#Pthread c language how to#
#Pthread c language install#

Mind though, if the thread gets canceled, the PTHREAD_CANCELED value is placed at the retval address. Notice that we also store the exit status code of threads in the retval variable and print its value by casting it to int. pthreads works on the system: gcc -o what what.c /tmp/ccI6m52b.o: In function main: what.c: (.text+0x37): undefined reference to pthreadcreate what.c: (.text+0x48): undefined reference to pthreadjoin collect2: error: ld returned 1 exit status gcc -pthread -o what what.c. Then, the calling thread waits for every thread with the pthread_join call in the loop. In the following example, we demonstrate the program that creates 8 threads and executes the printHello function in each of them. It is best used in multi-core systems or processors to implement threads on the kernel to achieve the system. It is also known as a POSIX thread that allows users to create many threads for simultaneous processes to flow. This function is called from within the parent thread and the first argument is the thread ID of the thread to wait on and the second argument is the return value of the thread on.

If the user does not want to retrieve the exit code of the waited thread, NULL value should be passed as the second argument. In Linux platforms, the C and C++ languages pthread standard API for all kinds of thread related functions. include int pthreadjoin(pthreadt thread, void rvalptr) The function above makes sure that its parent thread does not terminate until it is done.

pthread_join takes only two arguments: thread id to specify the waited thread and pointer to void* where exit status of the specified thread can be stored. Use the pthread_join Function to Wait for Thread TerminationР”Р„ program creates threads with the pthread_create function, and usually, it waits for them to terminate with the pthread_join function.

#Pthread c language how to#

This article will explain several methods of how to use the pthread_join function in C.

#Pthread c language install#

Use the pthread_join Function Return Value to Check for Errors answered as: How can I compile a C program that uses the pthread.h library in a Linux/Mac terminal If you install XCode from the Apple Developers kit.

Second, you have to rethink the return type of pthreadcreate and modify line 62.

Use the pthread_join Function to Wait for Thread Termination Hello I accidentally saw your code, but there are two things that are wrong.