UCP. */ +extern int setcontext (const ucontext_t *__ucp) __THROW; + +/* Save current context in context variable pointed to by OUCP and set + context from variable pointed to by UCP. */ +extern int swapcontext (ucontext_t *__restrict __oucp, + const ucontext_t *__restrict __ucp) __THROW; + +/* Manipulate user context UCP to continue with calling functions FUNC + and the ARGC-1 parameters following ARGC when the context is used + the next time in `setcontext' or `swapcontext'. + + We cannot say anything about the parameters FUNC takes; `void' + is as good as any other choice. */ +extern void makecontext (ucontext_t *__ucp, void (*__func) (void), + int __argc, ...) __THROW; + +__END_DECLS +#endif #endif /* ucontext.h */ |