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Improve SQLite busy handling

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Eelco Dolstra 2017-02-28 13:59:11 +01:00
parent 34b12bad59
commit fd86dd93dd
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3 changed files with 43 additions and 31 deletions
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6
src/libstore/sqlite.hh
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@ -30,8 +30,9 @@ struct SQLiteStmt
{
sqlite3 * db = 0;
sqlite3_stmt * stmt = 0;
std::string sql;
SQLiteStmt() { }
SQLiteStmt(sqlite3 * db, const std::string & s) { create(db, s); }
SQLiteStmt(sqlite3 * db, const std::string & sql) { create(db, sql); }
void create(sqlite3 * db, const std::string & s);
~SQLiteStmt();
operator sqlite3_stmt * () { return stmt; }
@ -94,6 +95,8 @@ MakeError(SQLiteBusy, SQLiteError);
[[noreturn]] void throwSQLiteError(sqlite3 * db, const format & f);
void handleSQLiteBusy(const SQLiteBusy & e);
/* Convenience function for retrying a SQLite transaction when the
database is busy. */
template<typename T>
@ -103,6 +106,7 @@ T retrySQLite(std::function<T()> fun)
try {
return fun();
} catch (SQLiteBusy & e) {
handleSQLiteBusy(e);
}
}
}