Bankers-Algo

bankersalgo.c

@@ -0,0 +1,64 @@
+/ Banker's Algorithm 
+#include <stdio.h> 
+int main() 
+{ 
+
+
+    int n, m, i, j, k; 
+    n = 5; // Number of processes 
+    m = 3; // Number of resources 
+    int alloc[5][3] = { { 0, 1, 0 },  
+                        { 2, 0, 0 },  
+                        { 3, 0, 2 }, 
+                        { 2, 1, 1 }, 
+                        { 0, 0, 2 } }; 
+
+    int max[5][3] = { { 7, 5, 3 }, 
+                      { 3, 2, 2 }, 
+                      { 9, 0, 2 }, 
+                      { 2, 2, 2 }, 
+                      { 4, 3, 3 } }; 
+
+    int avail[3] = { 3, 3, 2 }; // Available Resources 
+
+    int f[n], ans[n], ind = 0; 
+    for (k = 0; k < n; k++) { 
+        f[k] = 0; 
+    } 
+    int need[n][m]; 
+    for (i = 0; i < n; i++) { 
+        for (j = 0; j < m; j++) 
+            need[i][j] = max[i][j] - alloc[i][j]; 
+    } 
+    int y = 0; 
+    for (k = 0; k < 5; k++) { 
+        for (i = 0; i < n; i++) { 
+            if (f[i] == 0) { 
+
+                int flag = 0; 
+                for (j = 0; j < m; j++) { 
+                    if (need[i][j] > avail[j]){ 
+                        flag = 1; 
+                         break; 
+                    } 
+                } 
+
+                if (flag == 0) { 
+                    ans[ind++] = i; 
+                    for (y = 0; y < m; y++) 
+                        avail[y] += alloc[i][y]; 
+                    f[i] = 1; 
+                } 
+            } 
+        } 
+    } 
+
+    printf("Following is the SAFE Sequence\n"); 
+    for (i = 0; i < n - 1; i++) 
+        printf(" P%d ->", ans[i]); 
+    printf(" P%d", ans[n - 1]); 
+
+    return (0); 
+
+
+}