* apt-pkg/deb/dpkgpm.cc:

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

diff --git a/apt-pkg/contrib/mmap.h b/apt-pkg/contrib/mmap.h
index 3cb6c646898a51c09001a2f3e4e39d7d3320c5e2..5ca951204b393ab5c2b20045035b48bd94a43f04 100644 (file)
--- a/apt-pkg/contrib/mmap.h
+++ b/apt-pkg/contrib/mmap.h
@@ -1,6 +1,6 @@
 // -*- mode: cpp; mode: fold -*-
 // Description                                                         /*{{{*/
 // -*- mode: cpp; mode: fold -*-
 // Description                                                         /*{{{*/

-// $Id: mmap.h,v 1.8 1999/01/18 06:20:08 jgg Exp $
+// $Id: mmap.h,v 1.12 2001/05/14 05:16:43 jgg Exp $

 /* ######################################################################
    
    MMap Class - Provides 'real' mmap or a faked mmap using read().
 /* ######################################################################
    
    MMap Class - Provides 'real' mmap or a faked mmap using read().


@@ -25,28 +25,37 @@
 #ifndef PKGLIB_MMAP_H
 #define PKGLIB_MMAP_H
 
 #ifndef PKGLIB_MMAP_H
 #define PKGLIB_MMAP_H
 

-#ifdef __GNUG__
-#pragma interface "apt-pkg/mmap.h"
-#endif

 
 #include <string>
 #include <apt-pkg/fileutl.h>
 
 
 #include <string>
 #include <apt-pkg/fileutl.h>
 

+using std::string;
+
+/* This should be a 32 bit type, larger tyes use too much ram and smaller
+   types are too small. Where ever possible 'unsigned long' should be used
+   instead of this internal type */
+typedef unsigned int map_ptrloc;
+

 class MMap
 {
    protected:
    
 class MMap
 {
    protected:
    

-   FileFd &Fd;
-   unsigned long Flags;   
+   unsigned long Flags;

    unsigned long iSize;
    void *Base;
 
    unsigned long iSize;
    void *Base;
 

-   bool Map();
-   bool Close(bool DoClose = true,bool DoSync = true);
+   // 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:
 
    
    public:
 

-   enum OpenFlags {NoImmMap = (1<<0),Public = (1<<1),ReadOnly = (1<<2)};
+   enum OpenFlags {NoImmMap = (1<<0),Public = (1<<1),ReadOnly = (1<<2),
+                   UnMapped = (1<<3), Moveable = (1<<4), Fallback = (1 << 5)};

       
    // Simple accessors
    inline operator void *() {return Base;};
       
    // Simple accessors
    inline operator void *() {return Base;};


@@ -58,6 +67,7 @@ class MMap
    bool Sync(unsigned long Start,unsigned long Stop);
    
    MMap(FileFd &F,unsigned long Flags);
    bool Sync(unsigned long Start,unsigned long Stop);
    
    MMap(FileFd &F,unsigned long Flags);

+   MMap(unsigned long Flags);

    virtual ~MMap();
 };
 
    virtual ~MMap();
 };
 


@@ -75,20 +85,28 @@ class DynamicMMap : public MMap
    
    protected:
    
    
    protected:
    

+   FileFd *Fd;

    unsigned long WorkSpace;
    unsigned long WorkSpace;

+   unsigned long const GrowFactor;
+   unsigned long const Limit;

    Pool *Pools;
    unsigned int PoolCount;
    Pool *Pools;
    unsigned int PoolCount;

+
+   bool Grow();

    
    public:
 
    // Allocation
    unsigned long RawAllocate(unsigned long Size,unsigned long Aln = 0);
    unsigned long Allocate(unsigned long ItemSize);
    
    public:
 
    // Allocation
    unsigned long RawAllocate(unsigned long Size,unsigned long Aln = 0);
    unsigned long Allocate(unsigned long ItemSize);

-   unsigned long WriteString(const char *String,unsigned long Len = 0);
-   inline unsigned long WriteString(string S) {return WriteString(S.begin(),S.size());};
-   void UsePools(Pool &P,unsigned int Count) {Pools = &P; PoolCount = Count;}; 
+   unsigned long WriteString(const char *String,unsigned long Len = (unsigned long)-1);
+   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(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();
 };
 
    virtual ~DynamicMMap();
 };