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block cache support.

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git-svn-id: https://profuse.googlecode.com/svn/branches/v2@220 aa027e90-d47c-11dd-86d7-074df07e0730
This commit is contained in:
ksherlock
2010-05-18 19:59:18 +00:00
parent be7a7bafc1
commit 629efe6da5
11 changed files with 92 additions and 14 deletions
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36
Device/UniversalDiskImage.cpp
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@@ -5,12 +5,17 @@
#include <ProFUSE/Exception.h>
#include <Cache/MappedBlockCache.h>
#include <Cache/ConcreteBlockCache.h>
using namespace Device;
using namespace LittleEndian;
using ProFUSE::Exception;
using ProFUSE::POSIXException;
/*
UniversalDiskImage::UniversalDiskImage(const char *name, bool readOnly) :
DiskImage(name, readOnly)
@@ -26,21 +31,23 @@ UniversalDiskImage::UniversalDiskImage(const char *name, bool readOnly) :
UniversalDiskImage::UniversalDiskImage(MappedFile *file) :
DiskImage(file)
{
unsigned blocks;
unsigned offset;
uint8_t * data = (uint8_t *)file->address();
_format = Read32(data, 0x0c);
_flags = Read32(data, 0x10);
_blocks = Read32(data, 0x14);
offset = Read32(data, 0x20);
blocks = Read32(data, 0x14);
_dataOffset = Read32(data, 0x18);
_dataLength = Read32(data, 0x1c);
setBlocks(blocks);
setBlocks(_blocks);
// TODO -- DO, Nibble support.
setAdaptor(new POAdaptor(offset + data));
setAdaptor(new POAdaptor(_dataOffset + data));
}
UniversalDiskImage *UniversalDiskImage::Create(const char *name, size_t blocks)
@@ -119,8 +126,8 @@ void UniversalDiskImage::Validate(MappedFile *file)
// TODO -- Dos Order, Nibble support.
if (Read32(data, 0x0c) != 1) break;
offset = Read32(data, 0x20);
blocks = Read32(data, 0x14);
offset = Read32(data, 0x18);
// file size == blocks * 512
if (Read32(data, 0x1c) != blocks * 512) break;
@@ -140,4 +147,17 @@ void UniversalDiskImage::Validate(MappedFile *file)
bool UniversalDiskImage::readOnly()
{
return (_flags & 0x8000000) || DiskImage::readOnly();
}
}
BlockCache *UniversalDiskImage::createBlockCache(unsigned size)
{
if (_format == 1)
{
return new MappedBlockCache(this, _dataOffset + (uint8_t *)address());
}
return DiskImage::createBlockCache(size);
}