diff options
Diffstat (limited to 'src/include/smp/spinlock.h')
| -rw-r--r-- | src/include/smp/spinlock.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/src/include/smp/spinlock.h b/src/include/smp/spinlock.h new file mode 100644 index 0000000000..9e0f8af0a9 --- /dev/null +++ b/src/include/smp/spinlock.h @@ -0,0 +1,24 @@ +#ifndef SMP_SPINLOCK_H +#define SMP_SPINLOCK_H + +#ifdef SMP +#include <arch/smp/spinlock.h> +#else /* !SMP */ + +/* Most GCC versions have a nasty bug with empty initializers */ +#if (__GNUC__ > 2) +typedef struct { } spinlock_t; +#define SPIN_LOCK_UNLOCKED (spinlock_t) { } +#else +typedef struct { int gcc_is_buggy; } spinlock_t; +#define SPIN_LOCK_UNLOCKED (spinlock_t) { 0 } +#endif + +#define barrier() do {} while(0) +#define spin_is_locked(lock) 0 +#define spin_unlock_wait(lock) do {} while(0) +#define spin_lock(lock) do {} while(0) +#define spin_unlock(lock) do {} while(0) +#endif + +#endif /* SMP_SPINLOCK_H */ |