signal function

Linux Process CommunicationI. Overview of inter-process communicationProcess Communication has the following purposes:A. Data Transmission: A process needs to send its data to another process. The data volume sent is between one byte and several

1. Signal ConceptA signal is a message (event) that is generated by itself or sent by the process outside the process during its operation. The signal is a hardware interrupt software simulation (soft interrupt). Each signal is represented by an

the nature of the signal is asynchronous. Asynchronous one word, listen to high-end atmosphere on the grade, and let people cloud mountain fog around, it is not. In fact, we think that our world is asynchronous, everyone does things, do not always a-

I. Inter-process communication overview process communication has the following purposes: A. data transmission: A process needs to send its data to another process, the sent data volume is between one byte and several MB. B. shared data: if multiple

A sentence has not been able to express the excitement of the present, only a sigh of knowledge and profound, and the sigh into the text.Calling other class member variables in the same project is straightforward.Such as:DefinedDeclare member

while (PID = Waitpid ( -1, &stat, Wnohang)) > 0)Need to write to the signal processing function, if there are 10 sub-processesAs long as the parent process is able to receive the last signal, the resulting zombie process from the previous loss can

[07] UNIX process environment========================================1. Process TerminationAtexit () function registration termination processProgram.Exit () or return statement:Terminate the Handler-> terminate the Handler-> standard I/O cleanup-> _

Introduction Middleware is used for inter-process communication to reduce coupling between different programs. The middleware principle is similar to that of distributed computing.Document It is very convenient to use python to operate idea.

1. In C, a function is a function-to-pointer method, that is, a function is automatically converted to a pointer type. Copy codeThe Code is as follows: # include Void fun (){} Int main (void){Printf ("% p \ n", & fun, fun, * fun );Return 0;} Bytes

Lien0000342014-10-291. Concept of Signal The description of signals in Wikipedia is as follows: In computer science, signals (English: Signals) are a restricted way of inter-process communication in UNIX, Unix-like, and other POSIX-compatible

1, the process of independence and collaborationWhen the process runs in the operating system, each process is highly independent and closed! But some program problems require multiple processes to collaborate. At this time there is a

The pause function of the pause function suspends the process that calls it until any message arrives . The calling process must be able to handle the signal being served, otherwise the default deployment of the signal will occur. int pause (void),

http://publib.boulder.ibm.com/infocenter/iseries/v5r3/index.jsp?topic=%2Fapis%2Fsigpend.htm Syntax #include int sigpending (sigset_t *set); Service program NAME:QPOSSRV1 Default Public Authority: *use Threadsafe:yes The sigpending ()

Qmetaobjectprivate provides the management of an array of uint types in a Qmetaobject class member, which is a complex structure, so qmetaobjectprivate provides the definition and operation functions of the structure to facilitate its

First, the basic concept1. InterruptionAborts, pauses the currently executing process, and performs other tasks instead.Hard interrupts: interrupts from hardware devicesSoft interrupts: interrupts from other programs2. SignalA signal is a soft

signal and its processing signal processing is an event that UNIX and Linux systems generate in response to certain conditions, usually the kernel generates a signal, and the process receives a signal and takes action accordingly .For example,

Why interprocess communication (IPC (inter-process communication))Data transfer: One process needs to send its data to another process, sending the amount of data between a byte and a few m bytesShared data: Multiple processes want to manipulate

[Go] acknowledgements http://www.cnblogs.com/xiazh/archive/2012/11/08/2757882.htmlWhy interprocess communication (IPC (inter-process communication))Data Transfer : One process needs to send its data to another process, sending the amount of data

Okay, today is the second chapter of our Linux Server model-tcp pre-derived subprocess service, accept no lockout protection.The literal understanding is that a certain number of sub-processes are derived at the start-up stage, and these

Transfer from http://blog.sina.com.cn/s/blog_587c016a0100nfeq.htmlIntroduction to several main methods of interprocess communication IPC under Linux:Pipe and well-known pipe (named pipe): Pipelines can be used for communication between affinity