Diff: timer-unix-c.h

Revision:

0:73b89fc74e9f

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/timer-unix-c.h	Sun Jul 24 17:15:42 2011 +0000
@@ -0,0 +1,41 @@
+/* Opus Una - A Small Cooperative Multitasking Kernel in C
+ *
+ * Copyright (C) 2011 by Ivo van Poorten <ivop@euronet.nl>
+ * This file is licensed under the terms of the GNU Lesser
+ * General Public License, version 3.
+ */
+
+/* Run the kernel as a process on Unix */
+
+#include "timer.h"
+#include "kernel.h"
+
+#include <sys/time.h>
+#include <signal.h>
+#include <string.h>
+#include <unistd.h>
+
+static void timer_sr(int x) {
+    ou_ticks++;
+    ou_update_tasks();
+}
+
+void ou_start_timer(void) {
+    struct itimerval val;
+    struct sigaction act;
+
+    memset(&act, 0, sizeof(act));
+
+    act.sa_handler = timer_sr;
+    sigaction(SIGALRM, &act, NULL);     // signal() is not portable
+
+    val.it_interval.tv_usec = 10000;    // 10ms
+    val.it_interval.tv_sec = 0;
+    val.it_value.tv_usec = 10000;       // 10ms
+    val.it_value.tv_sec = 0; 
+    setitimer(ITIMER_REAL, &val, NULL);
+}
+
+void ou_idle(void) {
+    usleep(5);                  // save power/cpu time/et cetera...
+}