GetSystemTimePreciseAsFileTime() is now always available (GH-15400)

* GetSystemTimePreciseAsFileTime() is now always available

As of PHP 8.3.0, we require Windows Server 2012 or Windows 8 as bare
minimum.  Since GetSystemTimePreciseAsFileTime() is always available on
these Windows versions[1], there is no more need for the workaround
described in dllmain.c; we just can call the function directly.

[1] <https://learn.microsoft.com/en-us/windows/win32/api/sysinfoapi/nf-sysinfoapi-getsystemtimepreciseasfiletime>

Author: cmb69

win32/dllmain.c

@@ -38,20 +38,6 @@ BOOL WINAPI DllMain(HINSTANCE inst, DWORD reason, LPVOID dummy)
 	switch (reason)
 	{
 		case DLL_PROCESS_ATTACH:
-			/*
-			 * We do not need to check the return value of php_win32_init_gettimeofday()
-			 * because the symbol bare minimum symbol we need is always available on our
-			 * lowest supported platform.
-			 *
-			 * On Windows 8 or greater, we use a more precise symbol to obtain the system
-			 * time, which is dynamically. The fallback allows us to proper support
-			 * Vista/7/Server 2003 R2/Server 2008/Server 2008 R2.
-			 *
-			 * Instead simply initialize the global in win32/time.c for gettimeofday()
-			 * use later on
-			 */
-			php_win32_init_gettimeofday();
-
 			ret = ret && php_win32_ioutil_init();
 			if (!ret) {
 				fprintf(stderr, "ioutil initialization failed");

win32/time.c

@@ -23,42 +23,13 @@
 #include <errno.h>
 #include "php_win32_globals.h"
 
-typedef VOID (WINAPI *MyGetSystemTimeAsFileTime)(LPFILETIME lpSystemTimeAsFileTime);
-
-static MyGetSystemTimeAsFileTime timefunc = NULL;
-
-#ifdef PHP_EXPORTS
-static zend_always_inline MyGetSystemTimeAsFileTime get_time_func(void)
-{/*{{{*/
-	MyGetSystemTimeAsFileTime timefunc = NULL;
-	HMODULE hMod = GetModuleHandle("kernel32.dll");
-
-	if (hMod) {
-		/* Max possible resolution <1us, win8/server2012 */
-		timefunc = (MyGetSystemTimeAsFileTime)GetProcAddress(hMod, "GetSystemTimePreciseAsFileTime");
-	}
-
-	if(!timefunc) {
-		/* 100ns blocks since 01-Jan-1641 */
-		timefunc = (MyGetSystemTimeAsFileTime) GetSystemTimeAsFileTime;
-	}
-
-	return timefunc;
-}/*}}}*/
-
-void php_win32_init_gettimeofday(void)
-{/*{{{*/
-	timefunc = get_time_func();
-}/*}}}*/
-#endif
-
 static zend_always_inline int getfilesystemtime(struct timeval *tv)
 {/*{{{*/
 	FILETIME ft;
 	unsigned __int64 ff = 0;
 	ULARGE_INTEGER fft;
 
-	timefunc(&ft);
+	GetSystemTimePreciseAsFileTime(&ft);
 
         /*
 	 * Do not cast a pointer to a FILETIME structure to either a