From: Ben Gras <ben@minix3.org>
Date: Fri, 17 Jun 2005 13:49:56 +0000 (+0000)
Subject: Part of fs timers library, forgot to add this in previous commit.
X-Git-Tag: v3.1.0~732
X-Git-Url: http://zhaoyanbai.com/repos/%22http:/www.isc.org/icons/man.named.html?a=commitdiff_plain;h=5954c7e30399f92c9adf05a56b535b9f375281b7;p=minix.git

Part of fs timers library, forgot to add this in previous commit.
---

diff --git a/servers/fs/timers.c b/servers/fs/timers.c
new file mode 100644
index 000000000..d3a9b3675
--- /dev/null
+++ b/servers/fs/timers.c
@@ -0,0 +1,75 @@
+/* FS timers library
+ */
+
+#include "fs.h"
+#include "fs_timers.h"
+
+#define VERBOSE 1
+
+#include <timers.h>
+#include <minix/syslib.h>
+#include <minix/com.h>
+
+PRIVATE timer_t *fs_timers = NULL;
+
+PUBLIC void fs_set_timer(timer_t *tp, int ticks, tmr_func_t watchdog, int arg)
+{
+	int r;
+	clock_t now, old_head = 0, new_head;
+
+	if((r = sys_getuptime(&now)) != OK)
+		panic(__FILE__, "FS couldn't get uptime from system task.", NO_NUM);
+
+	tmr_inittimer(tp);
+	tmr_arg(tp)->ta_int = arg;
+
+	old_head = tmrs_settimer(&fs_timers, tp, now+ticks, watchdog, &new_head);
+
+	/* reschedule our synchronous alarm if necessary */
+	if(!old_head || old_head > new_head) {
+		if(sys_syncalrm(SELF, new_head, 1) != OK)
+			panic(__FILE__, "FS set timer couldn't set synchronous alarm.", NO_NUM);
+#if VERBOSE
+		else
+			printf("timers: after setting, set synalarm to %d -> %d\n", old_head, new_head);
+#endif
+	}
+
+	return;
+}
+
+PUBLIC void fs_expire_timers(clock_t now)
+{
+	clock_t new_head;
+	tmrs_exptimers(&fs_timers, now, &new_head);
+	if(new_head > 0) {
+		if(sys_syncalrm(SELF, new_head, 1) != OK)
+			panic(__FILE__, "FS expire timer couldn't set synchronous alarm.", NO_NUM);
+		else
+#if VERBOSE
+			printf("timers: after expiry, set synalarm to %d\n", new_head);
+#endif
+	}
+#if VERBOSE
+	 else printf("after expiry, no new timer set\n");
+#endif
+}
+
+PUBLIC void fs_cancel_timer(timer_t *tp)
+{
+	clock_t new_head, old_head;
+	old_head = tmrs_clrtimer(&fs_timers, tp, &new_head);
+
+	/* if the earliest timer has been removed, we have to set
+	 * the synalarm to the next timer, or cancel the synalarm
+	 * altogether if th last time has been cancelled (new_head
+	 * will be 0 then).
+	 */
+	if(old_head < new_head || !new_head) {
+		if(sys_syncalrm(SELF, new_head, 1) != OK)
+			panic(__FILE__, "FS expire timer couldn't set synchronous alarm.", NO_NUM);
+#if VERBOSE
+		printf("timers: after cancelling, set synalarm to %d -> %d\n", old_head, new_head);
+#endif
+	}
+}