This patch adds definitions for the {get,set,make,swap}context
user-space context manipulation functions. These declarations are made
conditional to the enabling of UCLIBC_HAS_CONTEXT_FUNCS. Base on a
initial patch by Carmelo Amoroso.Signed-off-by: Carmelo Amoroso <carmelo.amor...@st.com> Signed-off-by: Florian Fainelli <flor...@openwrt.org> --- include/ucontext.h | 29 ++++++++++++++++++++++++++--- 1 file changed, 26 insertions(+), 3 deletions(-) diff --git a/include/ucontext.h b/include/ucontext.h index 14a1270..3974290 100644 --- a/include/ucontext.h +++ b/include/ucontext.h @@ -23,9 +23,32 @@ /* 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. */ +#ifdef __UCLIBC_HAS_CONTEXT_FUNCS__ +__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 */ -- 1.7.10.4 _______________________________________________ uClibc mailing list uClibc@uclibc.org http://lists.busybox.net/mailman/listinfo/uclibc
