Thread: Can't allocate enough memory for image data

  1. #1
    Registered User
    Join Date
    Jul 2006

    Question Can't allocate enough memory for image data

    I'm receiving this error in my output file:

    Can't allocate -1124073472 bytes for image data

    How do I change this code to rectify the problem?

    unsigned char *thebuffer = 0;
    thebuffer = malloc(2000000000);

    To effectively answer my question...If any other information/code is needed, then let me know. Thanks

  2. #2
    C++ Developer XSquared's Avatar
    Join Date
    Jun 2002
    Ontario, Canada
    You do realize that you're attempting to allocate about 1.8GB of memory, correct? That seems like a bit much, and is probably where your problem is coming from.
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  3. #3
    Code Goddess Prelude's Avatar
    Join Date
    Sep 2001
    >thebuffer = malloc(2000000000);
    You realize that you're trying to allocate just under two gigabytes of data, right? If you honestly need that much data in memory at one time for a simple image, you really need to rethink your design.
    My best code is written with the delete key.

  4. #4
    Registered User
    Join Date
    Mar 2006
    Get a bigger RAM chip.
    #include <stdio.h>
    void J(char*a){int f,i=0,c='1';for(;a[i]!='0';++i)if(i==81){
    /3*3+f/3*9+f%3]==c||a[i%9+f*9]==c||a[i-i%9+f]==c)goto e;a[i]=c;J(a);a[i]
    ='0';e:;}}int main(int c,char**v){int t=0;if(c>1){for(;v[1][
    t];++t);if(t==81){J(v[1]);return 0;}}puts("sudoku [0-9]{81}");return 1;}

  5. #5
    Frequently Quite Prolix dwks's Avatar
    Join Date
    Apr 2005
    Load a smaller image. Displaying a 2GB image would take a while anyway.

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  6. #6
    Registered User
    Join Date
    Jan 2006
    Berkeley, Ca
    On some unnamed operating systems, it's not possible to malloc() more than 2GB of memory. It has something to do with how the userland and kernelland space is divided up in virtual memory. I think there ways to get around this limit.

    If I remember right, the owner of the DNA Lounge had written a program that inserted the date and time into the .jpeg files generated by the clubs web cam. I'm pretty sure it could handle really large honkin files. I say pretty sure because I didn't and still don't have the patience to sit down and read his source code.

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