X-Git-Url: https://codewiz.org/gitweb?a=blobdiff_plain;f=bertos%2Fkern%2Fproc_p.h;h=975f9b8a0b0e5620da3935868795b35b5170efaf;hb=9576112627e2ebe86078648f296445a570c5aa77;hp=27d65fe288193a3a78aa579c370fbb43273f1586;hpb=d9d931610bca1df6ceb9227eacc9ff2c7f89b77a;p=bertos.git

diff --git a/bertos/kern/proc_p.h b/bertos/kern/proc_p.h
index 27d65fe2..975f9b8a 100644
--- a/bertos/kern/proc_p.h
+++ b/bertos/kern/proc_p.h
@@ -33,7 +33,6 @@
  *
  * \brief Internal scheduler structures and definitions for processes.
  *
- * \version $Id$
  * \author Bernie Innocenti <bernie@codewiz.org>
  */
 
@@ -50,6 +49,15 @@
 
 #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.
@@ -72,7 +80,8 @@ extern REGISTER List     proc_ready_list;
 #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)
@@ -80,6 +89,7 @@ extern REGISTER List     proc_ready_list;
 			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)
@@ -150,8 +160,8 @@ void proc_entry(void);
 /* 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);
@@ -170,4 +180,43 @@ 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 */