| /* $Id$ */ |
| /* |
| * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) |
| * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| #include <pj/os.h> |
| #include <pj/string.h> |
| #include <pj/log.h> |
| #include <windows.h> |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| #define SECS_TO_FT_MULT 10000000 |
| |
| static LARGE_INTEGER base_time; |
| |
| #if defined(PJ_WIN32_WINCE) && PJ_WIN32_WINCE |
| # define WINCE_TIME |
| #endif |
| |
| #ifdef WINCE_TIME |
| /* Note: |
| * In Windows CE/Windows Mobile platforms, the availability of milliseconds |
| * time resolution in SYSTEMTIME.wMilliseconds depends on the OEM, and most |
| * likely it won't be available. When it's not available, the |
| * SYSTEMTIME.wMilliseconds will contain a constant arbitrary value. |
| * |
| * Because of that, we need to emulate the milliseconds time resolution |
| * using QueryPerformanceCounter() (via pj_get_timestamp() API). However |
| * there is limitation on using this, i.e. the time returned by |
| * pj_gettimeofday() may be off by up to plus/minus 999 msec (the second |
| * part will be correct, however the msec part may be off), because we're |
| * not synchronizing the msec field with the change of value of the "second" |
| * field of the system time. |
| * |
| * Also there is other caveat which need to be handled (and they are |
| * handled by this implementation): |
| * - user may change system time, so pj_gettimeofday() needs to periodically |
| * checks if system time has changed. The period on which system time is |
| * checked is controlled by PJ_WINCE_TIME_CHECK_INTERVAL macro. |
| */ |
| static LARGE_INTEGER g_start_time; /* Time gettimeofday() is first called */ |
| static pj_timestamp g_start_tick; /* TS gettimeofday() is first called */ |
| static pj_timestamp g_last_update; /* Last time check_system_time() is |
| called, to periodically synchronize |
| with up-to-date system time (in case |
| user changes system time). */ |
| static pj_uint64_t g_update_period; /* Period (in TS) check_system_time() |
| should be called. */ |
| |
| /* Period on which check_system_time() is called, in seconds */ |
| #ifndef PJ_WINCE_TIME_CHECK_INTERVAL |
| # define PJ_WINCE_TIME_CHECK_INTERVAL (10) |
| #endif |
| |
| #endif |
| |
| #ifdef WINCE_TIME |
| static pj_status_t init_start_time(void) |
| { |
| SYSTEMTIME st; |
| FILETIME ft; |
| pj_timestamp freq; |
| pj_status_t status; |
| |
| GetLocalTime(&st); |
| SystemTimeToFileTime(&st, &ft); |
| |
| g_start_time.LowPart = ft.dwLowDateTime; |
| g_start_time.HighPart = ft.dwHighDateTime; |
| g_start_time.QuadPart /= SECS_TO_FT_MULT; |
| g_start_time.QuadPart -= base_time.QuadPart; |
| |
| status = pj_get_timestamp(&g_start_tick); |
| if (status != PJ_SUCCESS) |
| return status; |
| |
| g_last_update.u64 = g_start_tick.u64; |
| |
| status = pj_get_timestamp_freq(&freq); |
| if (status != PJ_SUCCESS) |
| return status; |
| |
| g_update_period = PJ_WINCE_TIME_CHECK_INTERVAL * freq.u64; |
| |
| PJ_LOG(4,("os_time_win32.c", "WinCE time (re)started")); |
| |
| return PJ_SUCCESS; |
| } |
| |
| static pj_status_t check_system_time(pj_uint64_t ts_elapsed) |
| { |
| enum { MIS = 5 }; |
| SYSTEMTIME st; |
| FILETIME ft; |
| LARGE_INTEGER cur, calc; |
| DWORD diff; |
| pj_timestamp freq; |
| pj_status_t status; |
| |
| /* Get system's current time */ |
| GetLocalTime(&st); |
| SystemTimeToFileTime(&st, &ft); |
| |
| cur.LowPart = ft.dwLowDateTime; |
| cur.HighPart = ft.dwHighDateTime; |
| cur.QuadPart /= SECS_TO_FT_MULT; |
| cur.QuadPart -= base_time.QuadPart; |
| |
| /* Get our calculated system time */ |
| status = pj_get_timestamp_freq(&freq); |
| if (status != PJ_SUCCESS) |
| return status; |
| |
| calc.QuadPart = g_start_time.QuadPart + ts_elapsed / freq.u64; |
| |
| /* See the difference between calculated and actual system time */ |
| if (calc.QuadPart >= cur.QuadPart) { |
| diff = (DWORD)(calc.QuadPart - cur.QuadPart); |
| } else { |
| diff = (DWORD)(cur.QuadPart - calc.QuadPart); |
| } |
| |
| if (diff > MIS) { |
| /* System time has changed */ |
| PJ_LOG(3,("os_time_win32.c", "WinCE system time changed detected " |
| "(diff=%u)", diff)); |
| status = init_start_time(); |
| } else { |
| status = PJ_SUCCESS; |
| } |
| |
| return status; |
| } |
| |
| #endif |
| |
| // Find 1st Jan 1970 as a FILETIME |
| static pj_status_t get_base_time(void) |
| { |
| SYSTEMTIME st; |
| FILETIME ft; |
| pj_status_t status = PJ_SUCCESS; |
| |
| memset(&st,0,sizeof(st)); |
| st.wYear=1970; |
| st.wMonth=1; |
| st.wDay=1; |
| SystemTimeToFileTime(&st, &ft); |
| |
| base_time.LowPart = ft.dwLowDateTime; |
| base_time.HighPart = ft.dwHighDateTime; |
| base_time.QuadPart /= SECS_TO_FT_MULT; |
| |
| #ifdef WINCE_TIME |
| pj_enter_critical_section(); |
| status = init_start_time(); |
| pj_leave_critical_section(); |
| #endif |
| |
| return status; |
| } |
| |
| PJ_DEF(pj_status_t) pj_gettimeofday(pj_time_val *tv) |
| { |
| #ifdef WINCE_TIME |
| pj_timestamp tick; |
| pj_uint64_t msec_elapsed; |
| #else |
| SYSTEMTIME st; |
| FILETIME ft; |
| LARGE_INTEGER li; |
| #endif |
| pj_status_t status; |
| |
| if (base_time.QuadPart == 0) { |
| status = get_base_time(); |
| if (status != PJ_SUCCESS) |
| return status; |
| } |
| |
| #ifdef WINCE_TIME |
| do { |
| status = pj_get_timestamp(&tick); |
| if (status != PJ_SUCCESS) |
| return status; |
| |
| if (tick.u64 - g_last_update.u64 >= g_update_period) { |
| pj_enter_critical_section(); |
| if (tick.u64 - g_last_update.u64 >= g_update_period) { |
| g_last_update.u64 = tick.u64; |
| check_system_time(tick.u64 - g_start_tick.u64); |
| } |
| pj_leave_critical_section(); |
| } else { |
| break; |
| } |
| } while (1); |
| |
| msec_elapsed = pj_elapsed_msec64(&g_start_tick, &tick); |
| |
| tv->sec = (long)(g_start_time.QuadPart + msec_elapsed/1000); |
| tv->msec = (long)(msec_elapsed % 1000); |
| #else |
| /* Standard Win32 GetLocalTime */ |
| GetLocalTime(&st); |
| SystemTimeToFileTime(&st, &ft); |
| |
| li.LowPart = ft.dwLowDateTime; |
| li.HighPart = ft.dwHighDateTime; |
| li.QuadPart /= SECS_TO_FT_MULT; |
| li.QuadPart -= base_time.QuadPart; |
| |
| tv->sec = li.LowPart; |
| tv->msec = st.wMilliseconds; |
| #endif /* WINCE_TIME */ |
| |
| return PJ_SUCCESS; |
| } |
| |
| PJ_DEF(pj_status_t) pj_time_decode(const pj_time_val *tv, pj_parsed_time *pt) |
| { |
| LARGE_INTEGER li; |
| FILETIME ft; |
| SYSTEMTIME st; |
| |
| li.QuadPart = tv->sec; |
| li.QuadPart += base_time.QuadPart; |
| li.QuadPart *= SECS_TO_FT_MULT; |
| |
| ft.dwLowDateTime = li.LowPart; |
| ft.dwHighDateTime = li.HighPart; |
| FileTimeToSystemTime(&ft, &st); |
| |
| pt->year = st.wYear; |
| pt->mon = st.wMonth-1; |
| pt->day = st.wDay; |
| pt->wday = st.wDayOfWeek; |
| |
| pt->hour = st.wHour; |
| pt->min = st.wMinute; |
| pt->sec = st.wSecond; |
| pt->msec = tv->msec; |
| |
| return PJ_SUCCESS; |
| } |
| |
| /** |
| * Encode parsed time to time value. |
| */ |
| PJ_DEF(pj_status_t) pj_time_encode(const pj_parsed_time *pt, pj_time_val *tv) |
| { |
| SYSTEMTIME st; |
| FILETIME ft; |
| LARGE_INTEGER li; |
| |
| pj_bzero(&st, sizeof(st)); |
| st.wYear = (pj_uint16_t) pt->year; |
| st.wMonth = (pj_uint16_t) (pt->mon + 1); |
| st.wDay = (pj_uint16_t) pt->day; |
| st.wHour = (pj_uint16_t) pt->hour; |
| st.wMinute = (pj_uint16_t) pt->min; |
| st.wSecond = (pj_uint16_t) pt->sec; |
| st.wMilliseconds = (pj_uint16_t) pt->msec; |
| |
| SystemTimeToFileTime(&st, &ft); |
| |
| li.LowPart = ft.dwLowDateTime; |
| li.HighPart = ft.dwHighDateTime; |
| li.QuadPart /= SECS_TO_FT_MULT; |
| li.QuadPart -= base_time.QuadPart; |
| |
| tv->sec = li.LowPart; |
| tv->msec = st.wMilliseconds; |
| |
| return PJ_SUCCESS; |
| } |
| |
| /** |
| * Convert local time to GMT. |
| */ |
| PJ_DEF(pj_status_t) pj_time_local_to_gmt(pj_time_val *tv); |
| |
| /** |
| * Convert GMT to local time. |
| */ |
| PJ_DEF(pj_status_t) pj_time_gmt_to_local(pj_time_val *tv); |
| |
| |