reorganize source

[com32] / src / kern / timer.h

diff --git a/src/kern/timer.h b/src/kern/timer.h
new file mode 100644 (file)
index 0000000..c057801
--- /dev/null
+++ b/src/kern/timer.h
@@ -0,0 +1,43 @@
+/*
+pcboot - bootable PC demo/game kernel
+Copyright (C) 2018-2023 John Tsiombikas <nuclear@member.fsf.org>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY, without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+#ifndef _TIMER_H_
+#define _TIMER_H_
+
+#include "config.h"
+
+#define MSEC_TO_TICKS(ms)      ((ms) * TICK_FREQ_HZ / 1000)
+#define TICKS_TO_MSEC(tk)      ((tk) * 1000 / TICK_FREQ_HZ)
+
+extern volatile unsigned long nticks;
+
+void init_timer(void);
+void cleanup_timer(void);
+
+/*
+int sys_sleep(int sec);
+void sleep(unsigned long msec);
+*/
+
+/* schedule a function to be called 'msec' milliseconds into the future
+ * warning: this function will be called directly from the timer interrupt, and
+ * must be extremely quick.
+ */
+void set_alarm(unsigned long msec, void (*func)(void));
+void cancel_alarm(void (*func)(void));
+
+#endif /* _TIMER_H_ */