kernel threads

kernel threads and preemptive multitasking

src/include/kernel/sched.h

@@ -5,18 +5,29 @@
 #include <arch/regs.h>
 #include <kernel/vfs.h>
 
+#define THREAD_PRIORITY_INTERRUPT 0
+#define THREAD_PRIORITY_KERNEL 1
+#define THREAD_PRIORITY_USER 2
+
 #define THREAD_STATE_WAITING 0
 #define THREAD_STATE_RUNNING 1
 #define THREAD_STATE_BLOCKED 2
 
+typedef unsigned long state_t;
+
 struct _proc_t;
 
 typedef struct _thread_t{
 	struct _thread_t* next;
+	struct _thread_t* prev;
 	struct _proc_t* proc;
 	arch_regs* regs;
-	size_t state;
+	state_t state;
 	void* kernelstack;
+	void* kernelstackbase;
+	size_t stacksize;
+	pid_t tid;
+	int priority;
 } thread_t;
 
 typedef struct _proc_t{
@@ -26,8 +37,19 @@ typedef struct _proc_t{
 	pid_t pid;
 	gid_t gid;
 	uid_t uid;
+	thread_t** threads;
+	size_t threadcount;
 	dirnode_t* root;
 	dirnode_t* cwd;
 } proc_t;
 
+
+typedef struct{
+	thread_t* start;
+	thread_t* end;
+	int lock;
+} sched_queue;
+
+void sched_init();
+
 #endif