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sched/hrtimer: inline hrtimer_start.

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This commit inlined the `hrtimer_start` to allow the compiler to optimize at least 1 branch in
hrtimer_start.

Signed-off-by: ouyangxiangzhen <ouyangxiangzhen@xiaomi.com>
This commit is contained in:
ouyangxiangzhen
2026-01-26 16:46:42 +08:00
committed by Donny(董九柱)
parent fe184f79f3
commit 7b67055150
2 changed files with 21 additions and 22 deletions
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include/nuttx/hrtimer.h
+16 -2
View File
@@ -207,9 +207,23 @@ int hrtimer_cancel_sync(FAR hrtimer_t *hrtimer);
* OK on success; a negated errno value on failure.
****************************************************************************/
int hrtimer_start_absolute(FAR hrtimer_t *hrtimer, hrtimer_entry_t func,
uint64_t expired);
static inline_function
int hrtimer_start(FAR hrtimer_t *hrtimer, hrtimer_entry_t func,
uint64_t expired,
enum hrtimer_mode_e mode);
uint64_t expired, enum hrtimer_mode_e mode)
{
/* In most cases, the mode can be evaluated at compile time.
* The compiler will optimize the code to avoid the branch.
*/
uint64_t next_expired = mode == HRTIMER_MODE_ABS ? expired :
clock_systime_nsec() +
(expired <= HRTIMER_MAX_DELAY ?
expired : HRTIMER_MAX_DELAY);
return hrtimer_start_absolute(hrtimer, func, next_expired);
}
/****************************************************************************
* Name: hrtimer_gettime
sched/hrtimer/hrtimer_start.c
+5 -20
View File
@@ -36,18 +36,17 @@
****************************************************************************/
/****************************************************************************
* Name: hrtimer_start
* Name: hrtimer_start_absolute
*
* Description:
* Start a high-resolution timer to expire after a specified duration
* in nanoseconds, either as an absolute or relative time.
* in nanoseconds.
*
* Input Parameters:
* hrtimer - Pointer to the hrtimer structure.
* func - Expiration callback function.
* expired - Expiration time in nanoseconds. Interpretation
* depends on mode.
* mode - Timer mode (HRTIMER_MODE_ABS or HRTIMER_MODE_REL).
*
* Returned Value:
* OK (0) on success, or a negated errno value on failure.
@@ -60,26 +59,12 @@
* nanoseconds from the current time.
****************************************************************************/
int hrtimer_start(FAR hrtimer_t *hrtimer, hrtimer_entry_t func,
uint64_t expired,
enum hrtimer_mode_e mode)
int hrtimer_start_absolute(FAR hrtimer_t *hrtimer, hrtimer_entry_t func,
uint64_t expired)
{
uint64_t next_expired;
irqstate_t flags;
int ret = OK;
/* Compute absolute expiration time */
if (mode == HRTIMER_MODE_ABS)
{
next_expired = expired;
}
else
{
expired = expired <= HRTIMER_MAX_DELAY ? expired : HRTIMER_MAX_DELAY;
next_expired = clock_systime_nsec() + expired;
}
DEBUGASSERT(hrtimer != NULL);
/* Acquire the lock and seize the ownership of the hrtimer queue. */
@@ -96,7 +81,7 @@ int hrtimer_start(FAR hrtimer_t *hrtimer, hrtimer_entry_t func,
}
hrtimer->func = func;
hrtimer->expired = next_expired;
hrtimer->expired = expired;
/* Insert the timer into the hrtimer queue. */