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clock/perf: add critical section protection 

Signed-off-by: yinshengkai <yinshengkai@xiaomi.com>
This commit is contained in:
yinshengkai 2024-02-28 11:29:02 +08:00 committed by GUIDINGLI
parent d598da80e4
commit cee252174b
1 changed files with 8 additions and 2 deletions
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10
sched/clock/clock_perf.c
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@ -26,8 +26,9 @@
#include <stdint.h>
#include <nuttx/clock.h>
#include <nuttx/arch.h>
#include <nuttx/clock.h>
#include <nuttx/spinlock.h>
#include <nuttx/wdog.h>
#if defined(CONFIG_PERF_OVERFLOW_CORRECTION) && ULONG_MAX != UINT64_MAX
@ -39,6 +40,7 @@
struct perf_s
{
struct wdog_s wdog;
spinlock_t lock;
unsigned long last;
unsigned long overflow;
};
@ -93,6 +95,8 @@ clock_t perf_gettime(void)
{
FAR struct perf_s *perf = &g_perf;
unsigned long now = up_perf_gettime();
irqstate_t flags = spin_lock_irqsave(&perf->lock);
clock_t result;
/* Check if overflow */
@ -102,7 +106,9 @@ clock_t perf_gettime(void)
}
perf->last = now;
return (clock_t)now | (clock_t)perf->overflow << 32;
result = (clock_t)now | (clock_t)perf->overflow << 32;
spin_unlock_irqrestore(&perf->lock, flags);
return result;
}
/****************************************************************************