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| author | Maxim Kuvyrkov <maxim@codesourcery.com> | 2012-08-15 16:29:06 -0700 |
|---|---|---|
| committer | Maxim Kuvyrkov <maxim@codesourcery.com> | 2012-08-15 16:29:06 -0700 |
| commit | ef4009734b84903615be28b38638c166e5455692 (patch) | |
| tree | 93062b1f67b1c46ffa1c0cf35f882623ec7aeb39 /ports/sysdeps/arm/nptl/pthread_spin_lock.c | |
| parent | 329bc0186823da075e1a41aab9a4cdc78fb858aa (diff) | |
| download | glibc-ef4009734b84903615be28b38638c166e5455692.tar.gz | |
Add generic versions of pthread_spin_lock and pthread_spin_trylock.
Diffstat (limited to 'ports/sysdeps/arm/nptl/pthread_spin_lock.c')
| -rw-r--r-- | ports/sysdeps/arm/nptl/pthread_spin_lock.c | 18 |
1 files changed, 6 insertions, 12 deletions
diff --git a/ports/sysdeps/arm/nptl/pthread_spin_lock.c b/ports/sysdeps/arm/nptl/pthread_spin_lock.c index 3a23bd31a5..4f81571735 100644 --- a/ports/sysdeps/arm/nptl/pthread_spin_lock.c +++ b/ports/sysdeps/arm/nptl/pthread_spin_lock.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2008 Free Software Foundation, Inc. +/* Copyright (C) 2008-2012 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 @@ -15,15 +15,9 @@ License along with the GNU C Library. If not, see <http://www.gnu.org/licenses/>. */ -#include <atomic.h> -#include "pthreadP.h" +#define SPIN_LOCK_READS_BETWEEN_CMPXCHG 1000 -int -pthread_spin_lock (pthread_spinlock_t *lock) -{ - while (atomic_compare_and_exchange_val_acq (lock, 1, 0) != 0) - while (*lock != 0) - ; - - return 0; -} +/* We can't use the normal "#include <nptl/pthread_spin_lock.c>" because + it will resolve to this very file. Using "sysdeps/.." as reference to the + top level directory does the job. */ +#include <sysdeps/../nptl/pthread_spin_lock.c> |