Basic ringbuffer worker. Super hacky, not yet writing back to CPU.

src/xenia/gpu/ring_buffer_worker.h

@@ -0,0 +1,57 @@
+/**
+ ******************************************************************************
+ * Xenia : Xbox 360 Emulator Research Project                                 *
+ ******************************************************************************
+ * Copyright 2013 Ben Vanik. All rights reserved.                             *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+#ifndef XENIA_GPU_RING_BUFFER_WORKER_H_
+#define XENIA_GPU_RING_BUFFER_WORKER_H_
+
+#include <xenia/core.h>
+
+
+namespace xe {
+namespace gpu {
+
+
+class RingBufferWorker {
+public:
+  RingBufferWorker(xe_memory_ref memory);
+  virtual ~RingBufferWorker();
+
+  xe_memory_ref memory();
+
+  void Initialize(uint32_t ptr, uint32_t page_count);
+
+  void UpdateWritePointer(uint32_t value);
+
+protected:
+  static void ThreadStartThunk(RingBufferWorker* this_ptr) {
+    this_ptr->ThreadStart();
+  }
+  void ThreadStart();
+
+protected:
+  xe_memory_ref   memory_;
+  xe_thread_ref   thread_;
+  bool            running_;
+  HANDLE          read_ptr_index_event_;
+  HANDLE          write_ptr_index_event_;
+  
+  uint32_t        primary_buffer_ptr_;
+  uint32_t        primary_buffer_size_;
+  uint32_t        secondary_buffer_ptr_;
+  uint32_t        secondary_buffer_size_;
+  uint32_t        read_ptr_index_;
+  uint32_t        write_ptr_index_;
+};
+
+
+}  // namespace gpu
+}  // namespace xe
+
+
+#endif  // XENIA_GPU_RING_BUFFER_WORKER_H_