read access violation when running test in virtual studio 2015

[Kiddinglife]

Hi wahern,

Exception thrown: read access violation.
to->pending was 0x2404943C4E0.

After debugging, I found
at line 350 wheel = timeout_wheel(rem); in file timeout.c
wheel is 9, which is is the reason why write access violation

However, test runs pretty well in ubuntu 16.04

Regards

[Kiddinglife]

After bebugging, I found the reason

at line 196 in file bitops.c
__inline int clz64(uint64_t val)
{
unsigned long zeros = 0;
_BitScanReverse64(&zeros, val);
return (int)zeros;
}

_BitScanReverse64 is actually fls.

[andrewChen2014]

modify like this can fix it
static __inline int clz64(uint64_t val)
{
DWORD zeros = 0;
if (_BitScanReverse64(&zeros, val)) {
return 63 - zeros;
} else {
return 64;
}
}