05-25-2009
Thanks for your reply and clarification that problem is reproducible everytime..
I have a doubt,that if we call pthread_exit(0); then Thread0 terminates definately right?? If Thread0 terminates then in Thread1() why to call pthread_join function again??What's the use of calling pthread_join() in Thread1().Could you please clarify??
Pthread_join()-waits for the termination of target thread(here Thread0).
But in our case,thread0 terminated right.
Thanks,
Mansa
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LEARN ABOUT FREEBSD
pthread_timedjoin_np
PTHREAD_JOIN(3) BSD Library Functions Manual PTHREAD_JOIN(3)
NAME
pthread_join, pthread_timedjoin_np -- wait for thread termination
LIBRARY
POSIX Threads Library (libpthread, -lpthread)
SYNOPSIS
#include <pthread.h>
int
pthread_join(pthread_t thread, void **value_ptr);
int
pthread_timedjoin_np(pthread_t thread, void **value_ptr, const struct timespec *abstime);
DESCRIPTION
The pthread_join() function suspends execution of the calling thread until the target thread terminates unless the target thread has already
terminated.
On return from a successful pthread_join() call with a non-NULL value_ptr argument, the value passed to pthread_exit() by the terminating
thread is stored in the location referenced by value_ptr. When a pthread_join() returns successfully, the target thread has been terminated.
The results of multiple simultaneous calls to pthread_join() specifying the same target thread are undefined. If the thread calling
pthread_join() is cancelled, then the target thread is not detached.
The pthread_timedjoin_np() function is equivalent to the pthread_join() function except it will return ETIMEDOUT if target thread does not
exit before specified absolute time passes.
A thread that has exited but remains unjoined counts against [_POSIX_THREAD_THREADS_MAX].
RETURN VALUES
If successful, the pthread_join() and pthread_timedjoin_np() functions will return zero. Otherwise an error number will be returned to indi-
cate the error.
ERRORS
The pthread_join() and pthread_timedjoin_np() functions will fail if:
[EINVAL] The implementation has detected that the value specified by thread does not refer to a joinable thread.
[ESRCH] No thread could be found corresponding to that specified by the given thread ID, thread.
[EDEADLK] A deadlock was detected or the value of thread specifies the calling thread.
[EOPNOTSUPP] The implementation detected that another caller is already waiting on thread.
Additionally, the pthread_timedjoin_np() function will fail if:
[ETIMEDOUT] The specified absolute time passed while pthread_timedjoin_np() waited for thread exit.
SEE ALSO
wait(2), pthread_create(3)
STANDARDS
The pthread_join() function conforms to ISO/IEC 9945-1:1996 (``POSIX.1''). The pthread_timedjoin_np() is a FreeBSD extension which first
appeared in FreeBSD 6.1.
BSD
January 23, 2010 BSD