diff options
Diffstat (limited to 'ports')
| -rw-r--r-- | ports/ChangeLog.tile | 4 | ||||
| -rw-r--r-- | ports/sysdeps/tile/nptl/pthread_spin_unlock.c | 33 |
2 files changed, 37 insertions, 0 deletions
diff --git a/ports/ChangeLog.tile b/ports/ChangeLog.tile index 99e95db..06f24c2 100644 --- a/ports/ChangeLog.tile +++ b/ports/ChangeLog.tile @@ -1,3 +1,7 @@ +2012-11-06 Chris Metcalf <cmetcalf@tilera.com> + + * sysdeps/tile/nptl/pthread_spin_unlock.c: New file. + 2012-11-05 Chris Metcalf <cmetcalf@tilera.com> * sysdeps/tile/math_private.h: Provide additional no-op defines diff --git a/ports/sysdeps/tile/nptl/pthread_spin_unlock.c b/ports/sysdeps/tile/nptl/pthread_spin_unlock.c new file mode 100644 index 0000000..260f6fa --- /dev/null +++ b/ports/sysdeps/tile/nptl/pthread_spin_unlock.c @@ -0,0 +1,33 @@ +/* pthread_spin_unlock -- unlock a spin lock. Tile version. + Copyright (C) 2012 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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" +#include <atomic.h> + +int +pthread_spin_unlock (pthread_spinlock_t *lock) +{ +#ifdef __tilegx__ + /* Use exchange() to bypass the write buffer. */ + atomic_exchange_rel (lock, 0); +#else + atomic_full_barrier (); + *lock = 0; +#endif + return 0; +} |