diff mbox

[RFC,04/14] qemu-timer: more clock functions

Message ID 1316185750-9187-5-git-send-email-pbonzini@redhat.com
State New
Headers show

Commit Message

Paolo Bonzini Sept. 16, 2011, 3:09 p.m. UTC 
These will be used when moving icount accounting to cpus.c.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 qemu-timer.c |   25 +++++++++++++++++++++++++
 qemu-timer.h |    3 +++
 2 files changed, 28 insertions(+), 0 deletions(-)
diff mbox

Patch

diff --git a/qemu-timer.c b/qemu-timer.c
index 548b349..f665000 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);