Initial community commit

Src/replicant/nu/lfitem.c

@@ -0,0 +1,25 @@
+#include "nu/lfitem.h"
+#include "foundation/atomics.h"
+
+void lfitem_init(lfitem_t item)
+{
+	item->item=0;
+}
+
+void *lfitem_get(lfitem_t item)
+{
+	return nx_atomic_swap_pointer(0, &(item->item));
+}
+
+void *lfitem_set(lfitem_t item, const void *value)
+{
+	return nx_atomic_swap_pointer((void *)value, &(item->item));
+}
+
+void *lfitem_set_if_zero(lfitem_t item, void *value)
+{
+	if (nx_atomic_cmpxchg_pointer(0, value, &(item->item)) == 0)
+		return 0;
+	else
+		return (void *)value;
+}