[Qemu-devel] [PATCH RFC V1 02/11] qemu-timer: Introduce qemu_run_one_timer

[Anthony PERARD <anthony.perard@citrix.com>]

Used by the Xen PCI Passthrough code to run the timer about the power
state transition.

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
---
 qemu-timer.c |   15 +++++++++++++++
 qemu-timer.h |    3 +++
 2 files changed, 18 insertions(+), 0 deletions(-)

diff --git a/qemu-timer.c b/qemu-timer.c
index 46dd483..15e659b 100644
--- a/qemu-timer.c
+++ b/qemu-timer.c
@@ -1163,3 +1163,18 @@ int qemu_calculate_timeout(void)
     return 1000;
 }
 
+/* run the specified timer */
+void qemu_run_one_timer(QEMUTimer *ts)
+{
+    uint64_t current_time;
+
+    /* remove timer from the list before calling the callback */
+    qemu_del_timer(ts);
+
+    while ((current_time = qemu_get_clock_ms(rt_clock)) < ts->expire_time)
+        /* sleep until the expire time */
+        usleep((ts->expire_time - current_time) * 1000);
+
+    /* run the callback */
+    ts->cb(ts->opaque);
+}
diff --git a/qemu-timer.h b/qemu-timer.h
index 0a43469..b7b907b 100644
--- a/qemu-timer.h
+++ b/qemu-timer.h
@@ -338,4 +338,7 @@ extern int64_t tlb_flush_time;
 extern int64_t dev_time;
 #endif
 
+/* run the specified timer */
+void qemu_run_one_timer(QEMUTimer *ts);
+
 #endif
-- 
Anthony PERARD