//
// Note that the important point isn't really the pointer to the Frame itself,
// it's the resources it's representing that need to go back to the allocator.
+//
+// FIXME: There's an issue here in that we could be releasing a frame while
+// we're still uploading textures from it, causing it to be written to in
+// another thread. (Thankfully, it goes to the back of the queue, and there's
+// usually a render in-between, meaning it's fairly unlikely that someone
+// actually managed to get to that race.) We should probably have some mechanism
+// for registering fences.
+
+#include <memory>
-#include "bmusb.h"
+#include "bmusb/bmusb.h"
-void release_refcounted_frame(FrameAllocator::Frame *frame);
+void release_refcounted_frame(bmusb::FrameAllocator::Frame *frame);
-typedef std::shared_ptr<FrameAllocator::Frame> RefCountedFrameBase;
+typedef std::shared_ptr<bmusb::FrameAllocator::Frame> RefCountedFrameBase;
class RefCountedFrame : public RefCountedFrameBase {
public:
RefCountedFrame() {}
- RefCountedFrame(const FrameAllocator::Frame &frame)
- : RefCountedFrameBase(new FrameAllocator::Frame(frame), release_refcounted_frame) {}
+ RefCountedFrame(const bmusb::FrameAllocator::Frame &frame)
+ : RefCountedFrameBase(new bmusb::FrameAllocator::Frame(frame), release_refcounted_frame) {}
+};
+
+// Similar to RefCountedFrame, but as unique_ptr instead of shared_ptr.
+
+struct Unique_frame_deleter {
+ void operator() (bmusb::FrameAllocator::Frame *frame) const {
+ release_refcounted_frame(frame);
+ }
+};
+
+typedef std::unique_ptr<bmusb::FrameAllocator::Frame, Unique_frame_deleter>
+ UniqueFrameBase;
+
+class UniqueFrame : public UniqueFrameBase {
+public:
+ UniqueFrame() {}
+
+ UniqueFrame(const bmusb::FrameAllocator::Frame &frame)
+ : UniqueFrameBase(new bmusb::FrameAllocator::Frame(frame)) {}
+
+ bmusb::FrameAllocator::Frame get_and_release()
+ {
+ bmusb::FrameAllocator::Frame *ptr = release();
+ if (ptr == nullptr) {
+ return bmusb::FrameAllocator::Frame();
+ } else {
+ bmusb::FrameAllocator::Frame frame = *ptr;
+ delete ptr;
+ return frame;
+ }
+ }
};
#endif // !defined(_REF_COUNTED_FRAME_H)