299 lines
7.1 KiB
C++
299 lines
7.1 KiB
C++
#include "caching/hint_array.h"
|
|
|
|
using namespace boost;
|
|
using namespace caching;
|
|
using namespace caching::hint_array_damage;
|
|
using namespace persistent_data;
|
|
|
|
//----------------------------------------------------------------
|
|
|
|
namespace {
|
|
template <uint32_t WIDTH>
|
|
struct hint_traits {
|
|
typedef unsigned char byte;
|
|
typedef byte disk_type[WIDTH];
|
|
typedef vector<byte> value_type;
|
|
typedef no_op_ref_counter<value_type> ref_counter;
|
|
|
|
// FIXME: slow copying for now
|
|
static void unpack(disk_type const &disk, value_type &value) {
|
|
value.resize(WIDTH);
|
|
for (unsigned byte = 0; byte < WIDTH; byte++)
|
|
value.at(byte) = disk[byte];
|
|
}
|
|
|
|
static void pack(value_type const &value, disk_type &disk) {
|
|
for (unsigned byte = 0; byte < WIDTH; byte++)
|
|
disk[byte] = value.at(byte);
|
|
}
|
|
};
|
|
|
|
|
|
// We've got into a bit of a mess here. Templates are compile
|
|
// time, and we don't know the hint width until run time. We're
|
|
// going to have to provide specialisation for all legal widths and
|
|
// use the appropriate one.
|
|
|
|
#define all_widths \
|
|
xx(4); xx(8); xx(12); xx(16); xx(20); xx(24); xx(28); xx(32);\
|
|
xx(36); xx(40); xx(44); xx(48); xx(52); xx(56); xx(60); xx(64); \
|
|
xx(68); xx(72); xx(76); xx(80); xx(84); xx(88); xx(92); xx(96); \
|
|
xx(100); xx(104); xx(108); xx(112); xx(116); xx(120); xx(124); xx(128);
|
|
|
|
template <uint32_t WIDTH>
|
|
shared_ptr<array_base> mk_array(transaction_manager::ptr tm) {
|
|
typedef hint_traits<WIDTH> traits;
|
|
typedef array<traits> ha;
|
|
|
|
shared_ptr<array_base> r = typename ha::ptr(new ha(tm, typename traits::ref_counter()));
|
|
|
|
return r;
|
|
}
|
|
|
|
shared_ptr<array_base> mk_array(transaction_manager::ptr tm, uint32_t width) {
|
|
switch (width) {
|
|
#define xx(n) case n: return mk_array<n>(tm)
|
|
|
|
all_widths
|
|
#undef xx
|
|
default:
|
|
throw runtime_error("invalid hint width");
|
|
}
|
|
|
|
// never get here
|
|
return shared_ptr<array_base>();
|
|
}
|
|
|
|
//--------------------------------
|
|
|
|
template <typename HA>
|
|
shared_ptr<HA>
|
|
downcast_array(shared_ptr<array_base> base) {
|
|
shared_ptr<HA> a = dynamic_pointer_cast<HA>(base);
|
|
if (!a)
|
|
throw runtime_error("internal error: couldn't cast hint array");
|
|
|
|
return a;
|
|
}
|
|
|
|
//--------------------------------
|
|
|
|
template <uint32_t WIDTH>
|
|
shared_ptr<array_base> mk_array(transaction_manager::ptr tm, block_address root, unsigned nr_entries) {
|
|
typedef hint_traits<WIDTH> traits;
|
|
typedef array<traits> ha;
|
|
|
|
shared_ptr<array_base> r = typename ha::ptr(new ha(tm, typename traits::ref_counter(), root, nr_entries));
|
|
|
|
return r;
|
|
}
|
|
|
|
shared_ptr<array_base> mk_array(transaction_manager::ptr tm, uint32_t width, block_address root, unsigned nr_entries) {
|
|
switch (width) {
|
|
#define xx(n) case n: return mk_array<n>(tm, root, nr_entries)
|
|
all_widths
|
|
#undef xx
|
|
default:
|
|
throw runtime_error("invalid hint width");
|
|
}
|
|
|
|
// never get here
|
|
return shared_ptr<array_base>();
|
|
}
|
|
|
|
//--------------------------------
|
|
|
|
template <uint32_t WIDTH>
|
|
void get_hint(shared_ptr<array_base> base, unsigned index, vector<unsigned char> &data) {
|
|
typedef hint_traits<WIDTH> traits;
|
|
typedef array<traits> ha;
|
|
|
|
shared_ptr<ha> a = downcast_array<ha>(base);
|
|
data = a->get(index);
|
|
}
|
|
|
|
void get_hint_(uint32_t width, shared_ptr<array_base> base, unsigned index, vector<unsigned char> &data) {
|
|
switch (width) {
|
|
#define xx(n) case n: return get_hint<n>(base, index, data)
|
|
all_widths
|
|
#undef xx
|
|
}
|
|
}
|
|
|
|
//--------------------------------
|
|
|
|
template <uint32_t WIDTH>
|
|
void set_hint(shared_ptr<array_base> base, unsigned index, vector<unsigned char> const &data) {
|
|
typedef hint_traits<WIDTH> traits;
|
|
typedef array<traits> ha;
|
|
|
|
shared_ptr<ha> a = downcast_array<ha>(base);
|
|
a->set(index, data);
|
|
}
|
|
|
|
void set_hint_(uint32_t width, shared_ptr<array_base> base,
|
|
unsigned index, vector<unsigned char> const &data) {
|
|
switch (width) {
|
|
#define xx(n) case n: return set_hint<n>(base, index, data)
|
|
all_widths
|
|
#undef xx
|
|
}
|
|
}
|
|
|
|
//--------------------------------
|
|
|
|
template <uint32_t WIDTH>
|
|
void grow(shared_ptr<array_base> base, unsigned new_nr_entries, vector<unsigned char> const &value) {
|
|
typedef hint_traits<WIDTH> traits;
|
|
typedef array<traits> ha;
|
|
|
|
shared_ptr<ha> a = downcast_array<ha>(base);
|
|
a->grow(new_nr_entries, value);
|
|
}
|
|
|
|
void grow_(uint32_t width, shared_ptr<array_base> base,
|
|
unsigned new_nr_entries, vector<unsigned char> const &value)
|
|
{
|
|
switch (width) {
|
|
#define xx(n) case n: return grow<n>(base, new_nr_entries, value)
|
|
all_widths
|
|
#undef xx
|
|
}
|
|
}
|
|
|
|
//--------------------------------
|
|
|
|
class value_adapter {
|
|
public:
|
|
value_adapter(hint_visitor &v)
|
|
: v_(v) {
|
|
}
|
|
|
|
virtual void visit(uint32_t index, std::vector<unsigned char> const &v) {
|
|
v_.visit(static_cast<block_address>(index), v);
|
|
}
|
|
|
|
private:
|
|
hint_visitor &v_;
|
|
};
|
|
|
|
struct no_op_visitor : public hint_visitor {
|
|
virtual void visit(block_address cblock, std::vector<unsigned char> const &v) {
|
|
}
|
|
};
|
|
|
|
class ll_damage_visitor {
|
|
public:
|
|
ll_damage_visitor(damage_visitor &v)
|
|
: v_(v) {
|
|
}
|
|
|
|
virtual void visit(array_detail::damage const &d) {
|
|
v_.visit(missing_hints(d.desc_, d.lost_keys_));
|
|
}
|
|
|
|
private:
|
|
damage_visitor &v_;
|
|
};
|
|
|
|
template <uint32_t WIDTH>
|
|
void walk_hints(shared_ptr<array_base> base, hint_visitor &hv, damage_visitor &dv) {
|
|
typedef hint_traits<WIDTH> traits;
|
|
typedef array<traits> ha;
|
|
|
|
shared_ptr<ha> a = downcast_array<ha>(base);
|
|
value_adapter vv(hv);
|
|
ll_damage_visitor ll(dv);
|
|
a->visit_values(vv, ll);
|
|
}
|
|
|
|
void walk_hints_(uint32_t width, shared_ptr<array_base> base,
|
|
hint_visitor &hv, damage_visitor &dv) {
|
|
switch (width) {
|
|
#define xx(n) case n: walk_hints<n>(base, hv, dv); break
|
|
all_widths
|
|
#undef xx
|
|
}
|
|
}
|
|
}
|
|
|
|
//----------------------------------------------------------------
|
|
|
|
missing_hints::missing_hints(std::string const desc, run<uint32_t> const &keys)
|
|
: damage(desc),
|
|
keys_(keys)
|
|
{
|
|
}
|
|
|
|
void
|
|
missing_hints::visit(damage_visitor &v) const
|
|
{
|
|
v.visit(*this);
|
|
}
|
|
|
|
//----------------------------------------------------------------
|
|
|
|
hint_array::hint_array(tm_ptr tm, unsigned width)
|
|
: width_(check_width(width)),
|
|
impl_(mk_array(tm, width))
|
|
{
|
|
}
|
|
|
|
hint_array::hint_array(hint_array::tm_ptr tm, unsigned width,
|
|
block_address root, unsigned nr_entries)
|
|
: width_(check_width(width)),
|
|
impl_(mk_array(tm, width, root, nr_entries))
|
|
{
|
|
}
|
|
|
|
block_address
|
|
hint_array::get_root() const
|
|
{
|
|
return impl_->get_root();
|
|
}
|
|
|
|
void
|
|
hint_array::get_hint(unsigned index, vector<unsigned char> &data) const
|
|
{
|
|
get_hint_(width_, impl_, index, data);
|
|
}
|
|
|
|
void
|
|
hint_array::set_hint(unsigned index, vector<unsigned char> const &data)
|
|
{
|
|
set_hint_(width_, impl_, index, data);
|
|
}
|
|
|
|
void
|
|
hint_array::grow(unsigned new_nr_entries, vector<unsigned char> const &value)
|
|
{
|
|
grow_(width_, impl_, new_nr_entries, value);
|
|
}
|
|
|
|
void
|
|
hint_array::walk(hint_visitor &hv, hint_array_damage::damage_visitor &dv)
|
|
{
|
|
walk_hints_(width_, impl_, hv, dv);
|
|
}
|
|
|
|
void
|
|
hint_array::check(hint_array_damage::damage_visitor &visitor)
|
|
{
|
|
no_op_visitor vv;
|
|
walk(vv, visitor);
|
|
}
|
|
|
|
uint32_t
|
|
hint_array::check_width(uint32_t width)
|
|
{
|
|
if (width % 4 || width == 0 || width > 128) {
|
|
ostringstream msg;
|
|
msg << "invalid hint width: " << width;
|
|
throw runtime_error(msg.str());
|
|
}
|
|
|
|
return width;
|
|
}
|
|
|
|
//----------------------------------------------------------------
|