Revert "[Tizen] Add codes for Dali Windows Backend"

[platform/core/uifw/dali-core.git] / dali / integration-api / lockless-buffer.cpp

diff --git a/dali/integration-api/lockless-buffer.cpp b/dali/integration-api/lockless-buffer.cpp
index a1a7541..b704dbc 100644 (file)
--- a/dali/integration-api/lockless-buffer.cpp
+++ b/dali/integration-api/lockless-buffer.cpp
@@ -50,8 +50,7 @@ void LocklessBuffer::Write( const unsigned char *src, size_t size )
   DALI_ASSERT_ALWAYS( size <= mSize );
 
   // set WRITING bit
-  BufferState currentState( std::atomic_fetch_or( &mState, WRITING ) );
-
+  BufferState currentState( __sync_fetch_and_or( &mState, WRITING ) );
   DALI_ASSERT_DEBUG( !(currentState & WRITING_MASK) ); // WRITING bit should never be set when we get here
 
   // copy data to current write buffer, negate state to get actual index (recap: R0W1 = 0, R1W0 = 1)
@@ -59,9 +58,9 @@ void LocklessBuffer::Write( const unsigned char *src, size_t size )
   memcpy( mBuffer[index], src, size );
 
   // unset WRITING bit, set UPDATED bit
-  BufferState writingState = static_cast<BufferState>(currentState | WRITING);
-  BufferState checkState = mState;
-  mState.compare_exchange_strong( writingState, static_cast<BufferState>(index | UPDATED) );
+  BufferState checkState = __sync_val_compare_and_swap( &mState,
+                                                        static_cast<BufferState>(currentState | WRITING),
+                                                        static_cast<BufferState>(index | UPDATED) );
 
   DALI_ASSERT_DEBUG( checkState & WRITING );
   (void)checkState; // Avoid unused variable warning
@@ -77,8 +76,9 @@ const unsigned char* LocklessBuffer::Read()
   {
     // Try to swap buffers.
     // This will set mState to 1 if readbuffer 0 was updated, 0 if readbuffer 1 was updated and fail if WRITING is set
-    BufferState writingState = static_cast<BufferState>(currentWriteBuf | UPDATED);
-    if( mState.compare_exchange_strong( writingState, static_cast<BufferState>(!currentWriteBuf) ) )
+    if( __sync_bool_compare_and_swap( &mState,
+                                      static_cast<BufferState>(currentWriteBuf | UPDATED),
+                                      static_cast<BufferState>(!currentWriteBuf) )  )
     {
       // swap successful
       return mBuffer[currentWriteBuf];