/*
* __session_close_cache --
* Close any cached handles in a session. Called holding the schema lock.
*/
static int
__session_close_cache(WT_SESSION_IMPL *session)
{
WT_BTREE_SESSION *btree_session;
WT_DECL_RET;
while ((btree_session = TAILQ_FIRST(&session->btrees)) != NULL)
WT_TRET(__wt_session_discard_btree(session, btree_session));
WT_TRET(__wt_schema_close_tables(session));
return (ret);
}
/*
* __session_close --
* WT_SESSION->close method.
*/
static int
__session_close(WT_SESSION *wt_session, const char *config)
{
WT_BTREE_SESSION *btree_session;
WT_CONNECTION_IMPL *conn;
WT_CURSOR *cursor;
WT_SESSION_IMPL *session, **tp;
int ret;
conn = (WT_CONNECTION_IMPL *)wt_session->connection;
session = (WT_SESSION_IMPL *)wt_session;
SESSION_API_CALL(session, close, config, cfg);
WT_UNUSED(cfg);
while ((cursor = TAILQ_FIRST(&session->cursors)) != NULL)
WT_TRET(cursor->close(cursor));
while ((btree_session = TAILQ_FIRST(&session->btrees)) != NULL)
WT_TRET(__wt_session_remove_btree(session, btree_session, 0));
WT_TRET(__wt_schema_close_tables(session));
__wt_spin_lock(session, &conn->spinlock);
/* Discard scratch buffers. */
__wt_scr_discard(session);
/* Confirm we're not holding any hazard references. */
__wt_hazard_empty(session);
/* Free the reconciliation information. */
__wt_rec_destroy(session);
/* Free the eviction exclusive-lock information. */
__wt_free(session, session->excl);
/* Destroy the thread's mutex. */
if (session->cond != NULL)
(void)__wt_cond_destroy(session, session->cond);
/*
* Replace the session reference we're closing with the last entry in
* the table, then clear the last entry. As far as the walk of the
* server threads is concerned, it's OK if the session appears twice,
* or if it doesn't appear at all, so these lines can race all they
* want.
*/
for (tp = conn->sessions; *tp != session; ++tp)
;
--conn->session_cnt;
*tp = conn->sessions[conn->session_cnt];
conn->sessions[conn->session_cnt] = NULL;
/*
* Publish, making the session array entry available for re-use. There
* must be a barrier here to ensure the cleanup above completes before
* the entry is re-used.
*/
WT_PUBLISH(session->iface.connection, NULL);
session = &conn->default_session;
__wt_spin_unlock(session, &conn->spinlock);
err:
API_END_NOTFOUND_MAP(session, ret);
}
