wdm multiplexing

:@ "timelinecell%d%d", indexpath.section , Indexpath.row]; 3. Delete all sub-views of the reused cell, resulting in a cell that has no special format for reuse by other cells. if (cell = = nil) {= [[UITableViewCell alloc] Initwithstyle:uitableviewcellstyledefault reuseidentifier : identifier]; } Else { // Delete all child views of cell while ([ Cell.contentView.subviews Lastobject] = nil) { [(UIView*) [cell.conte

　　　　　　　　　　　　Perform multi-user access with a for loopSEVERImport Socketsk1=socket.socket () Sk1.bind ((' 127.0.0.1 ', 888)) Sk1.listen () Import selectipt=[sk1,]while True: r_ List, w_list, e_list = Select.select (IPT, [], IPT, 1) print (' Listening SK object%s '% len (IPT)) print (r_list) for SK in R_list: If Sk==sk1: # indicates that a new customer has come con,addr=sk.accept () ipt.append (con) else: # old customers se

. How do I know if I have finished processing all the connections in the ready queue? Accept returns-1 and errno is set to Eagain to indicate that all connections are processed.In both cases, the server should use nonblocking accept, and the correct use of the accept in et mode is:while (Conn_sock = Accept (LISTENFD, (struct sockaddr *) remote, (size_t *) addrlen)) > 0) {handle_client (c Onn_sock);} if (Conn_sock = =-1) {if (errno! = Eagain errno! = econnaborted errno! = Eproto errno ! = eint

When I write this code, I find that many places are easily mistaken. Select may have an error, return-1.Like whatint fd_isset (int fd,fd_set *fdset), void fd_clr (int fd,fd_set *fdset), void fd_set (int fd,fd_set *fdset); void Fd_zero (int fd,fd_set *fdset);Several of the macros here are incoming pointers, not value passing.The SELECT function is declared as follows:int select (int maxfdp1,fd_set *readfds,fd_set *writefds,fd_set *exceptfds,struct timeval *timeout);Usage:1. First define good fd_

) One . O.C: $ (SRC) A$ (CC)-g-wall [email protected]-C $ - . Phony:clean - Clean : theRm-f $ (OBJ)Although know so much, but still feel that select does not have any effect.Select is used in conjunction with the socket, which is equivalent to the effect of the thread pool, but the thread pool has drawbacks, see here for details:http://blog.csdn.net/tianmohust/article/details/6677985http://blog.csdn.net/xifeijian/article/details/17385831Schematic diagram of the Select:First look at the one-to-on

In the project we often encounter Tableviewcell, but because the cell multiplexing, resulting in a cell sliding out of the interface and then return, the cell selection will disappear, the specific solution we can use Nsmutableset, Nsmutableset and Nsarray are similar, there are addobject:removeobject: two ways to add and remove data, So when we select the cell, we can add the indexpath of the cell or the tag value of the controls on the cell to the N

you, and the new file name needs to be determined.asmcmd> pwd+flash/devdb/controlfile/Asmcmd> lscurrent.303.956019293 > Not the same as you assigned.5. Modify the control file path in Sqlplus, and after the modification is complete, close the databaseSql> alter system set control_files= ' +data/devdb/controlfile/current.260.936769367 ', ' +flash/devdb/controlfile/ current.256.936769367 ', ' +flash/devdb/controlfile/current.303.956019293 ' scope=spfile sid= ' * ';sql> shutdown immediate;Ora-0150

Back to Catalogmultipleactiveresultsets can make the database connection reusable, but when you're on the Moebius cluster tool, this option doesn't turn on (false by default), and when you use an ORM tool like EF, This option will be added by default, it is to improve the performance of the program, the advantage is that the database connection resources are exhausted, the use of the method is simple, only need to add it to the data connection string.For example: server= (local); Integrated Secu

I/O multiplexing modelI/O multiplexing principle: Allows an application to monitor multiple I/O ports at the same time to determine if the operation on it can be performed and to achieve the purpose of reuse. Seeing an example in the book explaining the principle of I/O, I think it is very image that if a water pipe (I/O port) from 10 different places is monitored for flow (i.e., whether it is readable), th

Multi-channel multiplexing Function description We all know that the Fcntl () function solves the problem of file sharing, if you don't know, please see: http://blog.csdn.net/mybelief321/article/details/8993138. The next step is to handle I/O reuse. So, what is I/O multiplexing? Let's make it clear that the so-called I/O multiplexing is nothing more than multip

I/O multiplexing technology can be used in the following situations: 1. The client program handles multiple sockets simultaneously. (such as non-blocking Connect technology) 2. The client program handles both user input and network connections. The 3.TCP server handles both the listening socket and the connection socket simultaneously. (I/O multiplexing is the most used occasion) 4. The server handles both

About I/O multiplexing:I/O multiplexing (also known as "event-driven") is the first thing to understand. The operating system provides you with a feature. When one of your sockets is readable or writable. It can give you a notice. When used with a non-clogging socket, it is only when the system notifies me which descriptive descriptor is readable that I run the read operation. The ability to ensure that every read reads valid data without making a pur

of HTTP to the database level.1 Connection Multiplexing Technology Maintain each TCP connection we need to consume a certain amount of system resources, depending on the size of the memory, each server can support a very limited number of concurrent connections. Connectivity multiplexing is a very common optimization technique. Connection multiplexing is the cor

Trigger mechanism: 1) Horizontal trigger, 2) edge triggerIO multiplexing single-threaded implementation of the module: 1) Select (lowest efficiency), 2) poll;3) Epoll (best, nginx implementation). There are 3 types of modules under Linux, and only the Select module under WindowsBenefits of IO Multiplexing: Multiple connections can be monitored simultaneouslyIO multiplex