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This commit is contained in:
Joe Thornber
2014-07-25 10:35:04 +01:00
parent d9040949fc
commit b32908d5c2
11 changed files with 717 additions and 663 deletions
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54
persistent-data/block.tcc
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@@ -40,7 +40,7 @@ namespace {
unsigned const SECTOR_SHIFT = 9;
// FIXME: these will slow it down until we start doing async io.
int const OPEN_FLAGS = O_DIRECT | O_SYNC;
int const OPEN_FLAGS = O_DIRECT;
// FIXME: introduce a new exception for this, or at least lift this
// to exception.h
@@ -106,31 +106,27 @@ namespace {
namespace persistent_data {
template <uint32_t BlockSize>
block_manager<BlockSize>::block::block(block_cache *bc,
block_manager<BlockSize>::block::block(block_cache &bc,
block_address location,
block_type bt,
typename validator::ptr v,
bool zero)
: validator_(v),
bt_(bt),
dirty_(false),
unlocked_(false),
buffer_(0, true) // FIXME: we don't know if it's writeable here :(
: bc_(bc),
validator_(v),
bt_(bt),
dirty_(false),
unlocked_(false),
buffer_(0, true) // FIXME: we don't know if it's writeable here :(
{
if (zero) {
internal_ = block_cache_get(bc, location, GF_ZERO | GF_CAN_BLOCK);
if (!internal_)
throw std::runtime_error("Couldn't get block");
internal_ = &bc.get(location, block_cache::GF_ZERO | block_cache::GF_CAN_BLOCK);
dirty_ = true;
buffer_.set_data(internal_->get_data());
} else {
internal_ = block_cache_get(bc, location, GF_CAN_BLOCK);
if (!internal_)
throw std::runtime_error("Couldn't get block");
validator_->check(buffer_, internal_->index);
internal_ = &bc.get(location, block_cache::GF_CAN_BLOCK);
buffer_.set_data(internal_->get_data());
validator_->check(buffer_, internal_->get_index());
}
buffer_.set_data(internal_->data);
}
template <uint32_t BlockSize>
@@ -144,8 +140,9 @@ namespace persistent_data {
void
block_manager<BlockSize>::block::unlock()
{
validator_->prepare(buffer_, internal_->index);
block_cache_put(internal_, dirty_ ? PF_DIRTY : 0);
if (dirty_)
validator_->prepare(buffer_, internal_->get_index());
bc_.put(*internal_, dirty_ ? block_cache::PF_DIRTY : 0);
unlocked_ = true;
}
@@ -161,7 +158,7 @@ namespace persistent_data {
block_manager<BlockSize>::block::get_location() const
{
check_not_unlocked();
return internal_->index;
return internal_->get_index();
}
template <uint32_t BlockSize>
@@ -196,12 +193,12 @@ namespace persistent_data {
if (dirty_)
// It may have already happened, by calling
// this we ensure we're consistent.
validator_->prepare(*internal_->data, internal_->index);
validator_->prepare(*internal_->get_data(), internal_->get_index());
validator_ = v;
if (check)
validator_->check(*internal_->data, internal_->index);
validator_->check(*internal_->get_data(), internal_->get_index());
}
}
@@ -301,14 +298,9 @@ namespace persistent_data {
block_address nr_blocks,
unsigned max_concurrent_blocks,
mode m)
: fd_(open_block_file(path, nr_blocks * BlockSize, m == READ_WRITE)),
bc_(fd_, BlockSize >> SECTOR_SHIFT, nr_blocks, 1024u * 1024u * 4)
{
// Open the file descriptor
fd_ = open_block_file(path, nr_blocks * BlockSize, m == READ_WRITE);
// Create the cache
bc_ = block_cache_create(fd_, BlockSize << SECTOR_SHIFT, nr_blocks, 1024u * BlockSize * 1.2);
if (!bc_)
throw std::runtime_error("couldn't create block cache");
}
template <uint32_t BlockSize>
@@ -360,7 +352,7 @@ namespace persistent_data {
block_address
block_manager<BlockSize>::get_nr_blocks() const
{
return block_cache_get_nr_blocks(bc_);
return bc_.get_nr_blocks();
}
template <uint32_t BlockSize>
@@ -374,7 +366,7 @@ namespace persistent_data {
void
block_manager<BlockSize>::flush() const
{
block_cache_flush(bc_);
bc_.flush();
}
}