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spinlock: insert return address into spinlock

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Matheus
2025-12-28 22:58:06 -03:00
parent 29641e50f8
commit 3420125d6d
1 changed files with 7 additions and 4 deletions
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kernel-src/include/spinlock.h
+7 -4
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@@ -4,19 +4,22 @@
#include <stdbool.h> #include <stdbool.h>
#include <kernel/interrupt.h> #include <kernel/interrupt.h>
typedef int spinlock_t; typedef uintptr_t spinlock_t;
#define SPINLOCK_INIT_VALUE 0 #define SPINLOCK_INIT_VALUE 0
#define SPINLOCK_INIT(x) x = SPINLOCK_INIT_VALUE #define SPINLOCK_INIT(x) x = SPINLOCK_INIT_VALUE
#define SPINLOCK_DEFINE(x) spinlock_t x = SPINLOCK_INIT_VALUE #define SPINLOCK_DEFINE(x) spinlock_t x = SPINLOCK_INIT_VALUE
static inline bool spinlock_try(spinlock_t *lock) { static inline bool spinlock_try(spinlock_t *lock) {
return __sync_bool_compare_and_swap(lock, 0, 1); spinlock_t expected = SPINLOCK_INIT_VALUE;
return __atomic_compare_exchange_n(lock, &expected, (uintptr_t)__builtin_return_address(0), false, __ATOMIC_ACQUIRE, __ATOMIC_RELAXED);
} }
static inline void spinlock_acquire(spinlock_t *lock) { static inline void spinlock_acquire(spinlock_t *lock) {
while (!__sync_bool_compare_and_swap(lock, 0, 1)) { spinlock_t expected = SPINLOCK_INIT_VALUE;
while (!__atomic_compare_exchange_n(lock, &expected, (uintptr_t)__builtin_return_address(0), false, __ATOMIC_ACQUIRE, __ATOMIC_RELAXED)) {
while (*lock) asm volatile ("pause" : : : "memory"); while (*lock) asm volatile ("pause" : : : "memory");
expected = SPINLOCK_INIT_VALUE;
} }
} }
@@ -27,7 +30,7 @@ static inline bool spinlock_acquire_irq_clear(spinlock_t *lock) {
} }
static inline void spinlock_release(spinlock_t *lock) { static inline void spinlock_release(spinlock_t *lock) {
*lock = 0; __atomic_store_n(lock, 0, __ATOMIC_RELEASE);
} }
static inline void spinlock_release_irq_restore(spinlock_t *lock, bool irqstate) { static inline void spinlock_release_irq_restore(spinlock_t *lock, bool irqstate) {