int se_reqread(sereq *r)
{
sereqarg *arg = &r->arg;
sedb *db = (sedb*)r->db;
uint32_t keysize;
void *key;
if (sslikely(arg->v.v)) {
keysize = sv_size(&arg->v);
key = sv_pointer(&arg->v);
} else {
keysize = 0;
key = NULL;
}
char *prefix;
uint32_t prefixsize;
if (arg->vprefix.v) {
void *vptr = sv_vpointer(arg->vprefix.v);
prefix = sf_key(vptr, 0);
prefixsize = sf_keysize(vptr, 0);
} else {
prefix = NULL;
prefixsize = 0;
}
if (sslikely(arg->vlsn_generate))
arg->vlsn = sr_seq(db->r.seq, SR_LSN);
sitx x;
si_begin(&x, &db->index, 1);
siread q;
si_readopen(&q, &x, arg->cache,
arg->order,
arg->vlsn,
prefix,
prefixsize, key, keysize);
if (arg->update)
si_readupdate(&q, &arg->vup, arg->update_eq);
if (arg->cache_only)
si_readcache_only(&q);
if (arg->has)
si_readhas(&q);
r->rc = si_read(&q);
r->read_disk = q.read_disk;
r->read_cache = q.read_cache;
r->v = q.result.v;
si_readclose(&q);
si_commit(&x);
return r->rc;
}
so *se_read(sedb *db, sedocument *o, sx *x, uint64_t vlsn,
sicache *cache)
{
se *e = se_of(&db->o);
uint64_t start = ss_utime();
/* prepare the key */
int auto_close = o->created <= 1;
int rc = se_document_createkey(o);
if (ssunlikely(rc == -1))
goto error;
rc = se_document_validate_ro(o, &db->o);
if (ssunlikely(rc == -1))
goto error;
if (ssunlikely(! se_active(e)))
goto error;
sv vup;
sv_init(&vup, &sv_vif, NULL, NULL);
sedocument *ret = NULL;
/* concurrent */
if (x && o->order == SS_EQ) {
/* note: prefix is ignored during concurrent
* index search */
int rc = sx_get(x, &db->coindex, &o->v, &vup);
if (ssunlikely(rc == -1 || rc == 2 /* delete */))
goto error;
if (rc == 1 && !sv_is(&vup, SVUPSERT)) {
ret = (sedocument*)se_document_new(e, &db->o, &vup);
if (sslikely(ret)) {
ret->cold_only = o->cold_only;
ret->created = 1;
ret->orderset = 1;
ret->flagset = 1;
} else {
sv_vunref(db->r, vup.v);
}
if (auto_close)
so_destroy(&o->o);
return &ret->o;
}
} else {
sx_get_autocommit(&e->xm, &db->coindex);
}
/* prepare read cache */
int cachegc = 0;
if (cache == NULL) {
cachegc = 1;
cache = si_cachepool_pop(&e->cachepool);
if (ssunlikely(cache == NULL)) {
if (vup.v)
sv_vunref(db->r, vup.v);
sr_oom(&e->error);
goto error;
}
}
sv_vref(o->v.v);
/* do read */
siread rq;
si_readopen(&rq, db->index, cache, o->order,
vlsn,
sv_pointer(&o->v),
vup.v,
o->prefix_copy,
o->prefix_size,
o->cold_only,
0,
start);
rc = si_read(&rq);
si_readclose(&rq);
/* prepare result */
if (rc == 1) {
ret = (sedocument*)se_readresult(e, &rq);
if (ret)
o->prefix_copy = NULL;
}
/* cleanup */
if (o->v.v)
sv_vunref(db->r, o->v.v);
if (vup.v)
sv_vunref(db->r, vup.v);
if (ret == NULL && rq.result.v)
sv_vunref(db->r, rq.result.v);
if (cachegc && cache)
si_cachepool_push(cache);
if (auto_close)
so_destroy(&o->o);
return &ret->o;
error:
if (auto_close)
so_destroy(&o->o);
return NULL;
}