School Commit Init

Anul 1/Semestrul 2/OS/Labs/threads/test.c

@@ -0,0 +1,61 @@
+#include<stdio.h>
+#include<pthread.h>
+#include<unistd.h>
+#include<stdlib.h>
+
+pthread_mutex_t mutex[2];
+pthread_t* thread_id;
+
+int even_count = 1;
+int odd_count = 0;
+
+void* thread(void* arg)
+{
+    int id = (int)arg+1;
+    int sleep_time = rand()%9+1;
+    printf("Thread %d sleeping for %d seconds\n", id, sleep_time);
+    // usleep(sleep_time*1000000);
+    if(id%2==0)
+    {
+        pthread_mutex_lock(mutex);
+        printf("Thread %d is even ", id);
+        even_count*=id;
+        printf("and even_count is %d\n", even_count);
+        pthread_mutex_unlock(mutex);
+    }
+    else
+    {
+        pthread_mutex_lock(mutex+1);
+        printf("Thread %d is odd ", id);
+        odd_count+=id;
+        printf("and odd_count is %d\n", odd_count);
+        pthread_mutex_unlock(mutex+1);
+    }
+    return NULL;
+}
+
+
+int main(int argc, char *argv[])
+{
+    int n;
+    srand(time(NULL));
+    printf("Enter the number of threads: ");
+    scanf("%d", &n);
+    thread_id = (pthread_t*)malloc(sizeof(pthread_t)*n);
+    pthread_mutex_init(mutex, NULL);
+    pthread_mutex_init(mutex+1, NULL);
+    for(int i=0; i<n; i++)
+    {
+        pthread_create(thread_id+i, NULL, thread, (void*)i);
+    }
+    for(int i=0; i<n; i++)
+    {
+        pthread_join(*(thread_id+i), NULL);
+    }
+    printf("Even count is %d\n", even_count);
+    printf("Odd count is %d\n", odd_count);
+    pthread_mutex_destroy(mutex);
+    pthread_mutex_destroy(mutex+1); 
+    free(thread_id);
+    return 0;
+}