Changeset 669 for trunk/kernel/kern/core.c

Timestamp:

Nov 19, 2020, 11:44:34 PM (4 years ago)

Author:

alain

Message:

1) Introduce up to 4 command lines arguments in the KSH "load" command.
These arguments are transfered to the user process through the
argc/argv mechanism, using the user space "args" vseg.

2) Introduce the named and anonymous "pipes", for inter-process communication
through the pipe() and mkfifo() syscalls.

3) Introduce the "chat" application to validate the two above mechanisms.

4) Improve printk() and assert() fonctions in printk.c.

File:

• trunk/kernel/kern/core.c (modified) (4 diffs)

trunk/kernel/kern/core.c

@@ -26 +26 @@
 #include <hal_kernel_types.h>
 #include <hal_special.h>
-#include <errno.h>
 #include <printk.h>
 #include <thread.h>
 #include <chdev.h>
+#include <alarm.h>
 #include <dev_pic.h>
 #include <rpc.h>
 #include <cluster.h>
 #include <kmem.h>
-#include <dqdt.h>
 #include <core.h>
 
@@ -52 +51 @@
         core->rand_last         = hal_time_stamp() & 0xFFF;
 
-    // initialize scheduler
+    // initialize the scheduler
         sched_init( core );
+
+    // initialise the alarms lock
+    busylock_init( &core->alarms_lock , LOCK_CORE_ALARMS );
+
+    // initialise the alarms list 
+    list_root_init( &core->alarms_root );
 }
+
+///////////////////////////////////////
+void core_check_alarms( core_t * core )
+{
+    alarm_handler_t * handler;
+
+    // get pointer on root of alarms list
+    list_entry_t * root = &core->alarms_root;
+
+    // does nothing if list is empty
+    if( list_is_empty( root ) ) return;
+
+    // get pointer on first alarm when list non empty
+    alarm_t * alarm = LIST_FIRST( root , alarm_t , list );
+
+    // get first alarm date
+    cycle_t alarm_date = alarm->date; 
+
+    // get current date
+    cycle_t current_date = hal_get_cycles();
+
+    if( current_date >= alarm_date )
+    {
+        // get pointer on registered alarm handler
+        handler = (alarm_handler_t *)alarm->func_ptr;
+
+        // call alarm handler
+        handler( alarm->args_xp );
+    }
+}   // end core_check_alarms()
 
 //////////////////////
@@ -73 +108 @@
     }
 
-    assert( false , "core not found" );
+    assert( __FUNCTION__, false , "core not found" );
+
+    return 0;
 }
 
@@ -104 +141 @@
         // handle scheduler
         if( (ticks % CONFIG_SCHED_TICKS_PER_QUANTUM) == 0 ) sched_yield( "TICK");
+
+    // handle alarms
+    core_check_alarms( core );
 }