1 /* Data structures for user-level context switching. Generic version. 2 Copyright (C) 1997-2021 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 4 5 The GNU C Library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 The GNU C Library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with the GNU C Library; if not, see 17 <https://www.gnu.org/licenses/>. */ 18 19 /* This file's definitions suffice for any platform where all 20 the machine-specific state is described in `struct sigcontext', but 21 use of struct sigcontext does not conform to POSIX namespace 22 requirements. */ 23 24 #ifndef _SYS_UCONTEXT_H 25 #define _SYS_UCONTEXT_H 1 26 27 #include <features.h> 28 29 #include <bits/types/sigset_t.h> 30 #include <bits/sigcontext.h> 31 #include <bits/types/stack_t.h> 32 33 34 typedef struct sigcontext mcontext_t; 35 36 #ifdef __USE_MISC 37 # define __ctx(fld) fld 38 #else 39 # define __ctx(fld) __ ## fld 40 #endif 41 42 /* Userlevel context. */ 43 typedef struct ucontext_t 44 { 45 unsigned long int __ctx(uc_flags); 46 struct ucontext_t *uc_link; 47 stack_t uc_stack; 48 mcontext_t uc_mcontext; 49 sigset_t uc_sigmask; 50 } ucontext_t; 51 52 #undef __ctx 53 54 #endif /* sys/ucontext.h */ 55