From cccb07d903ad7ddcbbfdbafb107dcc7129ddafdb Mon Sep 17 00:00:00 2001 From: drahn Date: Mon, 9 Feb 2004 13:14:34 +0000 Subject: Add arm support files for libpthread. --- lib/libpthread/arch/arm/_atomic_lock.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) create mode 100644 lib/libpthread/arch/arm/_atomic_lock.c (limited to 'lib/libpthread/arch/arm/_atomic_lock.c') diff --git a/lib/libpthread/arch/arm/_atomic_lock.c b/lib/libpthread/arch/arm/_atomic_lock.c new file mode 100644 index 00000000000..81797dcaa7f --- /dev/null +++ b/lib/libpthread/arch/arm/_atomic_lock.c @@ -0,0 +1,18 @@ +/* $OpenBSD: _atomic_lock.c,v 1.1 2004/02/09 13:14:34 drahn Exp $ */ +/* + * Atomic lock for powerpc + */ + +#include "spinlock.h" + +int +_atomic_lock(volatile _spinlock_lock_t *lock) +{ + _spinlock_lock_t old; + + __asm__("swp %0, %2, [%1]" + : "=r" (old), "=r" (lock) + : "r" (_SPINLOCK_LOCKED), "1" (lock) ); + + return (old != _SPINLOCK_UNLOCKED); +} -- cgit v1.2.3-59-g8ed1b