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/*-
* Copyright (c) 2014-present MongoDB, Inc.
* Copyright (c) 2008-2014 WiredTiger, Inc.
* All rights reserved.
*
* See the file LICENSE for redistribution information.
*/
#include "wt_internal.h"
/*
* __tiered_flush_state --
* Account for flush work units so threads can know when shared storage flushing is complete.
*/
static void
__tiered_flush_state(WT_SESSION_IMPL *session, uint32_t type, bool incr)
{
WT_CONNECTION_IMPL *conn;
if (type != WT_TIERED_WORK_FLUSH)
return;
conn = S2C(session);
if (incr)
(void)__wt_atomic_addv32(&conn->flush_state, 1);
else
(void)__wt_atomic_subv32(&conn->flush_state, 1);
}
/*
* __wt_tiered_work_free --
* Free a work unit and account for it in the flush state.
*/
void
__wt_tiered_work_free(WT_SESSION_IMPL *session, WT_TIERED_WORK_UNIT *entry)
{
WT_CONNECTION_IMPL *conn;
conn = S2C(session);
__tiered_flush_state(session, entry->type, false);
/* If all work is done signal any waiting thread waiting for sync. */
if (WT_FLUSH_STATE_DONE(conn->flush_state))
__wt_cond_signal(session, conn->flush_cond);
__wt_free(session, entry);
}
/*
* __wt_tiered_push_work --
* Push a work unit to the queue. Assumes it is passed an already filled out structure.
*/
void
__wt_tiered_push_work(WT_SESSION_IMPL *session, WT_TIERED_WORK_UNIT *entry)
{
WT_CONNECTION_IMPL *conn;
conn = S2C(session);
__wt_spin_lock(session, &conn->tiered_lock);
TAILQ_INSERT_TAIL(&conn->tieredqh, entry, q);
WT_STAT_CONN_INCR(session, tiered_work_units_created);
__wt_spin_unlock(session, &conn->tiered_lock);
__tiered_flush_state(session, entry->type, true);
__wt_cond_signal(session, conn->tiered_cond);
return;
}
/*
* __wt_tiered_pop_work --
* Pop a work unit of the given type from the queue. If a maximum value is given, only return a
* work unit that is less than the maximum value. The caller is responsible for freeing the
* returned work unit structure.
*/
void
__wt_tiered_pop_work(
WT_SESSION_IMPL *session, uint32_t type, uint64_t maxval, WT_TIERED_WORK_UNIT **entryp)
{
WT_CONNECTION_IMPL *conn;
WT_TIERED_WORK_UNIT *entry;
*entryp = entry = NULL;
conn = S2C(session);
if (TAILQ_EMPTY(&conn->tieredqh))
return;
__wt_spin_lock(session, &conn->tiered_lock);
TAILQ_FOREACH (entry, &conn->tieredqh, q) {
if (FLD_ISSET(type, entry->type) && (maxval == 0 || entry->op_val < maxval)) {
TAILQ_REMOVE(&conn->tieredqh, entry, q);
WT_STAT_CONN_INCR(session, tiered_work_units_dequeued);
*entryp = entry;
break;
}
}
__wt_spin_unlock(session, &conn->tiered_lock);
return;
}
/*
* __wt_tiered_get_flush --
* Get the first flush work unit from the queue. The id information cannot change between our
* caller and here. The caller is responsible for freeing the work unit.
*/
void
__wt_tiered_get_flush(WT_SESSION_IMPL *session, WT_TIERED_WORK_UNIT **entryp)
{
__wt_tiered_pop_work(session, WT_TIERED_WORK_FLUSH, 0, entryp);
return;
}
/*
* __wt_tiered_get_drop_local --
* Get a drop local work unit if it is less than the time given. The caller is responsible for
* freeing the work unit.
*/
void
__wt_tiered_get_drop_local(WT_SESSION_IMPL *session, uint64_t now, WT_TIERED_WORK_UNIT **entryp)
{
__wt_tiered_pop_work(session, WT_TIERED_WORK_DROP_LOCAL, now, entryp);
return;
}
/*
* __wt_tiered_get_drop_shared --
* Get a drop shared work unit. The caller is responsible for freeing the work unit.
*/
void
__wt_tiered_get_drop_shared(WT_SESSION_IMPL *session, WT_TIERED_WORK_UNIT **entryp)
{
__wt_tiered_pop_work(session, WT_TIERED_WORK_DROP_SHARED, 0, entryp);
return;
}
/*
* __wt_tiered_put_drop_local --
* Add a drop local work unit for the given ID to the queue.
*/
int
__wt_tiered_put_drop_local(WT_SESSION_IMPL *session, WT_TIERED *tiered, uint32_t id)
{
WT_TIERED_WORK_UNIT *entry;
uint64_t now;
WT_RET(__wt_calloc_one(session, &entry));
entry->type = WT_TIERED_WORK_DROP_LOCAL;
entry->id = id;
WT_ASSERT(session, tiered->bstorage != NULL);
__wt_seconds(session, &now);
/* Put a work unit in the queue with the time this object expires. */
entry->op_val = now + tiered->bstorage->retain_secs;
entry->tiered = tiered;
__wt_tiered_push_work(session, entry);
return (0);
}
/*
* __wt_tiered_put_drop_shared --
* Add a drop shared work unit for the given ID to the queue.
*/
int
__wt_tiered_put_drop_shared(WT_SESSION_IMPL *session, WT_TIERED *tiered, uint32_t id)
{
WT_TIERED_WORK_UNIT *entry;
WT_RET(__wt_calloc_one(session, &entry));
entry->type = WT_TIERED_WORK_DROP_SHARED;
entry->id = id;
entry->tiered = tiered;
__wt_tiered_push_work(session, entry);
return (0);
}
/*
* __wt_tiered_put_flush --
* Add a flush work unit to the queue. We're single threaded so the tiered structure's id
* information cannot change between our caller and here.
*/
int
__wt_tiered_put_flush(WT_SESSION_IMPL *session, WT_TIERED *tiered)
{
WT_TIERED_WORK_UNIT *entry;
WT_RET(__wt_calloc_one(session, &entry));
entry->type = WT_TIERED_WORK_FLUSH;
entry->id = tiered->current_id;
entry->tiered = tiered;
__wt_tiered_push_work(session, entry);
return (0);
}
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