Date: Mon, 7 Feb 2000 00:16:13 -0500 (EST) From: Spidey <beaupran@iro.umontreal.ca> To: Freebsd Questions Mailing list <freebsd-questions@freebsd.org> Subject: PThreads Message-ID: <14494.21789.847287.358066@anarcat.dyndns.org>
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Hi!
I am currently working on a program that needs pthreads.
Is there some bugs in FBSD implementation of the pthreads? Because I'm
having serious problems here:
The following code, when executed, gives me something really weird:
$ ./test .
Dir entry: 0x8055008, .
Dir entry: 0x8055014, ..
Dir entry: 0x8055020, thread.c
Dir entry: 0x8055034, Makefile
Dir entry: 0x8055048, thread
Dir entry: 0x805505c, thread.c,v
Dir entry: 0x8055070, tp4.txt
Dir entry: 0x8055080, thread.core
Dir entry: 0x8055094, test.c
Dir entry: 0x80550a4, test
thread id 134529536, &arg: 0x8055008, arg: .
thread id 134530560, &arg: 0x8055014, arg: =FF=FF=FF=FF=FF=FF=FF=FF=FF=FF=
=FF=FF=FF=FF=FF=FF=FF=FF=FF=FF=FF=FF=FF=FF=FF=FF=FF=FFGC
thread id 134531072, &arg: 0x8055020, arg: =FF=FF=FF=FF=FF=FF=FF=FF=FF=FF=
=FF=FF=FF=FF=FF=FFGC
thread id 134531584, &arg: 0x8055034, arg: Makefile
thread id 134532096, &arg: 0x8055048, arg: thread
thread id 134532608, &arg: 0x805505c, arg: thread.c,v
thread id 135094272, &arg: 0x8055070, arg: tp4.txt
thread id 135094784, &arg: 0x8055080, arg: thread.core
thread id 135095296, &arg: 0x8055094, arg: test.c
thread id 135095808, &arg: 0x80550a4, arg: test
$
This is the source file. Compiled it with:
$ gcc test.c -Wall -pthread -DDEBUG -o test
$
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#include <err.h>
#include <pthread.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/wait.h>
#include <fcntl.h>
#include <dirent.h>
// un plafond initial pour le nombre de threads maximum
#ifndef MAX_THREADS
#define MAX_THREADS 50
#endif
void * statfile(void *arg) {
=20
printf("thread id %li, &arg: %p, arg: %s\n", (long int) pthread_self(=
), arg, (char*) arg);
return 0;
}
extern int main (int argc, char** argv) {
int i, threadCnt =3D 0;
pthread_t thread[MAX_THREADS];
DIR *directory;
struct dirent* entry;
// on ouvre le r=E9pertoire en argument
directory =3D opendir(argv[1]);
=20
for (i =3D 0; (entry =3D readdir(directory) ) !=3D NULL; i++) {
if (i+1 <=3D MAX_THREADS) {
=20
// cr=E9ation du thread
if (pthread_create(& (thread[i]), NULL, statfile, entry->d_name) =
!=3D 0)
=09warn("main");
printf("Dir entry: %p, %s\n", entry->d_name, entry->d_name);
}
} // prochain fichier du r=E9pertoire
=20
threadCnt =3D i;
(void)closedir(directory);
=20
// on attend que les enfants se terminent
for (i =3D 0; i < threadCnt; i++) {
pthread_join(thread[i], NULL);
}
return 0;
} // fin
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Is there something I do not understand in pthreads or what???
Thanks a lot for any input
The AnarCat
--
Si l'image donne l'illusion de savoir
C'est que l'adage pretend que pour croire,
L'important ne serait que de voir
Lofofora
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