Source codes

1 files changed, 38 insertions, 0 deletions

diff --git a/ComLightLib/server/RefCounter.hpp b/ComLightLib/server/RefCounter.hpp
new file mode 100644
index 0000000..9698cc8
--- /dev/null
+++ b/ComLightLib/server/RefCounter.hpp
@@ -0,0 +1,38 @@
+#pragma once
+#include <atomic>
+#include <assert.h>
+#include <limits.h>
+
+namespace ComLight
+{
+	// Very base class of objects, implements reference counting.
+	class RefCounter
+	{
+		std::atomic_uint referenceCounter;
+
+	public:
+
+		RefCounter() : referenceCounter( 0 ) { }
+
+		inline virtual ~RefCounter() { }
+
+		RefCounter( const RefCounter &that ) = delete;
+		RefCounter( RefCounter &&that ) = delete;
+
+	protected:
+
+		uint32_t implAddRef()
+		{
+			return ++referenceCounter;
+		}
+
+		uint32_t implRelease()
+		{
+			// Might be a good idea to use locks, at least in debug builds. They're much slower than atomics, but with locks it's possible to detect when 2 threads call release at the same time, for object with counter = 1.
+			// It's a memory management bug, but it would be nice if debug builds would handle that case gracefully.
+			const uint32_t rc = --referenceCounter;
+			assert( rc != UINT_MAX );
+			return rc;
+		}
+	};
+}
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