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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Most efficient way to spawn n pthreads with the same parameters in C
I have 32 threads that I know the input parameters to ahead of time, nothing changes inside the function (other than the memory buffer that each thread interacts with).
In pseudo C code this is my design pattern:
// declare 32 pthreads as global…
lee
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1 answer
C Code: Can somebody explain why process ID printed is the same in this example?
I've tried quite some time to analyse this and I can come up with only one answer - that the process ID printed will be different. but gcc is printing the same value. Can anybody explain why its so?
Please find below…
Arun
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after pthread_cancel(), pthread_join() function call hangup
I have written an application, which creates a thread and runs into while loop.
In the application after spawning a thread, i have overridden the fork() syscall with pthread_atfork().
[when fork is called, a prepare function call is called which…
Sachin S Shetty
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1 answer
How to convert * to double/float with pthread, pthread_exit
I need to create a program which calculates recursion (for certain sequence). When I use int and decleare a recursion, that calculates values without floating numbers (like fibonacci sequence, which returns only neutral numbers) it works. However,…
Michał
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1 answer
Writing and reading from a buffer with pthread
I am trying to use pthread. In my code below I have defined two global variables (arg1 and arg2) and in the main function I start filling each element of arg2 with 1. I want the pthread to print the 101-th element of arg2 as soon as it is filled by…
zahra
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PThread Segmentation Fault, Incrementor/Decrementor
I keep getting a Seg Fault, im assuming its trying to access past DECREMENTORS 4 that doesn't exit.
I added in a couple of print statements to help narrow the problem.
What im trying to create is a simple increment, decrement program of a threads…
Dreeww
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gcc segmentation fault if pthread_create is called
This piece of code seems to throw a segmentation fault, but if the pthread_create line is commented out, the segfault disappears.
pthread_t thread_id[device_count];
if (params.revision == 3) {
startTime = time(NULL);
unsigned long number =…
Amit
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Why printf is not working with multple threads in c?
In the code below I create 8 threads and each of those prints a string and its id. However, I don't see any printf output in stdout from PrintHello function. One strange thing that is happening is that if run the main using debugger (CLion) printf…
Yos
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using a pthread read a file and perform an operation
I am fairly new to C and I am making a C program that should works like this:
it has one thread which reads a file with a double on each line of the file, and:
it should be able to read files of any size.
after reading the double it should perform…
S. N
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Program compiled by apple clang can't read the latest TLS data in pthread_key_create destructor
Under Macos, program compiled by apple clang can't read the latest TLS data in pthread_key_create destructor, while if it is compiled by gcc at the same environment, it works as expected.
Here is a self-contained example:
#include
#include…
zjs
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3 answers
pthread_detach doesn't change anything
I understand pthread_detach(pid) that: "storage for the thread thread can be reclaimed when that thread terminate" (as per http://pubs.opengroup.org/onlinepubs/7908799/xsh/pthread_detach.html)
However, I understand that means that once the pid…
Ziad
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1 answer
POSIX returning and printing array prthread_join()?
I am trying to find the prime factorization of multiple numbers. If the user types 15 80 77 it will create a thread for each input and have the thread return a array of the factorization which will then be printed. However I am recieving two errors.…
user9443617
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1 answer
Increasing a global counter variable from within a thread without having to wait for each individual thread
My goal is to create a program that evaluates the performance gains from increasing the number of threads the program can use. I evaluate the performance by using the Monte Carlo method to calculate pi. Each thread should create 1 random coordinate…
Razonixx
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program intermittently stuck with main reporting a different thread id as opposed to the thread itself
I am trying to figure out how multi-threading works, this is my code :
#include
#include
#include
#include
#include
#include
static pthread_cond_t threadDied =…
AshR
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Pause a thread on a controller method call C#
My Question is about C# Threading.
I want to pause a Thread on a controller method call.
I have a little idea that it can be done by joining our main thread from my already running thread to whom I want to pause until controller method completes…
Shehryar Khan
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