diff options
Diffstat (limited to 'ports/sysdeps/unix/sysv/linux/hppa/swapcontext.c')
| -rw-r--r-- | ports/sysdeps/unix/sysv/linux/hppa/swapcontext.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/ports/sysdeps/unix/sysv/linux/hppa/swapcontext.c b/ports/sysdeps/unix/sysv/linux/hppa/swapcontext.c new file mode 100644 index 0000000000..98cb39cf65 --- /dev/null +++ b/ports/sysdeps/unix/sysv/linux/hppa/swapcontext.c @@ -0,0 +1,42 @@ +/* Swap to new context. + Copyright (C) 2008 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Helge Deller <deller@gmx.de>, 2008. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + <http://www.gnu.org/licenses/>. */ + +#include <ucontext.h> + +extern int __getcontext (ucontext_t *ucp); +extern int __setcontext (const ucontext_t *ucp); + +int +__swapcontext (ucontext_t *oucp, const ucontext_t *ucp) +{ + /* Save the current machine context to oucp. */ + __getcontext (oucp); + + /* mark sc_sar flag to skip the setcontext call on reactivation. */ + if (oucp->uc_mcontext.sc_sar == 0) { + oucp->uc_mcontext.sc_sar++; + + /* Restore the machine context in ucp. */ + __setcontext (ucp); + } + + return 0; +} + +weak_alias (__swapcontext, swapcontext) |