enable Hashes::AddFD() to skip creation of certain hashes

[apt.git] / apt-pkg / contrib / mmap.h

diff --git a/apt-pkg/contrib/mmap.h b/apt-pkg/contrib/mmap.h
index e329b167a7dec03de04917ecae887d9503a8e5d2..2bf2c15408319b3693a1e6b4dcf87e82e6ddb073 100644 (file)
--- a/apt-pkg/contrib/mmap.h
+++ b/apt-pkg/contrib/mmap.h
@@ -25,9 +25,6 @@
 #ifndef PKGLIB_MMAP_H
 #define PKGLIB_MMAP_H
 
-#ifdef __GNUG__
-#pragma interface "apt-pkg/mmap.h"
-#endif
 
 #include <string>
 #include <apt-pkg/fileutl.h>
@@ -47,18 +44,25 @@ class MMap
    unsigned long iSize;
    void *Base;
 
+   // In case mmap can not be used, we keep a dup of the file
+   // descriptor that should have been mmaped so that we can write to
+   // the file in Sync().
+   FileFd *SyncToFd;
+
    bool Map(FileFd &Fd);
    bool Close(bool DoSync = true);
    
    public:
 
    enum OpenFlags {NoImmMap = (1<<0),Public = (1<<1),ReadOnly = (1<<2),
-                   UnMapped = (1<<3)};
+                   UnMapped = (1<<3), Moveable = (1<<4), Fallback = (1 << 5)};
       
    // Simple accessors
    inline operator void *() {return Base;};
    inline void *Data() {return Base;}; 
    inline unsigned long Size() {return iSize;};
+   inline void AddSize(unsigned long const size) {iSize += size;};
+   inline bool validData() const { return Base != (void *)-1 && Base != 0; };
    
    // File manipulators
    bool Sync();
@@ -85,8 +89,12 @@ class DynamicMMap : public MMap
    
    FileFd *Fd;
    unsigned long WorkSpace;
+   unsigned long const GrowFactor;
+   unsigned long const Limit;
    Pool *Pools;
    unsigned int PoolCount;
+
+   bool Grow();
    
    public:
 
@@ -97,8 +105,10 @@ class DynamicMMap : public MMap
    inline unsigned long WriteString(const string &S) {return WriteString(S.c_str(),S.length());};
    void UsePools(Pool &P,unsigned int Count) {Pools = &P; PoolCount = Count;};
    
-   DynamicMMap(FileFd &F,unsigned long Flags,unsigned long WorkSpace = 2*1024*1024);
-   DynamicMMap(unsigned long Flags,unsigned long WorkSpace = 2*1024*1024);
+   DynamicMMap(FileFd &F,unsigned long Flags,unsigned long const &WorkSpace = 2*1024*1024,
+              unsigned long const &Grow = 1024*1024, unsigned long const &Limit = 0);
+   DynamicMMap(unsigned long Flags,unsigned long const &WorkSpace = 2*1024*1024,
+              unsigned long const &Grow = 1024*1024, unsigned long const &Limit = 0);
    virtual ~DynamicMMap();
 };