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authorMichael Vogt <michael.vogt@ubuntu.com>2012-08-28 12:00:57 +0200
committerMichael Vogt <michael.vogt@ubuntu.com>2012-08-28 12:00:57 +0200
commit88be391791cd77312f19816904ced54d308dd706 (patch)
treeb6703fffb3b4e30da8bcf2470587a31ab2c0b032 /apt-pkg/contrib/mmap.cc
parent4e5e7371044be194c545dc31c8a1d03ed1b659b4 (diff)
parentd7bc74a4e44c4ff97e70f15e19f86761687f2ca5 (diff)
merged from the debian-sid branch
Diffstat (limited to 'apt-pkg/contrib/mmap.cc')
-rw-r--r--apt-pkg/contrib/mmap.cc31
1 files changed, 21 insertions, 10 deletions
diff --git a/apt-pkg/contrib/mmap.cc b/apt-pkg/contrib/mmap.cc
index 593bb063b..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;
}
/*}}}*/
@@ -216,7 +217,17 @@ DynamicMMap::DynamicMMap(FileFd &F,unsigned long Flags,unsigned long const &Work
{
if (_error->PendingError() == true)
return;
-
+
+ // disable Moveable if we don't grow
+ if (Grow == 0)
+ this->Flags &= ~Moveable;
+
+#ifndef __linux__
+ // kfreebsd doesn't have mremap, so we use the fallback
+ if ((this->Flags & Moveable) == Moveable)
+ this->Flags |= Fallback;
+#endif
+
unsigned long long EndOfFile = Fd->Size();
if (EndOfFile > WorkSpace)
WorkSpace = EndOfFile;
@@ -328,7 +339,7 @@ unsigned long DynamicMMap::RawAllocate(unsigned long long Size,unsigned long Aln
if(!Grow())
{
_error->Fatal(_("Dynamic MMap ran out of room. Please increase the size "
- "of APT::Cache-Limit. Current value: %lu. (man 5 apt.conf)"), WorkSpace);
+ "of APT::Cache-Start. Current value: %lu. (man 5 apt.conf)"), WorkSpace);
return 0;
}
}