1*53ee8cc1Swenshuai.xi /* Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc. 2*53ee8cc1Swenshuai.xi This file is part of the GNU C Library. 3*53ee8cc1Swenshuai.xi 4*53ee8cc1Swenshuai.xi The GNU C Library is free software; you can redistribute it and/or 5*53ee8cc1Swenshuai.xi modify it under the terms of the GNU Lesser General Public 6*53ee8cc1Swenshuai.xi License as published by the Free Software Foundation; either 7*53ee8cc1Swenshuai.xi version 2.1 of the License, or (at your option) any later version. 8*53ee8cc1Swenshuai.xi 9*53ee8cc1Swenshuai.xi The GNU C Library is distributed in the hope that it will be useful, 10*53ee8cc1Swenshuai.xi but WITHOUT ANY WARRANTY; without even the implied warranty of 11*53ee8cc1Swenshuai.xi MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12*53ee8cc1Swenshuai.xi Lesser General Public License for more details. 13*53ee8cc1Swenshuai.xi 14*53ee8cc1Swenshuai.xi You should have received a copy of the GNU Lesser General Public 15*53ee8cc1Swenshuai.xi License along with the GNU C Library; if not, write to the Free 16*53ee8cc1Swenshuai.xi Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 17*53ee8cc1Swenshuai.xi 02111-1307 USA. */ 18*53ee8cc1Swenshuai.xi 19*53ee8cc1Swenshuai.xi /* System V ABI compliant user-level context switching support. */ 20*53ee8cc1Swenshuai.xi 21*53ee8cc1Swenshuai.xi #ifndef _UCONTEXT_H 22*53ee8cc1Swenshuai.xi #define _UCONTEXT_H 1 23*53ee8cc1Swenshuai.xi 24*53ee8cc1Swenshuai.xi #include <features.h> 25*53ee8cc1Swenshuai.xi 26*53ee8cc1Swenshuai.xi /* Get machine dependent definition of data structures. */ 27*53ee8cc1Swenshuai.xi #include <sys/ucontext.h> 28*53ee8cc1Swenshuai.xi 29*53ee8cc1Swenshuai.xi __BEGIN_DECLS 30*53ee8cc1Swenshuai.xi 31*53ee8cc1Swenshuai.xi /* Get user context and store it in variable pointed to by UCP. */ 32*53ee8cc1Swenshuai.xi extern int getcontext (ucontext_t *__ucp) __THROW; 33*53ee8cc1Swenshuai.xi 34*53ee8cc1Swenshuai.xi /* Set user context from information of variable pointed to by UCP. */ 35*53ee8cc1Swenshuai.xi extern int setcontext (__const ucontext_t *__ucp) __THROW; 36*53ee8cc1Swenshuai.xi 37*53ee8cc1Swenshuai.xi /* Save current context in context variable pointed to by OUCP and set 38*53ee8cc1Swenshuai.xi context from variable pointed to by UCP. */ 39*53ee8cc1Swenshuai.xi extern int swapcontext (ucontext_t *__restrict __oucp, 40*53ee8cc1Swenshuai.xi __const ucontext_t *__restrict __ucp) __THROW; 41*53ee8cc1Swenshuai.xi 42*53ee8cc1Swenshuai.xi /* Manipulate user context UCP to continue with calling functions FUNC 43*53ee8cc1Swenshuai.xi and the ARGC-1 parameters following ARGC when the context is used 44*53ee8cc1Swenshuai.xi the next time in `setcontext' or `swapcontext'. 45*53ee8cc1Swenshuai.xi 46*53ee8cc1Swenshuai.xi We cannot say anything about the parameters FUNC takes; `void' 47*53ee8cc1Swenshuai.xi is as good as any other choice. */ 48*53ee8cc1Swenshuai.xi extern void makecontext (ucontext_t *__ucp, void (*__func) (void), 49*53ee8cc1Swenshuai.xi int __argc, ...) __THROW; 50*53ee8cc1Swenshuai.xi 51*53ee8cc1Swenshuai.xi __END_DECLS 52*53ee8cc1Swenshuai.xi 53*53ee8cc1Swenshuai.xi #endif /* ucontext.h */ 54