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This is a creation in Article, where the information may have evolved or changed. Capturing and processing signals can be achieved with elegant start and restart. The signal of Golang provides the relevant methods. Here is a template, directory structure: ├──sig│└──sig.go└──test.go First look at how to invoke: 1.new out an Object 2.register signal and correspon
Common processing signals under Unix Copy Code code as follows: No Name Default Action Description 1 sighup Terminate process terminal line Hangup 2 SIGINT Terminate process interrupt Program 3 Sigquit Create core Image quit program 4 Sigill Create core image illegal instruction 5 Sigtrap Create core image trace trap 6 SIGABRT Create Core Image Abort Program (formerly Sigiot) 7 SIGEMT Create core image emulate instruction executed
resonant positions are called resonance peaks, which generate voice signals. Has a huge impact. 4. Masking EffectStarting from the perception characteristics of human ears, it is a psychological acoustic phenomenon and will be detailed later. Relationship between voice signals and audio signalsThe frequency range of the voice signal is 200 ~ Around Hz, people can hear the audio signal range is 20 ~ 20 KHz,
IntroductionLet's look at the following two semaphores: Sigpipe when the pipe reads off and then writes to the pipe, the sigpipe signal is emitted.SIGCHLD Child process exit will send a SIGCHLD signal to the parent process, the system default processing is to ignore the signalCode/************************************************************************* > File na
signal, and the sub-process (thread) performs default processing, that is, exit. When a child process exits, it sends a sigchld signal to the parent process (thread), indicating that the child process exits. Because the signal is not blocked, the main process (thread) exits immediately, the preceding running condition
reentrant function ConceptQ To enhance the stability of the program, the Reentrant function should be used in the signal processing function.Q The so-called reentrant function refers to a process that can be called by multiple tasks, and the task does not have to worry about whether the data will go wrong when it is called. Since the process receives the signal,
I have always been interested in speech signal processing technology, but I have also been confused about its future development and application, the main branch of speech signal processing technology is summarized and summarized to discuss with everyone the development direction and new applications of speech
Socket programming problems Sigpipe signal problem ============================ When the server closes a connection, if the client sends data. According to the TCP protocol, an rst response is received. When the client sends data to the server, the system sends a sigpipe signal to the process, telling the process that the connection has been disconnected, do not write any more.According to the default
Kill, killall, and linux Signal Processing-Linux general technology-Linux programming and kernel information. The following is a detailed description. In Linux, kill and killall commands are generally provided. The former can kill a thread Based on the pid, and the latter usually kill a group of threads Based on the name. For most people, the two are just different. If we plan to use the
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, when we want to force the end of a program, we usually send it a
non-cyclic deterministic signals, are often described by energy spectrum. However, for random signals, due to the infinite duration, they do not meet the conditions of absolute product and energy product. Therefore, there is no Fourier transformation, so the power spectrum is usually used to describe them. Periodic Signals also do not meet the conditions of Fourier transformation and are often described by power spectrum. In practice, frequencySpectrum--Direct
When programming with Linux C, processing signals is unavoidable. In multithreaded programming you need to pay attention to the use of two functions, one is pthread_sigmask (), used to block a signal in the thread, and the other is sigaction (), used in the thread to set the signal processing mode.void sig_handler1 (in
impossible in the time domain are quite easy in the frequency domain. This is where the Fourier transform is needed. In particular, the removal of some specific frequency components from a curve, which is called filtering in engineering, is one of the most important concepts in signal processing and can only be done easily in the frequency domain.Another more important, but slightly more complex, use-solvi
as the data_array_section, storing the result For i=1:moving_point_right Data_array_filter (i) =data_array_section (i);EndFor i= (col_array+moving_point_left+1): Col_array % This piece of code is to assign values to the first 4 and the last 4 points of a matrixData_array_filter (i) =data_array_section (i);EndFor i= (moving_point_right+1):(col_array+moving_point_left)For J=moving_point_left:moving_point_right Data_array_filter (i) =data_array_filter (i) +data_array_256 (i+j); %moving Averag
, the main process does not process the signal, and the sub-process (thread) performs default processing, that is, exit. When the child process exits, it will send a sigchld signal to the parent process (thread ).Indicates that the sub-process exits. Because the signal is not blocked, the main process (thread) also exi
Recently from Linux C to do Android, the boss suddenly looked at me idle, asked me to verify that "a process has many sub-threads, the child thread is registered to listen to a signal, the other process to send the signal to it, when it will be processed?" ”。With this problem, I searched the posts, and I probably came to the following:Process processing
impossible in the time domain are quite easy in the frequency domain. This is where the Fourier transform is needed. In particular, the removal of some specific frequency components from a curve, which is called filtering in engineering, is one of the most important concepts in signal processing and can only be done easily in the frequency domain.Another more important, but slightly more complex, use-solvi
Signal processing function Set one:#include typedef void (*sighandler_t) (int);sighandler_t signal (int signum, sighandler_t handler);Signal (SIGNUM,FUNC); return Sig_err On ErrorSend signal:The KILL function sends a signal to a process or process group, and the raise functi
Bash processing signalSend SignalKillFormat: kill[-s Sigspec |-n signum |-sigspec] [PID | jobspec] ...You can send a process with a process number of PID, or you can send a process with the job number JobspecSigspec can be either a signal number or a signal name, and the signal name can be no sigThe KILL command sends
Timer handling Signal Processing TIMERFD and SIGNALFD Timerfd Signalfd Timer handlingIn the libevent source Analysis-event processing process, the use of timers, to see the source code:NULL);//设置定时器事件Where Evtimer_set is a macro definition#define evtimer_set(ev, cb, arg) event_set((ev), -10, (cb), (arg))//event_set原型event *e
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