From: "A. Sinan Unur" Newsgroups: comp.os.msdos.djgpp Subject: Re: Problem with malloc/free Date: 2 Mar 2003 16:04:00 GMT Organization: Cornell University Lines: 32 Sender: asu1 AT cornell DOT invalid (on pool-141-149-206-96.syr.east.verizon.net) Message-ID: References: <3E6225AD DOT 1341CC2B AT ec-red DOT com> NNTP-Posting-Host: pool-141-149-206-96.syr.east.verizon.net X-Trace: news01.cit.cornell.edu 1046621040 27028 141.149.206.96 (2 Mar 2003 16:04:00 GMT) X-Complaints-To: usenet AT news01 DOT cit DOT cornell DOT edu NNTP-Posting-Date: 2 Mar 2003 16:04:00 GMT User-Agent: Xnews/5.04.25 To: djgpp AT delorie DOT com DJ-Gateway: from newsgroup comp.os.msdos.djgpp Reply-To: djgpp AT delorie DOT com Sergio Aguayo wrote in news:3E6225AD DOT 1341CC2B AT ec- red.com: > The problem is the following: i'm using DJGPP (the version available > right now), i'm using malloc with an array of pointers (20 char *) for > loading a file (a total of 20 files at once). The problem comes when i > call free to release that memory, there occures a SIGSEGV signal. I'm > also using allegro. without some code that we can compile and diagnose, there is not much we can do. however, you may have only allocated memory for the pointers, and nothing for those pointers to point to. int i; char **ptr_array = malloc(20 * sizeof(char *)); /* check if malloc returned NULL and handle the error */ for(i = 0; i != 20; ++i) { ptr_array[i] = malloc(some space); /* check if malloc returned NULL and handle the error */ } the codeabove was typed directly into the newsreader, and not tested. -- A. Sinan Unur asu1 AT c-o-r-n-e-l-l DOT edu Remove dashes for address Spam bait: mailto:uce AT ftc DOT gov