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aio / timers: Add documentation and new format calls 

Add documentation for existing qemu timer calls. Add new format
calls of the format timer_XXX rather than qemu_XXX_timer
for consistency.

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 16:02:58 +01:00 committed by Stefan Hajnoczi
parent ac70aafc28
commit 54904d2a91
1 changed files with 187 additions and 25 deletions
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212
include/qemu/timer.h
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@ -93,8 +93,52 @@ static inline QEMUClock *qemu_clock_ptr(QEMUClockType type)
#define vm_clock (qemu_clock_ptr(QEMU_CLOCK_VIRTUAL))
#define host_clock (qemu_clock_ptr(QEMU_CLOCK_HOST))
/**
* qemu_get_clock_ns:
* @clock: the clock to operate on
*
* Get the nanosecond value of a clock
*
* Returns: the clock value in nanoseconds
*/
int64_t qemu_get_clock_ns(QEMUClock *clock);
/**
* qemu_clock_get_ns;
* @type: the clock type
*
* Get the nanosecond value of a clock with
* type @type
*
* Returns: the clock value in nanoseconds
*/
static inline int64_t qemu_clock_get_ns(QEMUClockType type)
{
return qemu_get_clock_ns(qemu_clock_ptr(type));
}
/**
* qemu_clock_has_timers:
* @clock: the clock to operate on
*
* Determines whether a clock's default timer list
* has timers attached
*
* Returns: true if the clock's default timer list
* has timers attached
*/
bool qemu_clock_has_timers(QEMUClock *clock);
/**
* qemu_clock_expired:
* @clock: the clock to operate on
*
* Determines whether a clock's default timer list
* has an expired clock.
*
* Returns: true if the clock's default timer list has
* an expired timer
*/
bool qemu_clock_expired(QEMUClock *clock);
int64_t qemu_clock_deadline(QEMUClock *clock);
@ -294,7 +338,7 @@ void timerlistgroup_deinit(QEMUTimerListGroup *tlg);
bool timerlistgroup_run_timers(QEMUTimerListGroup *tlg);
/**
* timerlistgroup_deadline_ns
* timerlistgroup_deadline_ns:
* @tlg: the timer list group
*
* Determine the deadline of the soonest timer to
@ -330,13 +374,57 @@ int qemu_timeout_ns_to_ms(int64_t ns);
* Returns: number of fds ready
*/
int qemu_poll_ns(GPollFD *fds, guint nfds, int64_t timeout);
/**
* qemu_clock_enable:
* @clock: the clock to operate on
* @enabled: true to enable, false to disable
*
* Enable or disable a clock
*/
void qemu_clock_enable(QEMUClock *clock, bool enabled);
/**
* qemu_clock_warp:
* @clock: the clock to operate on
*
* Warp a clock to a new value
*/
void qemu_clock_warp(QEMUClock *clock);
/**
* qemu_register_clock_reset_notifier:
* @clock: the clock to operate on
* @notifier: the notifier function
*
* Register a notifier function to call when the clock
* concerned is reset.
*/
void qemu_register_clock_reset_notifier(QEMUClock *clock, Notifier *notifier);
/**
* qemu_unregister_clock_reset_notifier:
* @clock: the clock to operate on
* @notifier: the notifier function
*
* Unregister a notifier function to call when the clock
* concerned is reset.
*/
void qemu_unregister_clock_reset_notifier(QEMUClock *clock,
Notifier *notifier);
/**
* qemu_new_timer:
* @clock: the clock to operate on
* @scale: the scale of the clock
* @cb: the callback function to call when the timer expires
* @opaque: an opaque pointer to pass to the callback
*
* Produce a new timer attached to clock @clock. This is a legacy
* function. Use timer_new instead.
*
* Returns: a pointer to the new timer allocated.
*/
QEMUTimer *qemu_new_timer(QEMUClock *clock, int scale,
QEMUTimerCB *cb, void *opaque);
@ -401,21 +489,21 @@ static inline QEMUTimer *timer_new(QEMUClockType type, int scale,
return timer_new_tl(main_loop_tlg.tl[type], scale, cb, opaque);
}
/**
* qemu_free_timer:
* @ts: the timer to operate on
*
* free the timer @ts. @ts must not be active.
*
* This is a legacy function. Use timer_free instead.
*/
void qemu_free_timer(QEMUTimer *ts);
void qemu_del_timer(QEMUTimer *ts);
void qemu_mod_timer_ns(QEMUTimer *ts, int64_t expire_time);
void qemu_mod_timer(QEMUTimer *ts, int64_t expire_time);
bool timer_pending(QEMUTimer *ts);
bool timer_expired(QEMUTimer *timer_head, int64_t current_time);
uint64_t timer_expire_time_ns(QEMUTimer *ts);
/* New format calling conventions for timers */
/**
* timer_free:
* @ts: the timer
* @ts: the timer to operate on
*
* Free a timer (it must not be on the active list)
* free the timer @ts. @ts must not be active.
*/
static inline void timer_free(QEMUTimer *ts)
{
@ -423,10 +511,22 @@ static inline void timer_free(QEMUTimer *ts)
}
/**
* timer_del:
* @ts: the timer
* qemu_del_timer:
* @ts: the timer to operate on
*
* Delete a timer from the active list.
* Delete a timer. This makes it inactive. It does not free
* memory.
*
* This is a legacy function. Use timer_del instead.
*/
void qemu_del_timer(QEMUTimer *ts);
/**
* timer_del:
* @ts: the timer to operate on
*
* Delete a timer. This makes it inactive. It does not free
* memory.
*/
static inline void timer_del(QEMUTimer *ts)
{
@ -434,11 +534,24 @@ static inline void timer_del(QEMUTimer *ts)
}
/**
* timer_mod_ns:
* @ts: the timer
* qemu_mod_timer_ns:
* @ts: the timer to operate on
* @expire_time: the expiry time in nanoseconds
*
* Modify a timer to expire at @expire_time
* Modify a timer such that the expiry time is @expire_time
* as measured in nanoseconds
*
* This is a legacy function. Use timer_mod_ns.
*/
void qemu_mod_timer_ns(QEMUTimer *ts, int64_t expire_time);
/**
* timer_mod_ns:
* @ts: the timer to operate on
* @expire_time: the expiry time in nanoseconds
*
* Modify a timer such that the expiry time is @expire_time
* as measured in nanoseconds
*/
static inline void timer_mod_ns(QEMUTimer *ts, int64_t expire_time)
{
@ -446,18 +559,61 @@ static inline void timer_mod_ns(QEMUTimer *ts, int64_t expire_time)
}
/**
* timer_mod:
* @ts: the timer
* @expire_time: the expire time in the units associated with the timer
* qemu_mod_timer:
* @ts: the timer to operate on
* @expire_time: the expiry time
*
* Modify a timer to expiry at @expire_time, taking into
* account the scale associated with the timer.
* Modify a timer such that the expiry time is @expire_time
* as measured in the timer's scale
*
* This is a legacy function. Use timer_mod.
*/
static inline void timer_mod(QEMUTimer *ts, int64_t expire_timer)
void qemu_mod_timer(QEMUTimer *ts, int64_t expire_time);
/**
* timer_mod:
* @ts: the timer to operate on
* @expire_time: the expiry time in nanoseconds
*
* Modify a timer such that the expiry time is @expire_time
* as measured in the timer's scale
*/
static inline void timer_mod(QEMUTimer *ts, int64_t expire_time)
{
qemu_mod_timer(ts, expire_timer);
qemu_mod_timer(ts, expire_time);
}
/**
* timer_pending:
* @ts: the timer to operate on
*
* Determines whether a timer is pending (i.e. is on the
* active list of timers, whether or not it has not yet expired).
*
* Returns: true if the timer is pending
*/
bool timer_pending(QEMUTimer *ts);
/**
* timer_expired:
* @ts: the timer to operate on
*
* Determines whether a timer has expired.
*
* Returns: true if the timer has expired
*/
bool timer_expired(QEMUTimer *timer_head, int64_t current_time);
/**
* timer_expire_time_ns:
* @ts: the timer to operate on
*
* Determines the time until a timer expires
*
* Returns: the time (in nanoseonds) until a timer expires
*/
uint64_t timer_expire_time_ns(QEMUTimer *ts);
/**
* qemu_run_timers:
* @clock: clock on which to operate
@ -480,9 +636,15 @@ bool qemu_run_timers(QEMUClock *clock);
bool qemu_run_all_timers(void);
void configure_alarms(char const *opt);
void init_clocks(void);
int init_timer_alarm(void);
/**
* initclocks:
*
* Initialise the clock & timer infrastructure
*/
void init_clocks(void);
int64_t cpu_get_ticks(void);
void cpu_enable_ticks(void);
void cpu_disable_ticks(void);