merged from lp:~donkult/apt/experimental

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

diff --git a/apt-pkg/contrib/mmap.cc b/apt-pkg/contrib/mmap.cc
index d710662435e5c21e20f52ba09720eef9c603f18c..a110a70195cd39783705f2f6096dbd69645f609f 100644 (file)
--- a/apt-pkg/contrib/mmap.cc
+++ b/apt-pkg/contrib/mmap.cc
@@ -17,20 +17,21 @@
                                                                        /*}}}*/
 // Include Files                                                       /*{{{*/
 #define _BSD_SOURCE
+#include <config.h>
+
 #include <apt-pkg/mmap.h>
 #include <apt-pkg/error.h>
 
-#include <apti18n.h>
-
 #include <sys/mman.h>
 #include <sys/stat.h>
 #include <unistd.h>
 #include <fcntl.h>
 #include <stdlib.h>
 #include <errno.h>
-
 #include <cstring>
-                                                                       /*}}}*/
+
+#include <apti18n.h>
+                                                                       /*}}}*/
 
 // MMap::MMap - Constructor                                            /*{{{*/
 // ---------------------------------------------------------------------
@@ -94,7 +95,7 @@ bool MMap::Map(FileFd &Fd)
            return false;
       }
       else
-        return _error->Errno("mmap",_("Couldn't make mmap of %lu bytes"),
+        return _error->Errno("mmap",_("Couldn't make mmap of %llu bytes"),
                              iSize);
      }
 
@@ -106,7 +107,7 @@ bool MMap::Map(FileFd &Fd)
 /* */
 bool MMap::Close(bool DoSync)
 {
-   if ((Flags & UnMapped) == UnMapped || Base == 0 || iSize == 0)
+   if ((Flags & UnMapped) == UnMapped || validData() == false || iSize == 0)
       return true;
    
    if (DoSync == true)
@@ -165,7 +166,7 @@ bool MMap::Sync(unsigned long Start,unsigned long Stop)
       return true;
    
 #ifdef _POSIX_SYNCHRONIZED_IO
-   unsigned long PSize = sysconf(_SC_PAGESIZE);
+   unsigned long long PSize = sysconf(_SC_PAGESIZE);
    if ((Flags & ReadOnly) != ReadOnly)
    {
       if (SyncToFd != 0)
@@ -176,7 +177,7 @@ bool MMap::Sync(unsigned long Start,unsigned long Stop)
       }
       else
       {
-        if (msync((char *)Base+(int)(Start/PSize)*PSize,Stop - Start,MS_SYNC) < 0)
+        if (msync((char *)Base+(unsigned long long)(Start/PSize)*PSize,Stop - Start,MS_SYNC) < 0)
            return _error->Errno("msync", _("Unable to synchronize mmap"));
       }
    }
@@ -196,7 +197,7 @@ DynamicMMap::DynamicMMap(FileFd &F,unsigned long Flags,unsigned long const &Work
    if (_error->PendingError() == true)
       return;
    
-   unsigned long EndOfFile = Fd->Size();
+   unsigned long long EndOfFile = Fd->Size();
    if (EndOfFile > WorkSpace)
       WorkSpace = EndOfFile;
    else if(WorkSpace > 0)
@@ -225,23 +226,31 @@ DynamicMMap::DynamicMMap(unsigned long Flags,unsigned long const &WorkSpace,
 
        // disable Moveable if we don't grow
        if (Grow == 0)
-               Flags &= ~Moveable;
+               this->Flags &= ~Moveable;
 
 #ifndef __linux__
        // kfreebsd doesn't have mremap, so we use the fallback
-       if ((Flags & Moveable) == Moveable)
-               Flags |= Fallback;
+       if ((this->Flags & Moveable) == Moveable)
+               this->Flags |= Fallback;
 #endif
 
 #ifdef _POSIX_MAPPED_FILES
-       if ((Flags & Fallback) != Fallback) {
+       if ((this->Flags & Fallback) != Fallback) {
                // Set the permissions.
                int Prot = PROT_READ;
+#ifdef MAP_ANONYMOUS
                int Map = MAP_PRIVATE | MAP_ANONYMOUS;
-               if ((Flags & ReadOnly) != ReadOnly)
+#else
+               int Map = MAP_PRIVATE | MAP_ANON;
+#endif
+               if ((this->Flags & ReadOnly) != ReadOnly)
                        Prot |= PROT_WRITE;
-               if ((Flags & Public) == Public)
+               if ((this->Flags & Public) == Public)
+#ifdef MAP_ANONYMOUS
                        Map = MAP_SHARED | MAP_ANONYMOUS;
+#else
+                       Map = MAP_SHARED | MAP_ANON;
+#endif
 
                // use anonymous mmap() to get the memory
                Base = (unsigned char*) mmap(0, WorkSpace, Prot, Map, -1, 0);
@@ -266,6 +275,8 @@ DynamicMMap::~DynamicMMap()
 {
    if (Fd == 0)
    {
+      if (validData() == false)
+        return;
 #ifdef _POSIX_MAPPED_FILES
       munmap(Base, WorkSpace);
 #else
@@ -274,7 +285,7 @@ DynamicMMap::~DynamicMMap()
       return;
    }
    
-   unsigned long EndOfFile = iSize;
+   unsigned long long EndOfFile = iSize;
    iSize = WorkSpace;
    Close(false);
    if(ftruncate(Fd->Fd(),EndOfFile) < 0)
@@ -284,9 +295,9 @@ DynamicMMap::~DynamicMMap()
 // DynamicMMap::RawAllocate - Allocate a raw chunk of unaligned space  /*{{{*/
 // ---------------------------------------------------------------------
 /* This allocates a block of memory aligned to the given size */
-unsigned long DynamicMMap::RawAllocate(unsigned long Size,unsigned long Aln)
+unsigned long DynamicMMap::RawAllocate(unsigned long long Size,unsigned long Aln)
 {
-   unsigned long Result = iSize;
+   unsigned long long Result = iSize;
    if (Aln != 0)
       Result += Aln - (iSize%Aln);
 
@@ -314,7 +325,7 @@ unsigned long DynamicMMap::Allocate(unsigned long ItemSize)
    // Look for a matching pool entry
    Pool *I;
    Pool *Empty = 0;
-   for (I = Pools; I != Pools + PoolCount; I++)
+   for (I = Pools; I != Pools + PoolCount; ++I)
    {
       if (I->ItemSize == 0)
         Empty = I;
@@ -342,7 +353,11 @@ unsigned long DynamicMMap::Allocate(unsigned long ItemSize)
    {
       const unsigned long size = 20*1024;
       I->Count = size/ItemSize;
+      Pool* oldPools = Pools;
       Result = RawAllocate(size,ItemSize);
+      if (Pools != oldPools)
+        I += Pools - oldPools;
+
       // Does the allocation failed ?
       if (Result == 0 && _error->PendingError())
         return 0;
@@ -365,7 +380,7 @@ unsigned long DynamicMMap::WriteString(const char *String,
    if (Len == (unsigned long)-1)
       Len = strlen(String);
 
-   unsigned long Result = RawAllocate(Len+1,0);
+   unsigned long const Result = RawAllocate(Len+1,0);
 
    if (Result == 0 && _error->PendingError())
       return 0;
@@ -394,17 +409,23 @@ bool DynamicMMap::Grow() {
        if (Limit != 0 && WorkSpace >= Limit)
                return _error->Error(_("Unable to increase the size of the MMap as the "
                                       "limit of %lu bytes is already reached."), Limit);
+       if (GrowFactor <= 0)
+               return _error->Error(_("Unable to increase size of the MMap as automatic growing is disabled by user."));
 
-       unsigned long const newSize = WorkSpace + 1024*1024;
+       unsigned long long const newSize = WorkSpace + GrowFactor;
 
        if(Fd != 0) {
                Fd->Seek(newSize - 1);
                char C = 0;
                Fd->Write(&C,sizeof(C));
        }
+
+       unsigned long const poolOffset = Pools - ((Pool*) Base);
+
        if ((Flags & Fallback) != Fallback) {
 #if defined(_POSIX_MAPPED_FILES) && defined(__linux__)
    #ifdef MREMAP_MAYMOVE
+
                if ((Flags & Moveable) == Moveable)
                        Base = mremap(Base, WorkSpace, newSize, MREMAP_MAYMOVE);
                else
@@ -425,6 +446,7 @@ bool DynamicMMap::Grow() {
                        return false;
        }
 
+       Pools =(Pool*) Base + poolOffset;
        WorkSpace = newSize;
        return true;
 }