From c68d0fa2d88fc2134a38d99e7e944828384a7671 Mon Sep 17 00:00:00 2001 From: Austin Foxley Date: Sat, 17 Oct 2009 12:26:24 -0700 Subject: libpthread/nptl: core of the "Native Posix Threading Library" for uClibc targetting arm,sh,i386,mips,sparc for now Signed-off-by: Austin Foxley --- .../sysdeps/unix/sysv/linux/powerpc/sem_post.c | 42 ++++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 libpthread/nptl/sysdeps/unix/sysv/linux/powerpc/sem_post.c (limited to 'libpthread/nptl/sysdeps/unix/sysv/linux/powerpc/sem_post.c') diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/powerpc/sem_post.c b/libpthread/nptl/sysdeps/unix/sysv/linux/powerpc/sem_post.c new file mode 100644 index 000000000..06b3bd0ab --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/powerpc/sem_post.c @@ -0,0 +1,42 @@ +/* sem_post -- post to a POSIX semaphore. Powerpc version. + Copyright (C) 2003, 2004 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Paul Mackerras , 2003. + + 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include +#include +#include +#include +#include + +int +__new_sem_post (sem_t *sem) +{ + int *futex = (int *) sem; + + __asm __volatile (__lll_rel_instr ::: "memory"); + int nr = atomic_increment_val (futex); + int err = lll_futex_wake (futex, nr); + if (__builtin_expect (err, 0) < 0) + { + __set_errno (-err); + return -1; + } + return 0; +} +weak_alias(__new_sem_post, sem_post) -- cgit v1.2.3