Question

我一直在使用libmysqlclient。以下是我的声明：

MYSQL *sql;
MYSQL *sqlPut;
MYSQL_RES *qResult;


@property(assign) MYSQL *sql;
@property(assign) MYSQL *sqlPut;
@property(assign) MYSQL_RES *qResult;

这是我分配属性的代码：

        MYSQL *newSql = mysql_init(NULL);
        if (newSql == NULL) NSLog(@"MYSQL: Failed to initate connection");
        my_bool reconnect = 1;
        mysql_options(newSql, MYSQL_OPT_RECONNECT, &reconnect);
        NSInteger connectionTimeout = 300; 
        mysql_options(newSql, MYSQL_OPT_CONNECT_TIMEOUT, (const void *)&connectionTimeout);
        mysql_options(newSql, MYSQL_OPT_WRITE_TIMEOUT, (const void *)&connectionTimeout);
        mysql_options(newSql, MYSQL_OPT_READ_TIMEOUT, (const void *)&connectionTimeout);

        //mysql_options(newSql, CLIENT_INTERACTIVE, &reconnect);

        NSNumberFormatter *portTransfer = [[NSNumberFormatter alloc] init];

        newSql = mysql_real_connect(newSql, [[connection valueForKey:@"ip"] UTF8String] , [[connection valueForKey:@"login"] UTF8String], [[connection valueForKey:@"password"] UTF8String], [[connection valueForKey:@"database"] UTF8String], [[portTransfer numberFromString:[connection valueForKey:@"port"]] unsignedIntValue], NULL, 0);
        if (newSql == NULL) { NSLog(@"MYSQL: Failed to connect database with error:%s\n for connection:%@",mysql_error(newSql),connection); return NO ;}
        //else NSLog(@"MYSQL: Carrier:%@ connect database DONE",carrierName); 
        if ([[connection valueForKey:@"selectionDirections"] intValue] == 0) if (!self.sql) self.sql = newSql; else mysql_ping(self.sql);
        else {
            //NSInteger connectionTimeout = 10; 
            //mysql_options(newSql, MYSQL_OPT_CONNECT_TIMEOUT, (const void *)&connectionTimeout);
            //self.sqlPut = newSql; 
            if (!self.sqlPut) self.sqlPut = newSql; else mysql_ping(self.sqlPut);
        }
        [portTransfer release];

清理此属性的正确方法是什么？我有一个泄漏，我在我的代码中找不到，所以我认为它可能会泄露在这部分代码中。目前我这样做：

self.sql = nil;
self.sqlPut = nil;
self.qResult = nil;

Answer 1

mysql_init分配关闭连接时释放的新对象。如果代码流没有到达关闭连接的位置，则必须清理内存。

所以我会说使用连接句柄后调用mysql_close。

赋值属性的内存管理规则

1 个答案: