I am trying the wrap feature for the first time. I followed the instruction as mentioned in this link URl...but I am getting an error saying "undefine reference to __wrap_malloc.I followed all the steps, but the post was a decade old, I am sure something has changed? or am I missing something.
View 2 RepliesCode:
#include <iostream>
using namespace std;
[code]...
I am doing some Linux kernel programming for my research project. I need to record the timestamp (by using cpuid and rdtsc) when an interrupt handler (top half) is first invoked. Due to the time critical nature of the problem itself, I have to do the timestamping inside the interrupt handler itself (the first operation when the handler is called). However, I understand that tasks that are not so time critical should be deferred to a tasklet function (bottom half) for processing because other interrupts are disabled in a (top-half) interrupt handler. I am currently out of idea on how I can pass the timestamp information that I have obtained in the interrupt handler to the corresponding tasklet function.
View 2 Replies View RelatedI want to declare a function in a function, but had no success till now, see the error code below and visit the project at sourceforge
[Code]...
I looked on the net for such function or example and didin't find anything, thus after having made one i guess it would be legitimate to drop it to see what others thinks of it.
#!/bin/bash
addelementtoarray()
{
local arrayname=$1
[code]....
fit a surface i.e. W(x,y) using svdfit() provided by "Numerical Recipes in C". svdfit() is written for curve fitting and not for surface fitting.But one can use svdfit(), as claimed by authors of NR book, to do surface fitting. On page 680 of NR book, authors have given a hint on how to use svdfit() for fitting a surface. But I have not understood it.This link may be helpful (Chapter 15 th is relevant here.):[URL]This is my problem:
Code:
I have a set of 100 numbers. I want to fit a 2-Dimensional function W(x,y) to these numbers.
[code]....
I am a composer with no money whose old music computer and keyboard were destroyed in an accident. I can't afford to replace them. However, I still have 320+ gb of soundfonts that I would like to play on my 64-bit Ubuntu 10.04 machine. No composing now; I just want to play them on my computer keyboard. The trouble is, I can't find any native Linux app that works.
I used wine install the demo version of FL Studio 9, and I can play my soundfonts with it, but the latency is terrible. I have to set the latency to 65 milliseconds before I get anything but a stuttering mess.
I'd really like to use Virtual MIDI Piano Keyboard, but the sound doesn't work, and I'm not sure how to troubleshoot it. The System Testing detects my sound device as "DA-Intel - HDA NVidia HDA NVidia at 0xfe024000 irq 21"
since when does NVidia manufacture sound equipment? Is this a motherboard with integrated sound?
How would someone with very little programming experience go about creating a custom virtual musical instrument? Each key would produce a tone of a specified frequency when clicked. Instead of being limited to a piano keyboard layout, each key would be movable. Holding the Shift key would allow multiple keys to sound at once. (See attachment for what it might look like.)I know there are dozens of possibilities (Flash, Java, etc.) Which would be best?
View 1 Replies View RelatedI'm trying to get audio from a keyboard into my computer. I have a 1/8' to 1/4' adapter, and I can hear the sound from the other end when I connect my earphones to the keyboard, but if I connect it to my computer's microphone port, it doesn't even recognize something connected there. Sound preferences tell me that there are two microphones connected (two built-in microphones), and so does Jack.How do I get it to detect the keyboard? I'm using Ubuntu 9.10 64-bit, if that's of any relevance.
[edit] I also tried connecting this computer to another computer (i.e. Speakers are connected to computer 2, a 1/8' cable goes from the speaker's earphone socket and into computer 1's microphone in). I expected the sound produced by computer 2 to go to computer 1 like regular microphone input would, but it still didn't detect anything and persisted in telling me that there are only two sound inputs on the computer.
I'm trying to get audio from a keyboard into my computer. I have a 1/8' to 1/4' adapter, and I can hear the sound from the other end when I connect my earphones to the keyboard, but if I connect it to my computer's microphone port, it doesn't even recognize something connected there. Sound preferences tell me that there are two microphones connected (two built-in microphones), and so does Jack. How do I get it to detect the keyboard? I'm using Ubuntu 9.10 64-bit.
[edit] I also tried connecting this computer to another computer (i.e. Speakers are connected to computer 2, a 1/8' cable goes from the speaker's earphone socket and into computer 1's microphone in). I expected the sound produced by computer 2 to go to computer 1 like regular microphone input would, but it still didn't detect anything and persisted in telling me that there are only two sound inputs on the computer.
I'm trying to get audio from a keyboard into my computer. I have a 1/8' to 1/4' adapter, and I can hear the sound from the other end when I connect my earphones to the keyboard, but if I connect it to my computer's microphone port, it doesn't even recognize something connected there. Sound preferences tell me that there are two microphones connected (two built-in microphones), and so does Jack.
How do I get it to detect the keyboard? I'm using Ubuntu 9.10 64-bit, if that's of any relevance.
[edit] I also tried connecting this computer to another computer (i.e. Speakers are connected to computer 2, a 1/8' cable goes from the speaker's earphone socket and into computer 1's microphone in). I expected the sound produced by computer 2 to go to computer 1 like regular microphone input would, but it still didn't detect anything and persisted in telling me that there are only two sound inputs on the computer.
I am looking for a program to extract a single instrument (guitar) for the purpose of learning to play it.
I don't care if it costs $ or not as long as it is native to UBUNTU 9.10 .
I have a question about calling an asm function from C....It doesn't work unless I create an asm variable to hold the value of the function in....Why?Here's the code that doesn't work...
asmfile.s - version one Code: .section .data
mydata: .ascii "this is the message!
.equ mylen, . - mydata
[code]...
I want to use backtrace() function to debug a crash issue. I tried this sample code to see how backtrace works. backtrace() function always returns 0 with the below code. Is there any kernel configuration that needs to be set for proper working of backtrace?
#include <execinfo.h>
#include <stdio.h>
#include <stdlib.h>
/* Obtain a backtrace and print it to stdout. */
void
print_trace (void)
[Code]...
Can you offer me the code about fmod() in C. I want to know how this function work, i am very interested in it because i have no idea to implement it, i want to know... how to write the function... not 'how to use the function' can anyone post the source codes of this function here?
View 6 Replies View Relatedi have an open source application that was developed in C++ (it uses objects and namespaces all over the place). I also have another application that was developed in C. Now i am trying to insert the code made in C into C++ application, but when i do that , i get this error on compilation of the source code:
Code:
error: 'mpi_init_vars' was not declared in this scope the function mpi_init_vars() is not part of object oriented programming and it doesn't belong to any scope, it was compiled into an object file and i am linking it with all objects of C++ application.
How can invoke the C function from C++ object oriented code?
I am trying to build a function inside a script.
Code:
#!/bin/sh
#System commands and other configurable.
IPT=/sbin/iptables
IP6T=/sbin/ip6tables
IPST=/usr/sbin/ipset
MODP=/sbin/modprobe
GET=/usr/bin/wget
INT_NET=192.168.1.0/24 .....
I can find lots of tutorials in how to use if, then, else. However, how do I define a variable inside the function?
SEE>>
Code:
for c in $ISO
Also, am I using the 'test' command correctly( -/+ week as valid test)?
I am doing a web site program and what I need is to call a C program in the PHP cloud.Do u think it would be possible? The web site would get the user input from PHP UI and pass to the C program , the C program would process the function with the user input and output the a PHP page.
View 2 Replies View RelatedI ask if a c++/c function is able to know its name from inside itself:
example:
Code:
int funct1(int a,b)
{
printf("%s ",funct_name());
}
or with a trick.
Code:
#!/bin/ksh
(...)
# FILL UP PARTITION
diskfillerfunction () {
[Code]....
Test 15: fill up partition /usr/bin/time: cannot run diskfillerfunction: No such file or directory
I am obviously omitting (...) a lot of the code, but the relevant part is all there. How do I 'time' a function?
I wrote a spinner in Perl and when I did a spinner in shell I could just run the subroutine in the background.
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In Perl, how do you run a function in a background and get the PID for that? I know PID in Perl is $$
I know what is the functionality of the sleep() method.
for(i = 0; i < length; i++){
sleep(1000);
printf("%c
", message[i]);
}
Result :every print of the message will be takes 1000sec of gap but i want to know why wee need to use the Sleep function. where exactly it is useful
On this link [URL]4 a return type is defined
Code:
return ((unsigned int)(unsigned long)base & TBASE_DEFERRABLE_FLAG);
What is the above function returning.I am not clear with definition of what is being returned in the above code.
i want to compile function c in java and compile library is success.. when i call the library in java and error is :
Exception in thread "main" java.lang.UnsatisfiedLinkError: no libfunc.so in java.library.path
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1689)
at java.lang.Runtime.loadLibrary0(Runtime.java:823)
at java.lang.System.loadLibrary(System.java:1028)
[Code]....
I'm an italian student that's making a project for an exam of the university.I'm trying to install a usb driver to talk with an instrument that my profalso the drivers were given by my prof. the driver now I'm trying to install is called:libhid-0.2.12.origI've opened it and I have run the programm called configure.I had the same problem of Gabyx (in a topic in the section linux Programming & Scripting) but I think I've resolved it in the same way suggested by Lakerdonald....now after I run configure appears:
Code: configure: Using db2man stylesheet: /usr/share/kde4/apps/ksgmltools2/docbook/xsl/html/docbook.xsl
configure: creating ./config.status
[code]....
In shell, I execute "./ffmpeg -f h264 - | xxx"
Now I hope use execl function to execute above operations,
I call execl("/bin/sh", "sh", "-c", "./ffmpeg -f h264 - | xxx");
but ffmpeg doesn't work, it seems that "|" pipe don't work.
how could I solve this?
I wrote some code in c, using pthread (I configured the linker and compiler in eclipse IDE first).
Code: #include <pthread.h>
#include "starter.h"
#include "UI.h"
Page* MM;
[Code]....
I tried to make a (very simple) function to put in my .bashrc file to make a local backup of a file, but when I call the function and try to use tab completion I get the following error: Code: cp: cannot stat `help': No such file or directory The function I added is as follows:
Code: function bk
{
cp -f --backup=numbered ${1} ${1}.bak
[code]....
I've an ELF file (exec)...I'm interested in getting a the function prototype of the "myfunc"...
View 9 Replies View RelatedThis is my file, named xxx.c. And there are two functions in it.
[code]...
When I try to compile the whole project, I used -ffunction-sections,-fdata-sections to generate the .o files, use Wl,--gc-sections -Wl,--print-gc-sections to link to the exacutable file. gcc 4.3.2 ld 2.18 Debian 5 After the first time I compiled it, I got a list of Removed functions. But one second later, I rememberd that I forget to close the Compile Switch: Debug. Then I had to recompile it and got another list. Compare these two lists, I found that , bxx isn't on the second list. First I guess that bxx is a debug function but never used in debug mode, and it won't be compiled in release mode. I check the source and find that there was no compile switch for bxx. But it's caller function axx, is removed, both the debug switch is on and off. I try to compiled the project for several times , but the result is the same. I can't realized it , why? Is that the --gc-sections won't remove all the functions not used?