[SERVER] Use reference counting for uplink

First step towards less locking for proxy mode

1 files changed, 25 insertions, 0 deletions

diff --git a/src/server/reftypes.h b/src/server/reftypes.h
new file mode 100644
index 0000000..45c0c20
--- /dev/null
+++ b/src/server/reftypes.h
@@ -0,0 +1,25 @@
+#ifndef _REFTYPES_H_
+#define _REFTYPES_H_
+
+#include <stdatomic.h>
+
+_Static_assert( sizeof( void * ) == sizeof( _Atomic( void * ) ), "Atomic pointer bad" );
+
+typedef _Atomic( void * ) weakref;
+
+#define aligned_ref(ptr) \
+	((union _aligned_ref_ *)((ptr) - (uintptr_t)(ptr) % sizeof(union _aligned_ref_)))
+
+union _aligned_ref_ {
+	struct _ref_ *ref;
+	void *_padding[( 32 - 1 ) / sizeof( void * ) + 1];
+};
+
+typedef struct _ref_ {
+	_Atomic long count;
+	void ( *free )( struct _ref_ * );
+	char _padding[sizeof( union _aligned_ref_ )];
+	char _aligned_ref[sizeof( union _aligned_ref_ )];
+} ref;
+
+#endif