this function spin sleeps for t nanoseconds
Signed-off-by: Paul Semel <phen...@amazon.de>
---
Notes:
v4:
- new patch version
common/time.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/common/time.c b/common/time.c
index 8489f3b..232e134 100644
--- a/common/time.c
+++ b/common/time.c
@@ -139,6 +139,18 @@ int gettimeofday(struct timeval *tp, void *restrict tzp)
return 0;
}
+static inline void nspin_sleep(uint64_t t)
+{
+ uint64_t curr = since_boot_time();
+ uint64_t end = curr + t;
+
+ if ( end < curr )
+ panic("end value overflows counter\n");
+
+ while ( since_boot_time() < end )
+ asm volatile ("pause");
+}
+
/*
* Local variables:
* mode: C
--
2.16.1
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-devel
