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  1. #include <stdio.h>
  2. #include <pthread.h>
  3.  
  4. #define NUM_THREADS 5
  5. #define MAXCOUNT 1000000
  6.  
  7. int shared_variable = 0;
  8. //pthread_mutex_t mutex; // Mutex declaration
  9.  
  10. void* increment_variable(void* thread_id) {
  11.     for (int i = 0; i < MAXCOUNT; i++) {
  12.         //pthread_mutex_lock(&mutex); // Lock before updating
  13.         shared_variable++;
  14.         //pthread_mutex_unlock(&mutex); // Unlock after updating
  15.     }
  16.     pthread_exit(NULL);
  17. }
  18.  
  19. int main() {
  20.     pthread_t threads[NUM_THREADS];
  21.     //pthread_mutex_init(&mutex, NULL); // Initialize the mutex
  22.  
  23.     for (int i = 0; i < NUM_THREADS; i++) {
  24.         pthread_create(&threads[i], NULL, increment_variable, (void*)(size_t)i);
  25.     }
  26.  
  27.     for (int i = 0; i < NUM_THREADS; i++) {
  28.         pthread_join(threads[i], NULL);
  29.     }
  30.  
  31.     printf("Value of shared variable after race condition handling: %d\n", shared_variable);
  32.  
  33.     //pthread_mutex_destroy(&mutex); // Destroy the mutex
  34.     return 0;
  35. }
  36.  
Success #stdin #stdout 0s 5268KB
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Standard input is empty
stdout
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Value of shared variable after race condition handling: 5000000
https://ideone.com/CQGZC8
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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