From a9fe592842bfa17d91f4904d7fb0e3af3adebb17 Mon Sep 17 00:00:00 2001
From: David Kalnischkies <kalnischkies@gmail.com>
Date: Thu, 8 Jul 2010 15:28:53 +0200
Subject: * apt-pkg/pkgcachegen.{cc,h}:   - make the used MMap moveable (and
 therefore dynamic resizeable) by     applying (some) mad pointer magic
 (Closes: #195018)

---
 apt-pkg/pkgcachegen.h | 30 ++++++++++++++++++++++++------
 1 file changed, 24 insertions(+), 6 deletions(-)

(limited to 'apt-pkg/pkgcachegen.h')

diff --git a/apt-pkg/pkgcachegen.h b/apt-pkg/pkgcachegen.h
index 8f7739165..3bee1f958 100644
--- a/apt-pkg/pkgcachegen.h
+++ b/apt-pkg/pkgcachegen.h
@@ -23,6 +23,8 @@
 #include <apt-pkg/pkgcache.h>
 #include <apt-pkg/md5.h>
 
+#include <set>
+
 class pkgSourceList;
 class OpProgress;
 class MMap;
@@ -33,18 +35,32 @@ class pkgCacheGenerator							/*{{{*/
    private:
 
    pkgCache::StringItem *UniqHash[26];
-   unsigned long WriteStringInMap(std::string const &String) { return WriteStringInMap(String.c_str()); };
-   unsigned long WriteStringInMap(const char *String);
-   unsigned long WriteStringInMap(const char *String, const unsigned long &Len);
-   unsigned long AllocateInMap(const unsigned long &size);
+   map_ptrloc WriteStringInMap(std::string const &String) { return WriteStringInMap(String.c_str()); };
+   map_ptrloc WriteStringInMap(const char *String);
+   map_ptrloc WriteStringInMap(const char *String, const unsigned long &Len);
+   map_ptrloc AllocateInMap(const unsigned long &size);
 
    public:
    
    class ListParser;
    friend class ListParser;
-   
+
+   template<typename Iter> class Dynamic {
+      Iter *I;
+
+      public:
+      static std::set<Iter*> toReMap;
+      Dynamic(Iter &It) : I(&It) {
+	 toReMap.insert(I);
+      }
+
+      ~Dynamic() {
+	 toReMap.erase(I);
+      }
+   };
+
    protected:
-   
+
    DynamicMMap &Map;
    pkgCache Cache;
    OpProgress *Progress;
@@ -86,6 +102,8 @@ class pkgCacheGenerator							/*{{{*/
 			MMap **OutMap = 0,bool AllowMem = false);
    static bool MakeOnlyStatusCache(OpProgress *Progress,DynamicMMap **OutMap);
 
+   void ReMap(void const * const oldMap, void const * const newMap);
+
    pkgCacheGenerator(DynamicMMap *Map,OpProgress *Progress);
    ~pkgCacheGenerator();
 };
-- 
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