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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votes
1 answer
What is the pthread's join prerequisite
With pthread, we cannot join any thread.
What is the prerequisite and why is it there?
According to : https://man7.org/linux/man-pages/man3/pthread_join.3.html
The pthread_join() function waits for the thread specified by
thread to terminate. If…
wazowski
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how do I pass a variables value into the pthread create parameters using a void function?
I'm doing a monte Carlo simulation to calculate pi using threads, I believe the mass of my logic is correct. I just need to pass the correct value into the pthread create function under the C library i'm using, I just don't understand how fulfill…
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Can you get the return value of a thread if it exited before you call join?
If you have a thread A which calls pthread_exit(return_val) before thread B can call
pthread_join(A, ret_val_A), what is the outcome? Does join return as if the thread did not exist?
Clarification: Im not asking if you can join once a thread has…
beans
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1 answer
When does pthread_timedjoin_np() return EBUSY?
I am trying to handle all the possible return values of pthread_timedjoin_np(), but I did not quite understand, when does it return EBUSY?
If the thread returns within the given time pthread_timedjoin_np() always returns zero, while if time has…
madmurphy
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Threads appear to run randomly.. Reliable only after slowing down the join after thread creation
I am observing strange behavior using pthreads. Note the following code -
#include
#include
#include
#include
#include
#include
typedef struct _FOO_{
int ii=0;
std::string…
Rajat Mitra
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- 11
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0 answers
Cython: How to wait for all threads in prange to be all done?
In pure Python (threads co-exist but not parallel), all threads can be waited to be all done by using join method:
ts = [] # Threads
for i in range(10):
ts.append(Thread(func=...))
ts[-1].start()
for i in range(len(ts)):
ts[i].join() #…
Dee
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1 answer
Kill either thread and exit process
I am creating two threads that run independently. When there is an error in one of the threads, I return from that particular thread with return value -1. But I want to kill the other thread and gracefully terminate/ exit the process. How do I…
bvj0412
- 17
- 5
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votes
2 answers
Trouble calling function via pthread
I have a function that counts the number of occurences of a string in a char array. Calling this function normally with findword(copy, "polar") works perfectly fine and prints an int that's the number of times the string "polar" occurs in the char…
kikikey
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- 8
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1 answer
"pthread_join" doesn't return on a just cancelled thread (with "pthread_cancel")
I have a pool of threads (QueueWorkers class) in my program that are released using this logic:
int QueueWorkers::stop()
{
for (unsigned int ix = 0; ix < threadIds.size(); ++ix)
{
pthread_cancel(threadIds[ix]);
…
fgalan
- 11,732
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1 answer
Using pthread_join() on multiple threads giving unexpected behavior
I am learning how to use threads in C and have run into a problem when creating the threads. I am making a program that takes in 2 or more file names as command line arguments, counts the number of bytes in each file in their own thread, and then…
Madison Allen
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- 3
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votes
1 answer
Functionality of pthread_join() in Ubuntu C
Working on a small C code with pthread library. My requirement for this code is to first deposit money then withdraw money.
#include
#include
int counter = 0;
void *increase();
void *decrease();
int balance = 500;
void…
sam
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- 2
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1 answer
pthread_exit() and pthread_join() don't work
I don't know why it doesn't return the value that I type in. I know it's not the void* arg because it prints the right number, but I don't have any idea.
CODE:
#include
#include
#include
#include
#include…
user15432248
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votes
1 answer
Calling pthread_join with one argument causes a segmentation fault?
If I call pthread_join continuously (without using other functions) it will cause a segmentation fault.
I can solve the problem by inserting a sleep(); , printf() or anything else between two calls of pthread_join.
OS & GCC Version:
gcc…
omar.zhou
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votes
2 answers
Multi threading Raytracer
I am making a raytracer, im trying to use pthread to divide the rendering. i noticed that isnt helping with the speed because the function pthread_join is to slow, if i use a loop to make the 'await' is way faster and works almost every time fine.…
Pablots99
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- 1
0
votes
1 answer
pthread getting crashed in C
I am trying multithreading in my C project, using pthread. I was playing with this code but it is getting crashed and don't know why.
#include
#include
int g = 0;
void *myThreadFun(void *vargp)
{
int *myid = (int…
Ayan Bhunia
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