C Multithreading: Parallel Functions Guide

1 year ago
Olivia Parker
1 minute

In C programming, it is possible to use multithreading to allow two functions to run in parallel. The pthread library can be used to create threads and have the two functions run in separate threads.

Here is an example code that utilizes the pthread library to create two threads and execute two functions in parallel.

#include <stdio.h>
#include <pthread.h>

void* func1(void* arg) {
    for (int i = 0; i < 10; i++) {
        printf("Function 1: %d\n", i);
    }
    return NULL;
}

void* func2(void* arg) {
    for (int i = 0; i < 10; i++) {
        printf("Function 2: %d\n", i);
    }
    return NULL;
}

int main() {
    pthread_t thread1, thread2;

    pthread_create(&thread1, NULL, func1, NULL);
    pthread_create(&thread2, NULL, func2, NULL);

    pthread_join(thread1, NULL);
    pthread_join(thread2, NULL);

    return 0;
}

In the code above, we have defined two functions, func1 and func2, and created two threads in the main function using the pthread_create function to execute these functions. Finally, we use the pthread_join function to wait for the two threads to finish execution and reclaim resources.

By using multithreading, we can allow two functions to execute in parallel, thus improving the performance and efficiency of the program.

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