diff --git a/include/bx/readerwriter.h b/include/bx/readerwriter.h
index 6489185..a0aafd6 100644
--- a/include/bx/readerwriter.h
+++ b/include/bx/readerwriter.h
@@ -136,7 +136,7 @@ namespace bx
 		{
 		}
 
-		virtual void* more(uint32_t _size = 0) BX_OVERRIDE
+		virtual void* more(uint32_t /*_size*/ = 0) BX_OVERRIDE
 		{
 			return m_data;
 		}
@@ -202,7 +202,7 @@ namespace bx
 			return m_pos;
 		}
 
-		virtual int32_t write(const void* _data, int32_t _size) BX_OVERRIDE
+		virtual int32_t write(const void* /*_data*/, int32_t _size) BX_OVERRIDE
 		{
 			int32_t morecore = int32_t(m_pos - m_top) + _size;
 
diff --git a/include/bx/ringbuffer.h b/include/bx/ringbuffer.h
index 844dff9..535db32 100644
--- a/include/bx/ringbuffer.h
+++ b/include/bx/ringbuffer.h
@@ -82,6 +82,10 @@ namespace bx
 		uint32_t m_current;
 		uint32_t m_write;
 		uint32_t m_read;
+
+	private:
+		RingBufferControl(const RingBufferControl&);
+		void operator=(const RingBufferControl&);
 	};
 
 	class SpScRingBufferControl
@@ -158,6 +162,10 @@ namespace bx
 		uint32_t m_current;
 		uint32_t m_write;
 		uint32_t m_read;
+
+	private:
+		SpScRingBufferControl(const SpScRingBufferControl&);
+		void operator=(const SpScRingBufferControl&);
 	};
 
 	template <typename Control>
diff --git a/include/bx/uint32_t.h b/include/bx/uint32_t.h
index 179ba4e..2bcab80 100644
--- a/include/bx/uint32_t.h
+++ b/include/bx/uint32_t.h
@@ -474,9 +474,9 @@ namespace bx
 		const uint32_t f_h_e_biased_flag          = uint32_li(0x0000008f);
 		const uint32_t f_s                        = uint32_and(ftou.ui, f_s_mask);
 		const uint32_t f_e                        = uint32_and(ftou.ui, f_e_mask);
-		const uint16_t h_s                        = uint32_srl(f_s, f_h_s_pos_offset);
+		const uint16_t h_s              = (uint16_t)uint32_srl(f_s, f_h_s_pos_offset);
 		const uint32_t f_m                        = uint32_and(ftou.ui, f_m_mask);
-		const uint16_t f_e_amount                 = uint32_srl(f_e, f_e_pos);
+		const uint16_t f_e_amount       = (uint16_t)uint32_srl(f_e, f_e_pos);
 		const uint32_t f_e_half_bias              = uint32_sub(f_e_amount, f_h_bias_offset);
 		const uint32_t f_snan                     = uint32_and(ftou.ui, f_snan_mask);
 		const uint32_t f_m_round_mask             = uint32_and(f_m, f_m_round_bit);