/*
* __wt_txn_global_init --
* Initialize the global transaction state.
*/
int
__wt_txn_global_init(WT_SESSION_IMPL *session, const char *cfg[])
{
WT_CONNECTION_IMPL *conn;
WT_TXN_GLOBAL *txn_global;
WT_TXN_STATE *s;
u_int i;
WT_UNUSED(cfg);
conn = S2C(session);
txn_global = &conn->txn_global;
txn_global->current = txn_global->last_running =
txn_global->oldest_id = WT_TXN_FIRST;
WT_RET(__wt_spin_init(session,
&txn_global->id_lock, "transaction id lock"));
WT_RET(__wt_rwlock_alloc(session,
&txn_global->nsnap_rwlock, "named snapshot lock"));
txn_global->nsnap_oldest_id = WT_TXN_NONE;
TAILQ_INIT(&txn_global->nsnaph);
WT_RET(__wt_calloc_def(
session, conn->session_size, &txn_global->states));
WT_CACHE_LINE_ALIGNMENT_VERIFY(session, txn_global->states);
for (i = 0, s = txn_global->states; i < conn->session_size; i++, s++)
s->id = s->snap_min = WT_TXN_NONE;
return (0);
}
/*
* __wt_connection_open --
* Open a connection.
*/
int
__wt_connection_open(WT_CONNECTION_IMPL *conn, const char *cfg[])
{
WT_SESSION_IMPL *session;
/* Default session. */
session = conn->default_session;
WT_ASSERT(session, session->iface.connection == &conn->iface);
/*
* Tell internal server threads to run: this must be set before opening
* any sessions.
*/
F_SET(conn, WT_CONN_SERVER_RUN | WT_CONN_LOG_SERVER_RUN);
/* WT_SESSION_IMPL array. */
WT_RET(__wt_calloc(session,
conn->session_size, sizeof(WT_SESSION_IMPL), &conn->sessions));
WT_CACHE_LINE_ALIGNMENT_VERIFY(session, conn->sessions);
/*
* Open the default session. We open this before starting service
* threads because those may allocate and use session resources that
* need to get cleaned up on close.
*/
WT_RET(__wt_open_internal_session(
conn, "connection", false, 0, &session));
/*
* The connection's default session is originally a static structure,
* swap that out for a more fully-functional session. It's necessary
* to have this step: the session allocation code uses the connection's
* session, and if we pass a reference to the default session as the
* place to store the allocated session, things get confused and error
* handling can be corrupted. So, we allocate into a stack variable
* and then assign it on success.
*/
conn->default_session = session;
/*
* Publish: there must be a barrier to ensure the connection structure
* fields are set before other threads read from the pointer.
*/
WT_WRITE_BARRIER();
/* Create the cache. */
WT_RET(__wt_cache_create(session, cfg));
/* Initialize transaction support. */
WT_RET(__wt_txn_global_init(session, cfg));
return (0);
}
/*
* __wt_log_slot_init --
* Initialize the slot array.
*/
int
__wt_log_slot_init(WT_SESSION_IMPL *session)
{
WT_CONNECTION_IMPL *conn;
WT_DECL_RET;
WT_LOG *log;
WT_LOGSLOT *slot;
int32_t i;
conn = S2C(session);
log = conn->log;
WT_CACHE_LINE_ALIGNMENT_VERIFY(session, log->slot_pool);
for (i = 0; i < WT_SLOT_POOL; i++)
log->slot_pool[i].slot_state = WT_LOG_SLOT_FREE;
/*
* Allocate memory for buffers now that the arrays are setup. Separate
* this from the loop above to make error handling simpler.
*/
/*
* !!! If the buffer size is too close to the log file size, we will
* switch log files very aggressively. Scale back the buffer for
* small log file sizes.
*/
log->slot_buf_size = (uint32_t)WT_MIN(
(size_t)conn->log_file_max / 10, WT_LOG_SLOT_BUF_SIZE);
for (i = 0; i < WT_SLOT_POOL; i++) {
WT_ERR(__wt_buf_init(session,
&log->slot_pool[i].slot_buf, log->slot_buf_size));
F_SET(&log->slot_pool[i], WT_SLOT_INIT_FLAGS);
}
WT_STAT_FAST_CONN_INCRV(session,
log_buffer_size, log->slot_buf_size * WT_SLOT_POOL);
/*
* Set up the available slot from the pool the first time.
*/
slot = &log->slot_pool[0];
/*
* We cannot initialize the release LSN in the activate function
* because that function can be called after a log file switch.
*/
slot->slot_release_lsn = log->alloc_lsn;
__wt_log_slot_activate(session, slot);
log->active_slot = slot;
if (0) {
err: while (--i >= 0)
__wt_buf_free(session, &log->slot_pool[i].slot_buf);
}
return (ret);
}
/*
* __wt_connection_init --
* Structure initialization for a just-created WT_CONNECTION_IMPL handle.
*/
int
__wt_connection_init(WT_CONNECTION_IMPL *conn)
{
WT_SESSION_IMPL *session;
u_int i;
session = conn->default_session;
for (i = 0; i < WT_HASH_ARRAY_SIZE; i++) {
TAILQ_INIT(&conn->dhhash[i]); /* Data handle hash lists */
TAILQ_INIT(&conn->fhhash[i]); /* File handle hash lists */
}
TAILQ_INIT(&conn->dhqh); /* Data handle list */
TAILQ_INIT(&conn->dlhqh); /* Library list */
TAILQ_INIT(&conn->dsrcqh); /* Data source list */
TAILQ_INIT(&conn->fhqh); /* File list */
TAILQ_INIT(&conn->collqh); /* Collator list */
TAILQ_INIT(&conn->compqh); /* Compressor list */
TAILQ_INIT(&conn->encryptqh); /* Encryptor list */
TAILQ_INIT(&conn->extractorqh); /* Extractor list */
TAILQ_INIT(&conn->lsmqh); /* WT_LSM_TREE list */
/* Setup the LSM work queues. */
TAILQ_INIT(&conn->lsm_manager.switchqh);
TAILQ_INIT(&conn->lsm_manager.appqh);
TAILQ_INIT(&conn->lsm_manager.managerqh);
/* Random numbers. */
__wt_random_init(&session->rnd);
/* Configuration. */
WT_RET(__wt_conn_config_init(session));
/* Statistics. */
WT_RET(__wt_stat_connection_init(session, conn));
/* Spinlocks. */
WT_RET(__wt_spin_init(session, &conn->api_lock, "api"));
WT_SPIN_INIT_TRACKED(session, &conn->checkpoint_lock, checkpoint);
WT_SPIN_INIT_TRACKED(session, &conn->dhandle_lock, handle_list);
WT_RET(__wt_spin_init(session, &conn->encryptor_lock, "encryptor"));
WT_RET(__wt_spin_init(session, &conn->fh_lock, "file list"));
WT_RET(__wt_spin_init(session, &conn->las_lock, "lookaside table"));
WT_SPIN_INIT_TRACKED(session, &conn->metadata_lock, metadata);
WT_RET(__wt_spin_init(session, &conn->reconfig_lock, "reconfigure"));
WT_SPIN_INIT_TRACKED(session, &conn->schema_lock, schema);
WT_SPIN_INIT_TRACKED(session, &conn->table_lock, table);
WT_RET(__wt_spin_init(session, &conn->turtle_lock, "turtle file"));
/* Read-write locks */
WT_RET(__wt_rwlock_alloc(
session, &conn->hot_backup_lock, "hot backup"));
WT_RET(__wt_calloc_def(session, WT_PAGE_LOCKS, &conn->page_lock));
WT_CACHE_LINE_ALIGNMENT_VERIFY(session, conn->page_lock);
for (i = 0; i < WT_PAGE_LOCKS; ++i)
WT_RET(
__wt_spin_init(session, &conn->page_lock[i], "btree page"));
/* Setup the spin locks for the LSM manager queues. */
WT_RET(__wt_spin_init(session,
&conn->lsm_manager.app_lock, "LSM application queue lock"));
WT_RET(__wt_spin_init(session,
&conn->lsm_manager.manager_lock, "LSM manager queue lock"));
WT_RET(__wt_spin_init(
session, &conn->lsm_manager.switch_lock, "LSM switch queue lock"));
WT_RET(__wt_cond_alloc(
session, "LSM worker cond", false, &conn->lsm_manager.work_cond));
/*
* Generation numbers.
*
* Start split generations at one. Threads publish this generation
* number before examining tree structures, and zero when they leave.
* We need to distinguish between threads that are in a tree before the
* first split has happened, and threads that are not in a tree.
*/
conn->split_gen = 1;
/*
* Block manager.
* XXX
* If there's ever a second block manager, we'll want to make this
* more opaque, but for now this is simpler.
*/
WT_RET(__wt_spin_init(session, &conn->block_lock, "block manager"));
for (i = 0; i < WT_HASH_ARRAY_SIZE; i++)
TAILQ_INIT(&conn->blockhash[i]);/* Block handle hash lists */
TAILQ_INIT(&conn->blockqh); /* Block manager list */
return (0);
}
