The FAST_STREAM_TRANSFERS compile time option has been removed due to lack of use and low cost/benefit ratio.

Add GCC_FORCE_POINTER_ACCESS() macro use to the RingBuffer library header, to attempt to force GCC into producing more efficient code for manipulating the buffers.

1 files changed, 9 insertions, 5 deletions

diff --git a/LUFA/Drivers/Misc/RingBuffer.h b/LUFA/Drivers/Misc/RingBuffer.h
index d9d3a8340..605f92c11 100644
--- a/LUFA/Drivers/Misc/RingBuffer.h
+++ b/LUFA/Drivers/Misc/RingBuffer.h
@@ -126,10 +126,10 @@
 		 */

 		static inline void RingBuffer_InitBuffer(RingBuffer_t* Buffer, uint8_t* const DataPtr, const uint16_t Size)

 		{

+			GCC_FORCE_POINTER_ACCESS(Buffer);

+

 			ATOMIC_BLOCK(ATOMIC_RESTORESTATE)

-			{

-				GCC_FORCE_POINTER_ACCESS(Buffer);

-				

+			{	

 				Buffer->In     = DataPtr;

 				Buffer->Out    = DataPtr;

 				Buffer->Start  = &DataPtr[0];

@@ -203,9 +203,11 @@
 		 *  \param[in,out] Buffer  Pointer to a ring buffer structure to insert into.

 		 *  \param[in]     Data    Data element to insert into the buffer.

 		 */

-		static inline void RingBuffer_Insert(RingBuffer_t* const Buffer,

+		static inline void RingBuffer_Insert(RingBuffer_t* Buffer,

 		                                     const uint8_t Data)

 		{

+			GCC_FORCE_POINTER_ACCESS(Buffer);

+

 			*Buffer->In = Data;

 

 			if (++Buffer->In == Buffer->End)

@@ -227,8 +229,10 @@
 		 *

 		 *  \return Next data element stored in the buffer.

 		 */

-		static inline uint8_t RingBuffer_Remove(RingBuffer_t* const Buffer)

+		static inline uint8_t RingBuffer_Remove(RingBuffer_t* Buffer)

 		{

+			GCC_FORCE_POINTER_ACCESS(Buffer);

+		

 			uint8_t Data = *Buffer->Out;

 

 			if (++Buffer->Out == Buffer->End)