cooked

3.c

@@ -0,0 +1,54 @@
+#include<stdio.h>
+#include<semaphore.h>
+#include<fcntl.h>
+
+int main(){
+    int read_count = 0;
+    int data= 0;
+
+    sem_unlink("/mutex"); sem_unlink("/wrt");
+    sem_t *mutex = sem_open("/mutex", O_CREAT, 0644, 1);
+    sem_t *wrt = sem_open("/wrt", O_CREAT, 0644, 1);
+
+    int choice;
+    while(1){
+    printf("\n1.Read");
+    printf("\n2.Write");
+    printf("\n3.exit");
+    printf("\nEnter the choice: ");
+    scanf("%d", &choice);
+
+    if(choice ==1){
+        sem_wait(mutex);
+        read_count++;
+        if(read_count==1)
+            sem_wait(wrt);
+        sem_post(mutex);
+
+        printf("read data: %d | Active readers: %d", data, read_count);
+
+        sem_wait(mutex);
+        read_count--;
+        if(read_count==0)
+            sem_post(wrt);
+        sem_post(mutex);
+    }
+    else if(choice ==2){
+        sem_wait(wrt);
+        data+=10;
+        printf("wrote data: %d", data);
+        sem_post(wrt);
+    }else{
+        break;
+    }
+
+    }
+        sem_close(mutex);
+    sem_close(wrt);
+    sem_unlink("/mutex");
+    sem_unlink("/wrt");
+
+
+
+    return 0;
+}