Re: [Qemu-devel] [PATCH 04/13] qemu-timer: more clock functions

[Anthony Liguori]

On 10/11/2011 06:35 AM, Paolo Bonzini wrote:

These will be used when moving icount accounting to cpus.c.

Signed-off-by: Paolo Bonzini<pbonz...@redhat.com>

Reviewed-by: Anthony Liguori <aligu...@us.ibm.com>

Regards,

Anthony Liguori

---
  qemu-timer.c |   25 +++++++++++++++++++++++++
  qemu-timer.h |    3 +++
  2 files changed, 28 insertions(+), 0 deletions(-)

diff --git a/qemu-timer.c b/qemu-timer.c
index e2551f3..ebb5089 100644
--- a/qemu-timer.c
+++ b/qemu-timer.c
@@ -495,6 +495,31 @@ void qemu_clock_warp(QEMUClock *clock)
      }
  }

+int64_t qemu_clock_has_timers(QEMUClock *clock)
+{
+    return !!clock->active_timers;
+}
+
+int64_t qemu_clock_expired(QEMUClock *clock)
+{
+    return (clock->active_timers&&
+            clock->active_timers->expire_time<  qemu_get_clock_ns(clock));
+}
+
+int64_t qemu_clock_deadline(QEMUClock *clock)
+{
+    /* To avoid problems with overflow limit this to 2^32.  */
+    int64_t delta = INT32_MAX;
+
+    if (clock->active_timers) {
+        delta = clock->active_timers->expire_time - qemu_get_clock_ns(clock);
+    }
+    if (delta<  0) {
+        delta = 0;
+    }
+    return delta;
+}
+
  QEMUTimer *qemu_new_timer(QEMUClock *clock, int scale,
                            QEMUTimerCB *cb, void *opaque)
  {
diff --git a/qemu-timer.h b/qemu-timer.h
index 0a43469..4578075 100644
--- a/qemu-timer.h
+++ b/qemu-timer.h
@@ -38,6 +38,9 @@ extern QEMUClock *vm_clock;
  extern QEMUClock *host_clock;

  int64_t qemu_get_clock_ns(QEMUClock *clock);
+int64_t qemu_clock_has_timers(QEMUClock *clock);
+int64_t qemu_clock_expired(QEMUClock *clock);
+int64_t qemu_clock_deadline(QEMUClock *clock);
  void qemu_clock_enable(QEMUClock *clock, int enabled);
  void qemu_clock_warp(QEMUClock *clock);