X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/7b15b702b1f908595a2ae484117746587f8e03aa..2a49601f69e08f06fb2727d869d420daacdd09d5:/apt-pkg/contrib/mmap.cc

diff --git a/apt-pkg/contrib/mmap.cc b/apt-pkg/contrib/mmap.cc
index aaa9da44f..a176da636 100644
--- a/apt-pkg/contrib/mmap.cc
+++ b/apt-pkg/contrib/mmap.cc
@@ -102,6 +102,7 @@ bool MMap::Map(FileFd &Fd)
 	 {
 	    // for readonly, we don't need sync, so make it simple
 	    Base = malloc(iSize);
+	    SyncToFd = new FileFd();
 	    return Fd.Read(Base, iSize);
 	 }
 	 // FIXME: Writing to compressed fd's ?
@@ -155,11 +156,10 @@ bool MMap::Close(bool DoSync)
 /* This is done in syncronous mode - the docs indicate that this will 
    not return till all IO is complete */
 bool MMap::Sync()
-{   
+{
    if ((Flags & UnMapped) == UnMapped)
       return true;
-   
-#ifdef _POSIX_SYNCHRONIZED_IO   
+
    if ((Flags & ReadOnly) != ReadOnly)
    {
       if (SyncToFd != NULL)
@@ -169,11 +169,12 @@ bool MMap::Sync()
       }
       else
       {
+#ifdef _POSIX_SYNCHRONIZED_IO
 	 if (msync((char *)Base, iSize, MS_SYNC) < 0)
 	    return _error->Errno("msync", _("Unable to synchronize mmap"));
+#endif
       }
    }
-#endif   
    return true;
 }
 									/*}}}*/
@@ -184,9 +185,7 @@ bool MMap::Sync(unsigned long Start,unsigned long Stop)
 {
    if ((Flags & UnMapped) == UnMapped)
       return true;
-   
-#ifdef _POSIX_SYNCHRONIZED_IO
-   unsigned long long PSize = sysconf(_SC_PAGESIZE);
+
    if ((Flags & ReadOnly) != ReadOnly)
    {
       if (SyncToFd != 0)
@@ -197,11 +196,13 @@ bool MMap::Sync(unsigned long Start,unsigned long Stop)
       }
       else
       {
+#ifdef _POSIX_SYNCHRONIZED_IO
+	 unsigned long long const PSize = sysconf(_SC_PAGESIZE);
 	 if (msync((char *)Base+(unsigned long long)(Start/PSize)*PSize,Stop - Start,MS_SYNC) < 0)
 	    return _error->Errno("msync", _("Unable to synchronize mmap"));
+#endif
       }
    }
-#endif   
    return true;
 }
 									/*}}}*/