Small fixes

2026-10-18 21:20:50 +02:00
parent 32f1ff25f7
commit 692d67e3cf
10 changed files with 46 additions and 4 deletions
@@ -17,6 +17,16 @@ void spin_lock(struct spinlock* spin) {
    }
 }

+bool spin_trylock(struct spinlock* spin) {
+    irq_lock();
+    uint32_t owner = atomic_load(&spin->owner, ATOMIC_RELAXED);
+    uint32_t expected = owner;
+    if (atomic_compare_exchange(&spin->next, &expected, owner + 1, ATOMIC_ACQUIRE, ATOMIC_RELAXED))
+        return true;
+    irq_unlock();
+    return false;
+}
+
 void spin_unlock(struct spinlock* spin) {
    uint32_t val = atomic_load(&spin->owner, ATOMIC_RELAXED);
    atomic_store(&spin->owner, val + 1, ATOMIC_RELEASE);