update name of code to labcodes

labcodes/lab6/user/matrix.c

@@ -0,0 +1,84 @@
+#include <ulib.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#define MATSIZE     10
+
+static int mata[MATSIZE][MATSIZE];
+static int matb[MATSIZE][MATSIZE];
+static int matc[MATSIZE][MATSIZE];
+
+void
+work(unsigned int times) {
+    int i, j, k, size = MATSIZE;
+    for (i = 0; i < size; i ++) {
+        for (j = 0; j < size; j ++) {
+            mata[i][j] = matb[i][j] = 1;
+        }
+    }
+
+    yield();
+
+    cprintf("pid %d is running (%d times)!.\n", getpid(), times);
+
+    while (times -- > 0) {
+        for (i = 0; i < size; i ++) {
+            for (j = 0; j < size; j ++) {
+                matc[i][j] = 0;
+                for (k = 0; k < size; k ++) {
+                    matc[i][j] += mata[i][k] * matb[k][j];
+                }
+            }
+        }
+        for (i = 0; i < size; i ++) {
+            for (j = 0; j < size; j ++) {
+                mata[i][j] = matb[i][j] = matc[i][j];
+            }
+        }
+    }
+    cprintf("pid %d done!.\n", getpid());
+    exit(0);
+}
+
+const int total = 21;
+
+int
+main(void) {
+    int pids[total];
+    memset(pids, 0, sizeof(pids));
+
+    int i;
+    for (i = 0; i < total; i ++) {
+        if ((pids[i] = fork()) == 0) {
+            srand(i * i);
+            int times = (((unsigned int)rand()) % total);
+            times = (times * times + 10) * 100;
+            work(times);
+        }
+        if (pids[i] < 0) {
+            goto failed;
+        }
+    }
+
+    cprintf("fork ok.\n");
+
+    for (i = 0; i < total; i ++) {
+        if (wait() != 0) {
+            cprintf("wait failed.\n");
+            goto failed;
+        }
+    }
+
+    cprintf("matrix pass.\n");
+    return 0;
+
+failed:
+    for (i = 0; i < total; i ++) {
+        if (pids[i] > 0) {
+            kill(pids[i]);
+        }
+    }
+    panic("FAIL: T.T\n");
+}
+