Sponsored Content
Full Discussion: void pointer
Top Forums Programming void pointer Post 302655633 by vlm on Wednesday 13th of June 2012 12:15:43 PM
Old 06-13-2012
Quote:
Originally Posted by Corona688
The size of void may be undefined(not always -- sometimes it's '1' for the sake of easy pointer math), but the size of void * is definitely defined -- it's the same size as any other pointer.

I don't see any reason you couldn't have an array of void * pointers, and don't see anything wrong with the code you posted..
The thing is that when I try to refer to one element of the array,that means to one void* it doesn't work.
For example when I had:

Code:
main(){
    void* a;
    fun(&a); //call a function named fun
}

void fun(void** b){
//do things
}

it worked fine.But when I did this for many void* in a loop

Code:
main(){
   void** a;
   a=(void**)malloc(n*sizeof(void*));
   for(int i=0;i<n;i++)
      fun(a[i]);//call the same function as above
}

void fun(void **b){
  //do things
}

it returns segmentation fault.
 

9 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Sorting the Void File in CSH

First and foremost, this is not a homework for your information. I'm just new to using c-shell programming and I just wanted to make my life easier @ work. Say, the file contains the following: ID FILE NO. SL VP 1 1 22 33 1 2 ... (3 Replies)
Discussion started by: ilak1008
3 Replies

2. Programming

How to return void function pointer

Hello all im trying to build function that will return void function pointer what is mean is ( not working ) the main function void * myClass::getFunction(int type){ if(type==1) return &myClass::Test1; if(type==2) return &myClass::Test2; } void myClass::Test1(){... (1 Reply)
Discussion started by: umen
1 Replies

3. Programming

What is the difference between f(...), f(void) and f()

What is the difference between f(...) , f(void),f() I know that f(void) doesn't take any parameters, but what about f() and f(...) Does the last call of function even exists? (2 Replies)
Discussion started by: purplelightspar
2 Replies

4. UNIX for Dummies Questions & Answers

void (char *asd)

void asdf(char *asd) is this thing a pointer? (1 Reply)
Discussion started by: khestoi
1 Replies

5. Programming

pass a pointer-to-pointer, or return a pointer?

If one wants to get a start address of a array or a string or a block of memory via a function, there are at least two methods to achieve it: (1) one is to pass a pointer-to-pointer parameter, like: int my_malloc(int size, char **pmem) { *pmem=(char *)malloc(size); if(*pmem==NULL)... (11 Replies)
Discussion started by: aaronwong
11 Replies

6. Programming

functions that manipulate void pointers

I have two or more linked lists that have the same names for their "next". For example, struct server_t { sockaddr_in * sin; server_t * next_; } struct player_t { char name; player_t * next_; } How can I get a function to take in either type and manipulate the pointers? I... (3 Replies)
Discussion started by: pyramation
3 Replies

7. Shell Programming and Scripting

Eliminate double void line

Hi, I need to eliminate each second void line in a text file. novus MILLENNIO ineo frater in episcopatus , presbyter et diacon|diaconus , (1 Reply)
Discussion started by: mjomba
1 Replies

8. HP-UX

converting void pointer to pthread_t on HPUX Itanium

i am trying to convert void pointer to pthread_t on hpux-itanium 64 bit which fails as below "src/file.cpp", line 88: error #2171: invalid type conversion pthread_t tid = reinterpret_cast<pthread_t>(m_threadId); 1 error detected in the compilation of "src/file.cpp" ... (0 Replies)
Discussion started by: skyineyes
0 Replies

9. Programming

Malloc to void pointer fails

I have a function to which I will pass a struct ID and it will return me a string. I will pass a pointer to store the name string and that pointer will be allocated memory by the function called. int ConvertIDToName(void *id, void *name, size_t *size) { int status = 0; ... (5 Replies)
Discussion started by: rupeshkp728
5 Replies
PAPS(1) 						      General Commands Manual							   PAPS(1)

NAME
paps - UTF-8 to PostScript converter using Pango SYNOPSIS
paps [options] files... DESCRIPTION
paps reads a UTF-8 encoded file and generates a PostScript language rendering of the file. The rendering is done by creating outline curves through the pango ft2 backend. OPTIONS
These programs follow the usual GNU command line syntax, with long options starting with two dashes (`-'). A summary of options is included below. --landscape Landscape output. Default is portrait. --columns=cl Number of columns output. Default is 1. --font=desc Set the font description. Default is Monospace 12. --rtl Do rtl layout. --paper ps Choose paper size. Known paper sizes are legal, letter, a4. Default is A4. --bottom-margin=bm Set bottom margin in postscript points (1/72 inch). Default is 36. --top-margin=tm Set top margin. Default is 36. --left-margin=lm Set left margin. Default is 36. --right-margin=rm Set right margin. Default is 36. --help Show summary of options. --header Draw page header for each page. --markup Interpret the text as pango markup. --encoding=ENCODING Assume the documentation encoding is ENCODING. --lpi Set the lines per inch. This determines the line spacing. --cpi Set the characters per inch. This is an alternative method of specifying the font size. --stretch-chars Indicates that characters should be stretched in the y-direction to fill up their vertical space. This is similar to the texttops behaviour. AUTHOR
paps was written by Dov Grobgeld <dov.grobgeld@gmail.com>. This manual page was written by Lior Kaplan <kaplan@debian.org>, for the Debian project (but may be used by others). April 17, 2006 PAPS(1)
All times are GMT -4. The time now is 07:40 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy