fixed atomic issues with buffers

Author: chc

code/core/OS/Buffer.cpp

@@ -39,9 +39,7 @@ namespace OS {
 			resetCursors();
 		}
 		Buffer::~Buffer() {
-			mp_ctx->DecRef();
-			int ref = mp_ctx->GetRefCount();
-			if (ref == 0) {
+			if (mp_ctx->DecRef() == 0) {
 				delete mp_ctx;
 			}
 		}	

code/core/OS/Buffer.h

@@ -60,8 +60,7 @@ namespace OS {
 
 			Buffer &operator=(const Buffer& val) {
 				if(mp_ctx) {
-					mp_ctx->DecRef();
-					if (mp_ctx->GetRefCount() == 0) {
+					if (mp_ctx->DecRef() == 0) {
 						delete mp_ctx;
 					}
 				}

code/core/OS/Net/NetPeer.cpp

@@ -137,8 +137,8 @@ void INetPeer::CloseSocket() {
 }
 void INetPeer::close_callback(uv_handle_t *handle) {
     INetPeer *peer = (INetPeer *)uv_handle_get_data(handle);
-    peer->DecRef();
-    if(peer->GetRefCount() == 0) {
+    
+    if(peer->DecRef() == 0) {
         delete peer;
     }
 

code/core/OS/Ref.h

@@ -5,8 +5,8 @@ namespace OS {
 	class Ref {
 		public:
 			Ref() { m_ref_count.store(1); };
-			void DecRef() { m_ref_count--; };
-			void IncRef() { m_ref_count++; };
+			uint32_t DecRef() { return m_ref_count.fetch_sub(1)-1; };
+			uint32_t IncRef() { return m_ref_count.fetch_add(1)+1; };
 			int GetRefCount() { return m_ref_count.load(); };
 		private:
 			std::atomic<uint32_t> m_ref_count;