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06332e6706
The particular need on this is because of the current situation with determining the background functionality for the gettimeofday. DllMain allows to initialize stuff before the DLL can be actually used. Thus, we use different time API on win7 and win8 and later, so the function pointer needs to be initialized before anything in the DLL could even demand it. The change also opens the door for the further optimizations, as now we're able to do the very basic initializations for the whole DLL before it could ever start to live. Fe on this way the TLS initialization could be done, when utilizing the DLL_THREAD_ATTACH/DETACH case. Whether it's really usable in portable way should be synced with other platforms. Be aware that it's dangerous as it possibly causes dead locks. So to use with care. One willing to add items to DllMain should better read the documentation twice and even then try to defer the necessary action.
133 lines
3.4 KiB
C
133 lines
3.4 KiB
C
/*****************************************************************************
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* *
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* DH_TIME.C *
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* *
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* Freely redistributable and modifiable. Use at your own risk. *
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* *
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* Copyright 1994 The Downhill Project *
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*
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* Modified by Shane Caraveo for use with PHP
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*
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*****************************************************************************/
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/* $Id$ */
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/* Include stuff ************************************************************ */
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#include <config.w32.h>
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#include "time.h"
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#include "unistd.h"
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#include "signal.h"
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#include <windows.h>
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#include <winbase.h>
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#include <mmsystem.h>
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#include <errno.h>
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#include "php_win32_globals.h"
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typedef VOID (WINAPI *MyGetSystemTimeAsFileTime)(LPFILETIME lpSystemTimeAsFileTime);
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static MyGetSystemTimeAsFileTime timefunc = NULL;
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#ifdef PHP_EXPORTS
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static zend_always_inline MyGetSystemTimeAsFileTime get_time_func(void)
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{
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MyGetSystemTimeAsFileTime timefunc = NULL;
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HMODULE hMod = GetModuleHandle("kernel32.dll");
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if (hMod) {
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/* Max possible resolution <1us, win8/server2012 */
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timefunc = (MyGetSystemTimeAsFileTime)GetProcAddress(hMod, "GetSystemTimePreciseAsFileTime");
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if(!timefunc) {
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/* 100ns blocks since 01-Jan-1641 */
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timefunc = (MyGetSystemTimeAsFileTime)GetProcAddress(hMod, "GetSystemTimeAsFileTime");
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}
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}
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return timefunc;
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}
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BOOL php_win32_init_gettimeofday(void)
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{
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timefunc = get_time_func();
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return (NULL != timefunc);
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}
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#endif
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static zend_always_inline int getfilesystemtime(struct timeval *tv)
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{
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FILETIME ft;
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unsigned __int64 ff = 0;
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ULARGE_INTEGER fft;
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timefunc(&ft);
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/*
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* Do not cast a pointer to a FILETIME structure to either a
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* ULARGE_INTEGER* or __int64* value because it can cause alignment faults on 64-bit Windows.
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* via http://technet.microsoft.com/en-us/library/ms724284(v=vs.85).aspx
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*/
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fft.HighPart = ft.dwHighDateTime;
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fft.LowPart = ft.dwLowDateTime;
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ff = fft.QuadPart;
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ff /= 10Ui64; /* convert to microseconds */
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ff -= 11644473600000000Ui64; /* convert to unix epoch */
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tv->tv_sec = (long)(ff / 1000000Ui64);
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tv->tv_usec = (long)(ff % 1000000Ui64);
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return 0;
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}
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PHPAPI int gettimeofday(struct timeval *time_Info, struct timezone *timezone_Info)
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{
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/* Get the time, if they want it */
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if (time_Info != NULL) {
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getfilesystemtime(time_Info);
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}
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/* Get the timezone, if they want it */
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if (timezone_Info != NULL) {
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_tzset();
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timezone_Info->tz_minuteswest = _timezone;
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timezone_Info->tz_dsttime = _daylight;
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}
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/* And return */
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return 0;
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}
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PHPAPI int usleep(unsigned int useconds)
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{
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HANDLE timer;
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LARGE_INTEGER due;
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due.QuadPart = -(10 * (__int64)useconds);
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timer = CreateWaitableTimer(NULL, TRUE, NULL);
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SetWaitableTimer(timer, &due, 0, NULL, NULL, 0);
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WaitForSingleObject(timer, INFINITE);
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CloseHandle(timer);
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return 0;
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}
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PHPAPI int nanosleep( const struct timespec * rqtp, struct timespec * rmtp )
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{
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if (rqtp->tv_nsec > 999999999) {
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/* The time interval specified 1,000,000 or more microseconds. */
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errno = EINVAL;
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return -1;
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}
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return usleep( rqtp->tv_sec * 1000000 + rqtp->tv_nsec / 1000 );
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}
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/*
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* Local variables:
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* tab-width: 4
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* c-basic-offset: 4
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* End:
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* vim600: sw=4 ts=4 fdm=marker
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* vim<600: sw=4 ts=4
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*/
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