fork download
copy 
  1. #include <pthread.h>
  2. #include <stdio.h>
  3. #include <stdlib.h>
  4. #include <unistd.h>
  5. #include <string.h>
  6. #include <semaphore.h>
  7.  
  8. #define THREAD_NUM 4
  9.  
  10. sem_t semaphore;
  11.  
  12. void* routine(void* args) {
  13.     sem_wait(&semaphore);
  14.     sleep(1);
  15.     printf("Hello from thread %d\n", *(int*)args);
  16.     sem_post(&semaphore);
  17.     free(args);
  18. }
  19.  
  20. int main(int argc, char *argv[]) {
  21.     pthread_t th[THREAD_NUM];
  22.     sem_init(&semaphore, 0, 4);
  23.     int i;
  24.     for (i = 0; i < THREAD_NUM; i++) {
  25.         int* a = malloc(sizeof(int));
  26.         *a = i;
  27.         if (pthread_create(&th[i], NULL, &routine, a) != 0) {
  28.             perror("Failed to create thread");
  29.         }
  30.     }
  31.  
  32.     for (i = 0; i < THREAD_NUM; i++) {
  33.         if (pthread_join(th[i], NULL) != 0) {
  34.             perror("Failed to join thread");
  35.         }
  36.     }
  37.     sem_destroy(&semaphore);
  38.     return 0;
  39. }
Success #stdin #stdout 0.01s 5284KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
Hello from thread 3
Hello from thread 2
Hello from thread 1
Hello from thread 0
https://ideone.com/dkArsf
language:
C (gcc 8.3)
created:
16 days ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!