CONFIG_KERN_PREEMPTIVE -> CONFIG_KERN_PREEMPT

[bertos.git] / bertos / kern / proc_p.h

diff --git a/bertos/kern/proc_p.h b/bertos/kern/proc_p.h
index 7dad780d4fb03098ce3f388afcee3750acec50bb..f31fc621ff8461416e725722bc531afa221a7f29 100644 (file)
--- a/bertos/kern/proc_p.h
+++ b/bertos/kern/proc_p.h
@@ -34,7 +34,6 @@
  * \brief Internal scheduler structures and definitions for processes.
  *
  * \version $Id$
- *
  * \author Bernie Innocenti <bernie@codewiz.org>
  */
 
@@ -46,11 +45,19 @@
 
 #include <cpu/types.h>        /* for cpu_stack_t */
 
-#include <mware/list.h>
+#include <struct/list.h>
+
+#if CONFIG_KERN_PREEMPT
+       #include <ucontext.h> // XXX
+#endif
 
 typedef struct Process
 {
+#if CONFIG_KERN_PRI
+       PriNode      link;        /**< Link Process into scheduler lists */
+#else
        Node         link;        /**< Link Process into scheduler lists */
+#endif
        cpustack_t  *stack;       /**< Per-process SP */
        iptr_t       user_data;   /**< Custom data passed to the process */
 
@@ -59,10 +66,6 @@ typedef struct Process
        sigmask_t    sig_recv;    /**< Received signals */
 #endif
 
-#if CONFIG_KERN_PREEMPTIVE
-       int          forbid_cnt;  /**< Nesting count for proc_forbid()/proc_permit(). */
-#endif
-
 #if CONFIG_KERN_HEAP
        uint16_t     flags;       /**< Flags */
 #endif
@@ -72,6 +75,10 @@ typedef struct Process
        size_t       stack_size;  /**< Size of process stack */
 #endif
 
+#if CONFIG_KERN_PREEMPT
+       ucontext_t   context;
+#endif
+
 #if CONFIG_KERN_MONITOR
        struct ProcMonitor
        {
@@ -94,16 +101,46 @@ typedef struct Process
 /** Track running processes. */
 extern REGISTER Process        *CurrentProcess;
 
-/** Track ready processes. */
+/**
+ * Track ready processes.
+ *
+ * Access to this list must be protected with a proc_forbid() / proc_premit()
+ * pair, or with SCHED_ATOMIC()
+ */
 extern REGISTER List     ProcReadyList;
 
-
-/** Enqueue a task in the ready list. */
-#define SCHED_ENQUEUE(proc)  ADDTAIL(&ProcReadyList, &(proc)->link)
+#if CONFIG_KERN_PRI
+       /**
+        * Enqueue a task in the ready list.
+        *
+        * Always use this macro to instert a process in the ready list, as its
+        * might vary to implement a different scheduling algorithms.
+        *
+        * \note This macro is *NOT* protected against the scheduler.  Access to
+        *       this list must be performed with interrupts disabled.
+        */
+       #define SCHED_ENQUEUE(proc)  do { \
+                       LIST_ASSERT_VALID(&ProcReadyList); \
+                       LIST_ENQUEUE(&ProcReadyList, &(proc)->link); \
+               } while (0)
+
+#else // !CONFIG_KERN_PRI
+
+       #define SCHED_ENQUEUE(proc)  do { \
+                       LIST_ASSERT_VALID(&ProcReadyList); \
+                       ADDTAIL(&ProcReadyList, &(proc)->link); \
+               } while (0)
+
+#endif // !CONFIG_KERN_PRI
 
 /** Schedule to another process *without* adding the current to the ready list. */
 void proc_schedule(void);
 
+#if CONFIG_KERN_PREEMPT
+void proc_entry(void (*user_entry)(void));
+void preempt_init(void);
+#endif
+
 #if CONFIG_KERN_MONITOR
        /** Initialize the monitor */
        void monitor_init(void);
@@ -119,4 +156,3 @@ void proc_schedule(void);
 #endif /* CONFIG_KERN_MONITOR */
 
 #endif /* KERN_PROC_P_H */
-