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

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

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