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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#ifndef CEPH_LIBRBD_IO_FLUSH_TRACKER_H
#define CEPH_LIBRBD_IO_FLUSH_TRACKER_H
#include "include/int_types.h"
#include "common/ceph_mutex.h"
#include <atomic>
#include <list>
#include <map>
#include <set>
#include <unordered_map>
struct Context;
namespace librbd {
struct ImageCtx;
namespace io {
struct AioCompletion;
template <typename ImageCtxT>
class FlushTracker {
public:
FlushTracker(ImageCtxT* image_ctx);
~FlushTracker();
void shut_down();
uint64_t start_io(uint64_t tid);
void finish_io(uint64_t tid);
void flush(Context* on_finish);
private:
typedef std::list<Context*> Contexts;
typedef std::map<uint64_t, Contexts> FlushContexts;
typedef std::set<uint64_t> Tids;
typedef std::unordered_map<uint64_t, uint64_t> TidToFlushTid;
ImageCtxT* m_image_ctx;
std::atomic<uint32_t> m_next_flush_tid{0};
mutable ceph::shared_mutex m_lock;
TidToFlushTid m_tid_to_flush_tid;
Tids m_in_flight_flush_tids;
FlushContexts m_flush_contexts;
};
} // namespace io
} // namespace librbd
extern template class librbd::io::FlushTracker<librbd::ImageCtx>;
#endif // CEPH_LIBRBD_IO_FLUSH_TRACKER_H
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