diff options
Diffstat (limited to 'REORG.TODO/sysdeps/powerpc/nptl/pthread_spin_lock.c')
| -rw-r--r-- | REORG.TODO/sysdeps/powerpc/nptl/pthread_spin_lock.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/powerpc/nptl/pthread_spin_lock.c b/REORG.TODO/sysdeps/powerpc/nptl/pthread_spin_lock.c new file mode 100644 index 0000000000..e377feb1cf --- /dev/null +++ b/REORG.TODO/sysdeps/powerpc/nptl/pthread_spin_lock.c @@ -0,0 +1,43 @@ +/* Copyright (C) 2003-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Paul Mackerras <paulus@au.ibm.com>, 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, see + <http://www.gnu.org/licenses/>. */ + +#include "pthreadP.h" + +int +pthread_spin_lock (pthread_spinlock_t *lock) +{ + unsigned int __tmp; + + asm volatile ( + "1: lwarx %0,0,%1" MUTEX_HINT_ACQ "\n" + " cmpwi 0,%0,0\n" + " bne- 2f\n" + " stwcx. %2,0,%1\n" + " bne- 2f\n" + __ARCH_ACQ_INSTR "\n" + " .subsection 1\n" + "2: lwzx %0,0,%1\n" + " cmpwi 0,%0,0\n" + " bne 2b\n" + " b 1b\n" + " .previous" + : "=&r" (__tmp) + : "r" (lock), "r" (1) + : "cr0", "memory"); + return 0; +} |