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Merge pull request #331 from deltachat/disable-transactions

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disable transactions
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holger krekel 2018-09-27 22:53:37 +02:00 • committed by GitHub
commit a0dafac6b9
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1 changed files with 9 additions and 0 deletions
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9
src/dc_sqlite3.c
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@ -707,8 +707,12 @@ int dc_sqlite3_set_config_int(dc_sqlite3_t* sql, const char* key, int32_t value)
******************************************************************************/
#undef USE_TRANSACTIONS
void dc_sqlite3_begin_transaction(dc_sqlite3_t* sql)
{
#ifdef USE_TRANSACTIONS
// `BEGIN IMMEDIATE` ensures, only one thread may write.
// all other calls to `BEGIN IMMEDIATE` will try over until sqlite3_busy_timeout() is reached.
// CAVE: This also implies that transactions MUST NOT be nested.
@ -717,24 +721,29 @@ void dc_sqlite3_begin_transaction(dc_sqlite3_t* sql)
dc_sqlite3_log_error(sql, "Cannot begin transaction.");
}
sqlite3_finalize(stmt);
#endif
}
void dc_sqlite3_rollback(dc_sqlite3_t* sql)
{
#ifdef USE_TRANSACTIONS
sqlite3_stmt* stmt = dc_sqlite3_prepare(sql, "ROLLBACK;");
if (sqlite3_step(stmt) != SQLITE_DONE) {
dc_sqlite3_log_error(sql, "Cannot rollback transaction.");
}
sqlite3_finalize(stmt);
#endif
}
void dc_sqlite3_commit(dc_sqlite3_t* sql)
{
#ifdef USE_TRANSACTIONS
sqlite3_stmt* stmt = dc_sqlite3_prepare(sql, "COMMIT;");
if (sqlite3_step(stmt) != SQLITE_DONE) {
dc_sqlite3_log_error(sql, "Cannot commit transaction.");
}
sqlite3_finalize(stmt);
#endif
}