2007-11-28 Tatsuhiro Tsujikawa <tujikawa at rednoah dot com>

	Added direct I/O support. The current implementation uses O_DIRECT,
	which is not posix standard and is tested on linux 2.6.21.
	Currently only file allocation uses direct I/O.
	* src/SingleFileAllocationIterator.{h, cc}
	* test/SingleFileAllocationIteratorTest.cc
	* src/MultiFileAllocationIterator.{h, cc}
	* test/MultiFileAllocationIteratorTest.cc
	* src/BinaryStream.h
	* src/DiskWriter.h
	* src/AbstractDiskWriter.{h, cc}
	* src/ByteArrayDiskWriter.h
	* src/DiskAdaptor.h
	* src/AbstractSingleDiskAdaptor.{h, cc}
	* src/MultiDiskAdaptor.{h, cc}
	* src/FileAllocationEntry.cc
	* src/Util.{h, cc}
	* src/OptionHandlerFactory.cc
	* src/prefs.h
	* src/version_usage.cc
	* src/option_processing.cc

	Moved FileAllocationMan::markCurrentFileAllocationEntryDone() to
	handleException.
	* src/MultiFileAllocationIterator.cc

	Added EINTR handling
	* src/SocketCore.cc

1 files changed, 2 insertions, 0 deletions

diff --git a/src/BinaryStream.h b/src/BinaryStream.h
index 1d11d8e5..d16ac728 100644
--- a/src/BinaryStream.h
+++ b/src/BinaryStream.h
@@ -45,6 +45,8 @@ public:
   virtual void writeData(const unsigned char* data, int32_t len, int64_t offset) = 0;
 
   virtual int32_t readData(unsigned char* data, int32_t len, int64_t offset) = 0;
+
+  virtual void truncate(int64_t length) = 0;
 };
 
 typedef SharedHandle<BinaryStream> BinaryStreamHandle;