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qemu-timer: introduce timer attributes

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Attributes are simple flags, associated with individual timers for their
whole lifetime.  They intended to be used to mark individual timers for
special handling when they fire.

New/init functions family in timer interface updated and refactored (new
'attribute' argument added, timer_list replaced with timer_list_group+type
combinations, comments improved to avoid info duplication).  Also existing
aio interface extended with attribute-enabled variants of functions,
which create/initialize timers.

Signed-off-by: Artem Pisarenko <artem.k.pisarenko@gmail.com>
Message-Id: <f47b81dbce734e9806f9516eba8ca588e6321c2f.1539764043.git.artem.k.pisarenko@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Artem Pisarenko 2018-10-17 14:24:19 +06:00 • committed by Paolo Bonzini
parent 05ff8dc32f
commit 89a603a0c8
4 changed files with 124 additions and 70 deletions
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59
include/block/aio.h
View file

@ -387,6 +387,32 @@ struct LinuxAioState *aio_setup_linux_aio(AioContext *ctx, Error **errp);
/* Return the LinuxAioState bound to this AioContext */
struct LinuxAioState *aio_get_linux_aio(AioContext *ctx);
/**
* aio_timer_new_with_attrs:
* @ctx: the aio context
* @type: the clock type
* @scale: the scale
* @attributes: 0, or one to multiple OR'ed QEMU_TIMER_ATTR_<id> values
* to assign
* @cb: the callback to call on timer expiry
* @opaque: the opaque pointer to pass to the callback
*
* Allocate a new timer (with attributes) attached to the context @ctx.
* The function is responsible for memory allocation.
*
* The preferred interface is aio_timer_init or aio_timer_init_with_attrs.
* Use that unless you really need dynamic memory allocation.
*
* Returns: a pointer to the new timer
*/
static inline QEMUTimer *aio_timer_new_with_attrs(AioContext *ctx,
QEMUClockType type,
int scale, int attributes,
QEMUTimerCB *cb, void *opaque)
{
return timer_new_full(&ctx->tlg, type, scale, attributes, cb, opaque);
}
/**
* aio_timer_new:
* @ctx: the aio context
@ -396,10 +422,7 @@ struct LinuxAioState *aio_get_linux_aio(AioContext *ctx);
* @opaque: the opaque pointer to pass to the callback
*
* Allocate a new timer attached to the context @ctx.
* The function is responsible for memory allocation.
*
* The preferred interface is aio_timer_init. Use that
* unless you really need dynamic memory allocation.
* See aio_timer_new_with_attrs for details.
*
* Returns: a pointer to the new timer
*/
@ -407,7 +430,29 @@ static inline QEMUTimer *aio_timer_new(AioContext *ctx, QEMUClockType type,
int scale,
QEMUTimerCB *cb, void *opaque)
{
return timer_new_tl(ctx->tlg.tl[type], scale, cb, opaque);
return timer_new_full(&ctx->tlg, type, scale, 0, cb, opaque);
}
/**
* aio_timer_init_with_attrs:
* @ctx: the aio context
* @ts: the timer
* @type: the clock type
* @scale: the scale
* @attributes: 0, or one to multiple OR'ed QEMU_TIMER_ATTR_<id> values
* to assign
* @cb: the callback to call on timer expiry
* @opaque: the opaque pointer to pass to the callback
*
* Initialise a new timer (with attributes) attached to the context @ctx.
* The caller is responsible for memory allocation.
*/
static inline void aio_timer_init_with_attrs(AioContext *ctx,
QEMUTimer *ts, QEMUClockType type,
int scale, int attributes,
QEMUTimerCB *cb, void *opaque)
{
timer_init_full(ts, &ctx->tlg, type, scale, attributes, cb, opaque);
}
/**
@ -420,14 +465,14 @@ static inline QEMUTimer *aio_timer_new(AioContext *ctx, QEMUClockType type,
* @opaque: the opaque pointer to pass to the callback
*
* Initialise a new timer attached to the context @ctx.
* The caller is responsible for memory allocation.
* See aio_timer_init_with_attrs for details.
*/
static inline void aio_timer_init(AioContext *ctx,
QEMUTimer *ts, QEMUClockType type,
int scale,
QEMUTimerCB *cb, void *opaque)
{
timer_init_tl(ts, ctx->tlg.tl[type], scale, cb, opaque);
timer_init_full(ts, &ctx->tlg, type, scale, 0, cb, opaque);
}
/**