apt-pkg/cachefile.h

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: cachefile.h,v 1.3 1999/06/27 03:18:28 jgg Exp $
   4 /* ######################################################################
   5
   6    CacheFile - Simple wrapper class for opening, generating and whatnot
   7
   8    This class implements a simple 2 line mechanism to open various sorts
   9    of caches. It can operate as root, as not root, show progress and so on,
  10    it transparently handles everything necessary.
  11
  12    ##################################################################### */
  13                                                                         /*}}}*/
  14 #ifndef PKGLIB_CACHEFILE_H
  15 #define PKGLIB_CACHEFILE_H
  16
  17 #ifdef __GNUG__
  18 #pragma interface "apt-pkg/cachefile.h"
  19 #endif
  20
  21 #include <apt-pkg/depcache.h>
  22 #include <apt-pkg/dpkginit.h>
  23
  24 class pkgCacheFile
  25 {
  26    protected:
  27
  28    MMap *Map;
  29    pkgDepCache *Cache;
  30    pkgDpkgLock *Lock;
  31
  32    public:
  33
  34    // We look pretty much exactly like a pointer to a dep cache
  35    inline operator pkgDepCache &() {return *Cache;};
  36    inline operator pkgDepCache *() {return Cache;};
  37    inline pkgDepCache *operator ->() {return Cache;};
  38    inline pkgDepCache &operator *() {return *Cache;};
  39    inline pkgDepCache::StateCache &operator [](pkgCache::PkgIterator const &I) {return (*Cache)[I];};
  40    inline unsigned char &operator [](pkgCache::DepIterator const &I) {return (*Cache)[I];};
  41
  42    // Release the dpkg status lock
  43    inline void ReleaseLock() {Lock->Close();};
  44
  45    bool Open(OpProgress &Progress,bool WithLock = true);
  46
  47    pkgCacheFile();
  48    ~pkgCacheFile();
  49 };
  50
  51 #endif