cooked

2026-05-16 19:35:27 +00:00 · 2026-05-14 00:24:19 +05:30
commit 447e01fbc3
12 changed files with 479 additions and 0 deletions
@@ -0,0 +1,80 @@
+#include<stdio.h>
+#include<fcntl.h>
+#include<semaphore.h>
+
+int main(){
+    int n, phil, ch;
+    printf("Enter number of philosophers: ");
+    scanf("%d", &n);
+
+    int eating[n];
+    for(int i =0;i<n;i++)
+        eating[i]=0;
+    sem_t *chopstick[n];
+    char name[20];
+
+    for(int i=0;i<n;i++){
+        sprintf(name, "/c%d",i);
+        sem_unlink(name);
+        chopstick[i] = sem_open(name, O_CREAT, 0644, 1);
+    }
+    sem_unlink("/room");
+    sem_t *room = sem_open("/room", O_CREAT, 0644, n-1);
+
+    while(1){
+        printf("---\nDIning philosopher problem----\n");
+        printf("\n1.Pick chopstick(eat)");
+        printf("\n2.Put chopstick(think)");
+        printf("\n3.Exit");
+        printf("\nENter your choice: ");
+        scanf("%d", &ch);
+
+        if(ch==1){
+            printf("\nEnter the philosopher number (0 to %d): ", n-1);
+            scanf("%d",&phil);
+
+            if(eating[phil]){
+                printf("\nprofessor already eating");
+                continue;
+            }
+            sem_wait(room);
+            sem_wait(chopstick[phil]);
+            sem_wait(chopstick[(phil+1)%n]);
+            eating[phil] = 1;
+            printf("\nprofessor %d eating", phil);
+        }
+        else if(ch ==2){
+            printf("\nEnter the philosopher number (0 to %d): ",n-1);
+            scanf("%d", &phil);
+
+            if(!eating[phil]){
+                printf("\nphilosopher not eating");
+                continue;
+            }
+            sem_post(chopstick[phil]);
+            sem_post(chopstick[(phil+1)%n]);
+            sem_post(room);
+            eating[phil] = 0;
+            
+            printf("Philosopher %d finished eating\n",
+                   phil);
+        }
+        else if (ch == 3) {
+            break;
+        }
+
+        else {
+                printf("Invalid choice\n");
+        }
+    
+    }
+
+    for(int i =0;i<n;i++){
+        sprintf(name, "/c%d", i);
+        sem_close(chopstick[i]);
+        sem_unlink(name);
+    }
+    sem_close(room);
+    sem_unlink("/room");
+    return 0;
+}