kernel: sched: implement the round-robin scheduler

Implement a basic round-robin scheduler and tie it to the PIT timer
interrupt on x86.

Signed-off-by: Danny Holman <dholman@gymli.org>

1 files changed, 10 insertions, 17 deletions

diff --git a/include/kernel/sched.h b/include/kernel/sched.h
index fef36b8..00a5d95 100644
--- a/include/kernel/sched.h
+++ b/include/kernel/sched.h
@@ -2,26 +2,19 @@
 #define KERNEL_SCHED_H
 
 #include <kernel/asm.h>
-#include <kernel/data/list.h>
-
-#define THREAD_READY    0
-#define THREAD_RUNNING  1
-#define THREAD_WAIT     2
-
-struct task_block {
-        unsigned int pid;
-        unsigned int parent_pid;
-        int nice;
-        unsigned int num_threads;
-        struct thread_block *threads;
-        struct list_head list;
-};
+#include <kernel/kthread.h>
+#include <stdint.h>
 
 void sched_init(void);
 void schedule_next(void);
+void schedule_thread(struct kthread *thread);
+
+void block_thread(struct kthread *thread);
+void unblock_thread(struct kthread *thread);
+
+void sched_lock(void);
+void sched_unlock(void);
 
-struct task_block* init_task(int nice, unsigned int ppid);
-void schedule_thread(struct thread_block *thread);
-void switch_thread(struct thread_block *old, struct thread_block *new);
+void switch_thread(struct kthread *old, struct kthread *new);
 
 #endif