*
* \brief Internal scheduler structures and definitions for processes.
*
- * \version $Id$
* \author Bernie Innocenti <bernie@codewiz.org>
*/
#include <kern/proc.h> // struct Process
+#ifndef asm_switch_context
/**
* CPU dependent context switching routines.
*
* 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);
-
-/*
- * Save context of old process and switch to new process.
- */
-INLINE void proc_switchTo(Process *next, Process *prev)
-{
- cpu_stack_t *dummy;
-
- if (UNLIKELY(next == prev))
- return;
- /*
- * If there is no old process, we save the old stack pointer into a
- * dummy variable that we ignore. In fact, this happens only when the
- * old process has just exited.
- */
- asm_switch_context(&next->stack, prev ? &prev->stack : &dummy);
-}
+#endif
/**
* \name Flags for Process.flags.
extern REGISTER List proc_ready_list;
#if CONFIG_KERN_PRI
+# if CONFIG_KERN_PRI_INHERIT
+ #define __prio_orig(proc) (proc->orig_pri)
+ #define __prio_inh(proc) (LIST_EMPTY(&(proc)->inh_list) ? INT_MIN : \
+ ((PriNode *)LIST_HEAD(&proc->inh_list))->pri)
+ #define __prio_proc(proc) (__prio_inh(proc) > __prio_orig(proc) ? \
+ __prio_inh(proc) : __prio_orig(proc))
+# endif
#define prio_next() (LIST_EMPTY(&proc_ready_list) ? INT_MIN : \
((PriNode *)LIST_HEAD(&proc_ready_list))->pri)
#define prio_proc(proc) (proc->link.pri)
/* Schedule another process *without* adding the current one to the ready list. */
void proc_switch(void);
-/* Low level scheduling routine. */
-void proc_schedule(void);
-
-/* Low level context switch routine. */
-void proc_switchTo(Process *next, Process *prev);
+/* 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 */
+/*
+ * Quantum related macros are used in the
+ * timer module and must be empty when
+ * kernel is disabled.
+ */
+#if (CONFIG_KERN && 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 && CONFIG_KERN_PREEMPT) */
+INLINE int preempt_quantum(void)
+{
+ return 0;
+}
+
+INLINE void proc_decQuantum(void)
+{
+}
+
+INLINE void preempt_reset_quantum(void)
+{
+}
+#endif /* (CONFIG_KERN && CONFIG_KERN_PREEMPT) */
+
#endif /* KERN_PROC_P_H */