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author | slayercat <llz916148@yahoo.com.cn> | 2012-05-23 20:30:16 +0800 |
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committer | Xinchen Hui <laruence@php.net> | 2012-06-07 14:28:05 +0800 |
commit | d9810af45ae9e3cbd2c97543b5dfa2d7c93e81c1 (patch) | |
tree | 2c482f8d2c52eaf9d664c6176ec491020b85e2bc /win32/time.c | |
parent | c1ac3252288c2eeb0b9278458ad15e19912a945a (diff) | |
download | php-git-d9810af45ae9e3cbd2c97543b5dfa2d7c93e81c1.tar.gz |
based on microsoft's description,the direct convert from FILETIME struct to __int64 is unsafe.
via http://technet.microsoft.com/en-us/library/ms724284(v=vs.85).aspx
"Do not cast a pointer to a FILETIME structure to either a
ULARGE_INTEGER* or __int64* value because it can cause alignment faults on 64-bit Windows."
Diffstat (limited to 'win32/time.c')
-rw-r--r-- | win32/time.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/win32/time.c b/win32/time.c index a376fd61be..8b847b09ff 100644 --- a/win32/time.c +++ b/win32/time.c @@ -1,4 +1,3 @@ - /***************************************************************************** * * * DH_TIME.C * @@ -37,10 +36,21 @@ int getfilesystemtime(struct timeval *time_Info) { FILETIME ft; __int64 ff; +ULARGE_INTEGER convFromft; GetSystemTimeAsFileTime(&ft); /* 100 ns blocks since 01-Jan-1641 */ /* resolution seems to be 0.01 sec */ - ff = *(__int64*)(&ft); + /* ff = *(__int64*)(&ft); */ + /* + Do not cast a pointer to a FILETIME structure to either a + ULARGE_INTEGER* or __int64* value because it can cause alignment faults on 64-bit Windows. + + via http://technet.microsoft.com/en-us/library/ms724284(v=vs.85).aspx + */ + convFromft.HighPart = ft.dwHighDateTime; + convFromft.LowPart = ft.dwLowDateTime; + ff = convFromft.QuadPart; + time_Info->tv_sec = (int)(ff/(__int64)10000000-(__int64)11644473600); time_Info->tv_usec = (int)(ff % 10000000)/10; return 0; |