sendable

difference between an interface and an abstract class in Java is that an interface is an abstraction of the behavior, whereas an abstract class is an abstraction of a class, and in a scenario with the same behavior, we prioritize defining an interface to constrain The equivalent of assigning them a principle that must implement the behavior (function) defined in the interface. Therefore, it is necessary to design a common interface sendable, in whic

discarded. 21. ctsholding gets the status of the "sendable" Row You can send (CTS) rows in the hardware handshake of sending/sending requests (RTS/CTS. The port queries the CTS row before sending data. 22. dsrholding obtains the status of the data set-up (DSR) Signal Use this attribute in Data ready/Data Terminal ready (DSR/DTR) handshake. Generally, the modem sends the data-ready (DSR) signal to the port to indicate that it is ready for data

immediately */If (icsk-> icsk_ca_state! = TCP_CA_Open)Goto send_now;/* Defer for less than two clock ticks.* If the last skb is delayed for more than 1 ms, the delay is no longer required.* That is to say, the TSO latency cannot exceed 2 ms!*/If (tp-> tso_deferred (u32) jiffies Goto send_now;In_flight = tcp_packets_in_flight (tp );/* If this data segment does not need to be split or cannot be sent due to congestion windows, an error is returned */BUG_ON (tcp_skb_pcount (skb) /* Remaining size

Writeline Writes the specified string and newline value to the output buffer. DiscardinbufferDiscardoutbuffer Clear Received Buffer dataClear output buffer to data Attribute description Name Description Basestream Obtain the basic Stream Object of the SerialPort object Baudrate Get or set the serial baud rate Breakstate Obtains or sets the interrupt signal status. Bytestoread Obtain the number of by

action is to terminate the process.# Define sigurg 16/* urgent condition on Io channel */When a process is opened on a socket, The sigurg is sent to the process. If the process does not capture this signal, it will be discarded. The default action is to discard this signal.# Define sigstop 17/* sendable stop signal not from tty */This signal cannot be captured or ignored. Once the process receives the sigstop signal, it immediately stops until it rec

the selected port number, and click the "receive" button, the transmitted data is received in the "receive data" text box; The SerialPort class is provided in. NET Framework 2.0, which implements serial data communication. The following describes the main attributes (table 1) and methods (table 2) of this class ). Table 1 Common attributes of the SerialPort class Description BaseStream: obtains the basic Stream Object of the SerialPort object.BaudRate gets or sets the serial baud rateBreakStat

is to terminate the process.#define Sigurg */Urgent condition on IO channel */When certain conditions occur on a socket that the process has opened, Sigurg is sent to the process. If the process does not capture this signal, it will be discarded. The default behavior is to discard this signal.#define SIGSTOP ~/* sendable stop signal not from TTY */This signal cannot be captured or ignored. Once the process receives the sigstop signal, it stops (stop)

) to the process. These timers will be mentioned later in this chapterThe Setitimer and alarm invocation settings. The default behavior is to terminate the process. #define SIGTERM/* software termination signal from KILL * * The sigterm signal is sent to the process, notifying the process that it is time to terminate and do some cleanup activity before terminating. The sigterm signal is the default signal sent by the KILL command for UNIX, as well as the default signal sent to the process when