initial commit. working on tasking

1 files changed, 18 insertions, 0 deletions

diff --git a/arch/x86_64/lock.c b/arch/x86_64/lock.c
new file mode 100644
index 0000000..b010ee6
--- /dev/null
+++ b/arch/x86_64/lock.c
@@ -0,0 +1,18 @@
+#include "lock.h"
+
+extern int _kernel_panic_unlock;
+
+void
+take_mutex(atomic_flag *lock)
+{
+    if(_kernel_panic_unlock) return;
+    while(atomic_flag_test_and_set(lock)) {
+        __builtin_ia32_pause();
+    }
+}
+
+void
+release_mutex(atomic_flag *lock)
+{
+    atomic_flag_clear(lock);
+}