[feat] Simple Multitask

kernel/main.cpp

@@ -6,6 +6,7 @@
 #include <common.h>
 #include <memory/pmm.h>
 #include <memory/heap.h>
+#include <scheduler.h>
 #include <fs.h>
 
 extern EFI_SYSTEM_TABLE *ST;
@@ -105,7 +106,40 @@ extern "C" void kernel_main() {
     }
 
     pf_print("Welcome to Sylva OS!\n");
-    serial_write(" Kernel prepared well, start loop.\n");
+    serial_write(" Kernel prepared well.\n");
 
-    while (1) ASM ("hlt"); // 《30天》看多了 (doge
+    // --- Multitasking demo ---
+    serial_write("Sylva: creating tasks...\n");
+
+    // Task A: prints a message 3 times, yielding between each
+    task_create("taskA", []() {
+        for (int i = 0; i < 3; i++) {
+            serial_write("[taskA] running iteration ");
+            serial_write_hex(i);
+            serial_write("\n");
+            yield();
+        }
+        serial_write("[taskA] done\n");
+    });
+
+    // Task B: prints a message 5 times
+    task_create("taskB", []() {
+        for (int i = 0; i < 5; i++) {
+            serial_write("[taskB] hello from taskB #");
+            serial_write_hex(i);
+            serial_write("\n");
+            yield();
+        }
+        serial_write("[taskB] done\n");
+    });
+
+    // Task C: short task
+    task_create("taskC", []() {
+        serial_write("[taskC] quick task\n");
+        yield();
+        serial_write("[taskC] finished\n");
+    });
+
+    serial_write("Sylva: starting scheduler\n");
+    scheduler_run();  // never returns
 }