error running p_threads

[Ivar]

Hi,
So basically in my application I have a a main function that does
this...

//Global variables
pthread_t thread_id;

void* threadtest(void * arg) {
while(1) {
printf("Reached this segment\n");
}
return NULL;
}
int main(int argc, char** argv) {
....
printf("We've reached here!\n");
//Line 500

pthread_create(&thread_id,NULL,threadtest,NULL); //Line 501
....
}
So basically, when I run this code, I dont have my "Reached this
segment" line print out to console (so basically I feel the thread is
not being entered). But when I run in gdb, put a break point at line
500 in main (as shown below) and continue stepping, I reach the thread
code and get no errors....What could be the reason that I see no thread
output?? Is it even getting there? Sorry for my english...I can explain
anything more in detail if necessary...

-Ravi

[Ivar]

Hi,
And this is on Solaris machine

-Ravi

Ivar wrote:

Hi,
So basically in my application I have a a main function that does
this...

//Global variables
pthread_t thread_id;

void* threadtest(void * arg) {
while(1) {
printf("Reached this segment\n");
}
return NULL;
}
int main(int argc, char** argv) {
...
printf("We've reached here!\n");
//Line 500

pthread_create(&thread_id,NULL,threadtest,NULL); //Line 501
...
}
So basically, when I run this code, I dont have my "Reached this
segment" line print out to console (so basically I feel the thread is
not being entered). But when I run in gdb, put a break point at line
500 in main (as shown below) and continue stepping, I reach the thread
code and get no errors....What could be the reason that I see no thread
output?? Is it even getting there? Sorry for my english...I can explain
anything more in detail if necessary...

-Ravi

[coconut1986]

I guess the problem is that sub-thread end with the main thread ends,
maybe you can add one line in the main function:

int main(int argc, char** argv) {
printf("We've reached here!\n");
pthread_create(&thread_id,NULL,threadtest,NULL);
while(1);
}

On 11ÔÂ20ÈÕ, ÉÏÎç7ʱ29·Ö, "Ivar" <[e-mail]:

Hi,
So basically in my application I have a a main function that does
this...

//Global variables
pthread_t thread_id;

void* threadtest(void * arg) {
while(1) {
printf("Reached this segment\n");
}
return NULL;

}int main(int argc, char** argv) {
...
printf("We've reached here!\n");
//Line 500

pthread_create(&thread_id,NULL,threadtest,NULL); //Line 501
...

}So basically, when I run this code, I dont have my "Reached this
segment" line print out to console (so basically I feel the thread is
not being entered). But when I run in gdb, put a break point at line
500 in main (as shown below) and continue stepping, I reach the thread
code and get no errors....What could be the reason that I see no thread
output?? Is it even getting there? Sorry for my english...I can explain
anything more in detail if necessary...

-Ravi

[Ian Collins]

co*********@gmail.com wrote:

Please don't top post.

On 11ÔÂ20ÈÕ, ÉÏÎç7ʱ29·Ö, "Ivar" <[e-mail]:

>>
}So basically, when I run this code, I dont have my "Reached this
segment" line print out to console (so basically I feel the thread is
not being entered). But when I run in gdb, put a break point at line
500 in main (as shown below) and continue stepping, I reach the thread
code and get no errors....What could be the reason that I see no thread
output?? Is it even getting there? Sorry for my english...I can explain
anything more in detail if necessary...

I guess the problem is that sub-thread end with the main thread ends,
maybe you can add one line in the main function:

int main(int argc, char** argv) {
printf("We've reached here!\n");
pthread_create(&thread_id,NULL,threadtest,NULL);
while(1);
}

While the cause is correctly identified, the off topic advice is unwise.

Look up pthread_join() to replace the while.

This question should have been posted to comp.programming.threads.

--
Ian Collins.

[Ivar]

co*********@gmail.com wrote:

I guess the problem is that sub-thread end with the main thread ends,
maybe you can add one line in the main function:

int main(int argc, char** argv) {
printf("We've reached here!\n");
pthread_create(&thread_id,NULL,threadtest,NULL);
while(1);
}

On 11ÔÂ20ÈÕ, ÉÏÎç7ʱ29·Ö, "Ivar" <[e-mail]:

Hi,
So basically in my application I have a a main function that does
this...

//Global variables
pthread_t thread_id;

void* threadtest(void * arg) {
while(1) {
printf("Reached this segment\n");
}
return NULL;

}int main(int argc, char** argv) {
...
printf("We've reached here!\n");
//Line 500

pthread_create(&thread_id,NULL,threadtest,NULL); //Line 501
...

}So basically, when I run this code, I dont have my "Reached this
segment" line print out to console (so basically I feel the thread is
not being entered). But when I run in gdb, put a break point at line
500 in main (as shown below) and continue stepping, I reach the thread
code and get no errors....What could be the reason that I see no thread
output?? Is it even getting there? Sorry for my english...I can explain
anything more in detail if necessary...

-Ravi

Sorry about this, but I actually have a while(1) loop doing other
things in the main function....so the thread wouldn't end before the
main functiojn
Ravi

[Ian Collins]

Ivar wrote:

>
Sorry about this, but I actually have a while(1) loop doing other
things in the main function....so the thread wouldn't end before the
main functiojn

Try posting to comp.programming.threads.

--
Ian Collins.