Added some C11 atomic operations

Mainly to be used in spinlocks etc.

1 files changed, 23 insertions, 0 deletions

diff --git a/include/apos/lock.h b/include/apos/lock.h
new file mode 100644
index 0000000..b8983fa
--- /dev/null
+++ b/include/apos/lock.h
@@ -0,0 +1,23 @@
+#ifndef LOCK_H
+#define LOCK_H
+
+#include <apos/atomic.h>
+typedef atomic_int spinlock_t;
+
+#include <lock.h>
+
+static inline void spin_lock(spinlock_t *lck)
+{
+	do {
+		while (atomic_load_explicit(lck, memory_order_acquire))
+			optional_pause();
+
+	} while (atomic_exchange_explicit(lck, 1, memory_order_acq_rel));
+}
+
+static inline void spin_unlock(spinlock_t *lck)
+{
+	atomic_store_explicit(lck, 0, memory_order_release);
+}
+
+#endif /* LOCK_H */