aio / timers: Introduce new API timer_new and friends

Introduce new API for creating timers - timer_new and
_ns, _ms, _us derivatives.

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

include/qemu/timer.h

@@ -370,6 +370,24 @@ static inline QEMUTimer *timer_new_tl(QEMUTimerList *timer_list,
     return ts;
 }
 
+/**
+ * timer_new:
+ * @type: the clock type to use
+ * @scale: the scale value for the tiemr
+ * @cb: the callback to be called when the timer expires
+ * @opaque: the opaque pointer to be passed to the callback
+ *
+ * Creeate a new timer and associate it with the default
+ * timer list for the clock type @type.
+ *
+ * Returns: a pointer to the timer
+ */
+static inline QEMUTimer *timer_new(QEMUClockType type, int scale,
+                                   QEMUTimerCB *cb, void *opaque)
+{
+    return timer_new_tl(main_loop_tlg.tl[type], scale, cb, opaque);
+}
+
 void qemu_free_timer(QEMUTimer *ts);
 void qemu_del_timer(QEMUTimer *ts);
 void qemu_mod_timer_ns(QEMUTimer *ts, int64_t expire_time);
@@ -492,6 +510,23 @@ static inline QEMUTimer *qemu_new_timer_ns(QEMUClock *clock, QEMUTimerCB *cb,
     return qemu_new_timer(clock, SCALE_NS, cb, opaque);
 }
 
+/**
+ * timer_new_ns:
+ * @clock: the clock to associate with the timer
+ * @callback: the callback to call when the timer expires
+ * @opaque: the opaque pointer to pass to the callback
+ *
+ * Create a new timer with nanosecond scale on the default timer list
+ * associated with the clock.
+ *
+ * Returns: a pointer to the newly created timer
+ */
+static inline QEMUTimer *timer_new_ns(QEMUClockType type, QEMUTimerCB *cb,
+                                      void *opaque)
+{
+    return timer_new(type, SCALE_NS, cb, opaque);
+}
+
 /**
  * qemu_new_timer_us:
  * @clock: the clock to associate with the timer
@@ -510,6 +545,23 @@ static inline QEMUTimer *qemu_new_timer_us(QEMUClock *clock,
     return qemu_new_timer(clock, SCALE_US, cb, opaque);
 }
 
+/**
+ * timer_new_us:
+ * @clock: the clock to associate with the timer
+ * @callback: the callback to call when the timer expires
+ * @opaque: the opaque pointer to pass to the callback
+ *
+ * Create a new timer with microsecond scale on the default timer list
+ * associated with the clock.
+ *
+ * Returns: a pointer to the newly created timer
+ */
+static inline QEMUTimer *timer_new_us(QEMUClockType type, QEMUTimerCB *cb,
+                                      void *opaque)
+{
+    return timer_new(type, SCALE_US, cb, opaque);
+}
+
 /**
  * qemu_new_timer_ms:
  * @clock: the clock to associate with the timer
@@ -528,6 +580,23 @@ static inline QEMUTimer *qemu_new_timer_ms(QEMUClock *clock,
     return qemu_new_timer(clock, SCALE_MS, cb, opaque);
 }
 
+/**
+ * timer_new_ms:
+ * @clock: the clock to associate with the timer
+ * @callback: the callback to call when the timer expires
+ * @opaque: the opaque pointer to pass to the callback
+ *
+ * Create a new timer with millisecond scale on the default timer list
+ * associated with the clock.
+ *
+ * Returns: a pointer to the newly created timer
+ */
+static inline QEMUTimer *timer_new_ms(QEMUClockType type, QEMUTimerCB *cb,
+                                      void *opaque)
+{
+    return timer_new(type, SCALE_MS, cb, opaque);
+}
+
 static inline int64_t qemu_get_clock_ms(QEMUClock *clock)
 {
     return qemu_get_clock_ns(clock) / SCALE_MS;