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#pragma once
#include <seastar/core/future.hh>
#include "crimson/common/errorator.h"
#include "crimson/osd/object_context.h"
#include "crimson/osd/pg_backend.h"
namespace crimson::osd {
class ObjectContextLoader {
public:
using obc_accessing_list_t = boost::intrusive::list<
ObjectContext,
ObjectContext::obc_accessing_option_t>;
ObjectContextLoader(
ObjectContextRegistry& _obc_services,
PGBackend& _backend,
DoutPrefixProvider& dpp)
: obc_registry{_obc_services},
backend{_backend},
dpp{dpp}
{}
using load_obc_ertr = crimson::errorator<
crimson::ct_error::enoent,
crimson::ct_error::object_corrupted>;
using load_obc_iertr =
::crimson::interruptible::interruptible_errorator<
::crimson::osd::IOInterruptCondition,
load_obc_ertr>;
using with_obc_func_t =
std::function<load_obc_iertr::future<> (ObjectContextRef)>;
using with_both_obc_func_t =
std::function<load_obc_iertr::future<> (ObjectContextRef, ObjectContextRef)>;
// Use this variant by default
template<RWState::State State>
load_obc_iertr::future<> with_obc(hobject_t oid,
with_obc_func_t&& func);
// Use this variant in the case where the head object
// obc is already locked and only the clone obc is needed.
// Avoid nesting with_head_obc() calls by using with_clone_obc()
// with an already locked head.
template<RWState::State State>
load_obc_iertr::future<> with_clone_obc_only(ObjectContextRef head,
hobject_t oid,
with_obc_func_t&& func);
// Use this variant in the case where both the head
// object *and* the matching clone object are being used
// in func.
template<RWState::State State>
load_obc_iertr::future<> with_clone_obc_direct(
hobject_t oid,
with_both_obc_func_t&& func);
load_obc_iertr::future<> reload_obc(ObjectContext& obc) const;
void notify_on_change(bool is_primary);
private:
ObjectContextRegistry& obc_registry;
PGBackend& backend;
DoutPrefixProvider& dpp;
obc_accessing_list_t obc_set_accessing;
template<RWState::State State>
load_obc_iertr::future<> with_clone_obc(hobject_t oid,
with_obc_func_t&& func);
template<RWState::State State>
load_obc_iertr::future<> with_head_obc(ObjectContextRef obc,
bool existed,
with_obc_func_t&& func);
template<RWState::State State>
load_obc_iertr::future<ObjectContextRef>
get_or_load_obc(ObjectContextRef obc,
bool existed);
load_obc_iertr::future<ObjectContextRef>
load_obc(ObjectContextRef obc);
};
}
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