������������ • ��������� > < WWW.GOODRAIN.COM 23 java,php,python,ruby,node.js,golang � dockerfile mysql,pgsql,mongodb,redis,memcache � docker 服务语言 数据存储 ������ � kubernetes 服务编排 �� �� ��� �� �� �� 服务管理 �������

ab l e b y t h e W e b s e r v e r p r oc e s s , as r e q u i r e d b y S Q Li t e . 1 . 5 . 2 I m pl e m e nt i ng C R U D O pe r a t i o ns Now i s t h e f u n p ar t . W e w ou l d l i k e t o i m e : sqlite:/path/to/dbfile • M y S Q L: mysql:host=localhost;dbname=testdb • P os t gr e S Q L: pgsql:host=localhost;port=5432;dbname=testdb • S Q L S e r v e r : mssql:host=localhost;dbname=testdb ID is invalid throw new CHttpException(404,’The specified post cannot be found.’); 7 . 5 . 2 D i s pl a y i ng E r r o r s W h e n an e r r or i s f or w ar d e d t o t h e C E r r or Han d l e r ap p

php file has a name. By default, there are three connections defined: sqlite, mysql, sqlsrv, and pgsql. You are free to change these connection names. The default connection can be specified via the default

ab l e b y t h e W e b s e r v e r p r oc e s s , as r e q u i r e d b y S Q Li t e . 1 . 6 . 2 I m pl e m e nt i ng C R U D O pe r a t i o ns Now i s t h e f u n p ar t . W e w ou l d l i k e t o i m e : sqlite:/path/to/dbfile • M y S Q L: mysql:host=localhost;dbname=testdb • P os t gr e S Q L: pgsql:host=localhost;port=5432;dbname=testdb • S Q L S e r v e r : mssql:host=localhost;dbname=testdb ID is invalid throw new CHttpException(404,’The specified post cannot be found.’); 8 . 5 . 2 D i s pl a y i ng E r r o r s W h e n an e r r or i s f or w ar d e d t o t h e C E r r or Han d l e r ap p

com/jbarham/gopgsqldriver supports database/sql , written in pure Go. https://github.com/lxn/go-pgsql supports database/sql , written in pure Go. I will use the first one in the examples that follow

'virt' має PL011 UART, тож давайте напишемо для нього драйвер. const FLAG_REGISTER_OFFSET: usize = 0x18; const FR_BUSY: u8 = 1 << 3; const FR_TXFF: u8 = 1 << 5; /// Мінімальний драйвер для PL011 UART. драйвера UART для пристрою PL011 /// за заданою базовою адресою. /// /// # Безпека /// /// Задана базова адреса повинна вказувати на 8 керуючих регістрів MMIO пристрою /// PL011, які повинні бути відображені & FR_TXFF != 0 {} // БЕЗПЕКА: ми знаємо, що базова адреса вказує на регістри // керування пристрою PL011, які відповідним чином відображені. unsafe { // Записуємо в буфер TX. self.base_address.write_volatile(byte);

� � � � � . 53.4 � � � � � � � � � � � � � � UART � � � � � � � � � � � � � � � QEMU 'virt ' � � PL011 � � � � � � � UART � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � . const << 5 ; / / / Minimal driver for a PL011 UART . pub struct Uart } base_address: *mut u8 , { impl Uart } / / / Constructs a new instance of the UART driver for a PL011 device at the / / / given base Safety / / / / / / The given base address must point to the 8 MMIO control registers of a / / / PL011 device, which must be mapped into the address space of the process / / / as device memory and not

machine has a PL011 UART, so let's write a driver for that. const FLAG_REGISTER_OFFSET: usize = 0x18; const FR_BUSY: u8 = 1 << 3; const FR_TXFF: u8 = 1 << 5; /// Minimal driver for a PL011 UART. 287 instance of the UART driver for a PL011 device at the /// given base address. /// /// # Safety /// /// The given base address must point to the 8 MMIO control registers of a /// PL011 device, which must be mapped & FR_TXFF != 0 {} // SAFETY: We know that the base address points to the control // registers of a PL011 device which is appropriately mapped. unsafe { // Write to the TX buffer. self.base_address.write_volatile(byte);

machine has a PL011 UART, so let's write a driver for that. const FLAG_REGISTER_OFFSET: usize = 0x18; const FR_BUSY: u8 = 1 << 3; const FR_TXFF: u8 = 1 << 5; /// Minimal driver for a PL011 UART. pub struct instance of the UART driver for a PL011 device at the /// given base address. /// /// # Safety /// /// The given base address must point to the 8 MMIO control registers of a /// PL011 device, which must be mapped & FR_TXFF != 0 {} // SAFETY: We know that the base address points to the control // registers of a PL011 device which is appropriately mapped. unsafe { // Write to the TX buffer. self.base_address.write_volatile(byte);

编写 UART 驱动程序 QEMU“虚拟机”具有 PL011 UART，现在为其编写驱动程序。 const FLAG_REGISTER_OFFSET: usize = 0x18; const FR_BUSY: u8 = 1 << 3; const FR_TXFF: u8 = 1 << 5; /// Minimal driver for a PL011 UART. pub struct Uart instance of the UART driver for a PL011 device at the /// given base address. /// /// # Safety /// /// The given base address must point to the 8 MMIO control registers of a /// PL011 device, which must be mapped & FR_TXFF != 0 {} // SAFETY: We know that the base address points to the control // registers of a PL011 device which is appropriately mapped. unsafe { // Write to the TX buffer. self.base_address.write_volatile(byte);