Created student weenix repository

1 files changed, 21 insertions, 0 deletions

diff --git a/kernel/proc/spinlock.c b/kernel/proc/spinlock.c
new file mode 100644
index 0000000..bf89b8e
--- /dev/null
+++ b/kernel/proc/spinlock.c
@@ -0,0 +1,21 @@
+#include "globals.h"
+#include "main/apic.h"
+
+void spinlock_init(spinlock_t *lock) { lock->s_locked = 0; }
+
+inline void spinlock_lock(spinlock_t *lock)
+{
+// __sync_bool_compare_and_swap is a GCC intrinsic for atomic compare-and-swap
+// If lock->locked is 0, then it is set to 1 and __sync_bool_compare_and_swap
+// returns true Otherwise, lock->locked is left at 1 and
+// __sync_bool_compare_and_swap returns false
+}
+
+inline void spinlock_unlock(spinlock_t *lock)
+{
+}
+
+inline long spinlock_ownslock(spinlock_t *lock)
+{
+    return 1;
+}