| 33,6 → 33,7 |
|---|
| #include <typedefs.h> |
| #include <preemption.h> |
| #include <arch/atomic.h> |
| #include <debug.h> |
| |
| #ifdef CONFIG_SMP |
| struct spinlock { |
| 66,12 → 67,36 |
|---|
| #endif |
| |
| extern void spinlock_initialize(spinlock_t *sl, char *name); |
| extern void spinlock_lock(spinlock_t *sl); |
| extern int spinlock_trylock(spinlock_t *sl); |
| extern void spinlock_unlock(spinlock_t *sl); |
| extern void spinlock_lock_debug(spinlock_t *sl); |
| |
| #ifdef CONFIG_DEBUG_SPINLOCK |
| # define spinlock_lock(x) spinlock_lock_debug(x) |
| #else |
| # define spinlock_lock(x) atomic_lock_arch(&(x)->val) |
| #endif |
| |
| /** Unlock spinlock |
| * |
| * Unlock spinlock. |
| * |
| * @param sl Pointer to spinlock_t structure. |
| */ |
| static inline void spinlock_unlock(spinlock_t *sl) |
| { |
| ASSERT(atomic_get(&sl->val) != 0); |
| |
| /* |
| * Prevent critical section code from bleeding out this way down. |
| */ |
| CS_LEAVE_BARRIER(); |
| |
| atomic_set(&sl->val,0); |
| preemption_enable(); |
| } |
| |
| #else |
| |
| /* On UP systems, spinlocks are effectively left out. */ |
| #define SPINLOCK_DECLARE(name) |
| #define SPINLOCK_INITIALIZE(name) |