Dentry.h

#ifndef CEPH_CLIENT_DENTRY_H
#define CEPH_CLIENT_DENTRY_H

#include "include/lru.h"

class Dir;
class Inode;

class Dentry : public LRUObject {
 public:
  string  name;                      // sort of lame
  //const char *name;
  Dir     *dir;
  Inode   *inode;
  int     ref;                       // 1 if there's a dir beneath me.
  uint64_t offset;
  int lease_mds;
  utime_t lease_ttl;
  uint64_t lease_gen;
  ceph_seq_t lease_seq;
  int cap_shared_gen;
  
  /*
   * ref==1 -> cached, unused
   * ref >1 -> pinned in lru
   */
  void get() { 
    assert(ref > 0);
    if (++ref == 2)
      lru_pin(); 
    //cout << "dentry.get on " << this << " " << name << " now " << ref << std::endl;
  }
  void put() { 
    assert(ref > 0);
    if (--ref == 1)
      lru_unpin();
    //cout << "dentry.put on " << this << " " << name << " now " << ref << std::endl;
    if (ref == 0)
      delete this;
  }
  
  Dentry() : dir(0), inode(0), ref(1), offset(0), lease_mds(-1), lease_gen(0), lease_seq(0), cap_shared_gen(0) { }
private:
  ~Dentry() {
    assert(ref == 0);
  }
};





#endif