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std: Fix Windows system time conversion for get_time()

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This commit is contained in:
Chris Peterson 2012-02-18 01:21:26 -08:00
parent ef6f628589
commit 123a920f59
1 changed files with 13 additions and 10 deletions
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23
src/rt/rust_builtin.cpp
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@ -393,18 +393,21 @@ rust_ptr_eq(type_desc *t, rust_box *a, rust_box *b) {
#if defined(__WIN32__)
extern "C" CDECL void
get_time(uint32_t *sec, uint32_t *usec) {
rust_task *task = rust_task_thread::get_task();
SYSTEMTIME systemTime;
FILETIME fileTime;
GetSystemTime(&systemTime);
if (!SystemTimeToFileTime(&systemTime, &fileTime)) {
task->fail();
return;
}
GetSystemTimeAsFileTime(&fileTime);
// FIXME: This is probably completely wrong.
*sec = fileTime.dwHighDateTime;
*usec = fileTime.dwLowDateTime;
// A FILETIME contains a 64-bit value representing the number of
// hectonanosecond (100-nanosecond) intervals since 1601-01-01T00:00:00Z.
// http://support.microsoft.com/kb/167296/en-us
ULARGE_INTEGER ul;
ul.LowPart = fileTime.dwLowDateTime;
ul.HighPart = fileTime.dwHighDateTime;
uint64_t ns_since_1601 = ul.QuadPart / 10;
const uint64_t NANOSECONDS_FROM_1601_TO_1970 = 11644473600000000u;
uint64_t ns_since_1970 = ns_since_1601 - NANOSECONDS_FROM_1601_TO_1970;
*sec = ns_since_1970 / 1000000;
*usec = ns_since_1970 % 1000000;
}
#else
extern "C" CDECL void