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API for transactions in libsg

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This commit is contained in:
krasimir
2015-09-02 13:01:23 +00:00
parent 73b41687c8
commit ef90fa4abe
2 changed files with 118 additions and 67 deletions
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175
src/runtime/c/sg/sg.c
View File

@@ -88,6 +88,45 @@ sg_shutdown()
sqlite3_shutdown(); sqlite3_shutdown();
} }
void
sg_begin_trans(SgSG* sg, GuExn* err)
{
sqlite3 *db = (sqlite3 *) sg;
int rc = sqlite3BtreeBeginTrans(db->aDb[0].pBt, 1);
if (rc != SQLITE_OK) {
sg_raise_sqlite(db, err);
return;
}
db->autoCommit = 0;
}
void
sg_commit(SgSG* sg, GuExn* err)
{
sqlite3 *db = (sqlite3 *) sg;
int rc = sqlite3BtreeCommit(db->aDb[0].pBt);
if (rc != SQLITE_OK) {
sg_raise_sqlite(db, err);
return;
}
db->autoCommit = 1;
}
void
sg_rollback(SgSG* sg, GuExn* err)
{
sqlite3 *db = (sqlite3 *) sg;
int rc = sqlite3BtreeRollback(db->aDb[0].pBt, SQLITE_ABORT_ROLLBACK, 0);
if (rc != SQLITE_OK) {
sg_raise_sqlite(db, err);
return;
}
db->autoCommit = 1;
}
static int static int
store_expr(StoreContext* ctxt, PgfExpr expr, SgId* pKey) store_expr(StoreContext* ctxt, PgfExpr expr, SgId* pKey)
{ {
@@ -280,10 +319,12 @@ sg_insert_expr(SgSG *sg, PgfExpr expr, GuExn* err)
} }
int rc; int rc;
rc = sqlite3BtreeBeginTrans(db->aDb[0].pBt, 1); if (db->autoCommit) {
if (rc != SQLITE_OK) { rc = sqlite3BtreeBeginTrans(db->aDb[0].pBt, 1);
sg_raise_sqlite(db, err); if (rc != SQLITE_OK) {
return 0; sg_raise_sqlite(db, err);
return 0;
}
} }
BtCursor crsExprs; BtCursor crsExprs;
@@ -359,10 +400,12 @@ sg_insert_expr(SgSG *sg, PgfExpr expr, GuExn* err)
goto rollback; goto rollback;
} }
rc = sqlite3BtreeCommit(db->aDb[0].pBt); if (db->autoCommit) {
if (rc != SQLITE_OK) { rc = sqlite3BtreeCommit(db->aDb[0].pBt);
sg_raise_sqlite(db, err); if (rc != SQLITE_OK) {
return 0; sg_raise_sqlite(db, err);
return 0;
}
} }
return key; return key;
@@ -379,7 +422,9 @@ close1:
sqlite3BtreeCloseCursor(&crsExprs); sqlite3BtreeCloseCursor(&crsExprs);
rollback: rollback:
sqlite3BtreeRollback(db->aDb[0].pBt, SQLITE_ABORT_ROLLBACK, 0); if (db->autoCommit) {
sqlite3BtreeRollback(db->aDb[0].pBt, SQLITE_ABORT_ROLLBACK, 0);
}
return 0; return 0;
} }
@@ -452,10 +497,12 @@ sg_select_expr(SgSG *sg, SgId key, GuPool* out_pool, GuExn* err)
} }
int rc; int rc;
rc = sqlite3BtreeBeginTrans(db->aDb[0].pBt, 0); if (db->autoCommit) {
if (rc != SQLITE_OK) { rc = sqlite3BtreeBeginTrans(db->aDb[0].pBt, 0);
sg_raise_sqlite(db, err); if (rc != SQLITE_OK) {
return gu_null_variant; sg_raise_sqlite(db, err);
return gu_null_variant;
}
} }
BtCursor crsExprs; BtCursor crsExprs;
@@ -479,10 +526,12 @@ sg_select_expr(SgSG *sg, SgId key, GuPool* out_pool, GuExn* err)
goto rollback; goto rollback;
} }
rc = sqlite3BtreeCommit(db->aDb[0].pBt); if (db->autoCommit) {
if (rc != SQLITE_OK) { rc = sqlite3BtreeCommit(db->aDb[0].pBt);
sg_raise_sqlite(db, err); if (rc != SQLITE_OK) {
goto rollback; sg_raise_sqlite(db, err);
goto rollback;
}
} }
return expr; return expr;
@@ -491,7 +540,9 @@ close:
sqlite3BtreeCloseCursor(&crsExprs); sqlite3BtreeCloseCursor(&crsExprs);
rollback: rollback:
sqlite3BtreeRollback(db->aDb[0].pBt, SQLITE_ABORT_ROLLBACK, 0); if (db->autoCommit) {
sqlite3BtreeRollback(db->aDb[0].pBt, SQLITE_ABORT_ROLLBACK, 0);
}
return gu_null_variant; return gu_null_variant;
} }
@@ -525,10 +576,12 @@ open_triples(sqlite3 *db, int wrFlag, BtCursor cursor[], int *n_cursors, GuExn*
} }
int rc; int rc;
rc = sqlite3BtreeBeginTrans(db->aDb[0].pBt, wrFlag); if (db->autoCommit) {
if (rc != SQLITE_OK) { rc = sqlite3BtreeBeginTrans(db->aDb[0].pBt, wrFlag);
sg_raise_sqlite(db, err); if (rc != SQLITE_OK) {
return; sg_raise_sqlite(db, err);
return;
}
} }
memset(cursor, 0, sizeof(BtCursor)*4); memset(cursor, 0, sizeof(BtCursor)*4);
@@ -553,7 +606,7 @@ open_triples(sqlite3 *db, int wrFlag, BtCursor cursor[], int *n_cursors, GuExn*
} }
static void static void
close_triples(sqlite3 *db, BtCursor cursor[], int *n_cursors) close_triples(sqlite3 *db, BtCursor cursor[], int *n_cursors, int rc, GuExn* err)
{ {
while (*n_cursors > 0) { while (*n_cursors > 0) {
(*n_cursors)--; (*n_cursors)--;
@@ -562,6 +615,18 @@ close_triples(sqlite3 *db, BtCursor cursor[], int *n_cursors)
} }
sqlite3BtreeCloseCursor(&cursor[*n_cursors]); sqlite3BtreeCloseCursor(&cursor[*n_cursors]);
} }
if (db->autoCommit) {
if (rc == SQLITE_OK || rc == SQLITE_DONE) {
rc = sqlite3BtreeCommit(db->aDb[0].pBt);
if (rc != SQLITE_OK) {
sg_raise_sqlite(db, err);
return;
}
} else {
sqlite3BtreeRollback(db->aDb[0].pBt, SQLITE_ABORT_ROLLBACK, 0);
}
}
} }
SgId SgId
@@ -600,7 +665,7 @@ sg_insert_triple(SgSG *sg, SgTriple triple, GuExn* err)
goto close; goto close;
} }
SgId key; SgId key = 0;
if (res == 0) { if (res == 0) {
rc = sqlite3VdbeIdxRowid(db, &cursor[0], &key); rc = sqlite3VdbeIdxRowid(db, &cursor[0], &key);
@@ -709,20 +774,9 @@ sg_insert_triple(SgSG *sg, SgTriple triple, GuExn* err)
} }
} }
close_triples(db, cursor, &n_cursors);
rc = sqlite3BtreeCommit(db->aDb[0].pBt);
if (rc != SQLITE_OK) {
sg_raise_sqlite(db, err);
goto close;
}
return key;
close: close:
close_triples(db, cursor, &n_cursors); close_triples(db, cursor, &n_cursors, rc, err);
sqlite3BtreeRollback(db->aDb[0].pBt, SQLITE_ABORT_ROLLBACK, 0); return key;
return 0;
} }
static int static int
@@ -770,10 +824,12 @@ sg_select_triple(SgSG *sg, SgId key, SgTriple triple, GuExn* err)
} }
int rc; int rc;
rc = sqlite3BtreeBeginTrans(db->aDb[0].pBt, 0); if (db->autoCommit) {
if (rc != SQLITE_OK) { rc = sqlite3BtreeBeginTrans(db->aDb[0].pBt, 0);
sg_raise_sqlite(db, err); if (rc != SQLITE_OK) {
return false; sg_raise_sqlite(db, err);
return false;
}
} }
BtCursor crsTriples; BtCursor crsTriples;
@@ -805,10 +861,12 @@ sg_select_triple(SgSG *sg, SgId key, SgTriple triple, GuExn* err)
goto rollback; goto rollback;
} }
rc = sqlite3BtreeCommit(db->aDb[0].pBt); if (db->autoCommit) {
if (rc != SQLITE_OK) { rc = sqlite3BtreeCommit(db->aDb[0].pBt);
sg_raise_sqlite(db, err); if (rc != SQLITE_OK) {
return false; sg_raise_sqlite(db, err);
return false;
}
} }
return (res == 0); return (res == 0);
@@ -817,7 +875,9 @@ close:
sqlite3BtreeCloseCursor(&crsTriples); sqlite3BtreeCloseCursor(&crsTriples);
rollback: rollback:
sqlite3BtreeRollback(db->aDb[0].pBt, SQLITE_ABORT_ROLLBACK, 0); if (db->autoCommit) {
sqlite3BtreeRollback(db->aDb[0].pBt, SQLITE_ABORT_ROLLBACK, 0);
}
return false; return false;
} }
@@ -897,20 +957,8 @@ sg_query_triple(SgSG *sg, SgTriple triple, GuExn* err)
return tres; return tres;
close: close:
close_triples(db, tres->cursors, &tres->n_cursors); close_triples(db, tres->cursors, &tres->n_cursors, rc, err);
free(tres); free(tres);
if (rc == SQLITE_OK) {
rc = sqlite3BtreeCommit(db->aDb[0].pBt);
if (rc != SQLITE_OK) {
sg_raise_sqlite(db, err);
return NULL;
}
} else {
sqlite3BtreeRollback(db->aDb[0].pBt, SQLITE_ABORT_ROLLBACK, 0);
}
return NULL; return NULL;
} }
@@ -995,14 +1043,7 @@ sg_triple_result_fetch(SgTripleResult* tres, SgId* pKey, SgTriple triple, GuExn*
void void
sg_triple_result_close(SgTripleResult* tres, GuExn* err) sg_triple_result_close(SgTripleResult* tres, GuExn* err)
{ {
close_triples(tres->db, tres->cursors, &tres->n_cursors); close_triples(tres->db, tres->cursors, &tres->n_cursors, SQLITE_OK, err);
int rc = sqlite3BtreeCommit(tres->db->aDb[0].pBt);
if (rc != SQLITE_OK) {
sg_raise_sqlite(tres->db, err);
return;
}
free(tres); free(tres);
} }

10
src/runtime/c/sg/sg.h
View File

@@ -14,6 +14,16 @@ sg_open(const char *filename, GuExn* err);
void void
sg_close(SgSG *sg, GuExn* err); sg_close(SgSG *sg, GuExn* err);
void
sg_begin_trans(SgSG* sg, GuExn* err);
void
sg_commit(SgSG* sg, GuExn* err);
void
sg_rollback(SgSG* sg, GuExn* err);
SgId SgId
sg_insert_expr(SgSG *sg, PgfExpr expr, GuExn* err); sg_insert_expr(SgSG *sg, PgfExpr expr, GuExn* err);