diff options
Diffstat (limited to 'erts/emulator/sys/win32/sys_time.c')
| -rw-r--r-- | erts/emulator/sys/win32/sys_time.c | 54 |
1 files changed, 47 insertions, 7 deletions
diff --git a/erts/emulator/sys/win32/sys_time.c b/erts/emulator/sys/win32/sys_time.c index fc868507cb..af903aacfd 100644 --- a/erts/emulator/sys/win32/sys_time.c +++ b/erts/emulator/sys/win32/sys_time.c @@ -35,7 +35,24 @@ /******************* Routines for time measurement *********************/ #define EPOCH_JULIAN_DIFF LL_LITERAL(11644473600) - +#define TICKS_PER_SECOND (10000000LL) + +#define EPOCH_TO_FILETIME(ft, epoch) \ + do { \ + ULARGE_INTEGER ull; \ + ull.QuadPart = (((epoch) + EPOCH_JULIAN_DIFF) * TICKS_PER_SECOND); \ + (ft).dwLowDateTime = ull.LowPart; \ + (ft).dwHighDateTime = ull.HighPart; \ + } while(0) + +#define FILETIME_TO_EPOCH(epoch, ft) \ + do { \ + ULARGE_INTEGER ull; \ + ull.LowPart = (ft).dwLowDateTime; \ + ull.HighPart = (ft).dwHighDateTime; \ + (epoch) = ((ull.QuadPart / TICKS_PER_SECOND) - EPOCH_JULIAN_DIFF); \ + } while(0) + static SysHrTime wrap = 0; static DWORD last_tick_count = 0; @@ -45,6 +62,35 @@ sys_init_time(void) return 1; } +struct tm * sys_localtime_r(time_t *epochs, struct tm *ptm) +{ + FILETIME ft,lft; + SYSTEMTIME st; + + if ((((*epochs) + EPOCH_JULIAN_DIFF) * TICKS_PER_SECOND) < 0LL) { + return NULL; + } + + EPOCH_TO_FILETIME(ft,*epochs); + + if (!FileTimeToLocalFileTime(&ft,&lft)) { + return NULL; + } + + if (!FileTimeToSystemTime(&lft,&st)) { + return NULL; + } + + ptm->tm_year = (int) st.wYear - 1900; + ptm->tm_mon = (int) st.wMonth - 1; + ptm->tm_mday = (int) st.wDay; + ptm->tm_hour = (int) st.wHour; + ptm->tm_min = (int) st.wMinute; + ptm->tm_sec = (int) st.wSecond; + + return ptm; +} + void sys_gettimeofday(SysTimeval *tv) { @@ -91,9 +137,3 @@ sys_times(SysTimes *buffer) { buffer->tms_stime = (clock_t) (system & LL_LITERAL(0x7FFFFFFF)); return kernel_ticks; } - - - - - - |