#include <kern/proc.h> // struct Process
+#ifndef asm_switch_context
+/**
+ * CPU dependent context switching routines.
+ *
+ * Saving and restoring the context on the stack is done by a CPU-dependent
+ * support routine which usually needs to be written in assembly.
+ */
+EXTERN_C void asm_switch_context(cpu_stack_t **new_sp, cpu_stack_t **save_sp);
+#endif
/**
* \name Flags for Process.flags.
#if CONFIG_KERN_PRI
#define prio_next() (LIST_EMPTY(&proc_ready_list) ? INT_MIN : \
((PriNode *)LIST_HEAD(&proc_ready_list))->pri)
- #define prio_curr() (current_process->link.pri)
+ #define prio_proc(proc) (proc->link.pri)
+ #define prio_curr() prio_proc(current_process)
#define SCHED_ENQUEUE_INTERNAL(proc) \
LIST_ENQUEUE(&proc_ready_list, &(proc)->link)
LIST_ENQUEUE_HEAD(&proc_ready_list, &(proc)->link)
#else
#define prio_next() 0
+ #define prio_proc(proc) 0
#define prio_curr() 0
#define SCHED_ENQUEUE_INTERNAL(proc) ADDTAIL(&proc_ready_list, &(proc)->link)
/* Schedule another process *without* adding the current one to the ready list. */
void proc_switch(void);
-/* Low level scheduling routine. */
-void proc_schedule(void);
+/* Immediately schedule a particular process bypassing the scheduler. */
+void proc_wakeup(Process *proc);
/* Initialize a scheduler class. */
void proc_schedInit(void);
void monitor_rename(Process *proc, const char *name);
#endif /* CONFIG_KERN_MONITOR */
+#if CONFIG_KERN_PREEMPT
+INLINE int preempt_quantum(void)
+{
+ extern int _proc_quantum;
+ return _proc_quantum;
+}
+
+INLINE void proc_decQuantum(void)
+{
+ extern int _proc_quantum;
+ if (_proc_quantum > 0)
+ _proc_quantum--;
+}
+
+INLINE void preempt_reset_quantum(void)
+{
+ extern int _proc_quantum;
+ _proc_quantum = CONFIG_KERN_QUANTUM;
+}
+#else /* !CONFIG_KERN_PREEMPT */
+INLINE int preempt_quantum(void)
+{
+ return 0;
+}
+
+INLINE void proc_decQuantum(void)
+{
+}
+
+INLINE void preempt_reset_quantum(void)
+{
+}
+#endif /* CONFIG_KERN_PREEMPT */
+
#endif /* KERN_PROC_P_H */