The `pthread_join()` function is part of pthread.h used to wait for another thread to finish executing.
A call to pthread_join(t, ...) suspends execution of the caller's thread. It does not return until thread t has finished executing.
Questions tagged [pthread-join]
257 questions
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vote
2 answers
Why can't use ** to get return value of pthread_join
I used pthread_join function met a problem at yesterday,it's appear complie error, I have search it long time on net, but have no solve it.
pthread_join.c:
#include
#include
void* say_hello(void* args)
{
printf("hello…
Marcos
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1
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3 answers
Create threads without pthread_join in C
In this segment of code, how can I create those threads without the use of the function pthread_join()? Using pthread_exit() didn't work.
#include
#include
#include
#include
#include
#include…
sh1ftz
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1 answer
Pthreads - Can I detach from a thread and then join in main?
What I want to do is something on lines of...
pthread_create(&producer_thread, &to_join, producer_routine, &queue);
pthread_detach(producer_thread);
...
...
pthread_join(producer_thread, NULL);
Is this possible in some way, on running the above…
ashfaq
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1
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1 answer
Integrating pthread_create() and pthread_join() in the same loop
I am new to multi-threaded programming and I am following this tutorial. In the tutorial, there is a simple example showing how to use pthread_create() and pthread_join(). My question: why can we not put pthread_join() in the same loop as…
Sonu Mishra
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1 answer
Predict output of concurrent code
This is a question related to coursework that I got wrong earlier, and I cannot figure out why.
The following code is given:
int i = 0;
void *doit(void *vargp) {
i = i + 5;
}
int main() {
pthread_t tid;
ptr = &i;
…
Naldhelaan
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1
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2 answers
Segmentation Fault during pthread_join()
I've got a program which has 10 Guest threads, 1 check-in thread, and 1 check-out thread. All threads are created using pthread_create() within my Main() method.
The whole thing runs well until the end where the Main() method is supposed to…
Tawm
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1 answer
pthread lack of synchronization
I have the following code.
This code is for a TFTP server that creates a fork or a thread for each request that is receives. My problem is in the thread methods.
E.g I request 30 files from the server, is should creat 30 threads and give the…
rafaelcpalmeida
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0 answers
Using an array in a struct with pthread_join
I need some help with this. I am making a threaded factor program. Takes arguments from the command line, finds the prime factors and outputs them.
However, my problem is that if I have multiple arguments being passed in (e.x. 20 15 10 5), all of my…
Desync
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2 answers
Using pthread in simple C++ OpenCV project
I am trying to use pthread in my OpenCV Project.
Intially I am simply trying to open two different images using two different threads.
On Windows7 + VS2010 + pthreads-win32 lib, the program runs well.
But on my Debian jessei machine (Opencv 2.4.1),…
kernelman
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1
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1 answer
Calling pthread_join on a pthread_t which may not have been created
We have a class that has a protected pthread_t variable. Once that class has been constucted, the pthread_t exists, but it hasn't had an ID assigned to it which is what pthread_create does.
Is it OK to call pthread_join on the pthread_t variable in…
Lieuwe
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0 answers
Segmentation Fault pthread_join because pthread_t id changed to 0
I am writing a C program with pthread. After I start my threads and execute them, something changes the value of one of my two pthreads to 0 in the background for a not explainable reason for me.
On my machine, this problem already occurs between …
Mao
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1
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1 answer
pthread_join Segmentation fault
I am trying to use pthread_join with this producer-consumer program but I keep getting a segmentantion fault. My purpose is to wait for all the producer threads to end and then terminate all the consumers. But after the first thread joins I get a…
makripx
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1 answer
pthread_join seems to modify my loop index
My code (see below) produces an odd behaviour. The output is:
Testing whether there are problems with concurrency ...rc is 0. i is 0
.rc is 0. i is 0
.rc is 3. i is 1
.rc is 0. i is 0
.rc is 3. i is 1
.rc is 3. i is 2
.rc is 0. i is 0
.rc is 3. i is…
Martze
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1
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2 answers
Is it necessary to free the memory malloced for Pthreads?
The code is as follows:
pthread_t *threads;
pthread_attr_t pta;
threads = (pthread_t *) malloc(sizeof(pthread_t) * NumThreads);
pthread_attr_init(&pta);
for(i=0; i
mining
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1 answer
create Pthreads in loop
I create some threads in a for loop and after this loop, join them in other loop. they do their function till all of them finish it,do they? my last result is logically wrong . my result is correct, just when join each thread after create it!!
user3416282
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