Re: problem handling POSIX thread on FreeBSD
Not sure I understand the question. What do you mean by S.O?
, sorry by my badly english, the correct word is O.S (operative system).
you saying that since the threads are POSIX, that you would expect
the program to act the same on all Operating Systems?
exactly, that thought before your answer. I thought that a same code
was executed of the same form so much in Solaris, in GNU/Linux and
FreeBSD. At least than had shown the same results.
really I do not know because Linux and solaris they show me:
hilo1: puntero contiene 0
hilo2: puntero contiene 0
hilo1: puntero contiene 0
hilo2: puntero contiene 3
hilo1: puntero contiene 2
hilo2: puntero contiene 6
hilo1: puntero contiene 4
hilo2: puntero contiene 9
hilo1: puntero contiene 6
hilo2: puntero contiene 12
hilo1: puntero contiene 8
hilo2: puntero contiene 15
hilo1: puntero contiene 10
hilo2: puntero contiene 18
hilo1: puntero contiene 12
hilo2: puntero contiene 21
hilo1: puntero contiene 14
hilo2: puntero contiene 24
hilo1: puntero contiene 16
finaliza hilo1 con id 1082231728
hilo2: puntero contiene 27
finaliza hilo2 con id 1090624432
fin hilo 2
sadly in my university we work with Solaris:' (
--
I repeat part of the code:
/* file: test.c */
#includepthread.h
char buffer[512];
pthread_mutex_t mutex, mutex2;
pthread_t hilo1, hilo2;
void f1(void* ptr)
{
int i,n=10;
int valor=0;
char*p=(char*)ptr;
for(i=0;in;i++)
{
pthread_mutex_lock(mutex);
sscanf(p,%d,valor);
printf(\thilo1: puntero contiene %d\n, valor);
valor=i*3;
sprintf(p, %d,valor);
pthread_mutex_unlock(mutex2);
}
valor=(int)pthread_self();
printf(finaliza hilo1 con id %d\n, valor);
pthread_exit(valor);
}
void f2(void* ptr)
{
int i,n=10;
int valor=0;
char*p=(char*)ptr;
for(i=0;in;i++)
{
pthread_mutex_lock(mutex2);
sscanf(p,%d,valor);
printf(hilo2: puntero contiene %d\n, valor);
valor=i*2;
sprintf(p, %d,valor);
pthread_mutex_unlock(mutex);
}
valor=(int)pthread_self();
printf(finaliza hilo2 con id %d\n, valor);
pthread_exit(valor);
}
int main()
{
pthread_attr_t atributos;
memset(buffer, '\0', sizeof(buffer));
pthread_mutex_init(mutex, NULL); //linux
pthread_mutex_init(mutex2, NULL); //linux
pthread_mutex_lock(mutex2); /* ¿? */
if(pthread_attr_init(atributos) 0)
{
perror(pthread_attr_init);
exit(-1);
}
if(pthread_attr_setscope(atributos,PTHREAD_SCOPE_PROCESS) 0)
{
perror(pthread_attr_setscope);
exit(-2);
}
if(pthread_create (hilo1, atributos, (void*)f1, (void*)buffer)0)
{
perror(pthread_create hilo1);
exit(-2);
}
if(pthread_create(hilo2, atributos, (void*)f2, (void*)buffer)0)
{
perror(pthread_create hilo2);
exit(-2);
}
.
}
you believe that a mutex not necessarily must be unlocked by the same
thread that locks it?
sorry but my badly english, but I am making an effort to me so that
you manage to understand to me.
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Re: problem handling POSIX thread on FreeBSD
Ok, I understand, but by being threads POSIX should be executed of the same one in any type of S.OR? thanks to all -- Concepción, Chile. ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: problem handling POSIX thread on FreeBSD
S.O , sorry -- Concepción, Chile. ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to [EMAIL PROTECTED]
problem handling POSIX thread on FreeBSD
/* file: taller.c */
int main() {
if(pthread_attr_setscope(attr, PTHREAD_SCOPE_SYSTEM) != 0)
/* handler */
}
$ gcc taller.c -pthread
$ ./a.out
pthread_attr_setscope: Unknown error: 0
$
PTHREAD_SCOPE_SYSTEM fail on freebsd ?
help me please...
very thanks...
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Re: problem handling POSIX thread on FreeBSD
Hi, very thanks you... i running fbsd v4.11 stable. -- Concepción, Chile. ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: problem handling POSIX thread on FreeBSD
/* file: test.c */
#includestdio.h
#includepthread.h
#includestring.h
#includeunistd.h
#includestdlib.h
char buffer[512];
pthread_mutex_t mutex, mutex2;
pthread_t hilo1, hilo2;
void f1(void* ptr)
{
int i,n=10;
int valor=0;
char*p=(char*)ptr;
for(i=0;in;i++)
{
pthread_mutex_lock(mutex);
sscanf(p,%d,valor);
printf(\thilo1: puntero contiene %d\n, valor);
valor=i*3;
sprintf(p, %d,valor);
pthread_mutex_unlock(mutex2);
}
valor=(int)pthread_self();
printf(finaliza hilo1 con id %d\n, valor);
pthread_exit(valor);
}
void f2(void* ptr)
{
int i,n=10;
int valor=0;
char*p=(char*)ptr;
for(i=0;in;i++)
{
pthread_mutex_lock(mutex2);
sscanf(p,%d,valor);
printf(hilo2: puntero contiene %d\n, valor);
valor=i*2;
sprintf(p, %d,valor);
pthread_mutex_unlock(mutex);
}
valor=(int)pthread_self();
printf(finaliza hilo2 con id %d\n, valor);
pthread_exit(valor);
}
int main()
{
pthread_attr_t atributos;
//pthread_mutexattr_t mutexattr; - solaris
memset(buffer, '\0', sizeof(buffer));
/*
if(pthread_mutexattr_setpshared(mutexattr,PTHREAD_PROCESS_PRIVATE)!=0)
//solaris
{
perror(pthread_mutexattr_setpshared);
exit(-12);
}
*/
pthread_mutex_init(mutex, NULL); //linux
pthread_mutex_init(mutex2, NULL); //linux
pthread_mutex_lock(mutex2); /
/*if(pthread_mutex_init(mutex, mutexattr)!=0) //solaris
{
perror(pthread_mutex_init);
exit(-2);
}*/
if(pthread_attr_init(atributos) 0)
{
perror(pthread_attr_init);
exit(-1);
}
if(pthread_attr_setscope(atributos,PTHREAD_SCOPE_PROCESS) 0)
{
perror(pthread_attr_setscope);
exit(-2);
}
if(pthread_create (hilo1, atributos, (void*)f1, (void*)buffer)0)
{
perror(pthread_create hilo1);
exit(-2);
}
if(pthread_create(hilo2, atributos, (void*)f2, (void*)buffer)0)
{
perror(pthread_create hilo2);
exit(-2);
}
if(pthread_join(hilo2, NULL)0)
{
perror(pthread_join hilo1 );
exit(-3);
}
puts(fin hilo 2);
/*if(pthread_join(hilo1, NULL)0)
{
perror(pthread_join hilo2 );
exit(-3);
}*/
pthread_mutex_destroy(mutex);
exit(0);
}
output in solaris and linux: (gcc test.c -lpthread)
hilo1: puntero contiene 0
hilo2: puntero contiene 0
hilo1: puntero contiene 0
hilo2: puntero contiene 3
hilo1: puntero contiene 2
hilo2: puntero contiene 6
hilo1: puntero contiene 4
hilo2: puntero contiene 9
hilo1: puntero contiene 6
hilo2: puntero contiene 12
hilo1: puntero contiene 8
hilo2: puntero contiene 15
hilo1: puntero contiene 10
hilo2: puntero contiene 18
hilo1: puntero contiene 12
hilo2: puntero contiene 21
hilo1: puntero contiene 14
hilo2: puntero contiene 24
hilo1: puntero contiene 16
finaliza hilo1 con id 1082231728
hilo2: puntero contiene 27
finaliza hilo2 con id 1090624432
fin hilo 2
output on FreeBSD v4.11 STABLE (gcc test.c -pthread):
hilo1: puntero contiene 0
hilo1: puntero contiene 0
hilo1: puntero contiene 3
hilo1: puntero contiene 6
hilo1: puntero contiene 9
hilo1: puntero contiene 12
hilo1: puntero contiene 15
hilo1: puntero contiene 18
hilo1: puntero contiene 21
hilo1: puntero contiene 24
finaliza hilo1 con id 134534144
why ??
help me please :-).
--
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help me with C languaje please, re: files.
Hi all, I am programming in C and I need to read a quantity of lines of a file. How can I know when a line arrives at his end? exists some special character? exists some file in C in the kernel of FreeBSD (4.11) where I can find somewhat similar? example: how read four lines of a file. thanks and sorry for my badly English. -- Concepción, Chile. ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: help me with C languaje please, re: files.
#include stdio.h
#include stdlib.h
int main(void) {
FILE *p_to_f;
char buf[1024];
int i, j = 0;
p_to_f = fopen(test,r);
if(p_to_f == NULL) {
perror(fopen);
exit(EXIT_FAILURE);
}
for(i = 0; i 4 !feof(p_to_f); i++) {
fgets(buf,1024,p_to_f);
printf(%s, buf);
}
fclose(p_to_f);
return 0;
}
I expect that be well what I did. Thanks Victor.
PD Corrigeme Si hay algo malo. :D
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Re: Files in C.
Greg, i am going to keep in mind your words. In fact I expect to guide me for more than an opinion. Hopefully they accept occasionally some my code written in C so that they help me to perfect it and i hope be not an inconvenience. PD. Any objection with the previous thing tell it to me please. -- Concepción, Chile. ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Files in C.
what do they think of the book: Advanced Programming In The Unix Environment (Richard Stevens) ?? is a good option to learn C on Unix ? -- Concepción, Chile. ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Files in C.
thanks to all by responding me, I will have present each one of its mail PD. I thank to the community of FreeBSD by facilitating me its aid. TnX from Chile. -- Concepción, Chile. ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to [EMAIL PROTECTED]
Files in C.
I know that this is not the place to consult on programming C. But I am so enthusiastic in FreeBSD that I want to learn more on the language C and someday coming to be a small part of which you already are. It wanted that they recommended to me some webpage where to be able to obtain information on files in C. I want to learn well to work with Files. I need to know the best place where to obtain information and I know that you know it. Bye and very very thanks. PD. thousand excuses by my terrible English. they say that more idiot is the one than does not ask. Dicen que más tonto es aquél que no pregunta. -- Concepción, Chile. ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: Files in C.
Thanks by responding me. I will revise each direction that have given me and truly I thank it a lot. -- Concepción, Chile. ___ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to [EMAIL PROTECTED]
