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ircd:Ⓜ️:event::refs: Add prefetch() to interface.

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This commit is contained in:
Jason Volk 2019-09-17 18:37:52 -07:00
parent 1cf54095b4
commit 26154de7c4
2 changed files with 41 additions and 1 deletions
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3
include/ircd/m/event/refs.h
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@ -38,6 +38,9 @@ struct ircd::m::event::refs
size_t count(const dbs::ref &type) const; size_t count(const dbs::ref &type) const;
size_t count() const; size_t count() const;
bool prefetch(const dbs::ref &type) const;
bool prefetch() const;
refs(const event::idx &idx) noexcept; refs(const event::idx &idx) noexcept;
static void rebuild(); static void rebuild();

39
ircd/m_event.cc
View file

@ -1891,6 +1891,43 @@ ircd::m::event::refs::rebuild()
txn(); txn();
} }
bool
ircd::m::event::refs::prefetch()
const
{
return prefetch(dbs::ref(-1));
}
bool
ircd::m::event::refs::prefetch(const dbs::ref &type)
const
{
if(unlikely(!idx))
return false;
// Allow -1 to iterate through all types by starting
// the iteration at type value 0 and then ignoring the
// type as a loop continue condition.
const bool all_type
{
type == dbs::ref(uint8_t(-1))
};
const auto &_type
{
all_type? dbs::ref::NEXT : type
};
static_assert(uint8_t(dbs::ref::NEXT) == 0);
char buf[dbs::EVENT_REFS_KEY_MAX_SIZE];
const string_view key
{
dbs::event_refs_key(buf, idx, _type, 0)
};
return db::prefetch(dbs::event_refs, key);
}
size_t size_t
ircd::m::event::refs::count() ircd::m::event::refs::count()
const const
@ -1965,7 +2002,7 @@ const
const bool all_type const bool all_type
{ {
type == dbs::ref(uint8_t(-1)) type == dbs::ref(uint8_t(-1))
}' };
const auto &_type const auto &_type
{ {