02-15-2011
Quote:
Originally Posted by
zing_foru
Hi all,
Can I create multiple threads using single thread_id
pthread_create does not
take a thread ID, it
overwrites the value of thread_id. That's why it's a pointer, you're telling it what memory to overwrite.
So you could create lots with the same variable, but you'd just be overwriting the same value every time and losing track of everything but the last created thread, not creating threads with the same ID.
8 More Discussions You Might Find Interesting
1. IP Networking
Hi All,
Please explain me when i have to use multiple process and when I have to use Multiple threads? Please give me an example.It will be very helpful for me.
Thanks in advance. (0 Replies)
Discussion started by: ashleykumar
0 Replies
2. IP Networking
Hi Friends,
I have written a program which will listener for more than 1000 requests per second from a single socket descriptor and then it will process those requestes. Its taking X amount of time. Now i want to reduce that time. Will I can write multiple threads to receive the... (2 Replies)
Discussion started by: pa.chidhambaram
2 Replies
3. Solaris
We're just migrating a large application from a Sun E6900 to T5440. One of the component parts is not playing, and despite a pretty detailed truss trace, it's not obvious why we're getting a SEGV fault! Just wondering if it's running multithreaded and the threads are getting mixed up, so 2... (1 Reply)
Discussion started by: JerryHone
1 Replies
4. Shell Programming and Scripting
Hi,
I have a requirement with,
No~Dt~Notes
1~2011/08/1~"aaa
bbb
ccc
ddd
eee
fff
ggg
hhh"
Single column alone got splitted into multiple lines.
I require the output as
No~Dt~Notes
1~2011/08/1~"aaa<>bbb<>ccc<>ddd<>eee<>fff<>ggg<>hhh"
mean to say those new lines to be... (1 Reply)
Discussion started by: Bhuvaneswari
1 Replies
5. Programming
I have a simple client/server program I am using for learning purposes.
I have it setup so that after server is setup and listening it than goes into a loop where it accepts incoming client connections. After each connection, the client socket is than passed to a thread routine where it can be... (3 Replies)
Discussion started by: Majortom71
3 Replies
6. Shell Programming and Scripting
Hi friends,
I have a some files in a directory. for example
856-abc
856-def
851-abc
945-def
956-abc
852-abc
i want to display only those files whose name starts with 856* 945* and 851* using a single pattern.
i.e
856-abc
856-def
851-abc
945-def
the rest of the two files... (2 Replies)
Discussion started by: Little
2 Replies
7. UNIX for Advanced & Expert Users
I would like to know is there any we can kill a single thread among multiple threads belongs to process?
Since Signal action is process wise not per thread, i strongly feel that we can not or for that mater from external sources as well single thread can not be killed which is critical section... (2 Replies)
Discussion started by: murali242512
2 Replies
8. HP-UX
Hi All,
When i was trying to get total number of threads per java process using this command ps -o NLWP PID, I'm not getting any output. Could someone help me in this issue.
Thanks,
GMar (1 Reply)
Discussion started by: mgangumolu
1 Replies
LEARN ABOUT CENTOS
pthread_join
PTHREAD_JOIN(3) Linux Programmer's Manual PTHREAD_JOIN(3)
NAME
pthread_join - join with a terminated thread
SYNOPSIS
#include <pthread.h>
int pthread_join(pthread_t thread, void **retval);
Compile and link with -pthread.
DESCRIPTION
The pthread_join() function waits for the thread specified by thread to terminate. If that thread has already terminated, then
pthread_join() returns immediately. The thread specified by thread must be joinable.
If retval is not NULL, then pthread_join() copies the exit status of the target thread (i.e., the value that the target thread supplied to
pthread_exit(3)) into the location pointed to by *retval. If the target thread was canceled, then PTHREAD_CANCELED is placed in *retval.
If multiple threads simultaneously try to join with the same thread, the results are undefined. If the thread calling pthread_join() is
canceled, then the target thread will remain joinable (i.e., it will not be detached).
RETURN VALUE
On success, pthread_join() returns 0; on error, it returns an error number.
ERRORS
EDEADLK
A deadlock was detected (e.g., two threads tried to join with each other); or thread specifies the calling thread.
EINVAL thread is not a joinable thread.
EINVAL Another thread is already waiting to join with this thread.
ESRCH No thread with the ID thread could be found.
CONFORMING TO
POSIX.1-2001.
NOTES
After a successful call to pthread_join(), the caller is guaranteed that the target thread has terminated.
Joining with a thread that has previously been joined results in undefined behavior.
Failure to join with a thread that is joinable (i.e., one that is not detached), produces a "zombie thread". Avoid doing this, since each
zombie thread consumes some system resources, and when enough zombie threads have accumulated, it will no longer be possible to create new
threads (or processes).
There is no pthreads analog of waitpid(-1, &status, 0), that is, "join with any terminated thread". If you believe you need this function-
ality, you probably need to rethink your application design.
All of the threads in a process are peers: any thread can join with any other thread in the process.
EXAMPLE
See pthread_create(3).
SEE ALSO
pthread_cancel(3), pthread_create(3), pthread_detach(3), pthread_exit(3), pthread_tryjoin_np(3), pthreads(7)
COLOPHON
This page is part of release 3.53 of the Linux man-pages project. A description of the project, and information about reporting bugs, can
be found at http://www.kernel.org/doc/man-pages/.
Linux 2008-11-27 PTHREAD_JOIN(3)