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aio / timers: Add QEMUTimerListGroup and helper functions

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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>
This commit is contained in:
Alex Bligh 2013-08-21 16:02:48 +01:00 • committed by Stefan Hajnoczi
parent 6a1751b7aa
commit 754d6a544d
3 changed files with 92 additions and 0 deletions
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49
include/qemu/timer.h
View file

@ -53,6 +53,11 @@ typedef enum {
typedef struct QEMUClock QEMUClock;
typedef struct QEMUTimerList QEMUTimerList;
struct QEMUTimerListGroup {
QEMUTimerList *tl[QEMU_CLOCK_MAX];
};
typedef void QEMUTimerCB(void *opaque);
struct QEMUTimer {
@ -64,6 +69,7 @@ struct QEMUTimer {
int scale;
};
extern QEMUTimerListGroup main_loop_tlg;
extern QEMUClock *qemu_clocks[QEMU_CLOCK_MAX];
/**
@ -217,6 +223,49 @@ QEMUClock *timerlist_get_clock(QEMUTimerList *timer_list);
*/
bool timerlist_run_timers(QEMUTimerList *timer_list);
/**
* timerlistgroup_init:
* @tlg: the timer list group
*
* Initialise a timer list group. This must already be
* allocated in memory and zeroed.
*/
void timerlistgroup_init(QEMUTimerListGroup *tlg);
/**
* timerlistgroup_deinit:
* @tlg: the timer list group
*
* Deinitialise a timer list group. This must already be
* initialised. Note the memory is not freed.
*/
void timerlistgroup_deinit(QEMUTimerListGroup *tlg);
/**
* timerlistgroup_run_timers:
* @tlg: the timer list group
*
* Run the timers associated with a timer list group.
* This will run timers on multiple clocks.
*
* Returns: true if any timer callback ran
*/
bool timerlistgroup_run_timers(QEMUTimerListGroup *tlg);
/**
* timerlistgroup_deadline_ns
* @tlg: the timer list group
*
* Determine the deadline of the soonest timer to
* expire associated with any timer list linked to
* the timer list group. Only clocks suitable for
* deadline calculation are included.
*
* Returns: the deadline in nanoseconds or -1 if no
* timers are to expire.
*/
int64_t timerlistgroup_deadline_ns(QEMUTimerListGroup *tlg);
/**
* qemu_timeout_ns_to_ms:
* @ns: nanosecond timeout value

1
include/qemu/typedefs.h
View file

@ -4,6 +4,7 @@
/* A load of opaque types so that device init declarations don't have to
pull in all the real definitions. */
typedef struct QEMUTimer QEMUTimer;
typedef struct QEMUTimerListGroup QEMUTimerListGroup;
typedef struct QEMUFile QEMUFile;
typedef struct QEMUBH QEMUBH;