aio / timers: Add QEMUTimerListGroup and helper functions

Add QEMUTimerListGroup and helper functions, to represent
a QEMUTimerList associated with each clock. Add a default
QEMUTimerListGroup representing the default timer lists
which are not associated with any other object (e.g.
an AioContext as added by future patches).

Signed-off-by: Alex Bligh <alex@alex.org.uk>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

1 files changed, 42 insertions, 0 deletions

diff --git a/qemu-timer.c b/qemu-timer.c
index b045184c04..c5e456e0b1 100644
--- a/qemu-timer.c
+++ b/qemu-timer.c
@@ -59,6 +59,7 @@ struct QEMUClock {
     bool enabled;
 };
 
+QEMUTimerListGroup main_loop_tlg;
 QEMUClock *qemu_clocks[QEMU_CLOCK_MAX];
 
 /* A QEMUTimerList is a list of timers attached to a clock. More
@@ -564,6 +565,46 @@ bool qemu_run_timers(QEMUClock *clock)
     return timerlist_run_timers(clock->main_loop_timerlist);
 }
 
+void timerlistgroup_init(QEMUTimerListGroup *tlg)
+{
+    QEMUClockType type;
+    for (type = 0; type < QEMU_CLOCK_MAX; type++) {
+        tlg->tl[type] = timerlist_new(type);
+    }
+}
+
+void timerlistgroup_deinit(QEMUTimerListGroup *tlg)
+{
+    QEMUClockType type;
+    for (type = 0; type < QEMU_CLOCK_MAX; type++) {
+        timerlist_free(tlg->tl[type]);
+    }
+}
+
+bool timerlistgroup_run_timers(QEMUTimerListGroup *tlg)
+{
+    QEMUClockType type;
+    bool progress = false;
+    for (type = 0; type < QEMU_CLOCK_MAX; type++) {
+        progress |= timerlist_run_timers(tlg->tl[type]);
+    }
+    return progress;
+}
+
+int64_t timerlistgroup_deadline_ns(QEMUTimerListGroup *tlg)
+{
+    int64_t deadline = -1;
+    QEMUClockType type;
+    for (type = 0; type < QEMU_CLOCK_MAX; type++) {
+        if (qemu_clock_use_for_deadline(tlg->tl[type]->clock)) {
+            deadline = qemu_soonest_timeout(deadline,
+                                            timerlist_deadline_ns(
+                                                tlg->tl[type]));
+        }
+    }
+    return deadline;
+}
+
 int64_t qemu_get_clock_ns(QEMUClock *clock)
 {
     int64_t now, last;
@@ -605,6 +646,7 @@ void init_clocks(void)
     for (type = 0; type < QEMU_CLOCK_MAX; type++) {
         if (!qemu_clocks[type]) {
             qemu_clocks[type] = qemu_clock_new(type);
+            main_loop_tlg.tl[type] = qemu_clocks[type]->main_loop_timerlist;
         }
     }