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#ifndef FRAME_SPAN_HH_
#define FRAME_SPAN_HH_
#include "timestamp_pool.hh"
namespace low_latency {
// A class which contains timestamps that represent a Queue's contribution to
// a frame. It reduces the (possibly) huge amount of TimestampPool::Handle's
// that a queue needs to keep track of. It only keeps at max two - the first
// head handle and the tail handle, which is allowed to be null in the case of
// only a single submission for that queue.
class FrameSpan {
public:
const std::shared_ptr<TimestampPool::Handle> head_handle;
std::shared_ptr<TimestampPool::Handle> tail_handle;
public:
FrameSpan(std::shared_ptr<TimestampPool::Handle> handle);
FrameSpan(const FrameSpan&) = delete;
FrameSpan(FrameSpan&&) = delete;
FrameSpan operator=(const FrameSpan&) = delete;
FrameSpan operator=(FrameSpan&&) = delete;
~FrameSpan();
public:
// Update the framespan's tail to include this timestamp.
void update(std::shared_ptr<TimestampPool::Handle> handle);
public:
// Wait for for GPU work to complete.
void await_completed() const;
};
} // namespace low_latency
#endif
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