ROX-Filer/src/fscache.h

   1 /*
   2  * $Id$
   3  *
   4  * Thomas Leonard, <tal197@ecs.soton.ac.uk>
   5  */
   6
   7
   8 #ifndef _FSCACHE_H
   9 #define _FSCACHE_H
  10
  11 #include <sys/stat.h>
  12 #include <unistd.h>
  13 #include <stdlib.h>
  14 #include <time.h>
  15
  16 #include <glib.h>
  17
  18 typedef struct _GFSCache GFSCache;
  19 typedef struct _GFSCacheKey GFSCacheKey;
  20 typedef struct _GFSCacheData GFSCacheData;
  21 typedef gpointer (*GFSLoadFunc)(char *pathname, gpointer user_data);
  22 typedef void (*GFSRefFunc)(gpointer object, gpointer user_data);
  23 typedef int (*GFSGetRefFunc)(gpointer object, gpointer user_data);
  24 typedef void (*GFSUpdateFunc)(gpointer object,
  25                               char *pathname,
  26                               gpointer user_data);
  27
  28 struct _GFSCache
  29 {
  30
  31         GHashTable      *inode_to_stats;
  32         GFSLoadFunc     load;
  33         GFSRefFunc      ref;
  34         GFSRefFunc      unref;
  35         GFSGetRefFunc   getref;
  36         GFSUpdateFunc   update;
  37         gpointer        user_data;
  38 };
  39
  40 struct _GFSCacheKey
  41 {
  42         dev_t           device;
  43         ino_t           inode;
  44 };
  45
  46 struct _GFSCacheData
  47 {
  48         gpointer        data;           /* The object from the file */
  49         time_t          last_lookup;
  50
  51         /* Details of the file last time we checked it */
  52         time_t          m_time;
  53         off_t           length;
  54         mode_t          mode;
  55 };
  56
  57 GFSCache *g_fscache_new(GFSLoadFunc load,
  58                         GFSRefFunc ref,
  59                         GFSRefFunc unref,
  60                         GFSGetRefFunc getref,
  61                         GFSUpdateFunc update,
  62                         gpointer user_data);
  63 void g_fscache_destroy(GFSCache *cache);
  64 gpointer g_fscache_lookup(GFSCache *cache, char *pathname);
  65 void g_fscache_may_update(GFSCache *cache, char *pathname);
  66 void g_fscache_update(GFSCache *cache, char *pathname);
  67 void g_fscache_purge(GFSCache *cache, gint age);
  68
  69 void g_fscache_data_ref(GFSCache *cache, gpointer data);
  70 void g_fscache_data_unref(GFSCache *cache, gpointer data);
  71
  72 #endif /* _FSCACHE_H */